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<title>Service · Kubernetes Handbook - jimmysong.io</title>
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<a href="https://jimmysong.io" target="_blank" class="custom-link">Jimmy Song</a>
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<li class="header">前言</li>
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<b>1.1.</b>
序言
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<b>1.2.</b>
Kubernetes与云原生应用概览
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<li class="header">概念与原理</li>
<li class="chapter " data-level="2.1" data-path="./">
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<a href="./">
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<b>2.1.</b>
Kubernetes架构
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</a>
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<li class="chapter " data-level="2.2" data-path="concepts.html">
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<b>2.2.</b>
设计理念
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<b>2.3.</b>
资源对象与基本概念解析
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<b>2.3.1.</b>
Pod
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<a href="pod.html">
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<b>2.3.1.1.</b>
Pod解析
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</a>
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<a href="init-containers.html">
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<b>2.3.1.2.</b>
Init容器
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</a>
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<li class="chapter " data-level="2.3.1.3" data-path="pod-security-policy.html">
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<a href="pod-security-policy.html">
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<b>2.3.1.3.</b>
Pod安全策略
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</a>
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<b>2.3.1.4.</b>
Pod的生命周期
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<b>2.3.1.5.</b>
Pod hook
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<b>2.3.2.</b>
Node
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</a>
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<b>2.3.3.</b>
Namespace
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<b>2.3.4.</b>
Service
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</a>
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<a href="volume.html">
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<b>2.3.5.</b>
Volume和Persistent Volume
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</a>
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<a href="deployment.html">
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<b>2.3.6.</b>
Deployment
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</a>
</li>
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<a href="secret.html">
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<b>2.3.7.</b>
Secret
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</a>
</li>
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<a href="statefulset.html">
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<b>2.3.8.</b>
StatefulSet
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</a>
</li>
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<b>2.3.9.</b>
DaemonSet
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</a>
</li>
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<li class="chapter " data-level="2.3.10" data-path="serviceaccount.html">
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<a href="serviceaccount.html">
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<b>2.3.10.</b>
ServiceAccount
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</a>
</li>
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<li class="chapter " data-level="2.3.11" data-path="replicaset.html">
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<a href="replicaset.html">
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<b>2.3.11.</b>
ReplicationController和ReplicaSet
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</a>
</li>
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<li class="chapter " data-level="2.3.12" data-path="job.html">
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<a href="job.html">
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<b>2.3.12.</b>
Job
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</a>
</li>
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<li class="chapter " data-level="2.3.13" data-path="cronjob.html">
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<a href="cronjob.html">
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<b>2.3.13.</b>
CronJob
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</a>
</li>
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<li class="chapter " data-level="2.3.14" data-path="ingress.html">
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<a href="ingress.html">
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<b>2.3.14.</b>
Ingress
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</a>
</li>
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<li class="chapter " data-level="2.3.15" data-path="configmap.html">
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<a href="configmap.html">
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<b>2.3.15.</b>
ConfigMap
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</a>
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<ul class="articles">
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<li class="chapter " data-level="2.3.15.1" data-path="configmap-hot-update.html">
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<a href="configmap-hot-update.html">
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<b>2.3.15.1.</b>
ConfigMap的热更新
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</a>
</li>
</ul>
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</li>
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<li class="chapter " data-level="2.3.16" data-path="horizontal-pod-autoscaling.html">
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<a href="horizontal-pod-autoscaling.html">
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<b>2.3.16.</b>
Horizontal Pod Autoscaling
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</a>
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<ul class="articles">
<li class="chapter " data-level="2.3.16.1" data-path="custom-metrics-hpa.html">
<a href="custom-metrics-hpa.html">
<b>2.3.16.1.</b>
自定义指标HPA
</a>
</li>
</ul>
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</li>
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<li class="chapter " data-level="2.3.17" data-path="label.html">
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<a href="label.html">
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<b>2.3.17.</b>
Label
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</a>
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</li>
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<li class="chapter " data-level="2.3.18" data-path="garbage-collection.html">
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<a href="garbage-collection.html">
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<b>2.3.18.</b>
垃圾收集
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</a>
</li>
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<li class="chapter " data-level="2.3.19" data-path="network-policy.html">
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<a href="network-policy.html">
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<b>2.3.19.</b>
NetworkPolicy
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</a>
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</li>
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<li class="chapter " data-level="2.3.20" data-path="annotation.html">
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<a href="annotation.html">
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<b>2.3.20.</b>
Annotation
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</a>
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</li>
<li class="chapter " data-level="2.3.21" data-path="aggregated-api-server.html">
<a href="aggregated-api-server.html">
<b>2.3.21.</b>
Aggregated API Server
</a>
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</li>
<li class="chapter " data-level="2.3.22" data-path="custom-resource.html">
<a href="custom-resource.html">
<b>2.3.22.</b>
CRD-自定义资源
</a>
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</li>
</ul>
</li>
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<li class="header">用户指南</li>
<li class="chapter " data-level="3.1" data-path="../guide/">
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<a href="../guide/">
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<b>3.1.</b>
用户指南
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</a>
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</li>
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<li class="chapter " data-level="3.2" data-path="../guide/resource-configuration.html">
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<a href="../guide/resource-configuration.html">
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<b>3.2.</b>
资源对象配置
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</a>
<ul class="articles">
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<li class="chapter " data-level="3.2.1" data-path="../guide/configure-liveness-readiness-probes.html">
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<a href="../guide/configure-liveness-readiness-probes.html">
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<b>3.2.1.</b>
配置Pod的liveness和readiness探针
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</a>
</li>
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<li class="chapter " data-level="3.2.2" data-path="../guide/configure-pod-service-account.html">
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<a href="../guide/configure-pod-service-account.html">
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<b>3.2.2.</b>
配置Pod的Service Account
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</a>
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</li>
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<li class="chapter " data-level="3.2.3" data-path="../guide/secret-configuration.html">
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<a href="../guide/secret-configuration.html">
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<b>3.2.3.</b>
Secret配置
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</a>
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</li>
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<li class="chapter " data-level="3.2.4" data-path="../guide/resource-quota-management.html">
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<a href="../guide/resource-quota-management.html">
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<b>3.2.4.</b>
管理namespace中的资源配额
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</a>
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</li>
</ul>
</li>
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<li class="chapter " data-level="3.3" data-path="../guide/command-usage.html">
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<a href="../guide/command-usage.html">
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<b>3.3.</b>
命令使用
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</a>
<ul class="articles">
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<li class="chapter " data-level="3.3.1" data-path="../guide/docker-cli-to-kubectl.html">
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<a href="../guide/docker-cli-to-kubectl.html">
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<b>3.3.1.</b>
docker用户过度到kubectl命令行指南
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</a>
</li>
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<li class="chapter " data-level="3.3.2" data-path="../guide/using-kubectl.html">
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<a href="../guide/using-kubectl.html">
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<b>3.3.2.</b>
kubectl命令概览
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</a>
</li>
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<li class="chapter " data-level="3.3.3" data-path="../guide/kubectl-cheatsheet.html">
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<a href="../guide/kubectl-cheatsheet.html">
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<b>3.3.3.</b>
kubectl命令技巧大全
</a>
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</li>
<li class="chapter " data-level="3.3.4" data-path="../guide/using-etcdctl-to-access-kubernetes-data.html">
<a href="../guide/using-etcdctl-to-access-kubernetes-data.html">
<b>3.3.4.</b>
使用etcdctl访问kuberentes数据
</a>
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</li>
</ul>
</li>
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<li class="chapter " data-level="3.4" data-path="../guide/cluster-security-management.html">
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<a href="../guide/cluster-security-management.html">
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<b>3.4.</b>
集群安全性管理
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</a>
<ul class="articles">
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<li class="chapter " data-level="3.4.1" data-path="../guide/managing-tls-in-a-cluster.html">
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<a href="../guide/managing-tls-in-a-cluster.html">
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<b>3.4.1.</b>
管理集群中的TLS
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</a>
</li>
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<li class="chapter " data-level="3.4.2" data-path="../guide/kubelet-authentication-authorization.html">
<a href="../guide/kubelet-authentication-authorization.html">
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<b>3.4.2.</b>
kubelet的认证授权
</a>
</li>
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<li class="chapter " data-level="3.4.3" data-path="../guide/tls-bootstrapping.html">
<a href="../guide/tls-bootstrapping.html">
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<b>3.4.3.</b>
TLS bootstrap
</a>
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</li>
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<li class="chapter " data-level="3.4.4" data-path="../guide/kubectl-user-authentication-authorization.html">
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<a href="../guide/kubectl-user-authentication-authorization.html">
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<b>3.4.4.</b>
创建用户认证授权的kubeconfig文件
2017-08-31 14:23:44 +08:00
</a>
</li>
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<li class="chapter " data-level="3.4.5" data-path="../guide/rbac.html">
2017-08-31 14:23:44 +08:00
<a href="../guide/rbac.html">
2017-11-15 21:18:59 +08:00
<b>3.4.5.</b>
RBAC——基于角色的访问控制
2017-08-31 14:23:44 +08:00
</a>
2017-09-07 14:13:59 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.4.6" data-path="../guide/ip-masq-agent.html">
2017-09-07 14:13:59 +08:00
<a href="../guide/ip-masq-agent.html">
2017-11-15 21:18:59 +08:00
<b>3.4.6.</b>
IP伪装代理
2017-09-07 14:13:59 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.4.7" data-path="../guide/auth-with-kubeconfig-or-token.html">
<a href="../guide/auth-with-kubeconfig-or-token.html">
2017-11-15 21:18:59 +08:00
<b>3.4.7.</b>
使用kubeconfig或token进行用户身份认证
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.4.8" data-path="../guide/authentication.html">
<a href="../guide/authentication.html">
2017-11-15 21:18:59 +08:00
<b>3.4.8.</b>
kubernetes中的用户与身份认证授权
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.5" data-path="../guide/access-kubernetes-cluster.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/access-kubernetes-cluster.html">
2017-11-15 21:18:59 +08:00
<b>3.5.</b>
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访问Kubernetes集群
2017-08-21 17:44:43 +08:00
</a>
<ul class="articles">
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<li class="chapter " data-level="3.5.1" data-path="../guide/access-cluster.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/access-cluster.html">
2017-11-15 21:18:59 +08:00
<b>3.5.1.</b>
访问集群
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.5.2" data-path="../guide/authenticate-across-clusters-kubeconfig.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/authenticate-across-clusters-kubeconfig.html">
2017-11-15 21:18:59 +08:00
<b>3.5.2.</b>
2017-11-21 20:10:10 +08:00
使用kubeconfig文件配置跨集群认证
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.5.3" data-path="../guide/connecting-to-applications-port-forward.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/connecting-to-applications-port-forward.html">
2017-11-15 21:18:59 +08:00
<b>3.5.3.</b>
通过端口转发访问集群中的应用程序
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.5.4" data-path="../guide/service-access-application-cluster.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/service-access-application-cluster.html">
2017-11-15 21:18:59 +08:00
<b>3.5.4.</b>
2017-11-21 20:10:10 +08:00
使用service访问群集中的应用程序
</a>
</li>
<li class="chapter " data-level="3.5.5" data-path="../guide/accessing-kubernetes-pods-from-outside-of-the-cluster.html">
<a href="../guide/accessing-kubernetes-pods-from-outside-of-the-cluster.html">
<b>3.5.5.</b>
从外部访问Kubernetes中的Pod
2017-08-21 17:44:43 +08:00
</a>
2017-11-22 18:43:03 +08:00
</li>
<li class="chapter " data-level="3.5.6" data-path="../guide/carbin-mobile-dashboard-for-kubernetes.html">
<a href="../guide/carbin-mobile-dashboard-for-kubernetes.html">
<b>3.5.6.</b>
Carbin - Kuberentes手机客户端
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.6" data-path="../guide/application-development-deployment-flow.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/application-development-deployment-flow.html">
2017-11-15 21:18:59 +08:00
<b>3.6.</b>
在kubernetes中开发部署应用
2017-08-21 17:44:43 +08:00
</a>
<ul class="articles">
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<li class="chapter " data-level="3.6.1" data-path="../guide/deploy-applications-in-kubernetes.html">
2017-08-21 17:44:43 +08:00
<a href="../guide/deploy-applications-in-kubernetes.html">
2017-11-15 21:18:59 +08:00
<b>3.6.1.</b>
适用于kubernetes的应用开发部署流程
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.6.2" data-path="../guide/migrating-hadoop-yarn-to-kubernetes.html">
<a href="../guide/migrating-hadoop-yarn-to-kubernetes.html">
2017-11-15 21:18:59 +08:00
<b>3.6.2.</b>
迁移传统应用到kubernetes中——以Hadoop YARN为例
</a>
2017-10-23 13:40:58 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="3.6.3" data-path="../guide/using-statefulset.html">
2017-10-23 13:40:58 +08:00
<a href="../guide/using-statefulset.html">
2017-11-15 21:18:59 +08:00
<b>3.6.3.</b>
使用StatefulSet部署用状态应用
2017-10-23 13:40:58 +08:00
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="header">最佳实践</li>
<li class="chapter " data-level="4.1" data-path="../practice/">
2017-08-21 17:44:43 +08:00
<a href="../practice/">
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<b>4.1.</b>
最佳实践概览
2017-08-21 17:44:43 +08:00
</a>
2017-11-15 21:18:59 +08:00
</li>
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2" data-path="../practice/install-kbernetes1.6-on-centos.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/install-kbernetes1.6-on-centos.html">
2017-11-15 21:18:59 +08:00
<b>4.2.</b>
在CentOS上部署kubernetes1.6集群
2017-08-21 17:44:43 +08:00
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.1" data-path="../practice/create-tls-and-secret-key.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/create-tls-and-secret-key.html">
2017-11-15 21:18:59 +08:00
<b>4.2.1.</b>
创建TLS证书和秘钥
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.2" data-path="../practice/create-kubeconfig.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/create-kubeconfig.html">
2017-11-15 21:18:59 +08:00
<b>4.2.2.</b>
创建kubeconfig文件
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.3" data-path="../practice/etcd-cluster-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/etcd-cluster-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.3.</b>
创建高可用etcd集群
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.4" data-path="../practice/kubectl-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/kubectl-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.4.</b>
安装kubectl命令行工具
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.5" data-path="../practice/master-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/master-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.5.</b>
部署master节点
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.6" data-path="../practice/node-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/node-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.6.</b>
部署node节点
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.7" data-path="../practice/kubedns-addon-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/kubedns-addon-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.7.</b>
安装kubedns插件
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.8" data-path="../practice/dashboard-addon-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/dashboard-addon-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.8.</b>
安装dashboard插件
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.9" data-path="../practice/heapster-addon-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/heapster-addon-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.9.</b>
安装heapster插件
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.2.10" data-path="../practice/efk-addon-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/efk-addon-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.2.10.</b>
安装EFK插件
2017-08-21 17:44:43 +08:00
</a>
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.3" data-path="../practice/service-discovery-and-loadbalancing.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/service-discovery-and-loadbalancing.html">
2017-11-15 21:18:59 +08:00
<b>4.3.</b>
服务发现与负载均衡
2017-08-21 17:44:43 +08:00
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.3.1" data-path="../practice/traefik-ingress-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/traefik-ingress-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.3.1.</b>
安装Traefik ingress
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.3.2" data-path="../practice/distributed-load-test.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/distributed-load-test.html">
2017-11-15 21:18:59 +08:00
<b>4.3.2.</b>
分布式负载测试
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.3.3" data-path="../practice/network-and-cluster-perfermance-test.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/network-and-cluster-perfermance-test.html">
2017-11-15 21:18:59 +08:00
<b>4.3.3.</b>
网络和集群性能测试
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.3.4" data-path="../practice/edge-node-configuration.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/edge-node-configuration.html">
2017-11-15 21:18:59 +08:00
<b>4.3.4.</b>
边缘节点配置
2017-08-21 17:44:43 +08:00
</a>
2017-10-27 19:09:01 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.3.5" data-path="../practice/nginx-ingress-installation.html">
2017-10-27 19:09:01 +08:00
<a href="../practice/nginx-ingress-installation.html">
2017-11-15 21:18:59 +08:00
<b>4.3.5.</b>
安装Nginx ingress
2017-10-27 19:09:01 +08:00
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.4" data-path="../practice/operation.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/operation.html">
2017-11-15 21:18:59 +08:00
<b>4.4.</b>
运维管理
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</a>
<ul class="articles">
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<li class="chapter " data-level="4.4.1" data-path="../practice/service-rolling-update.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/service-rolling-update.html">
2017-11-15 21:18:59 +08:00
<b>4.4.1.</b>
服务滚动升级
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.4.2" data-path="../practice/app-log-collection.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/app-log-collection.html">
2017-11-15 21:18:59 +08:00
<b>4.4.2.</b>
应用日志收集
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.4.3" data-path="../practice/configuration-best-practice.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/configuration-best-practice.html">
2017-11-15 21:18:59 +08:00
<b>4.4.3.</b>
配置最佳实践
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.4.4" data-path="../practice/monitor.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/monitor.html">
2017-11-15 21:18:59 +08:00
<b>4.4.4.</b>
集群及应用监控
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.4.5" data-path="../practice/data-persistence-problem.html">
2017-08-21 17:44:43 +08:00
<a href="../practice/data-persistence-problem.html">
2017-11-15 21:18:59 +08:00
<b>4.4.5.</b>
数据持久化问题
2017-08-21 17:44:43 +08:00
</a>
2017-09-03 15:58:39 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.4.6" data-path="../practice/manage-compute-resources-container.html">
2017-09-03 15:58:39 +08:00
<a href="../practice/manage-compute-resources-container.html">
2017-11-15 21:18:59 +08:00
<b>4.4.6.</b>
管理容器的计算资源
2017-09-03 15:58:39 +08:00
</a>
</li>
2017-11-09 10:55:38 +08:00
</ul>
2017-11-09 10:55:38 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.5" data-path="../practice/storage.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/storage.html">
2017-11-15 21:18:59 +08:00
<b>4.5.</b>
存储管理
2017-11-09 10:55:38 +08:00
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.5.1" data-path="../practice/glusterfs.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/glusterfs.html">
2017-11-15 21:18:59 +08:00
<b>4.5.1.</b>
GlusterFS
2017-11-09 10:55:38 +08:00
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.5.1.1" data-path="../practice/using-glusterfs-for-persistent-storage.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/using-glusterfs-for-persistent-storage.html">
2017-11-15 21:18:59 +08:00
<b>4.5.1.1.</b>
使用GlusterFS做持久化存储
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.5.1.2" data-path="../practice/storage-for-containers-using-glusterfs-with-openshift.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/storage-for-containers-using-glusterfs-with-openshift.html">
2017-11-15 21:18:59 +08:00
<b>4.5.1.2.</b>
在OpenShift中使用GlusterFS做持久化存储
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.5.2" data-path="../practice/cephfs.html">
2017-08-21 17:44:43 +08:00
2017-11-09 10:55:38 +08:00
<a href="../practice/cephfs.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>4.5.2.</b>
CephFS
2017-08-21 17:44:43 +08:00
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.5.2.1" data-path="../practice/using-ceph-for-persistent-storage.html">
2017-08-21 17:44:43 +08:00
2017-11-09 10:55:38 +08:00
<a href="../practice/using-ceph-for-persistent-storage.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>4.5.2.1.</b>
使用Ceph做持久化存储
2017-11-09 10:55:38 +08:00
</a>
</li>
</ul>
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.6" data-path="../practice/monitoring.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/monitoring.html">
2017-11-15 21:18:59 +08:00
<b>4.6.</b>
集群与应用监控
2017-08-21 17:44:43 +08:00
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.6.1" data-path="../practice/heapster.html">
2017-08-21 17:44:43 +08:00
2017-11-09 10:55:38 +08:00
<a href="../practice/heapster.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>4.6.1.</b>
Heapster
2017-08-21 17:44:43 +08:00
</a>
2017-11-09 10:55:38 +08:00
<ul class="articles">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.6.1.1" data-path="../practice/using-heapster-to-get-object-metrics.html">
2017-08-21 17:44:43 +08:00
2017-11-09 10:55:38 +08:00
<a href="../practice/using-heapster-to-get-object-metrics.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>4.6.1.1.</b>
使用Heapster获取集群和对象的metric数据
2017-08-21 17:44:43 +08:00
</a>
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.6.2" data-path="../practice/prometheus.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/prometheus.html">
2017-11-15 21:18:59 +08:00
<b>4.6.2.</b>
Prometheus
</a>
<ul class="articles">
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.6.2.1" data-path="../practice/using-prometheus-to-monitor-kuberentes-cluster.html">
2017-11-09 10:55:38 +08:00
<a href="../practice/using-prometheus-to-monitor-kuberentes-cluster.html">
2017-11-15 21:18:59 +08:00
<b>4.6.2.1.</b>
使用Prometheus监控kubernetes集群
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
</ul>
2017-10-19 15:31:08 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="4.7" data-path="../practice/services-management-tool.html">
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<a href="../practice/services-management-tool.html">
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<b>4.7.</b>
服务编排管理
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</a>
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<ul class="articles">
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<li class="chapter " data-level="4.7.1" data-path="../practice/helm.html">
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<a href="../practice/helm.html">
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<b>4.7.1.</b>
使用Helm管理kubernetes应用
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</a>
2017-10-27 11:59:37 +08:00
</li>
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<li class="chapter " data-level="4.7.2" data-path="../practice/create-private-charts-repo.html">
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<a href="../practice/create-private-charts-repo.html">
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<b>4.7.2.</b>
构建私有Chart仓库
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</a>
</li>
</ul>
</li>
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<li class="chapter " data-level="4.8" data-path="../practice/ci-cd.html">
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<a href="../practice/ci-cd.html">
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<b>4.8.</b>
持续集成与发布
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</a>
<ul class="articles">
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<li class="chapter " data-level="4.8.1" data-path="../practice/jenkins-ci-cd.html">
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<a href="../practice/jenkins-ci-cd.html">
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<b>4.8.1.</b>
使用Jenkins进行持续集成与发布
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</a>
</li>
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<li class="chapter " data-level="4.8.2" data-path="../practice/drone-ci-cd.html">
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<a href="../practice/drone-ci-cd.html">
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<b>4.8.2.</b>
使用Drone进行持续集成与发布
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</a>
2017-11-02 16:33:01 +08:00
</li>
</ul>
</li>
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<li class="chapter " data-level="4.9" data-path="../practice/update-and-upgrade.html">
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<a href="../practice/update-and-upgrade.html">
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<b>4.9.</b>
更新与升级
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</a>
<ul class="articles">
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<li class="chapter " data-level="4.9.1" data-path="../practice/manually-upgrade.html">
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<a href="../practice/manually-upgrade.html">
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<b>4.9.1.</b>
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手动升级kubernetes集群
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</a>
</li>
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<li class="chapter " data-level="4.9.2" data-path="../practice/dashboard-upgrade.html">
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<a href="../practice/dashboard-upgrade.html">
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<b>4.9.2.</b>
升级dashboard
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</a>
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</li>
</ul>
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</li>
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<li class="header">领域应用</li>
<li class="chapter " data-level="5.1" data-path="../usecases/">
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<a href="../usecases/">
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<b>5.1.</b>
领域应用概览
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</a>
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</li>
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.2" data-path="../usecases/microservices.html">
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<a href="../usecases/microservices.html">
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<b>5.2.</b>
微服务架构
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</a>
<ul class="articles">
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<li class="chapter " data-level="5.2.1" data-path="../usecases/service-discovery-in-microservices.html">
2017-09-20 21:55:19 +08:00
<a href="../usecases/service-discovery-in-microservices.html">
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<b>5.2.1.</b>
微服务中的服务发现
2017-09-20 21:55:19 +08:00
</a>
</li>
</ul>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.3" data-path="../usecases/service-mesh.html">
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<a href="../usecases/service-mesh.html">
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<b>5.3.</b>
Service Mesh 服务网格
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</a>
<ul class="articles">
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<li class="chapter " data-level="5.3.1" data-path="../usecases/istio.html">
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<a href="../usecases/istio.html">
2017-11-15 21:18:59 +08:00
<b>5.3.1.</b>
Istio
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</a>
<ul class="articles">
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<li class="chapter " data-level="5.3.1.1" data-path="../usecases/istio-installation.html">
2017-08-21 17:44:43 +08:00
<a href="../usecases/istio-installation.html">
2017-11-15 21:18:59 +08:00
<b>5.3.1.1.</b>
安装并试用Istio service mesh
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.3.1.2" data-path="../usecases/configuring-request-routing.html">
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<a href="../usecases/configuring-request-routing.html">
2017-11-15 21:18:59 +08:00
<b>5.3.1.2.</b>
配置请求的路由规则
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</a>
2017-11-07 23:57:26 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.3.1.3" data-path="../usecases/install-and-expand-istio-mesh.html">
2017-11-07 23:57:26 +08:00
<a href="../usecases/install-and-expand-istio-mesh.html">
2017-11-15 21:18:59 +08:00
<b>5.3.1.3.</b>
安装和拓展Istio service mesh
2017-11-07 23:57:26 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.3.1.4" data-path="../usecases/integrating-vms.html">
2017-11-07 23:57:26 +08:00
<a href="../usecases/integrating-vms.html">
2017-11-15 21:18:59 +08:00
<b>5.3.1.4.</b>
集成虚拟机
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</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
</li>
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<li class="chapter " data-level="5.3.2" data-path="../usecases/linkerd.html">
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<a href="../usecases/linkerd.html">
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<b>5.3.2.</b>
Linkerd
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</a>
<ul class="articles">
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<li class="chapter " data-level="5.3.2.1" data-path="../usecases/linkerd-user-guide.html">
2017-08-21 17:44:43 +08:00
<a href="../usecases/linkerd-user-guide.html">
2017-11-15 21:18:59 +08:00
<b>5.3.2.1.</b>
Linkerd 使用指南
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</a>
</li>
</ul>
</li>
</ul>
</li>
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<li class="chapter " data-level="5.4" data-path="../usecases/big-data.html">
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<a href="../usecases/big-data.html">
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<b>5.4.</b>
大数据
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</a>
<ul class="articles">
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<li class="chapter " data-level="5.4.1" data-path="../usecases/spark-standalone-on-kubernetes.html">
2017-08-21 17:44:43 +08:00
2017-08-30 14:20:52 +08:00
<a href="../usecases/spark-standalone-on-kubernetes.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>5.4.1.</b>
Spark standalone on Kubernetes
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</a>
2017-08-31 14:23:44 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.4.2" data-path="../usecases/running-spark-with-kubernetes-native-scheduler.html">
2017-08-31 14:23:44 +08:00
2017-09-14 15:57:50 +08:00
<a href="../usecases/running-spark-with-kubernetes-native-scheduler.html">
2017-08-31 14:23:44 +08:00
2017-11-15 21:18:59 +08:00
<b>5.4.2.</b>
运行支持kubernetes原生调度的Spark程序
2017-08-31 14:23:44 +08:00
</a>
2017-08-21 17:44:43 +08:00
</li>
</ul>
2017-08-30 16:52:33 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.5" data-path="../usecases/serverless.html">
2017-08-30 16:52:33 +08:00
<a href="../usecases/serverless.html">
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<b>5.5.</b>
Serverless架构
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</a>
2017-11-23 11:03:04 +08:00
<ul class="articles">
<li class="chapter " data-level="5.5.1" data-path="../usecases/understanding-serverless.html">
<a href="../usecases/understanding-serverless.html">
<b>5.5.1.</b>
理解Serverless
</a>
</li>
</ul>
2017-10-27 19:09:01 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="5.6" data-path="../usecases/edge-computing.html">
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<a href="../usecases/edge-computing.html">
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<b>5.6.</b>
边缘计算
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</a>
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</li>
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<li class="header">开发指南</li>
<li class="chapter " data-level="6.1" data-path="../develop/">
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<a href="../develop/">
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<b>6.1.</b>
开发指南概览
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</a>
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</li>
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="6.2" data-path="../develop/developing-environment.html">
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<a href="../develop/developing-environment.html">
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<b>6.2.</b>
开发环境搭建
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</a>
</li>
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<li class="chapter " data-level="6.3" data-path="../develop/testing.html">
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<a href="../develop/testing.html">
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<b>6.3.</b>
单元测试和集成测试
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</a>
</li>
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<li class="chapter " data-level="6.4" data-path="../develop/client-go-sample.html">
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<a href="../develop/client-go-sample.html">
2017-11-15 21:18:59 +08:00
<b>6.4.</b>
client-go示例
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</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="6.5" data-path="../develop/contribute.html">
2017-08-21 17:44:43 +08:00
<a href="../develop/contribute.html">
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<b>6.5.</b>
社区贡献
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</a>
2017-10-23 19:09:41 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="6.6" data-path="../develop/minikube.html">
2017-10-23 19:09:41 +08:00
<a href="../develop/minikube.html">
2017-11-15 21:18:59 +08:00
<b>6.6.</b>
Minikube
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</a>
2017-08-21 17:44:43 +08:00
</li>
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<li class="header">附录</li>
<li class="chapter " data-level="7.1" data-path="../appendix/">
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<a href="../appendix/">
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<b>7.1.</b>
附录说明
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</a>
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</li>
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="7.2" data-path="../appendix/debug-kubernetes-services.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<a href="../appendix/debug-kubernetes-services.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>7.2.</b>
Kubernetes中的应用故障排查
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="7.3" data-path="../appendix/material-share.html">
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2017-11-15 21:18:59 +08:00
<a href="../appendix/material-share.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>7.3.</b>
Kubernetes相关资讯和情报链接
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="7.4" data-path="../appendix/docker-best-practice.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<a href="../appendix/docker-best-practice.html">
2017-08-21 17:44:43 +08:00
2017-11-15 21:18:59 +08:00
<b>7.4.</b>
Docker最佳实践
2017-08-21 17:44:43 +08:00
</a>
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="7.5" data-path="../appendix/tricks.html">
2017-11-15 21:18:59 +08:00
<a href="../appendix/tricks.html">
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<b>7.5.</b>
使用技巧
</a>
2017-10-18 14:16:55 +08:00
</li>
2017-11-15 21:18:59 +08:00
<li class="chapter " data-level="7.6" data-path="../appendix/issues.html">
2017-10-18 14:16:55 +08:00
2017-11-15 21:18:59 +08:00
<a href="../appendix/issues.html">
2017-10-18 14:16:55 +08:00
2017-11-15 21:18:59 +08:00
<b>7.6.</b>
问题记录
2017-10-18 14:16:55 +08:00
</a>
2017-08-21 17:44:43 +08:00
</li>
<li class="divider"></li>
<li>
<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
2017-09-19 22:01:07 +08:00
本书使用 GitBook 发布
2017-08-21 17:44:43 +08:00
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<a href=".." >Service</a>
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<h1 id="service">Service</h1>
<p>Kubernetes <a href="https://kubernetes.io/docs/user-guide/pods" target="_blank"><code>Pod</code></a> &#x662F;&#x6709;&#x751F;&#x547D;&#x5468;&#x671F;&#x7684;&#xFF0C;&#x5B83;&#x4EEC;&#x53EF;&#x4EE5;&#x88AB;&#x521B;&#x5EFA;&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x88AB;&#x9500;&#x6BC1;&#xFF0C;&#x7136;&#x800C;&#x4E00;&#x65E6;&#x88AB;&#x9500;&#x6BC1;&#x751F;&#x547D;&#x5C31;&#x6C38;&#x8FDC;&#x7ED3;&#x675F;&#x3002;
&#x901A;&#x8FC7; <a href="https://kubernetes.io/docs/user-guide/replication-controller" target="_blank"><code>ReplicationController</code></a> &#x80FD;&#x591F;&#x52A8;&#x6001;&#x5730;&#x521B;&#x5EFA;&#x548C;&#x9500;&#x6BC1; <code>Pod</code>&#xFF08;&#x4F8B;&#x5982;&#xFF0C;&#x9700;&#x8981;&#x8FDB;&#x884C;&#x6269;&#x7F29;&#x5BB9;&#xFF0C;&#x6216;&#x8005;&#x6267;&#x884C; <a href="https://kubernetes.io/docs/user-guide/kubectl/v1.7/#rolling-update" target="_blank">&#x6EDA;&#x52A8;&#x5347;&#x7EA7;</a>&#xFF09;&#x3002;
&#x6BCF;&#x4E2A; <code>Pod</code> &#x90FD;&#x4F1A;&#x83B7;&#x53D6;&#x5B83;&#x81EA;&#x5DF1;&#x7684; IP &#x5730;&#x5740;&#xFF0C;&#x5373;&#x4F7F;&#x8FD9;&#x4E9B; IP &#x5730;&#x5740;&#x4E0D;&#x603B;&#x662F;&#x7A33;&#x5B9A;&#x53EF;&#x4F9D;&#x8D56;&#x7684;&#x3002;
&#x8FD9;&#x4F1A;&#x5BFC;&#x81F4;&#x4E00;&#x4E2A;&#x95EE;&#x9898;&#xFF1A;&#x5728; Kubernetes &#x96C6;&#x7FA4;&#x4E2D;&#xFF0C;&#x5982;&#x679C;&#x4E00;&#x7EC4; <code>Pod</code>&#xFF08;&#x79F0;&#x4E3A; backend&#xFF09;&#x4E3A;&#x5176;&#x5B83; <code>Pod</code> &#xFF08;&#x79F0;&#x4E3A; frontend&#xFF09;&#x63D0;&#x4F9B;&#x670D;&#x52A1;&#xFF0C;&#x90A3;&#x4E48;&#x90A3;&#x4E9B; frontend &#x8BE5;&#x5982;&#x4F55;&#x53D1;&#x73B0;&#xFF0C;&#x5E76;&#x8FDE;&#x63A5;&#x5230;&#x8FD9;&#x7EC4; <code>Pod</code> &#x4E2D;&#x7684;&#x54EA;&#x4E9B; backend &#x5462;&#xFF1F;</p>
<p>&#x5173;&#x4E8E; <code>Service</code></p>
<p>Kubernetes <code>Service</code> &#x5B9A;&#x4E49;&#x4E86;&#x8FD9;&#x6837;&#x4E00;&#x79CD;&#x62BD;&#x8C61;&#xFF1A;&#x4E00;&#x4E2A; <code>Pod</code> &#x7684;&#x903B;&#x8F91;&#x5206;&#x7EC4;&#xFF0C;&#x4E00;&#x79CD;&#x53EF;&#x4EE5;&#x8BBF;&#x95EE;&#x5B83;&#x4EEC;&#x7684;&#x7B56;&#x7565; &#x2014;&#x2014; &#x901A;&#x5E38;&#x79F0;&#x4E3A;&#x5FAE;&#x670D;&#x52A1;&#x3002;
&#x8FD9;&#x4E00;&#x7EC4; <code>Pod</code> &#x80FD;&#x591F;&#x88AB; <code>Service</code> &#x8BBF;&#x95EE;&#x5230;&#xFF0C;&#x901A;&#x5E38;&#x662F;&#x901A;&#x8FC7; <a href="https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors" target="_blank"><code>Label Selector</code></a>&#xFF08;&#x67E5;&#x770B;&#x4E0B;&#x9762;&#x4E86;&#x89E3;&#xFF0C;&#x4E3A;&#x4EC0;&#x4E48;&#x53EF;&#x80FD;&#x9700;&#x8981;&#x6CA1;&#x6709; selector &#x7684; <code>Service</code>&#xFF09;&#x5B9E;&#x73B0;&#x7684;&#x3002;</p>
<p>&#x4E3E;&#x4E2A;&#x4F8B;&#x5B50;&#xFF0C;&#x8003;&#x8651;&#x4E00;&#x4E2A;&#x56FE;&#x7247;&#x5904;&#x7406; backend&#xFF0C;&#x5B83;&#x8FD0;&#x884C;&#x4E86;3&#x4E2A;&#x526F;&#x672C;&#x3002;&#x8FD9;&#x4E9B;&#x526F;&#x672C;&#x662F;&#x53EF;&#x4E92;&#x6362;&#x7684; &#x2014;&#x2014; frontend &#x4E0D;&#x9700;&#x8981;&#x5173;&#x5FC3;&#x5B83;&#x4EEC;&#x8C03;&#x7528;&#x4E86;&#x54EA;&#x4E2A; backend &#x526F;&#x672C;&#x3002;
&#x7136;&#x800C;&#x7EC4;&#x6210;&#x8FD9;&#x4E00;&#x7EC4; backend &#x7A0B;&#x5E8F;&#x7684; <code>Pod</code> &#x5B9E;&#x9645;&#x4E0A;&#x53EF;&#x80FD;&#x4F1A;&#x53D1;&#x751F;&#x53D8;&#x5316;&#xFF0C;frontend &#x5BA2;&#x6237;&#x7AEF;&#x4E0D;&#x5E94;&#x8BE5;&#x4E5F;&#x6CA1;&#x5FC5;&#x8981;&#x77E5;&#x9053;&#xFF0C;&#x800C;&#x4E14;&#x4E5F;&#x4E0D;&#x9700;&#x8981;&#x8DDF;&#x8E2A;&#x8FD9;&#x4E00;&#x7EC4; backend &#x7684;&#x72B6;&#x6001;&#x3002;
<code>Service</code> &#x5B9A;&#x4E49;&#x7684;&#x62BD;&#x8C61;&#x80FD;&#x591F;&#x89E3;&#x8026;&#x8FD9;&#x79CD;&#x5173;&#x8054;&#x3002;</p>
<p>&#x5BF9; Kubernetes &#x96C6;&#x7FA4;&#x4E2D;&#x7684;&#x5E94;&#x7528;&#xFF0C;Kubernetes &#x63D0;&#x4F9B;&#x4E86;&#x7B80;&#x5355;&#x7684; <code>Endpoints</code> API&#xFF0C;&#x53EA;&#x8981; <code>Service</code> &#x4E2D;&#x7684;&#x4E00;&#x7EC4; <code>Pod</code> &#x53D1;&#x751F;&#x53D8;&#x66F4;&#xFF0C;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5C31;&#x4F1A;&#x88AB;&#x66F4;&#x65B0;&#x3002;
&#x5BF9;&#x975E; Kubernetes &#x96C6;&#x7FA4;&#x4E2D;&#x7684;&#x5E94;&#x7528;&#xFF0C;Kubernetes &#x63D0;&#x4F9B;&#x4E86;&#x57FA;&#x4E8E; VIP &#x7684;&#x7F51;&#x6865;&#x7684;&#x65B9;&#x5F0F;&#x8BBF;&#x95EE; <code>Service</code>&#xFF0C;&#x518D;&#x7531; <code>Service</code> &#x91CD;&#x5B9A;&#x5411;&#x5230; backend <code>Pod</code>&#x3002;</p>
<h2 id="&#x5B9A;&#x4E49;-service">&#x5B9A;&#x4E49; Service</h2>
<p>&#x4E00;&#x4E2A; <code>Service</code> &#x5728; Kubernetes &#x4E2D;&#x662F;&#x4E00;&#x4E2A; REST &#x5BF9;&#x8C61;&#xFF0C;&#x548C; <code>Pod</code> &#x7C7B;&#x4F3C;&#x3002;
&#x50CF;&#x6240;&#x6709;&#x7684; REST &#x5BF9;&#x8C61;&#x4E00;&#x6837;&#xFF0C; <code>Service</code> &#x5B9A;&#x4E49;&#x53EF;&#x4EE5;&#x57FA;&#x4E8E; POST &#x65B9;&#x5F0F;&#xFF0C;&#x8BF7;&#x6C42; apiserver &#x521B;&#x5EFA;&#x65B0;&#x7684;&#x5B9E;&#x4F8B;&#x3002;
&#x4F8B;&#x5982;&#xFF0C;&#x5047;&#x5B9A;&#x6709;&#x4E00;&#x7EC4; <code>Pod</code>&#xFF0C;&#x5B83;&#x4EEC;&#x5BF9;&#x5916;&#x66B4;&#x9732;&#x4E86; 9376 &#x7AEF;&#x53E3;&#xFF0C;&#x540C;&#x65F6;&#x8FD8;&#x88AB;&#x6253;&#x4E0A; <code>&quot;app=MyApp&quot;</code> &#x6807;&#x7B7E;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> selector:</span>
<span class="hljs-attr"> app:</span> MyApp
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9376</span>
</code></pre>
<p>&#x4E0A;&#x8FF0;&#x914D;&#x7F6E;&#x5C06;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#x4E3A; &#x201C;my-service&#x201D; &#x7684; <code>Service</code> &#x5BF9;&#x8C61;&#xFF0C;&#x5B83;&#x4F1A;&#x5C06;&#x8BF7;&#x6C42;&#x4EE3;&#x7406;&#x5230;&#x4F7F;&#x7528; TCP &#x7AEF;&#x53E3; 9376&#xFF0C;&#x5E76;&#x4E14;&#x5177;&#x6709;&#x6807;&#x7B7E; <code>&quot;app=MyApp&quot;</code> &#x7684; <code>Pod</code> &#x4E0A;&#x3002;
&#x8FD9;&#x4E2A; <code>Service</code> &#x5C06;&#x88AB;&#x6307;&#x6D3E;&#x4E00;&#x4E2A; IP &#x5730;&#x5740;&#xFF08;&#x901A;&#x5E38;&#x79F0;&#x4E3A; &#x201C;Cluster IP&#x201D;&#xFF09;&#xFF0C;&#x5B83;&#x4F1A;&#x88AB;&#x670D;&#x52A1;&#x7684;&#x4EE3;&#x7406;&#x4F7F;&#x7528;&#xFF08;&#x89C1;&#x4E0B;&#x9762;&#xFF09;&#x3002;
&#x8BE5; <code>Service</code> &#x7684; selector &#x5C06;&#x4F1A;&#x6301;&#x7EED;&#x8BC4;&#x4F30;&#xFF0C;&#x5904;&#x7406;&#x7ED3;&#x679C;&#x5C06;&#x88AB; POST &#x5230;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#x4E3A; &#x201C;my-service&#x201D; &#x7684; <code>Endpoints</code> &#x5BF9;&#x8C61;&#x4E0A;&#x3002;</p>
<p>&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x662F;&#xFF0C; <code>Service</code> &#x80FD;&#x591F;&#x5C06;&#x4E00;&#x4E2A;&#x63A5;&#x6536;&#x7AEF;&#x53E3;&#x6620;&#x5C04;&#x5230;&#x4EFB;&#x610F;&#x7684; <code>targetPort</code>&#x3002;
&#x9ED8;&#x8BA4;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;<code>targetPort</code> &#x5C06;&#x88AB;&#x8BBE;&#x7F6E;&#x4E3A;&#x4E0E; <code>port</code> &#x5B57;&#x6BB5;&#x76F8;&#x540C;&#x7684;&#x503C;&#x3002;
&#x53EF;&#x80FD;&#x66F4;&#x6709;&#x8DA3;&#x7684;&#x662F;&#xFF0C;<code>targetPort</code> &#x53EF;&#x4EE5;&#x662F;&#x4E00;&#x4E2A;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x5F15;&#x7528;&#x4E86; backend <code>Pod</code> &#x7684;&#x4E00;&#x4E2A;&#x7AEF;&#x53E3;&#x7684;&#x540D;&#x79F0;&#x3002;
&#x4F46;&#x662F;&#xFF0C;&#x5B9E;&#x9645;&#x6307;&#x6D3E;&#x7ED9;&#x8BE5;&#x7AEF;&#x53E3;&#x540D;&#x79F0;&#x7684;&#x7AEF;&#x53E3;&#x53F7;&#xFF0C;&#x5728;&#x6BCF;&#x4E2A; backend <code>Pod</code> &#x4E2D;&#x53EF;&#x80FD;&#x5E76;&#x4E0D;&#x76F8;&#x540C;&#x3002;
&#x5BF9;&#x4E8E;&#x90E8;&#x7F72;&#x548C;&#x8BBE;&#x8BA1; <code>Service</code> &#xFF0C;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#x4F1A;&#x63D0;&#x4F9B;&#x66F4;&#x5927;&#x7684;&#x7075;&#x6D3B;&#x6027;&#x3002;
&#x4F8B;&#x5982;&#xFF0C;&#x53EF;&#x4EE5;&#x5728; backend &#x8F6F;&#x4EF6;&#x4E0B;&#x4E00;&#x4E2A;&#x7248;&#x672C;&#x4E2D;&#xFF0C;&#x4FEE;&#x6539; Pod &#x66B4;&#x9732;&#x7684;&#x7AEF;&#x53E3;&#xFF0C;&#x5E76;&#x4E0D;&#x4F1A;&#x4E2D;&#x65AD;&#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x8C03;&#x7528;&#x3002;</p>
<p>Kubernetes <code>Service</code> &#x80FD;&#x591F;&#x652F;&#x6301; <code>TCP</code> &#x548C; <code>UDP</code> &#x534F;&#x8BAE;&#xFF0C;&#x9ED8;&#x8BA4; <code>TCP</code> &#x534F;&#x8BAE;&#x3002; </p>
<h3 id="&#x6CA1;&#x6709;-selector-&#x7684;-service">&#x6CA1;&#x6709; selector &#x7684; Service</h3>
<p>Servcie &#x62BD;&#x8C61;&#x4E86;&#x8BE5;&#x5982;&#x4F55;&#x8BBF;&#x95EE; Kubernetes <code>Pod</code>&#xFF0C;&#x4F46;&#x4E5F;&#x80FD;&#x591F;&#x62BD;&#x8C61;&#x5176;&#x5B83;&#x7C7B;&#x578B;&#x7684; backend&#xFF0C;&#x4F8B;&#x5982;&#xFF1A;</p>
<ul>
<li>&#x5E0C;&#x671B;&#x5728;&#x751F;&#x4EA7;&#x73AF;&#x5883;&#x4E2D;&#x4F7F;&#x7528;&#x5916;&#x90E8;&#x7684;&#x6570;&#x636E;&#x5E93;&#x96C6;&#x7FA4;&#xFF0C;&#x4F46;&#x6D4B;&#x8BD5;&#x73AF;&#x5883;&#x4F7F;&#x7528;&#x81EA;&#x5DF1;&#x7684;&#x6570;&#x636E;&#x5E93;&#x3002;</li>
<li>&#x5E0C;&#x671B;&#x670D;&#x52A1;&#x6307;&#x5411;&#x53E6;&#x4E00;&#x4E2A; <a href="https://kubernetes.io/docs/user-guide/namespaces" target="_blank"><code>Namespace</code></a> &#x4E2D;&#x6216;&#x5176;&#x5B83;&#x96C6;&#x7FA4;&#x4E2D;&#x7684;&#x670D;&#x52A1;&#x3002;</li>
<li>&#x6B63;&#x5728;&#x5C06;&#x5DE5;&#x4F5C;&#x8D1F;&#x8F7D;&#x8F6C;&#x79FB;&#x5230; Kubernetes &#x96C6;&#x7FA4;&#xFF0C;&#x548C;&#x8FD0;&#x884C;&#x5728; Kubernetes &#x96C6;&#x7FA4;&#x4E4B;&#x5916;&#x7684; backend&#x3002;</li>
</ul>
<p>&#x5728;&#x4EFB;&#x4F55;&#x8FD9;&#x4E9B;&#x573A;&#x666F;&#x4E2D;&#xFF0C;&#x90FD;&#x80FD;&#x591F;&#x5B9A;&#x4E49;&#x6CA1;&#x6709; selector &#x7684; <code>Service</code> &#xFF1A;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9376</span>
</code></pre>
<p>&#x7531;&#x4E8E;&#x8FD9;&#x4E2A; <code>Service</code> &#x6CA1;&#x6709; selector&#xFF0C;&#x5C31;&#x4E0D;&#x4F1A;&#x521B;&#x5EFA;&#x76F8;&#x5173;&#x7684; <code>Endpoints</code> &#x5BF9;&#x8C61;&#x3002;&#x53EF;&#x4EE5;&#x624B;&#x52A8;&#x5C06; <code>Service</code> &#x6620;&#x5C04;&#x5230;&#x6307;&#x5B9A;&#x7684; <code>Endpoints</code>&#xFF1A;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Endpoints
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr">subsets:</span>
<span class="hljs-attr"> - addresses:</span>
<span class="hljs-attr"> - ip:</span> <span class="hljs-number">1.2</span><span class="hljs-number">.3</span><span class="hljs-number">.4</span>
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - port:</span> <span class="hljs-number">9376</span>
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF1A;Endpoint IP &#x5730;&#x5740;&#x4E0D;&#x80FD;&#x662F; loopback&#xFF08;127.0.0.0/8&#xFF09;&#x3001; link-local&#xFF08;169.254.0.0/16&#xFF09;&#x3001;&#x6216;&#x8005; link-local &#x591A;&#x64AD;&#xFF08;224.0.0.0/24&#xFF09;&#x3002;</p>
<p>&#x8BBF;&#x95EE;&#x6CA1;&#x6709; selector &#x7684; <code>Service</code>&#xFF0C;&#x4E0E;&#x6709; selector &#x7684; <code>Service</code> &#x7684;&#x539F;&#x7406;&#x76F8;&#x540C;&#x3002;&#x8BF7;&#x6C42;&#x5C06;&#x88AB;&#x8DEF;&#x7531;&#x5230;&#x7528;&#x6237;&#x5B9A;&#x4E49;&#x7684; Endpoint&#xFF08;&#x8BE5;&#x793A;&#x4F8B;&#x4E2D;&#x4E3A; <code>1.2.3.4:9376</code>&#xFF09;&#x3002;</p>
<p>ExternalName <code>Service</code> &#x662F; <code>Service</code> &#x7684;&#x7279;&#x4F8B;&#xFF0C;&#x5B83;&#x6CA1;&#x6709; selector&#xFF0C;&#x4E5F;&#x6CA1;&#x6709;&#x5B9A;&#x4E49;&#x4EFB;&#x4F55;&#x7684;&#x7AEF;&#x53E3;&#x548C; Endpoint&#x3002;
&#x76F8;&#x53CD;&#x5730;&#xFF0C;&#x5BF9;&#x4E8E;&#x8FD0;&#x884C;&#x5728;&#x96C6;&#x7FA4;&#x5916;&#x90E8;&#x7684;&#x670D;&#x52A1;&#xFF0C;&#x5B83;&#x901A;&#x8FC7;&#x8FD4;&#x56DE;&#x8BE5;&#x5916;&#x90E8;&#x670D;&#x52A1;&#x7684;&#x522B;&#x540D;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#x6765;&#x63D0;&#x4F9B;&#x670D;&#x52A1;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr"> namespace:</span> prod
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> type:</span> ExternalName
<span class="hljs-attr"> externalName:</span> my.database.example.com
</code></pre>
<p>&#x5F53;&#x67E5;&#x8BE2;&#x4E3B;&#x673A; <code>my-service.prod.svc.CLUSTER</code>&#x65F6;&#xFF0C;&#x96C6;&#x7FA4;&#x7684; DNS &#x670D;&#x52A1;&#x5C06;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x503C;&#x4E3A; <code>my.database.example.com</code> &#x7684; <code>CNAME</code> &#x8BB0;&#x5F55;&#x3002;
&#x8BBF;&#x95EE;&#x8FD9;&#x4E2A;&#x670D;&#x52A1;&#x7684;&#x5DE5;&#x4F5C;&#x65B9;&#x5F0F;&#x4E0E;&#x5176;&#x5B83;&#x7684;&#x76F8;&#x540C;&#xFF0C;&#x552F;&#x4E00;&#x4E0D;&#x540C;&#x7684;&#x662F;&#x91CD;&#x5B9A;&#x5411;&#x53D1;&#x751F;&#x5728; DNS &#x5C42;&#xFF0C;&#x800C;&#x4E14;&#x4E0D;&#x4F1A;&#x8FDB;&#x884C;&#x4EE3;&#x7406;&#x6216;&#x8F6C;&#x53D1;&#x3002;
&#x5982;&#x679C;&#x540E;&#x7EED;&#x51B3;&#x5B9A;&#x8981;&#x5C06;&#x6570;&#x636E;&#x5E93;&#x8FC1;&#x79FB;&#x5230; Kubernetes &#x96C6;&#x7FA4;&#x4E2D;&#xFF0C;&#x53EF;&#x4EE5;&#x542F;&#x52A8;&#x5BF9;&#x5E94;&#x7684; Pod&#xFF0C;&#x589E;&#x52A0;&#x5408;&#x9002;&#x7684; Selector &#x6216; Endpoint&#xFF0C;&#x4FEE;&#x6539; <code>Service</code> &#x7684; <code>type</code>&#x3002;</p>
<h2 id="vip-&#x548C;-service-&#x4EE3;&#x7406;">VIP &#x548C; Service &#x4EE3;&#x7406;</h2>
<p>&#x5728; Kubernetes &#x96C6;&#x7FA4;&#x4E2D;&#xFF0C;&#x6BCF;&#x4E2A; Node &#x8FD0;&#x884C;&#x4E00;&#x4E2A; <code>kube-proxy</code> &#x8FDB;&#x7A0B;&#x3002;<code>kube-proxy</code> &#x8D1F;&#x8D23;&#x4E3A; <code>Service</code> &#x5B9E;&#x73B0;&#x4E86;&#x4E00;&#x79CD; VIP&#xFF08;&#x865A;&#x62DF; IP&#xFF09;&#x7684;&#x5F62;&#x5F0F;&#xFF0C;&#x800C;&#x4E0D;&#x662F; <code>ExternalName</code> &#x7684;&#x5F62;&#x5F0F;&#x3002;
&#x5728; Kubernetes v1.0 &#x7248;&#x672C;&#xFF0C;&#x4EE3;&#x7406;&#x5B8C;&#x5168;&#x5728; userspace&#x3002;&#x5728; Kubernetes v1.1 &#x7248;&#x672C;&#xFF0C;&#x65B0;&#x589E;&#x4E86; iptables &#x4EE3;&#x7406;&#xFF0C;&#x4F46;&#x5E76;&#x4E0D;&#x662F;&#x9ED8;&#x8BA4;&#x7684;&#x8FD0;&#x884C;&#x6A21;&#x5F0F;&#x3002;
&#x4ECE; Kubernetes v1.2 &#x8D77;&#xFF0C;&#x9ED8;&#x8BA4;&#x5C31;&#x662F; iptables &#x4EE3;&#x7406;&#x3002;</p>
<p>&#x5728; Kubernetes v1.0 &#x7248;&#x672C;&#xFF0C;<code>Service</code> &#x662F; &#x201C;4&#x5C42;&#x201D;&#xFF08;TCP/UDP over IP&#xFF09;&#x6982;&#x5FF5;&#x3002;
&#x5728; Kubernetes v1.1 &#x7248;&#x672C;&#xFF0C;&#x65B0;&#x589E;&#x4E86; <code>Ingress</code> API&#xFF08;beta &#x7248;&#xFF09;&#xFF0C;&#x7528;&#x6765;&#x8868;&#x793A; &#x201C;7&#x5C42;&#x201D;&#xFF08;HTTP&#xFF09;&#x670D;&#x52A1;&#x3002;</p>
<h3 id="userspace-&#x4EE3;&#x7406;&#x6A21;&#x5F0F;">userspace &#x4EE3;&#x7406;&#x6A21;&#x5F0F;</h3>
<p>&#x8FD9;&#x79CD;&#x6A21;&#x5F0F;&#xFF0C;kube-proxy &#x4F1A;&#x76D1;&#x89C6; Kubernetes master &#x5BF9; <code>Service</code> &#x5BF9;&#x8C61;&#x548C; <code>Endpoints</code> &#x5BF9;&#x8C61;&#x7684;&#x6DFB;&#x52A0;&#x548C;&#x79FB;&#x9664;&#x3002;
&#x5BF9;&#x6BCF;&#x4E2A; <code>Service</code>&#xFF0C;&#x5B83;&#x4F1A;&#x5728;&#x672C;&#x5730; Node &#x4E0A;&#x6253;&#x5F00;&#x4E00;&#x4E2A;&#x7AEF;&#x53E3;&#xFF08;&#x968F;&#x673A;&#x9009;&#x62E9;&#xFF09;&#x3002;
&#x4EFB;&#x4F55;&#x8FDE;&#x63A5;&#x5230;&#x201C;&#x4EE3;&#x7406;&#x7AEF;&#x53E3;&#x201D;&#x7684;&#x8BF7;&#x6C42;&#xFF0C;&#x90FD;&#x4F1A;&#x88AB;&#x4EE3;&#x7406;&#x5230; <code>Service</code> &#x7684;backend <code>Pods</code> &#x4E2D;&#x7684;&#x67D0;&#x4E2A;&#x4E0A;&#x9762;&#xFF08;&#x5982; <code>Endpoints</code> &#x6240;&#x62A5;&#x544A;&#x7684;&#x4E00;&#x6837;&#xFF09;&#x3002;
&#x4F7F;&#x7528;&#x54EA;&#x4E2A; backend <code>Pod</code>&#xFF0C;&#x662F;&#x57FA;&#x4E8E; <code>Service</code> &#x7684; <code>SessionAffinity</code> &#x6765;&#x786E;&#x5B9A;&#x7684;&#x3002;
&#x6700;&#x540E;&#xFF0C;&#x5B83;&#x5B89;&#x88C5; iptables &#x89C4;&#x5219;&#xFF0C;&#x6355;&#x83B7;&#x5230;&#x8FBE;&#x8BE5; <code>Service</code> &#x7684; <code>clusterIP</code>&#xFF08;&#x662F;&#x865A;&#x62DF; IP&#xFF09;&#x548C; <code>Port</code> &#x7684;&#x8BF7;&#x6C42;&#xFF0C;&#x5E76;&#x91CD;&#x5B9A;&#x5411;&#x5230;&#x4EE3;&#x7406;&#x7AEF;&#x53E3;&#xFF0C;&#x4EE3;&#x7406;&#x7AEF;&#x53E3;&#x518D;&#x4EE3;&#x7406;&#x8BF7;&#x6C42;&#x5230; backend <code>Pod</code>&#x3002;</p>
<p>&#x7F51;&#x7EDC;&#x8FD4;&#x56DE;&#x7684;&#x7ED3;&#x679C;&#x662F;&#xFF0C;&#x4EFB;&#x4F55;&#x5230;&#x8FBE; <code>Service</code> &#x7684; IP:Port &#x7684;&#x8BF7;&#x6C42;&#xFF0C;&#x90FD;&#x4F1A;&#x88AB;&#x4EE3;&#x7406;&#x5230;&#x4E00;&#x4E2A;&#x5408;&#x9002;&#x7684; backend&#xFF0C;&#x4E0D;&#x9700;&#x8981;&#x5BA2;&#x6237;&#x7AEF;&#x77E5;&#x9053;&#x5173;&#x4E8E; Kubernetes&#x3001;<code>Service</code>&#x3001;&#x6216; <code>Pod</code> &#x7684;&#x4EFB;&#x4F55;&#x4FE1;&#x606F;&#x3002;</p>
<p>&#x9ED8;&#x8BA4;&#x7684;&#x7B56;&#x7565;&#x662F;&#xFF0C;&#x901A;&#x8FC7; round-robin &#x7B97;&#x6CD5;&#x6765;&#x9009;&#x62E9; backend <code>Pod</code>&#x3002;
&#x5B9E;&#x73B0;&#x57FA;&#x4E8E;&#x5BA2;&#x6237;&#x7AEF; IP &#x7684;&#x4F1A;&#x8BDD;&#x4EB2;&#x548C;&#x6027;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x8BBE;&#x7F6E; <code>service.spec.sessionAffinity</code> &#x7684;&#x503C;&#x4E3A; <code>&quot;ClientIP&quot;</code> &#xFF08;&#x9ED8;&#x8BA4;&#x503C;&#x4E3A; <code>&quot;None&quot;</code>&#xFF09;&#x3002;</p>
2017-11-15 21:18:59 +08:00
<figure id="fig2.3.4.1"><img src="../images/services-userspace-overview.jpg" alt="userspace&#x4EE3;&#x7406;&#x6A21;&#x5F0F;&#x4E0B;Service&#x6982;&#x89C8;&#x56FE;"><figcaption>&#x56FE;&#x7247; - userspace&#x4EE3;&#x7406;&#x6A21;&#x5F0F;&#x4E0B;Service&#x6982;&#x89C8;&#x56FE;</figcaption></figure>
2017-08-21 17:44:43 +08:00
<h3 id="iptables-&#x4EE3;&#x7406;&#x6A21;&#x5F0F;">iptables &#x4EE3;&#x7406;&#x6A21;&#x5F0F;</h3>
<p>&#x8FD9;&#x79CD;&#x6A21;&#x5F0F;&#xFF0C;kube-proxy &#x4F1A;&#x76D1;&#x89C6; Kubernetes master &#x5BF9; <code>Service</code> &#x5BF9;&#x8C61;&#x548C; <code>Endpoints</code> &#x5BF9;&#x8C61;&#x7684;&#x6DFB;&#x52A0;&#x548C;&#x79FB;&#x9664;&#x3002;
&#x5BF9;&#x6BCF;&#x4E2A; <code>Service</code>&#xFF0C;&#x5B83;&#x4F1A;&#x5B89;&#x88C5; iptables &#x89C4;&#x5219;&#xFF0C;&#x4ECE;&#x800C;&#x6355;&#x83B7;&#x5230;&#x8FBE;&#x8BE5; <code>Service</code> &#x7684; <code>clusterIP</code>&#xFF08;&#x865A;&#x62DF; IP&#xFF09;&#x548C;&#x7AEF;&#x53E3;&#x7684;&#x8BF7;&#x6C42;&#xFF0C;&#x8FDB;&#x800C;&#x5C06;&#x8BF7;&#x6C42;&#x91CD;&#x5B9A;&#x5411;&#x5230; <code>Service</code> &#x7684;&#x4E00;&#x7EC4; backend &#x4E2D;&#x7684;&#x67D0;&#x4E2A;&#x4E0A;&#x9762;&#x3002;
&#x5BF9;&#x4E8E;&#x6BCF;&#x4E2A; <code>Endpoints</code> &#x5BF9;&#x8C61;&#xFF0C;&#x5B83;&#x4E5F;&#x4F1A;&#x5B89;&#x88C5; iptables &#x89C4;&#x5219;&#xFF0C;&#x8FD9;&#x4E2A;&#x89C4;&#x5219;&#x4F1A;&#x9009;&#x62E9;&#x4E00;&#x4E2A; backend <code>Pod</code>&#x3002;</p>
<p>&#x9ED8;&#x8BA4;&#x7684;&#x7B56;&#x7565;&#x662F;&#xFF0C;&#x968F;&#x673A;&#x9009;&#x62E9;&#x4E00;&#x4E2A; backend&#x3002;
&#x5B9E;&#x73B0;&#x57FA;&#x4E8E;&#x5BA2;&#x6237;&#x7AEF; IP &#x7684;&#x4F1A;&#x8BDD;&#x4EB2;&#x548C;&#x6027;&#xFF0C;&#x53EF;&#x4EE5;&#x5C06; <code>service.spec.sessionAffinity</code> &#x7684;&#x503C;&#x8BBE;&#x7F6E;&#x4E3A; <code>&quot;ClientIP&quot;</code> &#xFF08;&#x9ED8;&#x8BA4;&#x503C;&#x4E3A; <code>&quot;None&quot;</code>&#xFF09;&#x3002;</p>
<p>&#x548C; userspace &#x4EE3;&#x7406;&#x7C7B;&#x4F3C;&#xFF0C;&#x7F51;&#x7EDC;&#x8FD4;&#x56DE;&#x7684;&#x7ED3;&#x679C;&#x662F;&#xFF0C;&#x4EFB;&#x4F55;&#x5230;&#x8FBE; <code>Service</code> &#x7684; IP:Port &#x7684;&#x8BF7;&#x6C42;&#xFF0C;&#x90FD;&#x4F1A;&#x88AB;&#x4EE3;&#x7406;&#x5230;&#x4E00;&#x4E2A;&#x5408;&#x9002;&#x7684; backend&#xFF0C;&#x4E0D;&#x9700;&#x8981;&#x5BA2;&#x6237;&#x7AEF;&#x77E5;&#x9053;&#x5173;&#x4E8E; Kubernetes&#x3001;<code>Service</code>&#x3001;&#x6216; <code>Pod</code> &#x7684;&#x4EFB;&#x4F55;&#x4FE1;&#x606F;&#x3002;
&#x8FD9;&#x5E94;&#x8BE5;&#x6BD4; userspace &#x4EE3;&#x7406;&#x66F4;&#x5FEB;&#x3001;&#x66F4;&#x53EF;&#x9760;&#x3002;&#x7136;&#x800C;&#xFF0C;&#x4E0D;&#x50CF; userspace &#x4EE3;&#x7406;&#xFF0C;&#x5982;&#x679C;&#x521D;&#x59CB;&#x9009;&#x62E9;&#x7684; <code>Pod</code> &#x6CA1;&#x6709;&#x54CD;&#x5E94;&#xFF0C;iptables &#x4EE3;&#x7406;&#x80FD;&#x591F;&#x81EA;&#x52A8;&#x5730;&#x91CD;&#x8BD5;&#x53E6;&#x4E00;&#x4E2A; <code>Pod</code>&#xFF0C;&#x6240;&#x4EE5;&#x5B83;&#x9700;&#x8981;&#x4F9D;&#x8D56; <a href="https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/#defining-readiness-probes" target="_blank">readiness probes</a>&#x3002;</p>
2017-11-15 21:18:59 +08:00
<figure id="fig2.3.4.2"><img src="../images/services-iptables-overview.jpg" alt="iptables&#x4EE3;&#x7406;&#x6A21;&#x5F0F;&#x4E0B;Service&#x6982;&#x89C8;&#x56FE;"><figcaption>&#x56FE;&#x7247; - iptables&#x4EE3;&#x7406;&#x6A21;&#x5F0F;&#x4E0B;Service&#x6982;&#x89C8;&#x56FE;</figcaption></figure>
2017-08-21 17:44:43 +08:00
<h2 id="&#x591A;&#x7AEF;&#x53E3;-service">&#x591A;&#x7AEF;&#x53E3; Service</h2>
<p>&#x5F88;&#x591A; <code>Service</code> &#x9700;&#x8981;&#x66B4;&#x9732;&#x591A;&#x4E2A;&#x7AEF;&#x53E3;&#x3002;&#x5BF9;&#x4E8E;&#x8FD9;&#x79CD;&#x60C5;&#x51B5;&#xFF0C;Kubernetes &#x652F;&#x6301;&#x5728; <code>Service</code> &#x5BF9;&#x8C61;&#x4E2D;&#x5B9A;&#x4E49;&#x591A;&#x4E2A;&#x7AEF;&#x53E3;&#x3002;
&#x5F53;&#x4F7F;&#x7528;&#x591A;&#x4E2A;&#x7AEF;&#x53E3;&#x65F6;&#xFF0C;&#x5FC5;&#x987B;&#x7ED9;&#x51FA;&#x6240;&#x6709;&#x7684;&#x7AEF;&#x53E3;&#x7684;&#x540D;&#x79F0;&#xFF0C;&#x8FD9;&#x6837; Endpoint &#x5C31;&#x4E0D;&#x4F1A;&#x4EA7;&#x751F;&#x6B67;&#x4E49;&#xFF0C;&#x4F8B;&#x5982;&#xFF1A;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> selector:</span>
<span class="hljs-attr"> app:</span> MyApp
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - name:</span> http
<span class="hljs-attr"> protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9376</span>
<span class="hljs-attr"> - name:</span> https
<span class="hljs-attr"> protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">443</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9377</span>
</code></pre>
<h2 id="&#x9009;&#x62E9;&#x81EA;&#x5DF1;&#x7684;-ip-&#x5730;&#x5740;">&#x9009;&#x62E9;&#x81EA;&#x5DF1;&#x7684; IP &#x5730;&#x5740;</h2>
<p>&#x5728; <code>Service</code> &#x521B;&#x5EFA;&#x7684;&#x8BF7;&#x6C42;&#x4E2D;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x8BBE;&#x7F6E; <code>spec.clusterIP</code> &#x5B57;&#x6BB5;&#x6765;&#x6307;&#x5B9A;&#x81EA;&#x5DF1;&#x7684;&#x96C6;&#x7FA4; IP &#x5730;&#x5740;&#x3002;
&#x6BD4;&#x5982;&#xFF0C;&#x5E0C;&#x671B;&#x66FF;&#x6362;&#x4E00;&#x4E2A;&#x5DF2;&#x7ECF;&#x5DF2;&#x5B58;&#x5728;&#x7684; DNS &#x6761;&#x76EE;&#xFF0C;&#x6216;&#x8005;&#x9057;&#x7559;&#x7CFB;&#x7EDF;&#x5DF2;&#x7ECF;&#x914D;&#x7F6E;&#x4E86;&#x4E00;&#x4E2A;&#x56FA;&#x5B9A;&#x7684; IP &#x4E14;&#x5F88;&#x96BE;&#x91CD;&#x65B0;&#x914D;&#x7F6E;&#x3002;
&#x7528;&#x6237;&#x9009;&#x62E9;&#x7684; IP &#x5730;&#x5740;&#x5FC5;&#x987B;&#x5408;&#x6CD5;&#xFF0C;&#x5E76;&#x4E14;&#x8FD9;&#x4E2A; IP &#x5730;&#x5740;&#x5728; <code>service-cluster-ip-range</code> CIDR &#x8303;&#x56F4;&#x5185;&#xFF0C;&#x8FD9;&#x5BF9; API Server &#x6765;&#x8BF4;&#x662F;&#x901A;&#x8FC7;&#x4E00;&#x4E2A;&#x6807;&#x8BC6;&#x6765;&#x6307;&#x5B9A;&#x7684;&#x3002;
&#x5982;&#x679C; IP &#x5730;&#x5740;&#x4E0D;&#x5408;&#x6CD5;&#xFF0C;API Server &#x4F1A;&#x8FD4;&#x56DE; HTTP &#x72B6;&#x6001;&#x7801; 422&#xFF0C;&#x8868;&#x793A;&#x503C;&#x4E0D;&#x5408;&#x6CD5;&#x3002;</p>
<h3 id="&#x4E3A;&#x4F55;&#x4E0D;&#x4F7F;&#x7528;-round-robin-dns&#xFF1F;">&#x4E3A;&#x4F55;&#x4E0D;&#x4F7F;&#x7528; round-robin DNS&#xFF1F;</h3>
<p>&#x4E00;&#x4E2A;&#x4E0D;&#x65F6;&#x51FA;&#x73B0;&#x7684;&#x95EE;&#x9898;&#x662F;&#xFF0C;&#x4E3A;&#x4EC0;&#x4E48;&#x6211;&#x4EEC;&#x90FD;&#x4F7F;&#x7528; VIP &#x7684;&#x65B9;&#x5F0F;&#xFF0C;&#x800C;&#x4E0D;&#x4F7F;&#x7528;&#x6807;&#x51C6;&#x7684; round-robin DNS&#xFF0C;&#x6709;&#x5982;&#x4E0B;&#x51E0;&#x4E2A;&#x539F;&#x56E0;&#xFF1A;</p>
<ul>
<li>&#x957F;&#x4E45;&#x4EE5;&#x6765;&#xFF0C;DNS &#x5E93;&#x90FD;&#x6CA1;&#x80FD;&#x8BA4;&#x771F;&#x5BF9;&#x5F85; DNS TTL&#x3001;&#x7F13;&#x5B58;&#x57DF;&#x540D;&#x67E5;&#x8BE2;&#x7ED3;&#x679C;</li>
<li>&#x5F88;&#x591A;&#x5E94;&#x7528;&#x53EA;&#x67E5;&#x8BE2;&#x4E00;&#x6B21; DNS &#x5E76;&#x7F13;&#x5B58;&#x4E86;&#x7ED3;&#x679C;<ul>
<li>&#x5C31;&#x7B97;&#x5E94;&#x7528;&#x548C;&#x5E93;&#x80FD;&#x591F;&#x6B63;&#x786E;&#x67E5;&#x8BE2;&#x89E3;&#x6790;&#xFF0C;&#x6BCF;&#x4E2A;&#x5BA2;&#x6237;&#x7AEF;&#x53CD;&#x590D;&#x91CD;&#x89E3;&#x6790;&#x9020;&#x6210;&#x7684;&#x8D1F;&#x8F7D;&#x4E5F;&#x662F;&#x975E;&#x5E38;&#x96BE;&#x4EE5;&#x7BA1;&#x7406;&#x7684;</li>
</ul>
</li>
</ul>
<p>&#x6211;&#x4EEC;&#x5C3D;&#x529B;&#x963B;&#x6B62;&#x7528;&#x6237;&#x505A;&#x90A3;&#x4E9B;&#x5BF9;&#x4ED6;&#x4EEC;&#x6CA1;&#x6709;&#x597D;&#x5904;&#x7684;&#x4E8B;&#x60C5;&#xFF0C;&#x5982;&#x679C;&#x5F88;&#x591A;&#x4EBA;&#x90FD;&#x6765;&#x95EE;&#x8FD9;&#x4E2A;&#x95EE;&#x9898;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x80FD;&#x4F1A;&#x9009;&#x62E9;&#x5B9E;&#x73B0;&#x5B83;&#x3002;</p>
<h2 id="&#x670D;&#x52A1;&#x53D1;&#x73B0;">&#x670D;&#x52A1;&#x53D1;&#x73B0;</h2>
<p>Kubernetes &#x652F;&#x6301;2&#x79CD;&#x57FA;&#x672C;&#x7684;&#x670D;&#x52A1;&#x53D1;&#x73B0;&#x6A21;&#x5F0F; &#x2014;&#x2014; &#x73AF;&#x5883;&#x53D8;&#x91CF;&#x548C; DNS&#x3002;</p>
<h3 id="&#x73AF;&#x5883;&#x53D8;&#x91CF;">&#x73AF;&#x5883;&#x53D8;&#x91CF;</h3>
<p>&#x5F53; <code>Pod</code> &#x8FD0;&#x884C;&#x5728; <code>Node</code> &#x4E0A;&#xFF0C;kubelet &#x4F1A;&#x4E3A;&#x6BCF;&#x4E2A;&#x6D3B;&#x8DC3;&#x7684; <code>Service</code> &#x6DFB;&#x52A0;&#x4E00;&#x7EC4;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x3002;
&#x5B83;&#x540C;&#x65F6;&#x652F;&#x6301; <a href="https://docs.docker.com/userguide/dockerlinks/" target="_blank">Docker links &#x517C;&#x5BB9;</a> &#x53D8;&#x91CF;&#xFF08;&#x67E5;&#x770B; <a href="http://releases.k8s.io//pkg/kubelet/envvars/envvars.go#L49" target="_blank">makeLinkVariables</a>&#xFF09;&#x3001;&#x7B80;&#x5355;&#x7684; <code>{SVCNAME}_SERVICE_HOST</code> &#x548C; <code>{SVCNAME}_SERVICE_PORT</code> &#x53D8;&#x91CF;&#xFF0C;&#x8FD9;&#x91CC; <code>Service</code> &#x7684;&#x540D;&#x79F0;&#x9700;&#x5927;&#x5199;&#xFF0C;&#x6A2A;&#x7EBF;&#x88AB;&#x8F6C;&#x6362;&#x6210;&#x4E0B;&#x5212;&#x7EBF;&#x3002;</p>
<p>&#x4E3E;&#x4E2A;&#x4F8B;&#x5B50;&#xFF0C;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#x4E3A; <code>&quot;redis-master&quot;</code> &#x7684; Service &#x66B4;&#x9732;&#x4E86; TCP &#x7AEF;&#x53E3; 6379&#xFF0C;&#x540C;&#x65F6;&#x7ED9;&#x5B83;&#x5206;&#x914D;&#x4E86; Cluster IP &#x5730;&#x5740; 10.0.0.11&#xFF0C;&#x8FD9;&#x4E2A; Service &#x751F;&#x6210;&#x4E86;&#x5982;&#x4E0B;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#xFF1A;</p>
<pre><code class="lang-shell">REDIS_MASTER_SERVICE_HOST=10.0.0.11
REDIS_MASTER_SERVICE_PORT=6379
REDIS_MASTER_PORT=tcp://10.0.0.11:6379
REDIS_MASTER_PORT_6379_TCP=tcp://10.0.0.11:6379
REDIS_MASTER_PORT_6379_TCP_PROTO=tcp
REDIS_MASTER_PORT_6379_TCP_PORT=6379
REDIS_MASTER_PORT_6379_TCP_ADDR=10.0.0.11
</code></pre>
<p><em>&#x8FD9;&#x610F;&#x5473;&#x7740;&#x9700;&#x8981;&#x6709;&#x987A;&#x5E8F;&#x7684;&#x8981;&#x6C42;</em> &#x2014;&#x2014; <code>Pod</code> &#x60F3;&#x8981;&#x8BBF;&#x95EE;&#x7684;&#x4EFB;&#x4F55; <code>Service</code> &#x5FC5;&#x987B;&#x5728; <code>Pod</code> &#x81EA;&#x5DF1;&#x4E4B;&#x524D;&#x88AB;&#x521B;&#x5EFA;&#xFF0C;&#x5426;&#x5219;&#x8FD9;&#x4E9B;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x5C31;&#x4E0D;&#x4F1A;&#x88AB;&#x8D4B;&#x503C;&#x3002;DNS &#x5E76;&#x6CA1;&#x6709;&#x8FD9;&#x4E2A;&#x9650;&#x5236;&#x3002;</p>
<h3 id="dns">DNS</h3>
<p>&#x4E00;&#x4E2A;&#x53EF;&#x9009;&#xFF08;&#x5C3D;&#x7BA1;&#x5F3A;&#x70C8;&#x63A8;&#x8350;&#xFF09;<a href="http://releases.k8s.io/master/cluster/addons/README.md" target="_blank">&#x96C6;&#x7FA4;&#x63D2;&#x4EF6;</a> &#x662F; DNS &#x670D;&#x52A1;&#x5668;&#x3002;
DNS &#x670D;&#x52A1;&#x5668;&#x76D1;&#x89C6;&#x7740;&#x521B;&#x5EFA;&#x65B0; <code>Service</code> &#x7684; Kubernetes API&#xFF0C;&#x4ECE;&#x800C;&#x4E3A;&#x6BCF;&#x4E00;&#x4E2A; <code>Service</code> &#x521B;&#x5EFA;&#x4E00;&#x7EC4; DNS &#x8BB0;&#x5F55;&#x3002;
&#x5982;&#x679C;&#x6574;&#x4E2A;&#x96C6;&#x7FA4;&#x7684; DNS &#x4E00;&#x76F4;&#x88AB;&#x542F;&#x7528;&#xFF0C;&#x90A3;&#x4E48;&#x6240;&#x6709;&#x7684; <code>Pod</code> &#x5E94;&#x8BE5;&#x80FD;&#x591F;&#x81EA;&#x52A8;&#x5BF9; <code>Service</code> &#x8FDB;&#x884C;&#x540D;&#x79F0;&#x89E3;&#x6790;&#x3002;</p>
<p>&#x4F8B;&#x5982;&#xFF0C;&#x6709;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#x4E3A; <code>&quot;my-service&quot;</code> &#x7684; <code>Service</code>&#xFF0C;&#x5B83;&#x5728; Kubernetes &#x96C6;&#x7FA4;&#x4E2D;&#x540D;&#x4E3A; <code>&quot;my-ns&quot;</code> &#x7684; <code>Namespace</code> &#x4E2D;&#xFF0C;&#x4E3A; <code>&quot;my-service.my-ns&quot;</code> &#x521B;&#x5EFA;&#x4E86;&#x4E00;&#x6761; DNS &#x8BB0;&#x5F55;&#x3002;
&#x5728;&#x540D;&#x79F0;&#x4E3A; <code>&quot;my-ns&quot;</code> &#x7684; <code>Namespace</code> &#x4E2D;&#x7684; <code>Pod</code> &#x5E94;&#x8BE5;&#x80FD;&#x591F;&#x7B80;&#x5355;&#x5730;&#x901A;&#x8FC7;&#x540D;&#x79F0;&#x67E5;&#x8BE2;&#x627E;&#x5230; <code>&quot;my-service&quot;</code>&#x3002;
&#x5728;&#x53E6;&#x4E00;&#x4E2A; <code>Namespace</code> &#x4E2D;&#x7684; <code>Pod</code> &#x5FC5;&#x987B;&#x9650;&#x5B9A;&#x540D;&#x79F0;&#x4E3A; <code>&quot;my-service.my-ns&quot;</code>&#x3002;
&#x8FD9;&#x4E9B;&#x540D;&#x79F0;&#x67E5;&#x8BE2;&#x7684;&#x7ED3;&#x679C;&#x662F; Cluster IP&#x3002;</p>
<p>Kubernetes &#x4E5F;&#x652F;&#x6301;&#x5BF9;&#x7AEF;&#x53E3;&#x540D;&#x79F0;&#x7684; DNS SRV&#xFF08;Service&#xFF09;&#x8BB0;&#x5F55;&#x3002;
&#x5982;&#x679C;&#x540D;&#x79F0;&#x4E3A; <code>&quot;my-service.my-ns&quot;</code> &#x7684; <code>Service</code> &#x6709;&#x4E00;&#x4E2A;&#x540D;&#x4E3A; <code>&quot;http&quot;</code> &#x7684; <code>TCP</code> &#x7AEF;&#x53E3;&#xFF0C;&#x53EF;&#x4EE5;&#x5BF9; <code>&quot;_http._tcp.my-service.my-ns&quot;</code> &#x6267;&#x884C; DNS SRV &#x67E5;&#x8BE2;&#xFF0C;&#x5F97;&#x5230; <code>&quot;http&quot;</code> &#x7684;&#x7AEF;&#x53E3;&#x53F7;&#x3002;</p>
<p>Kubernetes DNS &#x670D;&#x52A1;&#x5668;&#x662F;&#x552F;&#x4E00;&#x7684;&#x4E00;&#x79CD;&#x80FD;&#x591F;&#x8BBF;&#x95EE; <code>ExternalName</code> &#x7C7B;&#x578B;&#x7684; Service &#x7684;&#x65B9;&#x5F0F;&#x3002;
&#x66F4;&#x591A;&#x4FE1;&#x606F;&#x53EF;&#x4EE5;&#x67E5;&#x770B; <a href="https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/" target="_blank">DNS Pod &#x548C; Service</a>&#x3002;</p>
<h2 id="headless-service">Headless Service</h2>
<p>&#x6709;&#x65F6;&#x4E0D;&#x9700;&#x8981;&#x6216;&#x4E0D;&#x60F3;&#x8981;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#xFF0C;&#x4EE5;&#x53CA;&#x5355;&#x72EC;&#x7684; Service IP&#x3002;
&#x9047;&#x5230;&#x8FD9;&#x79CD;&#x60C5;&#x51B5;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x6307;&#x5B9A; Cluster IP&#xFF08;<code>spec.clusterIP</code>&#xFF09;&#x7684;&#x503C;&#x4E3A; <code>&quot;None&quot;</code> &#x6765;&#x521B;&#x5EFA; <code>Headless</code> Service&#x3002;</p>
<p>&#x8FD9;&#x4E2A;&#x9009;&#x9879;&#x5141;&#x8BB8;&#x5F00;&#x53D1;&#x4EBA;&#x5458;&#x81EA;&#x7531;&#x5BFB;&#x627E;&#x4ED6;&#x4EEC;&#x81EA;&#x5DF1;&#x7684;&#x65B9;&#x5F0F;&#xFF0C;&#x4ECE;&#x800C;&#x964D;&#x4F4E;&#x4E0E; Kubernetes &#x7CFB;&#x7EDF;&#x7684;&#x8026;&#x5408;&#x6027;&#x3002;
&#x5E94;&#x7528;&#x4ECD;&#x7136;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x4E00;&#x79CD;&#x81EA;&#x6CE8;&#x518C;&#x7684;&#x6A21;&#x5F0F;&#x548C;&#x9002;&#x914D;&#x5668;&#xFF0C;&#x5BF9;&#x5176;&#x5B83;&#x9700;&#x8981;&#x53D1;&#x73B0;&#x673A;&#x5236;&#x7684;&#x7CFB;&#x7EDF;&#x80FD;&#x591F;&#x5F88;&#x5BB9;&#x6613;&#x5730;&#x57FA;&#x4E8E;&#x8FD9;&#x4E2A; API &#x6765;&#x6784;&#x5EFA;&#x3002;</p>
<p>&#x5BF9;&#x8FD9;&#x7C7B; <code>Service</code> &#x5E76;&#x4E0D;&#x4F1A;&#x5206;&#x914D; Cluster IP&#xFF0C;kube-proxy &#x4E0D;&#x4F1A;&#x5904;&#x7406;&#x5B83;&#x4EEC;&#xFF0C;&#x800C;&#x4E14;&#x5E73;&#x53F0;&#x4E5F;&#x4E0D;&#x4F1A;&#x4E3A;&#x5B83;&#x4EEC;&#x8FDB;&#x884C;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x548C;&#x8DEF;&#x7531;&#x3002;
DNS &#x5982;&#x4F55;&#x5B9E;&#x73B0;&#x81EA;&#x52A8;&#x914D;&#x7F6E;&#xFF0C;&#x4F9D;&#x8D56;&#x4E8E; <code>Service</code> &#x662F;&#x5426;&#x5B9A;&#x4E49;&#x4E86; selector&#x3002;</p>
<h3 id="&#x914D;&#x7F6E;-selector">&#x914D;&#x7F6E; Selector</h3>
<p>&#x5BF9;&#x5B9A;&#x4E49;&#x4E86; selector &#x7684; Headless Service&#xFF0C;Endpoint &#x63A7;&#x5236;&#x5668;&#x5728; API &#x4E2D;&#x521B;&#x5EFA;&#x4E86; <code>Endpoints</code> &#x8BB0;&#x5F55;&#xFF0C;&#x5E76;&#x4E14;&#x4FEE;&#x6539; DNS &#x914D;&#x7F6E;&#x8FD4;&#x56DE; A &#x8BB0;&#x5F55;&#xFF08;&#x5730;&#x5740;&#xFF09;&#xFF0C;&#x901A;&#x8FC7;&#x8FD9;&#x4E2A;&#x5730;&#x5740;&#x76F4;&#x63A5;&#x5230;&#x8FBE; <code>Service</code> &#x7684;&#x540E;&#x7AEF; <code>Pod</code> &#x4E0A;&#x3002;</p>
<h3 id="&#x4E0D;&#x914D;&#x7F6E;-selector">&#x4E0D;&#x914D;&#x7F6E; Selector</h3>
<p>&#x5BF9;&#x6CA1;&#x6709;&#x5B9A;&#x4E49; selector &#x7684; Headless Service&#xFF0C;Endpoint &#x63A7;&#x5236;&#x5668;&#x4E0D;&#x4F1A;&#x521B;&#x5EFA; <code>Endpoints</code> &#x8BB0;&#x5F55;&#x3002;
&#x7136;&#x800C; DNS &#x7CFB;&#x7EDF;&#x4F1A;&#x67E5;&#x627E;&#x548C;&#x914D;&#x7F6E;&#xFF0C;&#x65E0;&#x8BBA;&#x662F;&#xFF1A;</p>
<ul>
<li><code>ExternalName</code> &#x7C7B;&#x578B; Service &#x7684; CNAME &#x8BB0;&#x5F55;<ul>
<li>&#x8BB0;&#x5F55;&#xFF1A;&#x4E0E; Service &#x5171;&#x4EAB;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#x7684;&#x4EFB;&#x4F55; <code>Endpoints</code>&#xFF0C;&#x4EE5;&#x53CA;&#x6240;&#x6709;&#x5176;&#x5B83;&#x7C7B;&#x578B;</li>
</ul>
</li>
</ul>
<h2 id="&#x53D1;&#x5E03;&#x670D;&#x52A1;-&#x2014;&#x2014;-&#x670D;&#x52A1;&#x7C7B;&#x578B;">&#x53D1;&#x5E03;&#x670D;&#x52A1; &#x2014;&#x2014; &#x670D;&#x52A1;&#x7C7B;&#x578B;</h2>
<p>&#x5BF9;&#x4E00;&#x4E9B;&#x5E94;&#x7528;&#xFF08;&#x5982; Frontend&#xFF09;&#x7684;&#x67D0;&#x4E9B;&#x90E8;&#x5206;&#xFF0C;&#x53EF;&#x80FD;&#x5E0C;&#x671B;&#x901A;&#x8FC7;&#x5916;&#x90E8;&#xFF08;Kubernetes &#x96C6;&#x7FA4;&#x5916;&#x90E8;&#xFF09;IP &#x5730;&#x5740;&#x66B4;&#x9732; Service&#x3002;</p>
<p>Kubernetes <code>ServiceTypes</code> &#x5141;&#x8BB8;&#x6307;&#x5B9A;&#x4E00;&#x4E2A;&#x9700;&#x8981;&#x7684;&#x7C7B;&#x578B;&#x7684; Service&#xFF0C;&#x9ED8;&#x8BA4;&#x662F; <code>ClusterIP</code> &#x7C7B;&#x578B;&#x3002;</p>
<p><code>Type</code> &#x7684;&#x53D6;&#x503C;&#x4EE5;&#x53CA;&#x884C;&#x4E3A;&#x5982;&#x4E0B;&#xFF1A;</p>
<ul>
<li><code>ClusterIP</code>&#xFF1A;&#x901A;&#x8FC7;&#x96C6;&#x7FA4;&#x7684;&#x5185;&#x90E8; IP &#x66B4;&#x9732;&#x670D;&#x52A1;&#xFF0C;&#x9009;&#x62E9;&#x8BE5;&#x503C;&#xFF0C;&#x670D;&#x52A1;&#x53EA;&#x80FD;&#x591F;&#x5728;&#x96C6;&#x7FA4;&#x5185;&#x90E8;&#x53EF;&#x4EE5;&#x8BBF;&#x95EE;&#xFF0C;&#x8FD9;&#x4E5F;&#x662F;&#x9ED8;&#x8BA4;&#x7684; <code>ServiceType</code>&#x3002;</li>
<li><code>NodePort</code>&#xFF1A;&#x901A;&#x8FC7;&#x6BCF;&#x4E2A; Node &#x4E0A;&#x7684; IP &#x548C;&#x9759;&#x6001;&#x7AEF;&#x53E3;&#xFF08;<code>NodePort</code>&#xFF09;&#x66B4;&#x9732;&#x670D;&#x52A1;&#x3002;<code>NodePort</code> &#x670D;&#x52A1;&#x4F1A;&#x8DEF;&#x7531;&#x5230; <code>ClusterIP</code> &#x670D;&#x52A1;&#xFF0C;&#x8FD9;&#x4E2A; <code>ClusterIP</code> &#x670D;&#x52A1;&#x4F1A;&#x81EA;&#x52A8;&#x521B;&#x5EFA;&#x3002;&#x901A;&#x8FC7;&#x8BF7;&#x6C42; <code>&lt;NodeIP&gt;:&lt;NodePort&gt;</code>&#xFF0C;&#x53EF;&#x4EE5;&#x4ECE;&#x96C6;&#x7FA4;&#x7684;&#x5916;&#x90E8;&#x8BBF;&#x95EE;&#x4E00;&#x4E2A; <code>NodePort</code> &#x670D;&#x52A1;&#x3002;</li>
<li><code>LoadBalancer</code>&#xFF1A;&#x4F7F;&#x7528;&#x4E91;&#x63D0;&#x4F9B;&#x5546;&#x7684;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#xFF0C;&#x53EF;&#x4EE5;&#x5411;&#x5916;&#x90E8;&#x66B4;&#x9732;&#x670D;&#x52A1;&#x3002;&#x5916;&#x90E8;&#x7684;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x53EF;&#x4EE5;&#x8DEF;&#x7531;&#x5230; <code>NodePort</code> &#x670D;&#x52A1;&#x548C; <code>ClusterIP</code> &#x670D;&#x52A1;&#x3002;</li>
<li><code>ExternalName</code>&#xFF1A;&#x901A;&#x8FC7;&#x8FD4;&#x56DE; <code>CNAME</code> &#x548C;&#x5B83;&#x7684;&#x503C;&#xFF0C;&#x53EF;&#x4EE5;&#x5C06;&#x670D;&#x52A1;&#x6620;&#x5C04;&#x5230; <code>externalName</code> &#x5B57;&#x6BB5;&#x7684;&#x5185;&#x5BB9;&#xFF08;&#x4F8B;&#x5982;&#xFF0C; <code>foo.bar.example.com</code>&#xFF09;&#x3002;
&#x6CA1;&#x6709;&#x4EFB;&#x4F55;&#x7C7B;&#x578B;&#x4EE3;&#x7406;&#x88AB;&#x521B;&#x5EFA;&#xFF0C;&#x8FD9;&#x53EA;&#x6709; Kubernetes 1.7 &#x6216;&#x66F4;&#x9AD8;&#x7248;&#x672C;&#x7684; <code>kube-dns</code> &#x624D;&#x652F;&#x6301;&#x3002;</li>
</ul>
<h3 id="nodeport-&#x7C7B;&#x578B;">NodePort &#x7C7B;&#x578B;</h3>
<p>&#x5982;&#x679C;&#x8BBE;&#x7F6E; <code>type</code> &#x7684;&#x503C;&#x4E3A; <code>&quot;NodePort&quot;</code>&#xFF0C;Kubernetes master &#x5C06;&#x4ECE;&#x7ED9;&#x5B9A;&#x7684;&#x914D;&#x7F6E;&#x8303;&#x56F4;&#x5185;&#xFF08;&#x9ED8;&#x8BA4;&#xFF1A;30000-32767&#xFF09;&#x5206;&#x914D;&#x7AEF;&#x53E3;&#xFF0C;&#x6BCF;&#x4E2A; Node &#x5C06;&#x4ECE;&#x8BE5;&#x7AEF;&#x53E3;&#xFF08;&#x6BCF;&#x4E2A; Node &#x4E0A;&#x7684;&#x540C;&#x4E00;&#x7AEF;&#x53E3;&#xFF09;&#x4EE3;&#x7406;&#x5230; <code>Service</code>&#x3002;&#x8BE5;&#x7AEF;&#x53E3;&#x5C06;&#x901A;&#x8FC7; <code>Service</code> &#x7684; <code>spec.ports[*].nodePort</code> &#x5B57;&#x6BB5;&#x88AB;&#x6307;&#x5B9A;&#x3002;</p>
<p>&#x5982;&#x679C;&#x9700;&#x8981;&#x6307;&#x5B9A;&#x7684;&#x7AEF;&#x53E3;&#x53F7;&#xFF0C;&#x53EF;&#x4EE5;&#x914D;&#x7F6E; <code>nodePort</code> &#x7684;&#x503C;&#xFF0C;&#x7CFB;&#x7EDF;&#x5C06;&#x5206;&#x914D;&#x8FD9;&#x4E2A;&#x7AEF;&#x53E3;&#xFF0C;&#x5426;&#x5219;&#x8C03;&#x7528; API &#x5C06;&#x4F1A;&#x5931;&#x8D25;&#xFF08;&#x6BD4;&#x5982;&#xFF0C;&#x9700;&#x8981;&#x5173;&#x5FC3;&#x7AEF;&#x53E3;&#x51B2;&#x7A81;&#x7684;&#x53EF;&#x80FD;&#x6027;&#xFF09;&#x3002; </p>
<p>&#x8FD9;&#x53EF;&#x4EE5;&#x8BA9;&#x5F00;&#x53D1;&#x4EBA;&#x5458;&#x81EA;&#x7531;&#x5730;&#x5B89;&#x88C5;&#x4ED6;&#x4EEC;&#x81EA;&#x5DF1;&#x7684;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#xFF0C;&#x5E76;&#x914D;&#x7F6E; Kubernetes &#x4E0D;&#x80FD;&#x5B8C;&#x5168;&#x652F;&#x6301;&#x7684;&#x73AF;&#x5883;&#x53C2;&#x6570;&#xFF0C;&#x6216;&#x8005;&#x76F4;&#x63A5;&#x66B4;&#x9732;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A; Node &#x7684; IP &#x5730;&#x5740;&#x3002;</p>
<p>&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x662F;&#xFF0C;Service &#x5C06;&#x80FD;&#x591F;&#x901A;&#x8FC7; <code>&lt;NodeIP&gt;:spec.ports[*].nodePort</code> &#x548C; <code>spec.clusterIp:spec.ports[*].port</code> &#x800C;&#x5BF9;&#x5916;&#x53EF;&#x89C1;&#x3002;</p>
<h3 id="loadbalancer-&#x7C7B;&#x578B;">LoadBalancer &#x7C7B;&#x578B;</h3>
<p>&#x4F7F;&#x7528;&#x652F;&#x6301;&#x5916;&#x90E8;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x7684;&#x4E91;&#x63D0;&#x4F9B;&#x5546;&#x7684;&#x670D;&#x52A1;&#xFF0C;&#x8BBE;&#x7F6E; <code>type</code> &#x7684;&#x503C;&#x4E3A; <code>&quot;LoadBalancer&quot;</code>&#xFF0C;&#x5C06;&#x4E3A; <code>Service</code> &#x63D0;&#x4F9B;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x3002;
&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x662F;&#x5F02;&#x6B65;&#x521B;&#x5EFA;&#x7684;&#xFF0C;&#x5173;&#x4E8E;&#x88AB;&#x63D0;&#x4F9B;&#x7684;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x7684;&#x4FE1;&#x606F;&#x5C06;&#x4F1A;&#x901A;&#x8FC7; <code>Service</code> &#x7684; <code>status.loadBalancer</code> &#x5B57;&#x6BB5;&#x88AB;&#x53D1;&#x5E03;&#x51FA;&#x53BB;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> selector:</span>
<span class="hljs-attr"> app:</span> MyApp
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9376</span>
<span class="hljs-attr"> nodePort:</span> <span class="hljs-number">30061</span>
<span class="hljs-attr"> clusterIP:</span> <span class="hljs-number">10.0</span><span class="hljs-number">.171</span><span class="hljs-number">.239</span>
<span class="hljs-attr"> loadBalancerIP:</span> <span class="hljs-number">78.11</span><span class="hljs-number">.24</span><span class="hljs-number">.19</span>
<span class="hljs-attr"> type:</span> LoadBalancer
<span class="hljs-attr">status:</span>
<span class="hljs-attr"> loadBalancer:</span>
<span class="hljs-attr"> ingress:</span>
<span class="hljs-attr"> - ip:</span> <span class="hljs-number">146.148</span><span class="hljs-number">.47</span><span class="hljs-number">.155</span>
</code></pre>
<p>&#x6765;&#x81EA;&#x5916;&#x90E8;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x7684;&#x6D41;&#x91CF;&#x5C06;&#x76F4;&#x63A5;&#x6253;&#x5230; backend <code>Pod</code> &#x4E0A;&#xFF0C;&#x4E0D;&#x8FC7;&#x5B9E;&#x9645;&#x5B83;&#x4EEC;&#x662F;&#x5982;&#x4F55;&#x5DE5;&#x4F5C;&#x7684;&#xFF0C;&#x8FD9;&#x8981;&#x4F9D;&#x8D56;&#x4E8E;&#x4E91;&#x63D0;&#x4F9B;&#x5546;&#x3002;
&#x5728;&#x8FD9;&#x4E9B;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x5C06;&#x6839;&#x636E;&#x7528;&#x6237;&#x8BBE;&#x7F6E;&#x7684; <code>loadBalancerIP</code> &#x6765;&#x521B;&#x5EFA;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x3002;
&#x67D0;&#x4E9B;&#x4E91;&#x63D0;&#x4F9B;&#x5546;&#x5141;&#x8BB8;&#x8BBE;&#x7F6E; <code>loadBalancerIP</code>&#x3002;&#x5982;&#x679C;&#x6CA1;&#x6709;&#x8BBE;&#x7F6E; <code>loadBalancerIP</code>&#xFF0C;&#x5C06;&#x4F1A;&#x7ED9;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x6307;&#x6D3E;&#x4E00;&#x4E2A;&#x4E34;&#x65F6; IP&#x3002;
&#x5982;&#x679C;&#x8BBE;&#x7F6E;&#x4E86; <code>loadBalancerIP</code>&#xFF0C;&#x4F46;&#x4E91;&#x63D0;&#x4F9B;&#x5546;&#x5E76;&#x4E0D;&#x652F;&#x6301;&#x8FD9;&#x79CD;&#x7279;&#x6027;&#xFF0C;&#x90A3;&#x4E48;&#x8BBE;&#x7F6E;&#x7684; <code>loadBalancerIP</code> &#x503C;&#x5C06;&#x4F1A;&#x88AB;&#x5FFD;&#x7565;&#x6389;&#x3002;</p>
<h3 id="aws-&#x5185;&#x90E8;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;">AWS &#x5185;&#x90E8;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;</h3>
<p>&#x5728;&#x6DF7;&#x5408;&#x4E91;&#x73AF;&#x5883;&#x4E2D;&#xFF0C;&#x6709;&#x65F6;&#x4ECE;&#x865A;&#x62DF;&#x79C1;&#x6709;&#x4E91;&#xFF08;VPC&#xFF09;&#x73AF;&#x5883;&#x4E2D;&#x7684;&#x670D;&#x52A1;&#x8DEF;&#x7531;&#x6D41;&#x91CF;&#x662F;&#x975E;&#x5E38;&#x6709;&#x5FC5;&#x8981;&#x7684;&#x3002;
&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x5728; <code>Service</code> &#x4E2D;&#x589E;&#x52A0; <code>annotation</code> &#x6765;&#x5B9E;&#x73B0;&#xFF0C;&#x5982;&#x4E0B;&#x6240;&#x793A;&#xFF1A;</p>
<pre><code class="lang-yaml">[...]
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr"> annotations:</span>
service.beta.kubernetes.io/aws-load-balancer-internal: <span class="hljs-number">0.0</span><span class="hljs-number">.0</span><span class="hljs-number">.0</span>/<span class="hljs-number">0</span>
[...]
</code></pre>
<p>&#x5728;&#x6C34;&#x5E73;&#x5206;&#x5272;&#x7684; DNS &#x73AF;&#x5883;&#x4E2D;&#xFF0C;&#x9700;&#x8981;&#x4E24;&#x4E2A; <code>Service</code> &#x6765;&#x5C06;&#x5916;&#x90E8;&#x548C;&#x5185;&#x90E8;&#x7684;&#x6D41;&#x91CF;&#x8DEF;&#x7531;&#x5230; Endpoint &#x4E0A;&#x3002;</p>
<h3 id="aws-ssl-&#x652F;&#x6301;">AWS SSL &#x652F;&#x6301;</h3>
<p>&#x5BF9;&#x8FD0;&#x884C;&#x5728; AWS &#x4E0A;&#x90E8;&#x5206;&#x652F;&#x6301; SSL &#x7684;&#x96C6;&#x7FA4;&#xFF0C;&#x4ECE; 1.3 &#x7248;&#x672C;&#x5F00;&#x59CB;&#xFF0C;&#x53EF;&#x4EE5;&#x4E3A; <code>LoadBalancer</code> &#x7C7B;&#x578B;&#x7684; <code>Service</code> &#x589E;&#x52A0;&#x4E24;&#x4E2A; annotation&#xFF1A;</p>
<pre><code> metadata:
name: my-service
annotations:
service.beta.kubernetes.io/aws-load-balancer-ssl-cert: arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012
</code></pre><p>&#x7B2C;&#x4E00;&#x4E2A; annotation &#x6307;&#x5B9A;&#x4E86;&#x4F7F;&#x7528;&#x7684;&#x8BC1;&#x4E66;&#x3002;&#x5B83;&#x53EF;&#x4EE5;&#x662F;&#x7B2C;&#x4E09;&#x65B9;&#x53D1;&#x884C;&#x5546;&#x53D1;&#x884C;&#x7684;&#x8BC1;&#x4E66;&#xFF0C;&#x8FD9;&#x4E2A;&#x8BC1;&#x4E66;&#x6216;&#x8005;&#x88AB;&#x4E0A;&#x4F20;&#x5230; IAM&#xFF0C;&#x6216;&#x8005;&#x7531; AWS &#x7684;&#x8BC1;&#x4E66;&#x7BA1;&#x7406;&#x5668;&#x521B;&#x5EFA;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr"> metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr"> annotations:</span>
service.beta.kubernetes.io/aws-load-balancer-backend-protocol: (https|http|ssl|tcp)
</code></pre>
<p>&#x7B2C;&#x4E8C;&#x4E2A; annotation &#x6307;&#x5B9A;&#x4E86; <code>Pod</code> &#x4F7F;&#x7528;&#x7684;&#x534F;&#x8BAE;&#x3002;
&#x5BF9;&#x4E8E; HTTPS &#x548C; SSL&#xFF0C;ELB &#x5C06;&#x671F;&#x671B;&#x8BE5; <code>Pod</code> &#x57FA;&#x4E8E;&#x52A0;&#x5BC6;&#x7684;&#x8FDE;&#x63A5;&#x6765;&#x8BA4;&#x8BC1;&#x81EA;&#x8EAB;&#x3002;</p>
<p>HTTP &#x548C; HTTPS &#x5C06;&#x9009;&#x62E9;7&#x5C42;&#x4EE3;&#x7406;&#xFF1A;ELB &#x5C06;&#x4E2D;&#x65AD;&#x4E0E;&#x7528;&#x6237;&#x7684;&#x8FDE;&#x63A5;&#xFF0C;&#x5F53;&#x8F6C;&#x53D1;&#x8BF7;&#x6C42;&#x65F6;&#xFF0C;&#x4F1A;&#x89E3;&#x6790; Header &#x4FE1;&#x606F;&#x5E76;&#x6DFB;&#x52A0;&#x4E0A;&#x7528;&#x6237;&#x7684; IP &#x5730;&#x5740;&#xFF08;<code>Pod</code> &#x5C06;&#x53EA;&#x80FD;&#x5728;&#x8FDE;&#x63A5;&#x7684;&#x53E6;&#x4E00;&#x7AEF;&#x770B;&#x5230;&#x8BE5; IP &#x5730;&#x5740;&#xFF09;&#x3002;</p>
<p>TCP &#x548C; SSL &#x5C06;&#x9009;&#x62E9;4&#x5C42;&#x4EE3;&#x7406;&#xFF1A;ELB &#x5C06;&#x8F6C;&#x53D1;&#x6D41;&#x91CF;&#xFF0C;&#x5E76;&#x4E0D;&#x4FEE;&#x6539; Header &#x4FE1;&#x606F;&#x3002;</p>
<h3 id="&#x5916;&#x90E8;-ip">&#x5916;&#x90E8; IP</h3>
<p>&#x5982;&#x679C;&#x5916;&#x90E8;&#x7684; IP &#x8DEF;&#x7531;&#x5230;&#x96C6;&#x7FA4;&#x4E2D;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A; Node &#x4E0A;&#xFF0C;Kubernetes <code>Service</code> &#x4F1A;&#x88AB;&#x66B4;&#x9732;&#x7ED9;&#x8FD9;&#x4E9B; <code>externalIPs</code>&#x3002;
&#x901A;&#x8FC7;&#x5916;&#x90E8; IP&#xFF08;&#x4F5C;&#x4E3A;&#x76EE;&#x7684; IP &#x5730;&#x5740;&#xFF09;&#x8FDB;&#x5165;&#x5230;&#x96C6;&#x7FA4;&#xFF0C;&#x6253;&#x5230; <code>Service</code> &#x7684;&#x7AEF;&#x53E3;&#x4E0A;&#x7684;&#x6D41;&#x91CF;&#xFF0C;&#x5C06;&#x4F1A;&#x88AB;&#x8DEF;&#x7531;&#x5230; <code>Service</code> &#x7684; Endpoint &#x4E0A;&#x3002;
<code>externalIPs</code> &#x4E0D;&#x4F1A;&#x88AB; Kubernetes &#x7BA1;&#x7406;&#xFF0C;&#x5B83;&#x5C5E;&#x4E8E;&#x96C6;&#x7FA4;&#x7BA1;&#x7406;&#x5458;&#x7684;&#x804C;&#x8D23;&#x8303;&#x7574;&#x3002;</p>
<p>&#x6839;&#x636E; <code>Service</code> &#x7684;&#x89C4;&#x5B9A;&#xFF0C;<code>externalIPs</code> &#x53EF;&#x4EE5;&#x540C;&#x4EFB;&#x610F;&#x7684; <code>ServiceType</code> &#x6765;&#x4E00;&#x8D77;&#x6307;&#x5B9A;&#x3002;
&#x5728;&#x4E0B;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#x4E2D;&#xFF0C;<code>my-service</code> &#x53EF;&#x4EE5;&#x5728; 80.11.12.10:80&#xFF08;&#x5916;&#x90E8; IP:&#x7AEF;&#x53E3;&#xFF09;&#x4E0A;&#x88AB;&#x5BA2;&#x6237;&#x7AEF;&#x8BBF;&#x95EE;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-service
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> selector:</span>
<span class="hljs-attr"> app:</span> MyApp
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - name:</span> http
<span class="hljs-attr"> protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9376</span>
<span class="hljs-attr"> externalIPs:</span>
<span class="hljs-bullet"> -</span> <span class="hljs-number">80.11</span><span class="hljs-number">.12</span><span class="hljs-number">.10</span>
</code></pre>
<h2 id="&#x4E0D;&#x8DB3;&#x4E4B;&#x5904;">&#x4E0D;&#x8DB3;&#x4E4B;&#x5904;</h2>
<p>&#x4E3A; VIP &#x4F7F;&#x7528; userspace &#x4EE3;&#x7406;&#xFF0C;&#x5C06;&#x53EA;&#x9002;&#x5408;&#x5C0F;&#x578B;&#x5230;&#x4E2D;&#x578B;&#x89C4;&#x6A21;&#x7684;&#x96C6;&#x7FA4;&#xFF0C;&#x4E0D;&#x80FD;&#x591F;&#x6269;&#x5C55;&#x5230;&#x4E0A;&#x5343; <code>Service</code> &#x7684;&#x5927;&#x578B;&#x96C6;&#x7FA4;&#x3002;
&#x67E5;&#x770B; <a href="http://issue.k8s.io/1107" target="_blank">&#x6700;&#x521D;&#x8BBE;&#x8BA1;&#x65B9;&#x6848;</a> &#x83B7;&#x53D6;&#x66F4;&#x591A;&#x7EC6;&#x8282;&#x3002;</p>
<p>&#x4F7F;&#x7528; userspace &#x4EE3;&#x7406;&#xFF0C;&#x9690;&#x85CF;&#x4E86;&#x8BBF;&#x95EE; <code>Service</code> &#x7684;&#x6570;&#x636E;&#x5305;&#x7684;&#x6E90; IP &#x5730;&#x5740;&#x3002;
&#x8FD9;&#x4F7F;&#x5F97;&#x4E00;&#x4E9B;&#x7C7B;&#x578B;&#x7684;&#x9632;&#x706B;&#x5899;&#x65E0;&#x6CD5;&#x8D77;&#x4F5C;&#x7528;&#x3002;
iptables &#x4EE3;&#x7406;&#x4E0D;&#x4F1A;&#x9690;&#x85CF; Kubernetes &#x96C6;&#x7FA4;&#x5185;&#x90E8;&#x7684; IP &#x5730;&#x5740;&#xFF0C;&#x4F46;&#x5374;&#x8981;&#x6C42;&#x5BA2;&#x6237;&#x7AEF;&#x8BF7;&#x6C42;&#x5FC5;&#x987B;&#x901A;&#x8FC7;&#x4E00;&#x4E2A;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x6216; Node &#x7AEF;&#x53E3;&#x3002;</p>
<p><code>Type</code> &#x5B57;&#x6BB5;&#x652F;&#x6301;&#x5D4C;&#x5957;&#x529F;&#x80FD; &#x2014;&#x2014; &#x6BCF;&#x4E00;&#x5C42;&#x9700;&#x8981;&#x6DFB;&#x52A0;&#x5230;&#x4E0A;&#x4E00;&#x5C42;&#x91CC;&#x9762;&#x3002;
&#x4E0D;&#x4F1A;&#x4E25;&#x683C;&#x8981;&#x6C42;&#x6240;&#x6709;&#x4E91;&#x63D0;&#x4F9B;&#x5546;&#xFF08;&#x4F8B;&#x5982;&#xFF0C;GCE &#x5C31;&#x6CA1;&#x5FC5;&#x8981;&#x4E3A;&#x4E86;&#x4F7F;&#x4E00;&#x4E2A; <code>LoadBalancer</code> &#x80FD;&#x5DE5;&#x4F5C;&#x800C;&#x5206;&#x914D;&#x4E00;&#x4E2A; <code>NodePort</code>&#xFF0C;&#x4F46;&#x662F; AWS &#x9700;&#x8981; &#xFF09;&#xFF0C;&#x4F46;&#x5F53;&#x524D; API &#x662F;&#x5F3A;&#x5236;&#x8981;&#x6C42;&#x7684;&#x3002;</p>
<h2 id="&#x672A;&#x6765;&#x5DE5;&#x4F5C;">&#x672A;&#x6765;&#x5DE5;&#x4F5C;</h2>
<p>&#x672A;&#x6765;&#x6211;&#x4EEC;&#x80FD;&#x9884;&#x89C1;&#x5230;&#xFF0C;&#x4EE3;&#x7406;&#x7B56;&#x7565;&#x53EF;&#x80FD;&#x4F1A;&#x53D8;&#x5F97;&#x6BD4;&#x7B80;&#x5355;&#x7684; round-robin &#x5747;&#x8861;&#x7B56;&#x7565;&#x6709;&#x66F4;&#x591A;&#x7EC6;&#x5FAE;&#x7684;&#x5DEE;&#x522B;&#xFF0C;&#x6BD4;&#x5982; master &#x9009;&#x4E3E;&#x6216;&#x5206;&#x7247;&#x3002;
&#x6211;&#x4EEC;&#x4E5F;&#x80FD;&#x60F3;&#x5230;&#xFF0C;&#x67D0;&#x4E9B; <code>Service</code> &#x5C06;&#x5177;&#x6709; &#x201C;&#x771F;&#x6B63;&#x201D; &#x7684;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#xFF0C;&#x8FD9;&#x79CD;&#x60C5;&#x51B5;&#x4E0B; VIP &#x5C06;&#x7B80;&#x5316;&#x6570;&#x636E;&#x5305;&#x7684;&#x4F20;&#x8F93;&#x3002;</p>
<p>&#x6211;&#x4EEC;&#x6253;&#x7B97;&#x4E3A; L7&#xFF08;HTTP&#xFF09;<code>Service</code> &#x6539;&#x8FDB;&#x6211;&#x4EEC;&#x5BF9;&#x5B83;&#x7684;&#x652F;&#x6301;&#x3002;</p>
<p>&#x6211;&#x4EEC;&#x6253;&#x7B97;&#x4E3A; <code>Service</code> &#x5B9E;&#x73B0;&#x66F4;&#x52A0;&#x7075;&#x6D3B;&#x7684;&#x8BF7;&#x6C42;&#x8FDB;&#x5165;&#x6A21;&#x5F0F;&#xFF0C;&#x8FD9;&#x4E9B; <code>Service</code> &#x5305;&#x542B;&#x5F53;&#x524D; <code>ClusterIP</code>&#x3001;<code>NodePort</code> &#x548C; <code>LoadBalancer</code> &#x6A21;&#x5F0F;&#xFF0C;&#x6216;&#x8005;&#x66F4;&#x591A;&#x3002;</p>
<h2 id="vip-&#x7684;&#x90A3;&#x4E9B;&#x9A87;&#x4EBA;&#x542C;&#x95FB;&#x7684;&#x7EC6;&#x8282;">VIP &#x7684;&#x90A3;&#x4E9B;&#x9A87;&#x4EBA;&#x542C;&#x95FB;&#x7684;&#x7EC6;&#x8282;</h2>
<p>&#x5BF9;&#x5F88;&#x591A;&#x60F3;&#x4F7F;&#x7528; <code>Service</code> &#x7684;&#x4EBA;&#x6765;&#x8BF4;&#xFF0C;&#x524D;&#x9762;&#x7684;&#x4FE1;&#x606F;&#x5E94;&#x8BE5;&#x8DB3;&#x591F;&#x4E86;&#x3002;
&#x7136;&#x800C;&#xFF0C;&#x6709;&#x5F88;&#x591A;&#x5185;&#x90E8;&#x539F;&#x7406;&#x6027;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x8FD8;&#x662F;&#x503C;&#x53BB;&#x7406;&#x89E3;&#x7684;&#x3002;</p>
<h3 id="&#x907F;&#x514D;&#x51B2;&#x7A81;">&#x907F;&#x514D;&#x51B2;&#x7A81;</h3>
<p>Kubernetes &#x6700;&#x4E3B;&#x8981;&#x7684;&#x54F2;&#x5B66;&#x4E4B;&#x4E00;&#xFF0C;&#x662F;&#x7528;&#x6237;&#x4E0D;&#x5E94;&#x8BE5;&#x66B4;&#x9732;&#x90A3;&#x4E9B;&#x80FD;&#x591F;&#x5BFC;&#x81F4;&#x4ED6;&#x4EEC;&#x64CD;&#x4F5C;&#x5931;&#x8D25;&#x3001;&#x4F46;&#x53C8;&#x4E0D;&#x662F;&#x4ED6;&#x4EEC;&#x7684;&#x8FC7;&#x9519;&#x7684;&#x573A;&#x666F;&#x3002;
&#x8FD9;&#x79CD;&#x573A;&#x666F;&#x4E0B;&#xFF0C;&#x8BA9;&#x6211;&#x4EEC;&#x6765;&#x770B;&#x4E00;&#x4E0B;&#x7F51;&#x7EDC;&#x7AEF;&#x53E3; &#x2014;&#x2014; &#x7528;&#x6237;&#x4E0D;&#x5E94;&#x8BE5;&#x5FC5;&#x987B;&#x9009;&#x62E9;&#x4E00;&#x4E2A;&#x7AEF;&#x53E3;&#x53F7;&#xFF0C;&#x800C;&#x4E14;&#x8BE5;&#x7AEF;&#x53E3;&#x8FD8;&#x6709;&#x53EF;&#x80FD;&#x4E0E;&#x5176;&#x4ED6;&#x7528;&#x6237;&#x7684;&#x51B2;&#x7A81;&#x3002;
&#x8FD9;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x5728;&#x5F7C;&#x6B64;&#x9694;&#x79BB;&#x72B6;&#x6001;&#x4E0B;&#x4ECD;&#x7136;&#x4F1A;&#x51FA;&#x73B0;&#x5931;&#x8D25;&#x3002;</p>
<p>&#x4E3A;&#x4E86;&#x4F7F;&#x7528;&#x6237;&#x80FD;&#x591F;&#x4E3A;&#x4ED6;&#x4EEC;&#x7684; <code>Service</code> &#x9009;&#x62E9;&#x4E00;&#x4E2A;&#x7AEF;&#x53E3;&#x53F7;&#xFF0C;&#x6211;&#x4EEC;&#x5FC5;&#x987B;&#x786E;&#x4FDD;&#x4E0D;&#x80FD;&#x6709;2&#x4E2A; <code>Service</code> &#x53D1;&#x751F;&#x51B2;&#x7A81;&#x3002;
&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x4E3A;&#x6BCF;&#x4E2A; <code>Service</code> &#x5206;&#x914D;&#x5B83;&#x4EEC;&#x81EA;&#x5DF1;&#x7684; IP &#x5730;&#x5740;&#x6765;&#x5B9E;&#x73B0;&#x3002;</p>
<p>&#x4E3A;&#x4E86;&#x4FDD;&#x8BC1;&#x6BCF;&#x4E2A; <code>Service</code> &#x88AB;&#x5206;&#x914D;&#x5230;&#x4E00;&#x4E2A;&#x552F;&#x4E00;&#x7684; IP&#xFF0C;&#x9700;&#x8981;&#x4E00;&#x4E2A;&#x5185;&#x90E8;&#x7684;&#x5206;&#x914D;&#x5668;&#x80FD;&#x591F;&#x539F;&#x5B50;&#x5730;&#x66F4;&#x65B0; etcd &#x4E2D;&#x7684;&#x4E00;&#x4E2A;&#x5168;&#x5C40;&#x5206;&#x914D;&#x6620;&#x5C04;&#x8868;&#xFF0C;&#x8FD9;&#x4E2A;&#x66F4;&#x65B0;&#x64CD;&#x4F5C;&#x8981;&#x5148;&#x4E8E;&#x521B;&#x5EFA;&#x6BCF;&#x4E00;&#x4E2A; <code>Service</code>&#x3002;
&#x4E3A;&#x4E86;&#x4F7F; <code>Service</code> &#x80FD;&#x591F;&#x83B7;&#x53D6;&#x5230; IP&#xFF0C;&#x8FD9;&#x4E2A;&#x6620;&#x5C04;&#x8868;&#x5BF9;&#x8C61;&#x5FC5;&#x987B;&#x5728;&#x6CE8;&#x518C;&#x4E2D;&#x5FC3;&#x5B58;&#x5728;&#xFF0C;&#x5426;&#x5219;&#x521B;&#x5EFA; <code>Service</code> &#x5C06;&#x4F1A;&#x5931;&#x8D25;&#xFF0C;&#x6307;&#x793A;&#x4E00;&#x4E2A; IP &#x4E0D;&#x80FD;&#x88AB;&#x5206;&#x914D;&#x3002;
&#x4E00;&#x4E2A;&#x540E;&#x53F0; Controller &#x7684;&#x804C;&#x8D23;&#x662F;&#x521B;&#x5EFA;&#x6620;&#x5C04;&#x8868;&#xFF08;&#x4ECE; Kubernetes &#x7684;&#x65E7;&#x7248;&#x672C;&#x8FC1;&#x79FB;&#x8FC7;&#x6765;&#xFF0C;&#x65E7;&#x7248;&#x672C;&#x4E2D;&#x662F;&#x901A;&#x8FC7;&#x5728;&#x5185;&#x5B58;&#x4E2D;&#x52A0;&#x9501;&#x7684;&#x65B9;&#x5F0F;&#x5B9E;&#x73B0;&#xFF09;&#xFF0C;&#x5E76;&#x68C0;&#x67E5;&#x7531;&#x4E8E;&#x7BA1;&#x7406;&#x5458;&#x5E72;&#x9884;&#x548C;&#x6E05;&#x9664;&#x4EFB;&#x610F; IP &#x9020;&#x6210;&#x7684;&#x4E0D;&#x5408;&#x7406;&#x5206;&#x914D;&#xFF0C;&#x8FD9;&#x4E9B; IP &#x88AB;&#x5206;&#x914D;&#x4E86;&#x4F46;&#x5F53;&#x524D;&#x6CA1;&#x6709; <code>Service</code> &#x4F7F;&#x7528;&#x5B83;&#x4EEC;&#x3002;</p>
<h3 id="ip-&#x548C;-vip">IP &#x548C; VIP</h3>
<p>&#x4E0D;&#x50CF; <code>Pod</code> &#x7684; IP &#x5730;&#x5740;&#xFF0C;&#x5B83;&#x5B9E;&#x9645;&#x8DEF;&#x7531;&#x5230;&#x4E00;&#x4E2A;&#x56FA;&#x5B9A;&#x7684;&#x76EE;&#x7684;&#x5730;&#xFF0C;<code>Service</code> &#x7684; IP &#x5B9E;&#x9645;&#x4E0A;&#x4E0D;&#x80FD;&#x901A;&#x8FC7;&#x5355;&#x4E2A;&#x4E3B;&#x673A;&#x6765;&#x8FDB;&#x884C;&#x5E94;&#x7B54;&#x3002;
&#x76F8;&#x53CD;&#xFF0C;&#x6211;&#x4EEC;&#x4F7F;&#x7528; <code>iptables</code>&#xFF08;Linux &#x4E2D;&#x7684;&#x6570;&#x636E;&#x5305;&#x5904;&#x7406;&#x903B;&#x8F91;&#xFF09;&#x6765;&#x5B9A;&#x4E49;&#x4E00;&#x4E2A;&#x865A;&#x62DF;IP&#x5730;&#x5740;&#xFF08;VIP&#xFF09;&#xFF0C;&#x5B83;&#x53EF;&#x4EE5;&#x6839;&#x636E;&#x9700;&#x8981;&#x900F;&#x660E;&#x5730;&#x8FDB;&#x884C;&#x91CD;&#x5B9A;&#x5411;&#x3002;
&#x5F53;&#x5BA2;&#x6237;&#x7AEF;&#x8FDE;&#x63A5;&#x5230; VIP &#x65F6;&#xFF0C;&#x5B83;&#x4EEC;&#x7684;&#x6D41;&#x91CF;&#x4F1A;&#x81EA;&#x52A8;&#x5730;&#x4F20;&#x8F93;&#x5230;&#x4E00;&#x4E2A;&#x5408;&#x9002;&#x7684; Endpoint&#x3002;
&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x548C; DNS&#xFF0C;&#x5B9E;&#x9645;&#x4E0A;&#x4F1A;&#x6839;&#x636E; <code>Service</code> &#x7684; VIP &#x548C;&#x7AEF;&#x53E3;&#x6765;&#x8FDB;&#x884C;&#x586B;&#x5145;&#x3002;</p>
<h4 id="userspace">Userspace</h4>
<p>&#x4F5C;&#x4E3A;&#x4E00;&#x4E2A;&#x4F8B;&#x5B50;&#xFF0C;&#x8003;&#x8651;&#x524D;&#x9762;&#x63D0;&#x5230;&#x7684;&#x56FE;&#x7247;&#x5904;&#x7406;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x3002;
&#x5F53;&#x521B;&#x5EFA; backend <code>Service</code> &#x65F6;&#xFF0C;Kubernetes master &#x4F1A;&#x7ED9;&#x5B83;&#x6307;&#x6D3E;&#x4E00;&#x4E2A;&#x865A;&#x62DF; IP &#x5730;&#x5740;&#xFF0C;&#x6BD4;&#x5982; 10.0.0.1&#x3002;
&#x5047;&#x8BBE; <code>Service</code> &#x7684;&#x7AEF;&#x53E3;&#x662F; 1234&#xFF0C;&#x8BE5; <code>Service</code> &#x4F1A;&#x88AB;&#x96C6;&#x7FA4;&#x4E2D;&#x6240;&#x6709;&#x7684; <code>kube-proxy</code> &#x5B9E;&#x4F8B;&#x89C2;&#x5BDF;&#x5230;&#x3002;
&#x5F53;&#x4EE3;&#x7406;&#x770B;&#x5230;&#x4E00;&#x4E2A;&#x65B0;&#x7684; <code>Service</code>&#xFF0C; &#x5B83;&#x4F1A;&#x6253;&#x5F00;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x7AEF;&#x53E3;&#xFF0C;&#x5EFA;&#x7ACB;&#x4E00;&#x4E2A;&#x4ECE;&#x8BE5; VIP &#x91CD;&#x5B9A;&#x5411;&#x5230;&#x65B0;&#x7AEF;&#x53E3;&#x7684; iptables&#xFF0C;&#x5E76;&#x5F00;&#x59CB;&#x63A5;&#x6536;&#x8BF7;&#x6C42;&#x8FDE;&#x63A5;&#x3002;</p>
<p>&#x5F53;&#x4E00;&#x4E2A;&#x5BA2;&#x6237;&#x7AEF;&#x8FDE;&#x63A5;&#x5230;&#x4E00;&#x4E2A; VIP&#xFF0C;iptables &#x89C4;&#x5219;&#x5F00;&#x59CB;&#x8D77;&#x4F5C;&#x7528;&#xFF0C;&#x5B83;&#x4F1A;&#x91CD;&#x5B9A;&#x5411;&#x8BE5;&#x6570;&#x636E;&#x5305;&#x5230; <code>Service&#x4EE3;&#x7406;</code> &#x7684;&#x7AEF;&#x53E3;&#x3002;
<code>Service&#x4EE3;&#x7406;</code> &#x9009;&#x62E9;&#x4E00;&#x4E2A; backend&#xFF0C;&#x5E76;&#x5C06;&#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x6D41;&#x91CF;&#x4EE3;&#x7406;&#x5230; backend &#x4E0A;&#x3002;</p>
<p>&#x8FD9;&#x610F;&#x5473;&#x7740; <code>Service</code> &#x7684;&#x6240;&#x6709;&#x8005;&#x80FD;&#x591F;&#x9009;&#x62E9;&#x4EFB;&#x4F55;&#x4ED6;&#x4EEC;&#x60F3;&#x4F7F;&#x7528;&#x7684;&#x7AEF;&#x53E3;&#xFF0C;&#x800C;&#x4E0D;&#x5B58;&#x5728;&#x51B2;&#x7A81;&#x7684;&#x98CE;&#x9669;&#x3002;
&#x5BA2;&#x6237;&#x7AEF;&#x53EF;&#x4EE5;&#x7B80;&#x5355;&#x5730;&#x8FDE;&#x63A5;&#x5230;&#x4E00;&#x4E2A; IP &#x548C;&#x7AEF;&#x53E3;&#xFF0C;&#x800C;&#x4E0D;&#x9700;&#x8981;&#x77E5;&#x9053;&#x5B9E;&#x9645;&#x8BBF;&#x95EE;&#x4E86;&#x54EA;&#x4E9B; <code>Pod</code>&#x3002;</p>
<h4 id="iptables">Iptables</h4>
<p>&#x518D;&#x6B21;&#x8003;&#x8651;&#x524D;&#x9762;&#x63D0;&#x5230;&#x7684;&#x56FE;&#x7247;&#x5904;&#x7406;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x3002;
&#x5F53;&#x521B;&#x5EFA; backend <code>Service</code> &#x65F6;&#xFF0C;Kubernetes master &#x4F1A;&#x7ED9;&#x5B83;&#x6307;&#x6D3E;&#x4E00;&#x4E2A;&#x865A;&#x62DF; IP &#x5730;&#x5740;&#xFF0C;&#x6BD4;&#x5982; 10.0.0.1&#x3002;
&#x5047;&#x8BBE; <code>Service</code> &#x7684;&#x7AEF;&#x53E3;&#x662F; 1234&#xFF0C;&#x8BE5; <code>Service</code> &#x4F1A;&#x88AB;&#x96C6;&#x7FA4;&#x4E2D;&#x6240;&#x6709;&#x7684; <code>kube-proxy</code> &#x5B9E;&#x4F8B;&#x89C2;&#x5BDF;&#x5230;&#x3002;
&#x5F53;&#x4EE3;&#x7406;&#x770B;&#x5230;&#x4E00;&#x4E2A;&#x65B0;&#x7684; <code>Service</code>&#xFF0C; &#x5B83;&#x4F1A;&#x5B89;&#x88C5;&#x4E00;&#x7CFB;&#x5217;&#x7684; iptables &#x89C4;&#x5219;&#xFF0C;&#x4ECE; VIP &#x91CD;&#x5B9A;&#x5411;&#x5230; per-<code>Service</code> &#x89C4;&#x5219;&#x3002;
&#x8BE5; per-<code>Service</code> &#x89C4;&#x5219;&#x8FDE;&#x63A5;&#x5230; per-<code>Endpoint</code> &#x89C4;&#x5219;&#xFF0C;&#x8BE5; per-<code>Endpoint</code> &#x89C4;&#x5219;&#x4F1A;&#x91CD;&#x5B9A;&#x5411;&#xFF08;&#x76EE;&#x6807; NAT&#xFF09;&#x5230; backend&#x3002;</p>
<p>&#x5F53;&#x4E00;&#x4E2A;&#x5BA2;&#x6237;&#x7AEF;&#x8FDE;&#x63A5;&#x5230;&#x4E00;&#x4E2A; VIP&#xFF0C;iptables &#x89C4;&#x5219;&#x5F00;&#x59CB;&#x8D77;&#x4F5C;&#x7528;&#x3002;&#x4E00;&#x4E2A; backend &#x4F1A;&#x88AB;&#x9009;&#x62E9;&#xFF08;&#x6216;&#x8005;&#x6839;&#x636E;&#x4F1A;&#x8BDD;&#x4EB2;&#x548C;&#x6027;&#xFF0C;&#x6216;&#x8005;&#x968F;&#x673A;&#xFF09;&#xFF0C;&#x6570;&#x636E;&#x5305;&#x88AB;&#x91CD;&#x5B9A;&#x5411;&#x5230;&#x8FD9;&#x4E2A; backend&#x3002;
&#x4E0D;&#x50CF; userspace &#x4EE3;&#x7406;&#xFF0C;&#x6570;&#x636E;&#x5305;&#x4ECE;&#x6765;&#x4E0D;&#x62F7;&#x8D1D;&#x5230;&#x7528;&#x6237;&#x7A7A;&#x95F4;&#xFF0C;kube-proxy &#x4E0D;&#x662F;&#x5FC5;&#x987B;&#x4E3A;&#x8BE5; VIP &#x5DE5;&#x4F5C;&#x800C;&#x8FD0;&#x884C;&#xFF0C;&#x5E76;&#x4E14;&#x5BA2;&#x6237;&#x7AEF; IP &#x662F;&#x4E0D;&#x53EF;&#x66F4;&#x6539;&#x7684;&#x3002;
&#x5F53;&#x6D41;&#x91CF;&#x6253;&#x5230; Node &#x7684;&#x7AEF;&#x53E3;&#x4E0A;&#xFF0C;&#x6216;&#x901A;&#x8FC7;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#xFF0C;&#x4F1A;&#x6267;&#x884C;&#x76F8;&#x540C;&#x7684;&#x57FA;&#x672C;&#x6D41;&#x7A0B;&#xFF0C;&#x4F46;&#x662F;&#x5728;&#x90A3;&#x4E9B;&#x6848;&#x4F8B;&#x4E2D;&#x5BA2;&#x6237;&#x7AEF; IP &#x662F;&#x53EF;&#x4EE5;&#x66F4;&#x6539;&#x7684;&#x3002;</p>
<h2 id="api-&#x5BF9;&#x8C61;">API &#x5BF9;&#x8C61;</h2>
<p>&#x5728; Kubernetes REST API &#x4E2D;&#xFF0C;Service &#x662F; top-level &#x8D44;&#x6E90;&#x3002;&#x5173;&#x4E8E; API &#x5BF9;&#x8C61;&#x7684;&#x66F4;&#x591A;&#x7EC6;&#x8282;&#x53EF;&#x4EE5;&#x67E5;&#x770B;&#xFF1A;<a href="https://kubernetes.io/docs/api-reference/v1.7/#service-v1-core" target="_blank">Service API &#x5BF9;&#x8C61;</a>&#x3002;</p>
<h2 id="&#x66F4;&#x591A;&#x4FE1;&#x606F;">&#x66F4;&#x591A;&#x4FE1;&#x606F;</h2>
2017-10-18 14:16:55 +08:00
<ul>
<li><a href="https://kubernetes.io/docs/tutorials/connecting-apps/connecting-frontend-backend/" target="_blank">&#x4F7F;&#x7528; Service &#x8FDE;&#x63A5; Frontend &#x5230; Backend</a> </li>
</ul>
2017-10-09 15:28:05 +08:00
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