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<title>6.3 client-go示例 · Kubernetes Handbook</title>
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<li class="chapter " data-level="1.1" data-path="../">
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<a href="../">
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1. 前言
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<li class="chapter " data-level="1.2" data-path="../concepts/">
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<a href="../concepts/">
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2. 概念原理
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<ul class="articles">
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<li class="chapter " data-level="1.2.1" data-path="../concepts/concepts.html">
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<a href="../concepts/concepts.html">
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2.1 设计理念
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</a>
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</li>
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<li class="chapter " data-level="1.2.2" data-path="../concepts/objects.html">
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<a href="../concepts/objects.html">
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2.2 Objects
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.2.2.1" data-path="../concepts/pod-overview.html">
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<a href="../concepts/pod-overview.html">
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2.2.1 Pod
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.2.2.1.1" data-path="../concepts/pod.html">
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<a href="../concepts/pod.html">
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2.2.1.1 Pod解析
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</a>
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<li class="chapter " data-level="1.2.2.1.2" data-path="../concepts/init-containers.html">
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<a href="../concepts/init-containers.html">
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2.2.1.2 Init容器
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.1.3" data-path="../concepts/pod-security-policy.html">
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<a href="../concepts/pod-security-policy.html">
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2.2.1.3 Pod安全策略
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.2.2.2" data-path="../concepts/node.html">
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<a href="../concepts/node.html">
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2.2.2 Node
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.3" data-path="../concepts/namespace.html">
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<a href="../concepts/namespace.html">
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2.2.3 Namespace
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.4" data-path="../concepts/service.html">
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<a href="../concepts/service.html">
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2.2.4 Service
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.5" data-path="../concepts/volume.html">
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<a href="../concepts/volume.html">
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2.2.5 Volume和Persistent Volume
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.6" data-path="../concepts/deployment.html">
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<a href="../concepts/deployment.html">
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2.2.6 Deployment
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.7" data-path="../concepts/secret.html">
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<a href="../concepts/secret.html">
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2.2.7 Secret
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.8" data-path="../concepts/statefulset.html">
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<a href="../concepts/statefulset.html">
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2.2.8 StatefulSet
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.9" data-path="../concepts/daemonset.html">
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<a href="../concepts/daemonset.html">
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2.2.9 DaemonSet
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.10" data-path="../concepts/serviceaccount.html">
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<a href="../concepts/serviceaccount.html">
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2.2.10 ServiceAccount
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.11" data-path="../concepts/replicaset.html">
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<a href="../concepts/replicaset.html">
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2.2.11 ReplicationController和ReplicaSet
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||
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</a>
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</li>
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<li class="chapter " data-level="1.2.2.12" data-path="../concepts/job.html">
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<a href="../concepts/job.html">
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2.2.12 Job
|
||
|
||
</a>
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||
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</li>
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<li class="chapter " data-level="1.2.2.13" data-path="../concepts/cronjob.html">
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<a href="../concepts/cronjob.html">
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2.2.13 CronJob
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||
|
||
</a>
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||
|
||
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</li>
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<li class="chapter " data-level="1.2.2.14" data-path="../concepts/ingress.html">
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<a href="../concepts/ingress.html">
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2.2.14 Ingress
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||
|
||
</a>
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||
|
||
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</li>
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|
||
<li class="chapter " data-level="1.2.2.15" data-path="../concepts/configmap.html">
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||
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<a href="../concepts/configmap.html">
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||
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||
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2.2.15 ConfigMap
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||
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||
</a>
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||
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||
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||
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||
</li>
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||
|
||
<li class="chapter " data-level="1.2.2.16" data-path="../concepts/horizontal-pod-autoscaling.html">
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||
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||
<a href="../concepts/horizontal-pod-autoscaling.html">
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||
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||
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2.2.16 Horizontal Pod Autoscaling
|
||
|
||
</a>
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||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.2.2.17" data-path="../concepts/label.html">
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||
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||
<a href="../concepts/label.html">
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||
|
||
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2.2.17 Label
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.2.2.18" data-path="../concepts/garbage-collection.html">
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||
|
||
<a href="../concepts/garbage-collection.html">
|
||
|
||
|
||
2.2.18 垃圾收集
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.2.2.19" data-path="../concepts/network-policy.html">
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||
|
||
<a href="../concepts/network-policy.html">
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||
|
||
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2.2.19 NetworkPolicy
|
||
|
||
</a>
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||
|
||
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||
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||
</li>
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||
|
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||
</ul>
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||
</li>
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||
|
||
|
||
</ul>
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||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3" data-path="../guide/">
|
||
|
||
<a href="../guide/">
|
||
|
||
|
||
3. 用户指南
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
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||
|
||
|
||
<li class="chapter " data-level="1.3.1" data-path="../guide/resource-configuration.html">
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||
|
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<a href="../guide/resource-configuration.html">
|
||
|
||
|
||
3.1 资源配置
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.3.1.1" data-path="../guide/configure-liveness-readiness-probes.html">
|
||
|
||
<a href="../guide/configure-liveness-readiness-probes.html">
|
||
|
||
|
||
3.1.1 配置Pod的liveness和readiness探针
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.1.2" data-path="../guide/configure-pod-service-account.html">
|
||
|
||
<a href="../guide/configure-pod-service-account.html">
|
||
|
||
|
||
3.1.2 配置Pod的Service Account
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
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||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.2" data-path="../guide/command-usage.html">
|
||
|
||
<a href="../guide/command-usage.html">
|
||
|
||
|
||
3.2 命令使用
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.3.2.1" data-path="../guide/using-kubectl.html">
|
||
|
||
<a href="../guide/using-kubectl.html">
|
||
|
||
|
||
3.2.1 使用kubectl
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.3" data-path="../guide/cluster-security-management.html">
|
||
|
||
<a href="../guide/cluster-security-management.html">
|
||
|
||
|
||
3.3 集群安全性管理
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.3.3.1" data-path="../guide/managing-tls-in-a-cluster.html">
|
||
|
||
<a href="../guide/managing-tls-in-a-cluster.html">
|
||
|
||
|
||
3.3.1 管理集群中的TLS
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.3.2" data-path="../guide/kubelet-authentication-authorization.html">
|
||
|
||
<a href="../guide/kubelet-authentication-authorization.html">
|
||
|
||
|
||
3.3.2 kubelet的认证授权
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.3.3" data-path="../guide/tls-bootstrapping.html">
|
||
|
||
<a href="../guide/tls-bootstrapping.html">
|
||
|
||
|
||
3.3.3 TLS bootstrap
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.3.4" data-path="../guide/kubectl-user-authentication-authorization.html">
|
||
|
||
<a href="../guide/kubectl-user-authentication-authorization.html">
|
||
|
||
|
||
3.3.4 kubectl的用户认证授权
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.3.5" data-path="../guide/rbac.html">
|
||
|
||
<a href="../guide/rbac.html">
|
||
|
||
|
||
3.3.5 RBAC——基于角色的访问控制
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.3.6" data-path="../guide/ip-masq-agent.html">
|
||
|
||
<a href="../guide/ip-masq-agent.html">
|
||
|
||
|
||
3.3.6 IP伪装代理
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.4" data-path="../guide/access-kubernetes-cluster.html">
|
||
|
||
<a href="../guide/access-kubernetes-cluster.html">
|
||
|
||
|
||
3.4 访问 Kubernetes 集群
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.3.4.1" data-path="../guide/access-cluster.html">
|
||
|
||
<a href="../guide/access-cluster.html">
|
||
|
||
|
||
3.4.1 访问集群
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.4.2" data-path="../guide/authenticate-across-clusters-kubeconfig.html">
|
||
|
||
<a href="../guide/authenticate-across-clusters-kubeconfig.html">
|
||
|
||
|
||
3.4.2 使用 kubeconfig 文件配置跨集群认证
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.4.3" data-path="../guide/connecting-to-applications-port-forward.html">
|
||
|
||
<a href="../guide/connecting-to-applications-port-forward.html">
|
||
|
||
|
||
3.4.3 通过端口转发访问集群中的应用程序
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.4.4" data-path="../guide/service-access-application-cluster.html">
|
||
|
||
<a href="../guide/service-access-application-cluster.html">
|
||
|
||
|
||
3.4.4 使用 service 访问群集中的应用程序
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.5" data-path="../guide/application-development-deployment-flow.html">
|
||
|
||
<a href="../guide/application-development-deployment-flow.html">
|
||
|
||
|
||
3.5 在kubernetes中开发部署应用
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.3.5.1" data-path="../guide/deploy-applications-in-kubernetes.html">
|
||
|
||
<a href="../guide/deploy-applications-in-kubernetes.html">
|
||
|
||
|
||
3.5.1 适用于kubernetes的应用开发部署流程
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.3.5.2" data-path="../guide/migrating-hadoop-yarn-to-kubernetes.html">
|
||
|
||
<a href="../guide/migrating-hadoop-yarn-to-kubernetes.html">
|
||
|
||
|
||
3.5.2 迁移传统应用到kubernetes中——以Hadoop YARN为例
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4" data-path="../practice/">
|
||
|
||
<a href="../practice/">
|
||
|
||
|
||
4. 最佳实践
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.1" data-path="../practice/install-kbernetes1.6-on-centos.html">
|
||
|
||
<a href="../practice/install-kbernetes1.6-on-centos.html">
|
||
|
||
|
||
4.1 在CentOS上部署kubernetes1.6集群
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.1.1" data-path="../practice/create-tls-and-secret-key.html">
|
||
|
||
<a href="../practice/create-tls-and-secret-key.html">
|
||
|
||
|
||
4.1.1 创建TLS证书和秘钥
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.2" data-path="../practice/create-kubeconfig.html">
|
||
|
||
<a href="../practice/create-kubeconfig.html">
|
||
|
||
|
||
4.1.2 创建kubeconfig文件
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.3" data-path="../practice/etcd-cluster-installation.html">
|
||
|
||
<a href="../practice/etcd-cluster-installation.html">
|
||
|
||
|
||
4.1.3 创建高可用etcd集群
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.4" data-path="../practice/kubectl-installation.html">
|
||
|
||
<a href="../practice/kubectl-installation.html">
|
||
|
||
|
||
4.1.4 安装kubectl命令行工具
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.5" data-path="../practice/master-installation.html">
|
||
|
||
<a href="../practice/master-installation.html">
|
||
|
||
|
||
4.1.5 部署master节点
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.6" data-path="../practice/node-installation.html">
|
||
|
||
<a href="../practice/node-installation.html">
|
||
|
||
|
||
4.1.6 部署node节点
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.7" data-path="../practice/kubedns-addon-installation.html">
|
||
|
||
<a href="../practice/kubedns-addon-installation.html">
|
||
|
||
|
||
4.1.7 安装kubedns插件
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.8" data-path="../practice/dashboard-addon-installation.html">
|
||
|
||
<a href="../practice/dashboard-addon-installation.html">
|
||
|
||
|
||
4.1.8 安装dashboard插件
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.9" data-path="../practice/heapster-addon-installation.html">
|
||
|
||
<a href="../practice/heapster-addon-installation.html">
|
||
|
||
|
||
4.1.9 安装heapster插件
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.1.10" data-path="../practice/efk-addon-installation.html">
|
||
|
||
<a href="../practice/efk-addon-installation.html">
|
||
|
||
|
||
4.1.10 安装EFK插件
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.2" data-path="../practice/service-discovery-and-loadbalancing.html">
|
||
|
||
<a href="../practice/service-discovery-and-loadbalancing.html">
|
||
|
||
|
||
4.2 服务发现与负载均衡
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.2.1" data-path="../practice/traefik-ingress-installation.html">
|
||
|
||
<a href="../practice/traefik-ingress-installation.html">
|
||
|
||
|
||
4.2.1 安装Traefik ingress
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.2.2" data-path="../practice/distributed-load-test.html">
|
||
|
||
<a href="../practice/distributed-load-test.html">
|
||
|
||
|
||
4.2.2 分布式负载测试
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.2.3" data-path="../practice/network-and-cluster-perfermance-test.html">
|
||
|
||
<a href="../practice/network-and-cluster-perfermance-test.html">
|
||
|
||
|
||
4.2.3 网络和集群性能测试
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.2.4" data-path="../practice/edge-node-configuration.html">
|
||
|
||
<a href="../practice/edge-node-configuration.html">
|
||
|
||
|
||
4.2.4 边缘节点配置
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3" data-path="../practice/operation.html">
|
||
|
||
<a href="../practice/operation.html">
|
||
|
||
|
||
4.3 运维管理
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.3.1" data-path="../practice/service-rolling-update.html">
|
||
|
||
<a href="../practice/service-rolling-update.html">
|
||
|
||
|
||
4.3.1 服务滚动升级
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3.2" data-path="../practice/app-log-collection.html">
|
||
|
||
<a href="../practice/app-log-collection.html">
|
||
|
||
|
||
4.3.2 应用日志收集
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3.3" data-path="../practice/configuration-best-practice.html">
|
||
|
||
<a href="../practice/configuration-best-practice.html">
|
||
|
||
|
||
4.3.3 配置最佳实践
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3.4" data-path="../practice/monitor.html">
|
||
|
||
<a href="../practice/monitor.html">
|
||
|
||
|
||
4.3.4 集群及应用监控
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3.5" data-path="../practice/jenkins-ci-cd.html">
|
||
|
||
<a href="../practice/jenkins-ci-cd.html">
|
||
|
||
|
||
4.3.5 使用Jenkins进行持续构建与发布
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3.6" data-path="../practice/data-persistence-problem.html">
|
||
|
||
<a href="../practice/data-persistence-problem.html">
|
||
|
||
|
||
4.3.6 数据持久化问题
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.3.7" data-path="../practice/manage-compute-resources-container.html">
|
||
|
||
<a href="../practice/manage-compute-resources-container.html">
|
||
|
||
|
||
4.3.7 管理容器的计算资源
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.4" data-path="../practice/storage.html">
|
||
|
||
<a href="../practice/storage.html">
|
||
|
||
|
||
4.4 存储管理
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.4.1" data-path="../practice/glusterfs.html">
|
||
|
||
<a href="../practice/glusterfs.html">
|
||
|
||
|
||
4.4.1 GlusterFS
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.4.1.1" data-path="../practice/using-glusterfs-for-persistent-storage.html">
|
||
|
||
<a href="../practice/using-glusterfs-for-persistent-storage.html">
|
||
|
||
|
||
4.4.1.1 使用GlusterFS做持久化存储
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.4.1.2" data-path="../practice/storage-for-containers-using-glusterfs-with-openshift.html">
|
||
|
||
<a href="../practice/storage-for-containers-using-glusterfs-with-openshift.html">
|
||
|
||
|
||
4.4.1.2 在OpenShift中使用GlusterFS做持久化存储
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.4.4.2" data-path="../practice/cephfs.html">
|
||
|
||
<a href="../practice/cephfs.html">
|
||
|
||
|
||
4.4.2 CephFS
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.4.4.2.1" data-path="../practice/using-ceph-for-persistent-storage.html">
|
||
|
||
<a href="../practice/using-ceph-for-persistent-storage.html">
|
||
|
||
|
||
4.4.2.1 使用Ceph做持久化存储
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5" data-path="../usecases/">
|
||
|
||
<a href="../usecases/">
|
||
|
||
|
||
5. 领域应用
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.5.1" data-path="../usecases/microservices.html">
|
||
|
||
<a href="../usecases/microservices.html">
|
||
|
||
|
||
5.1 微服务架构
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.5.1.1" data-path="../usecases/istio.html">
|
||
|
||
<a href="../usecases/istio.html">
|
||
|
||
|
||
5.1.1 Istio
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.5.1.1.1" data-path="../usecases/istio-installation.html">
|
||
|
||
<a href="../usecases/istio-installation.html">
|
||
|
||
|
||
5.1.1.1 安装istio
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5.1.1.2" data-path="../usecases/configuring-request-routing.html">
|
||
|
||
<a href="../usecases/configuring-request-routing.html">
|
||
|
||
|
||
5.1.1.2 配置请求的路由规则
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5.1.2" data-path="../usecases/linkerd.html">
|
||
|
||
<a href="../usecases/linkerd.html">
|
||
|
||
|
||
5.1.2 Linkerd
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.5.1.2.1" data-path="../usecases/linkerd-user-guide.html">
|
||
|
||
<a href="../usecases/linkerd-user-guide.html">
|
||
|
||
|
||
5.1.2.1 Linkerd 使用指南
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5.1.3" data-path="../usecases/service-discovery-in-microservices.html">
|
||
|
||
<a href="../usecases/service-discovery-in-microservices.html">
|
||
|
||
|
||
5.1.3 微服务中的服务发现
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5.2" data-path="../usecases/big-data.html">
|
||
|
||
<a href="../usecases/big-data.html">
|
||
|
||
|
||
5.2 大数据
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.5.2.1" data-path="../usecases/spark-standalone-on-kubernetes.html">
|
||
|
||
<a href="../usecases/spark-standalone-on-kubernetes.html">
|
||
|
||
|
||
5.2.1 Spark standalone on Kubernetes
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5.2.2" data-path="../usecases/running-spark-with-kubernetes-native-scheduler.html">
|
||
|
||
<a href="../usecases/running-spark-with-kubernetes-native-scheduler.html">
|
||
|
||
|
||
5.2.2 运行支持kubernetes原生调度的Spark程序
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.5.3" data-path="../usecases/serverless.html">
|
||
|
||
<a href="../usecases/serverless.html">
|
||
|
||
|
||
5.3 Serverless架构
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.6" data-path="./">
|
||
|
||
<a href="./">
|
||
|
||
|
||
6. 开发指南
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.6.1" data-path="developing-environment.html">
|
||
|
||
<a href="developing-environment.html">
|
||
|
||
|
||
6.1 开发环境搭建
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.6.2" data-path="testing.html">
|
||
|
||
<a href="testing.html">
|
||
|
||
|
||
6.2 单元测试和集成测试
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter active" data-level="1.6.3" data-path="client-go-sample.html">
|
||
|
||
<a href="client-go-sample.html">
|
||
|
||
|
||
6.3 client-go示例
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.6.4" data-path="contribute.html">
|
||
|
||
<a href="contribute.html">
|
||
|
||
|
||
6.4 社区贡献
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.7" data-path="../appendix/">
|
||
|
||
<a href="../appendix/">
|
||
|
||
|
||
7. 附录
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<ul class="articles">
|
||
|
||
|
||
<li class="chapter " data-level="1.7.1" data-path="../appendix/docker-best-practice.html">
|
||
|
||
<a href="../appendix/docker-best-practice.html">
|
||
|
||
|
||
7.1 Docker最佳实践
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.7.2" data-path="../appendix/issues.html">
|
||
|
||
<a href="../appendix/issues.html">
|
||
|
||
|
||
7.2 问题记录
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
<li class="chapter " data-level="1.7.3" data-path="../appendix/tricks.html">
|
||
|
||
<a href="../appendix/tricks.html">
|
||
|
||
|
||
7.3 使用技巧
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
<li class="divider"></li>
|
||
|
||
<li>
|
||
<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
|
||
本書使用 GitBook 釋出
|
||
</a>
|
||
</li>
|
||
</ul>
|
||
|
||
|
||
</nav>
|
||
|
||
|
||
</div>
|
||
|
||
<div class="book-body">
|
||
|
||
<div class="body-inner">
|
||
|
||
|
||
|
||
<div class="book-header" role="navigation">
|
||
|
||
|
||
<!-- Title -->
|
||
<h1>
|
||
<i class="fa fa-circle-o-notch fa-spin"></i>
|
||
<a href=".." >6.3 client-go示例</a>
|
||
</h1>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
<div class="page-wrapper" tabindex="-1" role="main">
|
||
<div class="page-inner">
|
||
|
||
<div class="search-plus" id="book-search-results">
|
||
<div class="search-noresults">
|
||
|
||
<section class="normal markdown-section">
|
||
|
||
<h1 id="client-go示例">client-go示例</h1>
|
||
<p>访问kubernetes集群有几下几种方式：</p>
|
||
<table>
|
||
<thead>
|
||
<tr>
|
||
<th>方式</th>
|
||
<th>特点</th>
|
||
<th>支持者</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td>Kubernetes dashboard</td>
|
||
<td>直接通过Web UI进行操作，简单直接，可定制化程度低</td>
|
||
<td>官方支持</td>
|
||
</tr>
|
||
<tr>
|
||
<td>kubectl</td>
|
||
<td>命令行操作，功能最全，但是比较复杂，适合对其进行进一步的分装，定制功能，版本适配最好</td>
|
||
<td>官方支持</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="https://github.com/kubernetes/client-go" target="_blank">client-go</a></td>
|
||
<td>从kubernetes的代码中抽离出来的客户端包，简单易用，但需要小心区分kubernetes的API版本</td>
|
||
<td>官方支持</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="https://github.com/kubernetes-incubator/client-python" target="_blank">client-python</a></td>
|
||
<td>python客户端，kubernetes-incubator</td>
|
||
<td>官方支持</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="https://github.com/fabric8io/kubernetes-client" target="_blank">Java client</a></td>
|
||
<td>fabric8中的一部分，kubernetes的java客户端</td>
|
||
<td>redhat</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<p>下面，我们基于<a href="https://github.com/kubernetes/client-go" target="_blank">client-go</a>，对Deployment升级镜像的步骤进行了定制，通过命令行传递一个Deployment的名字、应用容器名和新image名字的方式来升级。代码和使用方式见 <a href="https://github.com/rootsongjc/kubernetes-client-go-sample" target="_blank">https://github.com/rootsongjc/kubernetes-client-go-sample</a> 。</p>
|
||
<h2 id="kubernetes-client-go-sample">kubernetes-client-go-sample</h2>
|
||
<p>代码如下：</p>
|
||
<pre><code class="lang-Go"><span class="hljs-keyword">package</span> main
|
||
|
||
<span class="hljs-keyword">import</span> (
|
||
<span class="hljs-string">"flag"</span>
|
||
<span class="hljs-string">"fmt"</span>
|
||
<span class="hljs-string">"os"</span>
|
||
<span class="hljs-string">"path/filepath"</span>
|
||
|
||
<span class="hljs-string">"k8s.io/apimachinery/pkg/api/errors"</span>
|
||
metav1 <span class="hljs-string">"k8s.io/apimachinery/pkg/apis/meta/v1"</span>
|
||
<span class="hljs-string">"k8s.io/client-go/kubernetes"</span>
|
||
<span class="hljs-string">"k8s.io/client-go/tools/clientcmd"</span>
|
||
)
|
||
|
||
<span class="hljs-keyword">func</span> main() {
|
||
<span class="hljs-keyword">var</span> kubeconfig *<span class="hljs-keyword">string</span>
|
||
<span class="hljs-keyword">if</span> home := homeDir(); home != <span class="hljs-string">""</span> {
|
||
kubeconfig = flag.String(<span class="hljs-string">"kubeconfig"</span>, filepath.Join(home, <span class="hljs-string">".kube"</span>, <span class="hljs-string">"config"</span>), <span class="hljs-string">"(optional) absolute path to the kubeconfig file"</span>)
|
||
} <span class="hljs-keyword">else</span> {
|
||
kubeconfig = flag.String(<span class="hljs-string">"kubeconfig"</span>, <span class="hljs-string">""</span>, <span class="hljs-string">"absolute path to the kubeconfig file"</span>)
|
||
}
|
||
deploymentName := flag.String(<span class="hljs-string">"deployment"</span>, <span class="hljs-string">""</span>, <span class="hljs-string">"deployment name"</span>)
|
||
imageName := flag.String(<span class="hljs-string">"image"</span>, <span class="hljs-string">""</span>, <span class="hljs-string">"new image name"</span>)
|
||
appName := flag.String(<span class="hljs-string">"app"</span>, <span class="hljs-string">"app"</span>, <span class="hljs-string">"application name"</span>)
|
||
|
||
flag.Parse()
|
||
<span class="hljs-keyword">if</span> *deploymentName == <span class="hljs-string">""</span> {
|
||
fmt.Println(<span class="hljs-string">"You must specify the deployment name."</span>)
|
||
os.Exit(<span class="hljs-number">0</span>)
|
||
}
|
||
<span class="hljs-keyword">if</span> *imageName == <span class="hljs-string">""</span> {
|
||
fmt.Println(<span class="hljs-string">"You must specify the new image name."</span>)
|
||
os.Exit(<span class="hljs-number">0</span>)
|
||
}
|
||
<span class="hljs-comment">// use the current context in kubeconfig</span>
|
||
config, err := clientcmd.BuildConfigFromFlags(<span class="hljs-string">""</span>, *kubeconfig)
|
||
<span class="hljs-keyword">if</span> err != <span class="hljs-literal">nil</span> {
|
||
<span class="hljs-built_in">panic</span>(err.Error())
|
||
}
|
||
|
||
<span class="hljs-comment">// create the clientset</span>
|
||
clientset, err := kubernetes.NewForConfig(config)
|
||
<span class="hljs-keyword">if</span> err != <span class="hljs-literal">nil</span> {
|
||
<span class="hljs-built_in">panic</span>(err.Error())
|
||
}
|
||
deployment, err := clientset.AppsV1beta1().Deployments(<span class="hljs-string">"default"</span>).Get(*deploymentName, metav1.GetOptions{})
|
||
<span class="hljs-keyword">if</span> err != <span class="hljs-literal">nil</span> {
|
||
<span class="hljs-built_in">panic</span>(err.Error())
|
||
}
|
||
<span class="hljs-keyword">if</span> errors.IsNotFound(err) {
|
||
fmt.Printf(<span class="hljs-string">"Deployment not found\n"</span>)
|
||
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> statusError, isStatus := err.(*errors.StatusError); isStatus {
|
||
fmt.Printf(<span class="hljs-string">"Error getting deployment%v\n"</span>, statusError.ErrStatus.Message)
|
||
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> err != <span class="hljs-literal">nil</span> {
|
||
<span class="hljs-built_in">panic</span>(err.Error())
|
||
} <span class="hljs-keyword">else</span> {
|
||
fmt.Printf(<span class="hljs-string">"Found deployment\n"</span>)
|
||
name := deployment.GetName()
|
||
fmt.Println(<span class="hljs-string">"name ->"</span>, name)
|
||
containers := &deployment.Spec.Template.Spec.Containers
|
||
found := <span class="hljs-literal">false</span>
|
||
<span class="hljs-keyword">for</span> i := <span class="hljs-keyword">range</span> *containers {
|
||
c := *containers
|
||
<span class="hljs-keyword">if</span> c[i].Name == *appName {
|
||
found = <span class="hljs-literal">true</span>
|
||
fmt.Println(<span class="hljs-string">"Old image ->"</span>, c[i].Image)
|
||
fmt.Println(<span class="hljs-string">"New image ->"</span>, *imageName)
|
||
c[i].Image = *imageName
|
||
}
|
||
}
|
||
<span class="hljs-keyword">if</span> found == <span class="hljs-literal">false</span> {
|
||
fmt.Println(<span class="hljs-string">"The application container not exist in the deployment pods."</span>)
|
||
os.Exit(<span class="hljs-number">0</span>)
|
||
}
|
||
_, err := clientset.AppsV1beta1().Deployments(<span class="hljs-string">"default"</span>).Update(deployment)
|
||
<span class="hljs-keyword">if</span> err != <span class="hljs-literal">nil</span> {
|
||
<span class="hljs-built_in">panic</span>(err.Error())
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="hljs-keyword">func</span> homeDir() <span class="hljs-keyword">string</span> {
|
||
<span class="hljs-keyword">if</span> h := os.Getenv(<span class="hljs-string">"HOME"</span>); h != <span class="hljs-string">""</span> {
|
||
<span class="hljs-keyword">return</span> h
|
||
}
|
||
<span class="hljs-keyword">return</span> os.Getenv(<span class="hljs-string">"USERPROFILE"</span>) <span class="hljs-comment">// windows</span>
|
||
}
|
||
</code></pre>
|
||
<p>我们使用<code>kubeconfig</code>文件认证连接kubernetes集群，该文件默认的位置是<code>$HOME/.kube/config</code>。</p>
|
||
<p>该代码编译后可以直接在kubernetes集群之外，任何一个可以连接到API server的机器上运行。</p>
|
||
<p><strong>编译运行</strong></p>
|
||
<pre><code class="lang-bash">$ go get github.com/rootsongjc/kubernetes-client-go-sample
|
||
$ <span class="hljs-built_in">cd</span> <span class="hljs-variable">$GOPATH</span>/src/github.com/rootsongjc/kubernetes-client-go-sample
|
||
$ make
|
||
$ ./update-deployment-image -h
|
||
Usage of ./update-deployment-image:
|
||
-alsologtostderr
|
||
<span class="hljs-built_in">log</span> to standard error as well as files
|
||
-app string
|
||
application name (default <span class="hljs-string">"app"</span>)
|
||
-deployment string
|
||
deployment name
|
||
-image string
|
||
new image name
|
||
-kubeconfig string
|
||
(optional) absolute path to the kubeconfig file (default <span class="hljs-string">"/Users/jimmy/.kube/config"</span>)
|
||
-log_backtrace_at value
|
||
when logging hits line file:N, emit a stack trace
|
||
-log_dir string
|
||
If non-empty, write <span class="hljs-built_in">log</span> files <span class="hljs-keyword">in</span> this directory
|
||
-logtostderr
|
||
<span class="hljs-built_in">log</span> to standard error instead of files
|
||
-stderrthreshold value
|
||
logs at or above this threshold go to stderr
|
||
-v value
|
||
<span class="hljs-built_in">log</span> level <span class="hljs-keyword">for</span> V logs
|
||
-vmodule value
|
||
comma-separated list of pattern=N settings <span class="hljs-keyword">for</span> file-filtered logging
|
||
</code></pre>
|
||
<p><strong>使用不存在的image更新</strong></p>
|
||
<pre><code class="lang-bash"> $ ./update-deployment-image -deployment filebeat-test -image sz-pg-oam-docker-hub-001.tendcloud.com/library/analytics-docker-test:Build_9
|
||
Found deployment
|
||
name -> filebeat-test
|
||
Old image -> sz-pg-oam-docker-hub-001.tendcloud.com/library/analytics-docker-test:Build_8
|
||
New image -> sz-pg-oam-docker-hub-001.tendcloud.com/library/analytics-docker-test:Build_9
|
||
</code></pre>
|
||
<p>查看Deployment的event。</p>
|
||
<pre><code class="lang-Bash">$ kubectl describe deployment filebeat-test
|
||
Name: filebeat-test
|
||
Namespace: default
|
||
CreationTimestamp: Fri, 19 May 2017 15:12:28 +0800
|
||
Labels: k8s-app=filebeat-test
|
||
Selector: k8s-app=filebeat-test
|
||
Replicas: 2 updated | 3 total | 2 available | 2 unavailable
|
||
StrategyType: RollingUpdate
|
||
M<span class="hljs-keyword">in</span>ReadySeconds: 0
|
||
RollingUpdateStrategy: 1 max unavailable, 1 max surge
|
||
Conditions:
|
||
Type Status Reason
|
||
---- ------ ------
|
||
Available True MinimumReplicasAvailable
|
||
Progressing True ReplicaSetUpdated
|
||
OldReplicaSets: filebeat-test-2365467882 (2/2 replicas created)
|
||
NewReplicaSet: filebeat-test-2470325483 (2/2 replicas created)
|
||
Events:
|
||
FirstSeen LastSeen Count From SubObjectPath Type ReasoMessage
|
||
--------- -------- ----- ---- ------------- -------- ------------
|
||
2h 1m 3 {deployment-controller } Normal ScalingReplicaSet Scaled down replica <span class="hljs-built_in">set</span> filebeat-test-2365467882 to 2
|
||
1m 1m 1 {deployment-controller } Normal ScalingReplicaSet Scaled up replica <span class="hljs-built_in">set</span> filebeat-test-2470325483 to 1
|
||
1m 1m 1 {deployment-controller } Normal ScalingReplicaSet Scaled up replica <span class="hljs-built_in">set</span> filebeat-test-2470325483 to 2
|
||
</code></pre>
|
||
<p>可以看到老的ReplicaSet从3个replica减少到了2个，有2个使用新配置的replica不可用，目前可用的replica是2个。</p>
|
||
<p>这是因为我们指定的镜像不存在，查看Deployment的pod的状态。</p>
|
||
<pre><code class="lang-bash">$ kubectl get pods <span class="hljs-_">-l</span> k8s-app=filebeat-test
|
||
NAME READY STATUS RESTARTS AGE
|
||
filebeat-test-2365467882-4zwx8 2/2 Running 0 33d
|
||
filebeat-test-2365467882-rqskl 2/2 Running 0 33d
|
||
filebeat-test-2470325483-6vjbw 1/2 ImagePullBackOff 0 4m
|
||
filebeat-test-2470325483-gc14k 1/2 ImagePullBackOff 0 4m
|
||
</code></pre>
|
||
<p>我们可以看到有两个pod正在拉取image。</p>
|
||
<p><strong>还原为原先的镜像</strong></p>
|
||
<p>将image设置为原来的镜像。</p>
|
||
<pre><code class="lang-bash">$ ./update-deployment-image -deployment filebeat-test -image sz-pg-oam-docker-hub-001.tendcloud.com/library/analytics-docker-test:Build_8
|
||
Found deployment
|
||
name -> filebeat-test
|
||
Old image -> sz-pg-oam-docker-hub-001.tendcloud.com/library/analytics-docker-test:Build_9
|
||
New image -> sz-pg-oam-docker-hub-001.tendcloud.com/library/analytics-docker-test:Build_8
|
||
</code></pre>
|
||
<p>现在再查看Deployment的状态。</p>
|
||
<pre><code class="lang-bash">$ kubectl describe deployment filebeat-test
|
||
Name: filebeat-test
|
||
Namespace: default
|
||
CreationTimestamp: Fri, 19 May 2017 15:12:28 +0800
|
||
Labels: k8s-app=filebeat-test
|
||
Selector: k8s-app=filebeat-test
|
||
Replicas: 3 updated | 3 total | 3 available | 0 unavailable
|
||
StrategyType: RollingUpdate
|
||
M<span class="hljs-keyword">in</span>ReadySeconds: 0
|
||
RollingUpdateStrategy: 1 max unavailable, 1 max surge
|
||
Conditions:
|
||
Type Status Reason
|
||
---- ------ ------
|
||
Available True MinimumReplicasAvailable
|
||
Progressing True NewReplicaSetAvailable
|
||
OldReplicaSets: <none>
|
||
NewReplicaSet: filebeat-test-2365467882 (3/3 replicas created)
|
||
Events:
|
||
FirstSeen LastSeen Count From SubObjectPath Type ReasoMessage
|
||
--------- -------- ----- ---- ------------- -------- ------------
|
||
2h 8m 3 {deployment-controller } Normal ScalingReplicaSet Scaled down replica <span class="hljs-built_in">set</span> filebeat-test-2365467882 to 2
|
||
8m 8m 1 {deployment-controller } Normal ScalingReplicaSet Scaled up replica <span class="hljs-built_in">set</span> filebeat-test-2470325483 to 1
|
||
8m 8m 1 {deployment-controller } Normal ScalingReplicaSet Scaled up replica <span class="hljs-built_in">set</span> filebeat-test-2470325483 to 2
|
||
2h 1m 3 {deployment-controller } Normal ScalingReplicaSet Scaled up replica <span class="hljs-built_in">set</span> filebeat-test-2365467882 to 3
|
||
1m 1m 1 {deployment-controller } Normal ScalingReplicaSet Scaled down replica <span class="hljs-built_in">set</span> filebeat-test-2470325483 to 0
|
||
</code></pre>
|
||
<p>可以看到available的replica个数恢复成3了。</p>
|
||
<p>其实在使用该命令的过程中，通过kubernetes dashboard的页面上查看Deployment的状态更直观，更加方便故障排查。</p>
|
||
<figure id="fig1.6.3.1"><img src="../images/kubernetes-client-go-sample-update.jpg" alt="使用kubernetes dashboard进行故障排查"><figcaption>Figure: 使用kubernetes dashboard进行故障排查</figcaption></figure>
|
||
<p>这也是dashboard最大的优势，简单、直接、高效。 </p>
|
||
<footer class="page-footer-ex"> <span class="page-footer-ex-copyright">for GitBook</span>           <span class="page-footer-ex-footer-update">update
|
||
2017-08-21 18:23:34
|
||
</span></footer>
|
||
|
||
</section>
|
||
|
||
</div>
|
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<div class="search-results">
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<div class="has-results">
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<h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>
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</div>
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