2017-08-21 18:44:34 +08:00
<!DOCTYPE HTML>
< html lang = "zh-cn" >
< head >
< meta charset = "UTF-8" >
< meta content = "text/html; charset=utf-8" http-equiv = "Content-Type" >
< title > 5.1 微服务架构 · Kubernetes Handbook< / title >
< meta http-equiv = "X-UA-Compatible" content = "IE=edge" / >
< meta name = "description" content = "" >
< meta name = "generator" content = "GitBook 3.2.2" >
< meta name = "author" content = "Jimmy Song" >
< link rel = "stylesheet" href = "../gitbook/style.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-splitter/splitter.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-page-toc-button/plugin.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-image-captions/image-captions.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-page-footer-ex/style/plugin.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-search-plus/search.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-highlight/website.css" >
< link rel = "stylesheet" href = "../gitbook/gitbook-plugin-fontsettings/website.css" >
< meta name = "HandheldFriendly" content = "true" / >
< meta name = "viewport" content = "width=device-width, initial-scale=1, user-scalable=no" >
< meta name = "apple-mobile-web-app-capable" content = "yes" >
< meta name = "apple-mobile-web-app-status-bar-style" content = "black" >
< link rel = "apple-touch-icon-precomposed" sizes = "152x152" href = "../gitbook/images/apple-touch-icon-precomposed-152.png" >
< link rel = "shortcut icon" href = "../gitbook/images/favicon.ico" type = "image/x-icon" >
< link rel = "next" href = "istio.html" / >
< link rel = "prev" href = "./" / >
< / head >
< body >
< div class = "book" >
< div class = "book-summary" >
< div id = "book-search-input" role = "search" >
< input type = "text" placeholder = "輸入並搜尋" / >
< / div >
< nav role = "navigation" >
< ul class = "summary" >
< li class = "chapter " data-level = "1.1" data-path = "../" >
< a href = "../" >
1. 前言
< / a >
< / li >
< li class = "chapter " data-level = "1.2" data-path = "../concepts/" >
< a href = "../concepts/" >
2. 概念原理
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.2.1" data-path = "../concepts/concepts.html" >
< a href = "../concepts/concepts.html" >
2.1 设计理念
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2" data-path = "../concepts/objects.html" >
< a href = "../concepts/objects.html" >
2.2 主要概念
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.2.2.1" data-path = "../concepts/pod-overview.html" >
< a href = "../concepts/pod-overview.html" >
2.2.1 Pod
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.2.2.1.1" data-path = "../concepts/pod.html" >
< a href = "../concepts/pod.html" >
2.2.1.1 Pod解析
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1.2.2.2" data-path = "../concepts/node.html" >
< a href = "../concepts/node.html" >
2.2.2 Node
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.3" data-path = "../concepts/namespace.html" >
< a href = "../concepts/namespace.html" >
2.2.3 Namespace
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.4" data-path = "../concepts/service.html" >
< a href = "../concepts/service.html" >
2.2.4 Service
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.5" data-path = "../concepts/volume.html" >
< a href = "../concepts/volume.html" >
2.2.5 Volume和Persistent Volume
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.6" data-path = "../concepts/deployment.html" >
< a href = "../concepts/deployment.html" >
2.2.6 Deployment
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.7" data-path = "../concepts/secret.html" >
< a href = "../concepts/secret.html" >
2.2.7 Secret
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.8" data-path = "../concepts/statefulset.html" >
< a href = "../concepts/statefulset.html" >
2.2.8 StatefulSet
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.9" data-path = "../concepts/daemonset.html" >
< a href = "../concepts/daemonset.html" >
2.2.9 DaemonSet
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.10" data-path = "../concepts/serviceaccount.html" >
< a href = "../concepts/serviceaccount.html" >
2.2.10 ServiceAccount
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.11" data-path = "../concepts/replicaset.html" >
< a href = "../concepts/replicaset.html" >
2.2.11 ReplicationController和ReplicaSet
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.12" data-path = "../concepts/job.html" >
< a href = "../concepts/job.html" >
2.2.12 Job
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.13" data-path = "../concepts/cronjob.html" >
< a href = "../concepts/cronjob.html" >
2.2.13 CronJob
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.14" data-path = "../concepts/ingress.html" >
< a href = "../concepts/ingress.html" >
2.2.14 Ingress
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.15" data-path = "../concepts/configmap.html" >
< a href = "../concepts/configmap.html" >
2.2.15 ConfigMap
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.16" data-path = "../concepts/horizontal-pod-autoscaling.html" >
< a href = "../concepts/horizontal-pod-autoscaling.html" >
2.2.16 Horizontal Pod Autoscaling
< / a >
< / li >
< li class = "chapter " data-level = "1.2.2.17" data-path = "../concepts/label.html" >
< a href = "../concepts/label.html" >
2.2.17 Label
< / a >
< / li >
< / ul >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1.3" data-path = "../guide/" >
< a href = "../guide/" >
3. 用户指南
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.3.1" data-path = "../guide/resource-configuration.html" >
< 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 >
< / 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-management.html" >
< a href = "../guide/cluster-management.html" >
3.3 集群管理
< / 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 >
< / 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 >
< / 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 >
< / ul >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1.5" data-path = "./" >
< a href = "./" >
5. 领域应用
< / a >
< ul class = "articles" >
< li class = "chapter active" data-level = "1.5.1" data-path = "microservices.html" >
< a href = "microservices.html" >
5.1 微服务架构
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.5.1.1" data-path = "istio.html" >
< a href = "istio.html" >
5.1.1 Istio
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.5.1.1.1" data-path = "istio-installation.html" >
< a href = "istio-installation.html" >
5.1.1.1 安装istio
< / a >
< / li >
< li class = "chapter " data-level = "1.5.1.1.2" data-path = "configuring-request-routing.html" >
< a href = "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 = "linkerd.html" >
< a href = "linkerd.html" >
5.1.2 Linkerd
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.5.1.2.1" data-path = "linkerd-user-guide.html" >
< a href = "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 = "service-discovery-in-microservices.html" >
< a href = "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 = "big-data.html" >
< a href = "big-data.html" >
5.2 大数据
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.5.2.1" data-path = "spark-on-kubernetes.html" >
< a href = "spark-on-kubernetes.html" >
5.2.1 Spark on Kubernetes
< / a >
< / li >
< / ul >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1.6" data-path = "../develop/" >
< a href = "../develop/" >
6. 开发指南
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.6.1" data-path = "../develop/developing-environment.html" >
< a href = "../develop/developing-environment.html" >
6.1 开发环境搭建
< / a >
< / li >
< li class = "chapter " data-level = "1.6.2" data-path = "../develop/testing.html" >
< a href = "../develop/testing.html" >
6.2 单元测试和集成测试
< / a >
< / li >
< li class = "chapter " data-level = "1.6.3" data-path = "../develop/client-go-sample.html" >
< a href = "../develop/client-go-sample.html" >
6.3 client-go示例
< / a >
< / li >
< li class = "chapter " data-level = "1.6.4" data-path = "../develop/contribute.html" >
< a href = "../develop/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 = ".." > 5.1 微服务架构< / 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 = "微服务架构" > 微 服 务 架 构 < / h1 >
2017-08-25 19:02:14 +08:00
< p > Kubernetes 设 计 之 初 就 是 按 照 Cloud Native 的 理 念 设 计 的 ， Cloud Native 中 有 个 重 要 概 念 就 是 微 服 务 的 架 构 设 计 ， 当 将 单 体 应 用 拆 分 微 服 务 后 ， 随 着 服 务 数 量 的 增 多 ， 如 何 微 服 务 进 行 管 理 以 保 证 服 务 的 SLA 呢 ？ 为 了 从 架 构 层 面 上 解 决 这 个 问 题 ， 解 放 程 序 员 的 创 造 性 ， 避 免 繁 琐 的 服 务 发 现 、 监 控 、 分 布 式 追 踪 等 事 务 ， Service mesh 应 运 而 生 。 < / p >
< h2 id = "什么是-service-mesh？" > 什 么 是 service mesh？ < / h2 >
< p > Service mesh 有 如 下 几 个 特 点 ： < / p >
2017-08-21 18:44:34 +08:00
< ul >
2017-08-25 19:02:14 +08:00
< li > 应 用 程 序 间 通 讯 的 中 间 层 < / li >
< li > 轻 量 级 网 络 代 理 < / li >
< li > 应 用 程 序 无 感 知 < / li >
< li > 解 耦 应 用 程 序 的 重 试 /超 时 、 监 控 、 追 踪 和 服 务 发 现 < / li >
2017-08-21 18:44:34 +08:00
< / ul >
2017-08-25 19:02:14 +08:00
< p > 目 前 两 款 流 行 的 service mesh 开 源 软 件 < a href = "https://istio.io" target = "_blank" > Istio< / a > 和 < a href = "https://linkerd.io" target = "_blank" > Linkerd< / a > 都 可 以 直 接 在 kubernetes 中 集 成 ， 其 中 Linkerd 已 经 成 为 CNCF 成 员 。 < / p >
< h2 id = "service-mesh如何工作？" > Service mesh如 何 工 作 ？ < / h2 >
< p > 下 面 以 Linkerd 为 例 讲 解 service mesh 如 何 工 作 ， Istio 作 为 service mesh 的 另 一 种 实 现 原 理 与 linkerd 基 本 类 似 ， 后 续 文 章 将 会 详 解 Istio 和 Linkerd 如 何 在 kubernetes 中 工 作 。 < / p >
< ol >
< li > Linkerd 将 服 务 请 求 路 由 到 目 的 地 址 ， 根 据 中 的 参 数 判 断 是 到 生 产 环 境 、 测 试 环 境 还 是 staging 环 境 中 的 服 务 （ 服 务 可 能 同 时 部 署 在 这 三 个 环 境 中 ） ， 是 路 由 到 本 地 环 境 还 是 公 有 云 环 境 ？ 所 有 的 这 些 路 由 信 息 可 以 动 态 配 置 ， 可 以 是 全 局 配 置 也 可 以 为 某 些 服 务 单 独 配 置 。 < / li >
< li > 当 Linkerd 确 认 了 目 的 地 址 后 ， 将 流 量 发 送 到 相 应 服 务 发 现 端 点 ， 在 kubernetes 中 是 service， 然 后 service 会 将 服 务 转 发 给 后 端 的 实 例 。 < / li >
< li > Linkerd 根 据 它 观 测 到 最 近 请 求 的 延 迟 时 间 ， 选 择 出 所 有 应 用 程 序 的 实 例 中 响 应 最 快 的 实 例 。 < / li >
< li > Linkerd 将 请 求 发 送 给 该 实 例 ， 同 时 记 录 响 应 类 型 和 延 迟 数 据 。 < / li >
< li > 如 果 该 实 例 挂 了 、 不 响 应 了 或 者 进 程 不 工 作 了 ， Linkerd 将 把 请 求 发 送 到 其 他 实 例 上 重 试 。 < / li >
< li > 如 果 该 实 例 持 续 返 回 error， Linkerd 会 将 该 实 例 从 负 载 均 衡 池 中 移 除 ， 稍 后 再 周 期 性 得 重 试 。 < / li >
< li > 如 果 请 求 的 截 止 时 间 已 过 ， Linkerd 主 动 失 败 该 请 求 ， 而 不 是 再 次 尝 试 添 加 负 载 。 < / li >
< li > Linkerd 以 metric 和 分 布 式 追 踪 的 形 式 捕 获 上 述 行 为 的 各 个 方 面 ， 这 些 追 踪 信 息 将 发 送 到 集 中 metric 系 统 。 < / li >
< / ol >
< h2 id = "为何使用-service-mesh？" > 为 何 使 用 service mesh？ < / h2 >
< p > Service mesh 并 没 有 给 我 们 带 来 新 功 能 ， 它 是 用 于 解 决 其 他 工 具 已 经 解 决 过 的 问 题 ， 只 不 过 这 次 是 在 Cloud Native 的 kubernetes 环 境 下 的 实 现 。 < / p >
< p > 在 传 统 的 MVC 三 层 Web 应 用 程 序 架 构 下 ， 服 务 之 间 的 通 讯 并 不 复 杂 ， 在 应 用 程 序 内 部 自 己 管 理 即 可 ， 但 是 在 现 今 的 复 杂 的 大 型 网 站 情 况 下 ， 单 体 应 用 被 分 解 为 众 多 的 微 服 务 ， 服 务 之 间 的 依 赖 和 通 讯 十 分 复 杂 ， 出 现 了 twitter 开 发 的 < a href = "https://twitter.github.io/finagle/" target = "_blank" > Finagle< / a > 、 Netflix 开 发 的 < a href = "https://github.com/Netflix/Hystrix" target = "_blank" > Hystrix< / a > 和 Google 的 Stubby 这 样 的 ” 胖 客 户 端 “ 库 ， 这 些 就 是 早 期 的 service mesh， 但 是 它 们 都 近 适 用 于 特 定 的 环 境 和 特 定 的 开 发 语 言 ， 并 不 能 作 为 平 台 级 的 service mesh 支 持 。 < / p >
< p > 在 Cloud Native 架 构 下 ， 容 器 的 使 用 给 予 了 异 构 应 用 程 序 的 更 多 可 行 性 ， kubernetes 增 强 的 应 用 的 横 向 扩 容 能 力 ， 用 户 可 以 快 速 的 编 排 出 复 杂 环 境 、 复 杂 依 赖 关 系 的 应 用 程 序 ， 同 时 开 发 者 又 无 须 过 分 关 心 应 用 程 序 的 监 控 、 扩 展 性 、 服 务 发 现 和 分 布 式 追 踪 这 些 繁 琐 的 事 情 而 专 注 于 程 序 开 发 ， 赋 予 开 发 者 更 多 的 创 造 性 。 < / p >
< h2 id = "参考" > 参 考 < / h2 >
< p > < a href = "https://buoyant.io/2017/04/25/whats-a-service-mesh-and-why-do-i-need-one/" target = "_blank" > WHAT’ S A SERVICE MESH? AND WHY DO I NEED ONE?< / a > < / p >
< p > < a href = "http://redmonk.com/jgovernor/2017/05/31/so-what-even-is-a-service-mesh-hot-take-on-istio-and-linkerd" target = "_blank" > So what even is a Service Mesh? Hot take on Istio and Linkerd< / a > < / p >
< p > < a href = "https://medium.com/attest-engineering/linkerd-a-service-mesh-for-aws-ecs-937f201f847a" target = "_blank" > linkerd: A service mesh for AWS ECS< / a > < / p >
< p > < a href = "https://istio.io/blog/istio-service-mesh-for-microservices.html" target = "_blank" > Introducing Istio: A robust service mesh for microservices< / a > < / p >
< p > < a href = "http://blog.christianposta.com/microservices/application-network-functions-with-esbs-api-management-and-now-service-mesh/" target = "_blank" > Application Network Functions With ESBs, API Management, and Now.. Service Mesh?< / a > < / p >
2017-08-21 18:44:34 +08:00
< footer class = "page-footer-ex" > < span class = "page-footer-ex-copyright" > for GitBook< / span >                       < span class = "page-footer-ex-footer-update" > update
2017-08-25 19:02:14 +08:00
2017-08-25 18:59:22
2017-08-21 18:44:34 +08:00
< / span > < / footer >
< / section >
< / div >
< div class = "search-results" >
< div class = "has-results" >
< h1 class = "search-results-title" > < span class = 'search-results-count' > < / span > results matching "< span class = 'search-query' > < / span > "< / h1 >
< ul class = "search-results-list" > < / ul >
< / div >
< div class = "no-results" >
< h1 class = "search-results-title" > No results matching "< span class = 'search-query' > < / span > "< / h1 >
< / div >
< / div >
< / div >
< / div >
< / div >
< / div >
< a href = "./" class = "navigation navigation-prev " aria-label = "Previous page: 5. 领域应用" >
< i class = "fa fa-angle-left" > < / i >
< / a >
< a href = "istio.html" class = "navigation navigation-next " aria-label = "Next page: 5.1.1 Istio" >
< i class = "fa fa-angle-right" > < / i >
< / a >
< / div >
< script >
var gitbook = gitbook || [];
gitbook.push(function() {
2017-08-29 12:23:54 +08:00
gitbook.page.hasChanged({"page":{"title":"5.1 微服务架构","level":"1.5.1","depth":2,"next":{"title":"5.1.1 Istio","level":"1.5.1.1","depth":3,"path":"usecases/istio.md","ref":"usecases/istio.md","articles":[{"title":"5.1.1.1 安装istio","level":"1.5.1.1.1","depth":4,"path":"usecases/istio-installation.md","ref":"usecases/istio-installation.md","articles":[]},{"title":"5.1.1.2 配置请求的路由规则","level":"1.5.1.1.2","depth":4,"path":"usecases/configuring-request-routing.md","ref":"usecases/configuring-request-routing.md","articles":[]}]},"previous":{"title":"5. 领域应用","level":"1.5","depth":1,"path":"usecases/index.md","ref":"usecases/index.md","articles":[{"title":"5.1 微服务架构","level":"1.5.1","depth":2,"path":"usecases/microservices.md","ref":"usecases/microservices.md","articles":[{"title":"5.1.1 Istio","level":"1.5.1.1","depth":3,"path":"usecases/istio.md","ref":"usecases/istio.md","articles":[{"title":"5.1.1.1 安装istio","level":"1.5.1.1.1","depth":4,"path":"usecases/istio-installation.md","ref":"usecases/istio-installation.md","articles":[]},{"title":"5.1.1.2 配置请求的路由规则","level":"1.5.1.1.2","depth":4,"path":"usecases/configuring-request-routing.md","ref":"usecases/configuring-request-routing.md","articles":[]}]},{"title":"5.1.2 Linkerd","level":"1.5.1.2","depth":3,"path":"usecases/linkerd.md","ref":"usecases/linkerd.md","articles":[{"title":"5.1.2.1 Linkerd 使用指南","level":"1.5.1.2.1","depth":4,"path":"usecases/linkerd-user-guide.md","ref":"usecases/linkerd-user-guide.md","articles":[]}]},{"title":"5.1.3 微服务中的服务发现","level":"1.5.1.3","depth":3,"path":"usecases/service-discovery-in-microservices.md","ref":"usecases/service-discovery-in-microservices.md","articles":[]}]},{"title":"5.2 大数据","level":"1.5.2","depth":2,"path":"usecases/big-data.md","ref":"usecases/big-data.md","articles":[{"title":"5.2.1 Spark on Kubernetes","level":"1.5.2.1","depth":3,"path":"usecases/spark-on-kubernetes.md","ref":"usecases/spark-on-kubernetes.md","articles":[]}]}]},"dir":"ltr"},"config":{"plugins":["github","codesnippet","splitter","page-toc-button","image-captions","page-footer-ex","editlink","-lunr","-search","search-plus"],"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"pluginsConfig":{"github":{"url":"https://github.com/rootsongjc/kubernetes-handbook"},"editlink":{"label":"编辑本页","multilingual":false,"base":"https://github.com/rootsongjc/kubernetes-handbook/blob/master/"},"page-footer-ex":{"copyright":"for GitBook","update_format":"YYYY-MM-DD HH:mm:ss","update_label":"update"},"splitter":{},"codesnippet":{},"fontsettings":{"theme":"white","family":"sans","size":2},"highlight":{},"page-toc-button":{},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false},"search-plus":{},"image-captions":{"variable_name":"_pictures"}},"page-footer-ex":{"copyright":"Jimmy Song","update_label":"最后更新：","update_format":"YYYY-MM-DD HH:mm:ss"},"theme":"default","author":"Jimmy Song","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"variables":{"_pictures":[{"backlink":"index.html#fig1.1.1","level":"1.1","list_caption":"Figure: wercker status","alt":"wercker status","nro":1,"url":"https://app.wercker.com/status/b8b69e593784e17ddcfd1286adfd8f3c/s/master","index":1,"caption_template":"Figure: _CAPTION_","label":"wercker status","attributes":{},"title":"wercker status","skip":false,"key":"1.1.1"},{"ba
2017-08-21 18:44:34 +08:00
});
< / script >
< / div >
< script src = "../gitbook/gitbook.js" > < / script >
< script src = "../gitbook/theme.js" > < / script >
< script src = "../gitbook/gitbook-plugin-github/plugin.js" > < / script >
< script src = "../gitbook/gitbook-plugin-splitter/splitter.js" > < / script >
< script src = "../gitbook/gitbook-plugin-page-toc-button/plugin.js" > < / script >
< script src = "../gitbook/gitbook-plugin-editlink/plugin.js" > < / script >
< script src = "../gitbook/gitbook-plugin-search-plus/jquery.mark.min.js" > < / script >
< script src = "../gitbook/gitbook-plugin-search-plus/search.js" > < / script >
< script src = "../gitbook/gitbook-plugin-sharing/buttons.js" > < / script >
< script src = "../gitbook/gitbook-plugin-fontsettings/fontsettings.js" > < / script >
< / body >
< / html >
