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1. 前言
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2. 概念原理
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2.1 设计理念
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2.2 Objects
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2.2.1 Pod
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2.2.1.1 Pod解析
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2.2.1.2 Init容器
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2.2.1.3 Pod安全策略
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2.2.1.4 Pod的生命周期
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2.2.2 Node
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2.2.3 Namespace
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2.2.4 Service
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2.2.5 Volume和Persistent Volume
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2.2.6 Deployment
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2.2.7 Secret
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2.2.8 StatefulSet
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2.2.9 DaemonSet
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2.2.10 ServiceAccount
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2.2.11 ReplicationController和ReplicaSet
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2.2.12 Job
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2.2.13 CronJob
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2.2.14 Ingress
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2.2.15 ConfigMap
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2.2.16 Horizontal Pod Autoscaling
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2.2.17 Label
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2.2.18 垃圾收集
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2.2.19 NetworkPolicy
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3. 用户指南
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3.1 资源对象配置
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3.1.1 配置Pod的liveness和readiness探针
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3.1.2 配置Pod的Service Account
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3.1.3 Secret配置
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3.2.3 管理namespace中的资源配额
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3.2 命令使用
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3.2.1 使用kubectl
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3.2.2 docker用户过度到kubectl命令行指南
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3.3 集群安全性管理
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3.3.1 管理集群中的TLS
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3.3.2 kubelet的认证授权
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3.3.3 TLS bootstrap
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3.3.4 kubectl的用户认证授权
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3.3.5 RBAC——基于角色的访问控制
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3.3.6 IP伪装代理
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3.4 访问 Kubernetes 集群
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3.4.1 访问集群
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3.4.2 使用 kubeconfig 文件配置跨集群认证
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3.4.3 通过端口转发访问集群中的应用程序
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3.4.4 使用 service 访问群集中的应用程序
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3.5 在kubernetes中开发部署应用
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3.5.1 适用于kubernetes的应用开发部署流程
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3.5.2 迁移传统应用到kubernetes中——以Hadoop YARN为例
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4. 最佳实践
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4.1 在CentOS上部署kubernetes1.6集群
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4.1.1 创建TLS证书和秘钥
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4.1.2 创建kubeconfig文件
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4.1.3 创建高可用etcd集群
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4.1.4 安装kubectl命令行工具
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4.1.5 部署master节点
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4.1.6 部署node节点
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4.1.7 安装kubedns插件
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4.1.8 安装dashboard插件
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4.1.9 安装heapster插件
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4.1.10 安装EFK插件
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4.2 服务发现与负载均衡
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4.2.1 安装Traefik ingress
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4.2.2 分布式负载测试
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4.2.3 网络和集群性能测试
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4.2.4 边缘节点配置
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4.3 运维管理
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4.3.1 服务滚动升级
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4.3.2 应用日志收集
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4.3.3 配置最佳实践
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4.3.4 集群及应用监控
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4.3.5 使用Jenkins进行持续构建与发布
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4.3.6 数据持久化问题
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4.3.7 管理容器的计算资源
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< / li >
< li class = "chapter " data-level = "1.4.3.8" data-path = "../practice/using-prometheus-to-monitor-kuberentes-cluster.html" >
< a href = "../practice/using-prometheus-to-monitor-kuberentes-cluster.html" >
4.3.8 使用Prometheus监控kubernetes集群
< / a >
2017-10-16 17:36:01 +08:00
< / li >
< li class = "chapter " data-level = "1.4.3.9" data-path = "../practice/using-heapster-to-get-object-metrics.html" >
< a href = "../practice/using-heapster-to-get-object-metrics.html" >
4.3.9 使用Heapster获取集群和对象的metric数据
< / a >
2017-10-18 16:53:12 +08:00
< / li >
< li class = "chapter " data-level = "1.4.3.10" data-path = "../practice/manually-upgrade.html" >
< a href = "../practice/manually-upgrade.html" >
4.3.10 手动集群升级
< / a >
2017-08-21 18:44:34 +08:00
< / 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 >
2017-09-01 21:04:51 +08:00
< / 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 >
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< / li >
< / ul >
< / li >
< / ul >
2017-10-19 15:31:08 +08:00
< / li >
< li class = "chapter " data-level = "1.4.5" data-path = "../practice/services-management-tool.html" >
< a href = "../practice/services-management-tool.html" >
4.5 服务编排管理
< / a >
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< / 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 " data-level = "1.5.1" data-path = "microservices.html" >
< a href = "microservices.html" >
5.1 微服务架构
< / a >
< ul class = "articles" >
2017-09-20 21:55:19 +08:00
< li class = "chapter " data-level = "1.5.1.1" data-path = "service-discovery-in-microservices.html" >
< a href = "service-discovery-in-microservices.html" >
5.1.1 微服务中的服务发现
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1.5.2" data-path = "service-mesh.html" >
< a href = "service-mesh.html" >
5.2 Service Mesh 服务网格
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.5.2.1" data-path = "istio.html" >
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< a href = "istio.html" >
5.1.1 Istio
< / a >
< ul class = "articles" >
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< li class = "chapter " data-level = "1.5.2.1.1" data-path = "istio-installation.html" >
2017-08-21 18:44:34 +08:00
< a href = "istio-installation.html" >
5.1.1.1 安装istio
< / a >
< / li >
2017-09-20 21:55:19 +08:00
< li class = "chapter active" data-level = "1.5.2.1.2" data-path = "configuring-request-routing.html" >
2017-08-21 18:44:34 +08:00
< a href = "configuring-request-routing.html" >
5.1.1.2 配置请求的路由规则
< / a >
< / li >
< / ul >
< / li >
2017-09-20 21:55:19 +08:00
< li class = "chapter " data-level = "1.5.2.2" data-path = "linkerd.html" >
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< a href = "linkerd.html" >
5.1.2 Linkerd
< / a >
< ul class = "articles" >
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< li class = "chapter " data-level = "1.5.2.2.1" data-path = "linkerd-user-guide.html" >
2017-08-21 18:44:34 +08:00
< a href = "linkerd-user-guide.html" >
5.1.2.1 Linkerd 使用指南
< / a >
< / li >
< / ul >
< / li >
< / ul >
< / li >
2017-09-20 21:55:19 +08:00
< li class = "chapter " data-level = "1.5.3" data-path = "big-data.html" >
2017-08-21 18:44:34 +08:00
< a href = "big-data.html" >
5.2 大数据
< / a >
< ul class = "articles" >
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< li class = "chapter " data-level = "1.5.3.1" data-path = "spark-standalone-on-kubernetes.html" >
2017-08-21 18:44:34 +08:00
2017-08-30 14:20:52 +08:00
< a href = "spark-standalone-on-kubernetes.html" >
2017-08-21 18:44:34 +08:00
2017-08-30 14:20:52 +08:00
5.2.1 Spark standalone on Kubernetes
2017-08-21 18:44:34 +08:00
< / a >
2017-08-31 14:23:44 +08:00
< / li >
2017-09-20 21:55:19 +08:00
< li class = "chapter " data-level = "1.5.3.2" data-path = "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 = "running-spark-with-kubernetes-native-scheduler.html" >
2017-08-31 14:23:44 +08:00
5.2.2 运行支持kubernetes原生调度的Spark程序
< / a >
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< / li >
< / ul >
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< / li >
2017-09-20 21:55:19 +08:00
< li class = "chapter " data-level = "1.5.4" data-path = "serverless.html" >
2017-08-30 16:52:33 +08:00
< a href = "serverless.html" >
5.3 Serverless架构
< / a >
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< / 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 >
2017-09-21 15:00:54 +08:00
< / li >
< li class = "chapter " data-level = "1.7.4" data-path = "../appendix/debug-kubernetes-services.html" >
< a href = "../appendix/debug-kubernetes-services.html" >
7.4 kubernetes service中的故障排查
< / a >
2017-10-18 14:16:55 +08:00
< / li >
< li class = "chapter " data-level = "1.7.5" data-path = "../appendix/material-share.html" >
< a href = "../appendix/material-share.html" >
2017-10-18 16:53:12 +08:00
7.5 Kubernetes相关资讯和情报链接
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< / a >
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< / li >
< / ul >
< / 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 18:44:34 +08:00
< / 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 = ".." > 5.1.1.2 配置请求的路由规则< / 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 = "配置请求的路由规则" > 配 置 请 求 的 路 由 规 则 < / h1 >
< p > 在 上 一 节 < a href = "istio-installation.html" > 安 装 istio< / a > 中 我 们 创 建 < a href = "https://istio.io/docs/samples/bookinfo.html" target = "_blank" > BookInfo< / a > 的 示 例 ， 熟 悉 了 Istio的 基 本 功 能 ， 现 在 我 们 再 来 看 一 下 istio的 高 级 特 性 — — 配 置 请 求 的 路 由 规 则 。 < / p >
< p > 使 用 istio我 们 可 以 根 据 < strong > 权 重 < / strong > 和 < strong > HTTP headers< / strong > 来 动 态 配 置 请 求 路 由 。 < / p >
< h2 id = "基于内容的路由" > 基 于 内 容 的 路 由 < / h2 >
< p > 因 为 BookInfo示 例 部 署 了 3个 版 本 的 评 论 微 服 务 ， 我 们 需 要 设 置 一 个 默 认 路 由 。 否 则 ， 当 你 多 次 访 问 应 用 程 序 时 ， 会 注 意 到 有 时 输 出 包 含 星 级 ， 有 时 候 又 没 有 。 这 是 因 为 没 有 明 确 的 默 认 版 本 集 ， Istio将 以 随 机 方 式 将 请 求 路 由 到 服 务 的 所 有 可 用 版 本 。 < / p >
< p > < strong > 注 意 < / strong > ： 假 定 您 尚 未 设 置 任 何 路 由 。 如 果 您 已 经 为 示 例 创 建 了 冲 突 的 路 由 规 则 ， 则 需 要 在 以 下 命 令 中 使 用 replace而 不 是 create。 < / p >
< p > 下 面 这 个 例 子 能 够 根 据 网 站 的 不 同 登 陆 用 户 ， 将 流 量 划 分 到 服 务 的 不 同 版 本 和 实 例 。 跟 kubernetes中 的 应 用 一 样 ， 所 有 的 路 由 规 则 都 是 通 过 声 明 式 的 yaml配 置 。 关 于 < code > reviews:v1< / code > 和 < code > reviews:v2< / code > 的 唯 一 区 别 是 ， v1没 有 调 用 评 分 服 务 ， productpage页 面 上 不 会 显 示 评 分 星 标 。 < / p >
< ol >
< li > < p > 将 微 服 务 的 默 认 版 本 设 置 成 v1。 < / p >
< pre > < code > istioctl create -f samples/apps/bookinfo/route-rule-all-v1.yaml
< / code > < / pre > < p > 使 用 以 下 命 令 查 看 定 义 的 路 由 规 则 。 < / p >
< pre > < code > istioctl get route-rules -o yaml
< / code > < / pre > < pre > < code class = "lang-Yaml" > < span class = "hljs-attr" > type:< / span > route-rule
< span class = "hljs-attr" > name:< / span > details-default
< span class = "hljs-attr" > namespace:< / span > default
< span class = "hljs-attr" > spec:< / span >
< span class = "hljs-attr" > destination:< / span > details.default.svc.cluster.local
< span class = "hljs-attr" > precedence:< / span > < span class = "hljs-number" > 1< / span >
< span class = "hljs-attr" > route:< / span >
< span class = "hljs-attr" > - tags:< / span >
< span class = "hljs-attr" > version:< / span > v1
< span class = "hljs-meta" > ---< / span >
< span class = "hljs-attr" > type:< / span > route-rule
< span class = "hljs-attr" > name:< / span > productpage-default
< span class = "hljs-attr" > namespace:< / span > default
< span class = "hljs-attr" > spec:< / span >
< span class = "hljs-attr" > destination:< / span > productpage.default.svc.cluster.local
< span class = "hljs-attr" > precedence:< / span > < span class = "hljs-number" > 1< / span >
< span class = "hljs-attr" > route:< / span >
< span class = "hljs-attr" > - tags:< / span >
< span class = "hljs-attr" > version:< / span > v1
< span class = "hljs-meta" > ---< / span >
< span class = "hljs-attr" > type:< / span > route-rule
< span class = "hljs-attr" > name:< / span > reviews-default
< span class = "hljs-attr" > namespace:< / span > default
< span class = "hljs-attr" > spec:< / span >
< span class = "hljs-attr" > destination:< / span > reviews.default.svc.cluster.local
< span class = "hljs-attr" > precedence:< / span > < span class = "hljs-number" > 1< / span >
< span class = "hljs-attr" > route:< / span >
< span class = "hljs-attr" > - tags:< / span >
< span class = "hljs-attr" > version:< / span > v1
< span class = "hljs-meta" > ---< / span >
< span class = "hljs-attr" > type:< / span > route-rule
< span class = "hljs-attr" > name:< / span > ratings-default
< span class = "hljs-attr" > namespace:< / span > default
< span class = "hljs-attr" > spec:< / span >
< span class = "hljs-attr" > destination:< / span > ratings.default.svc.cluster.local
< span class = "hljs-attr" > precedence:< / span > < span class = "hljs-number" > 1< / span >
< span class = "hljs-attr" > route:< / span >
< span class = "hljs-attr" > - tags:< / span >
< span class = "hljs-attr" > version:< / span > v1
< span class = "hljs-meta" > ---< / span >
< / code > < / pre >
< p > 由 于 对 代 理 的 规 则 传 播 是 异 步 的 ， 因 此 在 尝 试 访 问 应 用 程 序 之 前 ， 需 要 等 待 几 秒 钟 才 能 将 规 则 传 播 到 所 有 pod。 < / p >
< / li >
< li > < p > 在 浏 览 器 中 打 开 BookInfo URL（ < a href = "http://$GATEWAY_URL/productpage，我们在上一节中使用的是" target = "_blank" > http://$GATEWAY_URL/productpage， 我 们 在 上 一 节 中 使 用 的 是 < / a > < a href = "http://ingress.istio.io/productpage" target = "_blank" > http://ingress.istio.io/productpage< / a > ） 您 应 该 会 看 到 BookInfo应 用 程 序 的 产 品 页 面 显 示 。 注 意 ， 产 品 页 面 上 没 有 评 分 星 ， 因 为 < code > reviews:v1< / code > 不 访 问 评 级 服 务 。 < / p >
< / li >
< li > < p > 将 特 定 用 户 路 由 到 < code > reviews:v2< / code > 。 < / p >
< p > 为 测 试 用 户 jason启 用 评 分 服 务 ， 将 productpage的 流 量 路 由 到 < code > reviews:v2< / code > 实 例 上 。 < / p >
< pre > < code > istioctl create -f samples/apps/bookinfo/route-rule-reviews-test-v2.yaml
< / code > < / pre > < p > 确 认 规 则 生 效 ： < / p >
< pre > < code > istioctl get route-rule reviews-test-v2
< / code > < / pre > < pre > < code class = "lang-Yams" > destination: reviews.default.svc.cluster.local
match:
httpHeaders:
cookie:
regex: ^(.*?;)?(user=jason)(;.*)?$
precedence: 2
route:
- tags:
version: v2
< / code > < / pre >
< / li >
< li > < p > 使 用 jason用 户 登 陆 productpage页 面 。 < / p >
< p > 你 可 以 看 到 每 个 刷 新 页 面 时 ， 页 面 上 都 有 一 个 1到 5颗 星 的 评 级 。 如 果 你 使 用 其 他 用 户 登 陆 的 话 ， 将 因 继 续 使 用 < code > reviews:v1< / code > 而 看 不 到 星 标 评 分 。 < / p >
< / li >
< / ol >
< h2 id = "内部实现" > 内 部 实 现 < / h2 >
< p > 在 这 个 例 子 中 ， 一 开 始 使 用 istio将 100%的 流 量 发 送 到 BookInfo服 务 的 < code > reviews:v1< / code > 的 实 例 上 。 然 后 又 根 据 请 求 的 header（ 例 如 用 户 的 cookie） 将 流 量 选 择 性 的 发 送 到 < code > reviews:v2< / code > 实 例 上 。 < / p >
< p > 验 证 了 v2实 例 的 功 能 后 ， 就 可 以 将 全 部 用 户 的 流 量 发 送 到 v2实 例 上 ， 或 者 逐 步 的 迁 移 流 量 ， 如 10%、 20%直 到 100%。 < / p >
< p > 如 果 你 看 了 < a href = "https://istio.io/docs/tasks/fault-injection.html" target = "_blank" > 故 障 注 入 < / a > 这 一 节 ， 你 会 发 现 v2版 本 中 有 个 bug， 而 在 v3版 本 中 修 复 了 ， 你 想 将 流 量 迁 移 到 < code > reviews:v1< / code > 迁 移 到 < code > reviews:v3< / code > 版 本 上 ， 只 需 要 运 行 如 下 命 令 ： < / p >
< ol >
< li > < p > 将 50%的 流 量 从 < code > reviews:v1< / code > 转 移 到 < code > reviews:v3< / code > 上 。 < / p >
< pre > < code > istioctl replace -f samples/apps/bookinfo/route-rule-reviews-50-v3.yaml
< / code > < / pre > < p > 注 意 这 次 使 用 的 是 < code > replace< / code > 命 令 ， 而 不 是 < code > create< / code > ， 因 为 该 rule已 经 在 前 面 创 建 过 了 。 < / p >
< / li >
< li > < p > 登 出 jason用 户 ， 或 者 删 除 测 试 规 则 ， 可 以 看 到 新 的 规 则 已 经 生 效 。 < / p >
< p > 删 除 测 试 规 则 。 < / p >
< pre > < code > istioctl delete route-rule reviews-test-v2
istioctl delete route-rule ratings-test-delay
< / code > < / pre > < p > 现 在 的 规 则 就 是 刷 新 < code > productpage< / code > 页 面 ， 50%的 概 率 看 到 红 色 星 标 的 评 论 ， 50%的 概 率 看 不 到 星 标 。 < / p >
< p > 注 意 ： 因 为 使 用 Envoy sidecar的 实 现 ， 你 需 要 刷 新 页 面 很 多 次 才 能 看 到 接 近 规 则 配 置 的 概 率 分 布 ， 你 可 以 将 v3的 概 率 修 改 为 90%， 这 样 刷 新 页 面 时 ， 看 到 红 色 星 标 的 概 率 更 高 。 < / p >
< / li >
< li > < p > 当 v3版 本 的 微 服 务 稳 定 以 后 ， 就 可 以 将 100%的 流 量 分 摊 到 < code > reviews:v3< / code > 上 了 。 < / p >
< pre > < code > istioctl replace -f samples/apps/bookinfo/route-rule-reviews-v3.yaml
< / code > < / pre > < p > 现 在 不 论 你 使 用 什 么 用 户 登 陆 < code > productpage< / code > 页 面 ， 你 都 可 以 看 到 带 红 色 星 标 评 分 的 评 论 了 。 < / p >
< / li >
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