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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
< / a >
2017-09-25 21:41:08 +08:00
< / 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 >
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< / 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 >
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< / 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 >
< / 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" >
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< 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" >
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< a href = "istio-installation.html" >
5.1.1.1 安装istio
< / a >
< / li >
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< li class = "chapter " data-level = "1.5.2.1.2" data-path = "configuring-request-routing.html" >
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< a href = "configuring-request-routing.html" >
5.1.1.2 配置请求的路由规则
< / a >
< / li >
< / ul >
< / li >
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< 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 active" data-level = "1.5.2.2.1" data-path = "linkerd-user-guide.html" >
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< a href = "linkerd-user-guide.html" >
5.1.2.1 Linkerd 使用指南
< / a >
< / li >
< / ul >
< / li >
< / ul >
< / li >
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< li class = "chapter " data-level = "1.5.3" data-path = "big-data.html" >
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< 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" >
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2017-08-30 14:20:52 +08:00
< a href = "spark-standalone-on-kubernetes.html" >
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2017-08-30 14:20:52 +08:00
5.2.1 Spark standalone on Kubernetes
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< / a >
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< / li >
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< 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 >
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< 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 >
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< / 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" >
7.5 相关资料分享
< / 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 = ".." > 5.1.2.1 Linkerd 使用指南< / 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 = "linkerd-使用指南" > Linkerd 使 用 指 南 < / h1 >
< h2 id = "前言" > 前 言 < / h2 >
< p > Linkerd 作 为 一 款 service mesh 与 kubernetes 结 合 后 主 要 有 以 下 几 种 用 法 ： < / p >
< ol >
< li > 作 为 服 务 网 关 ， 可 以 监 控 kubernetes 中 的 服 务 和 实 例 < / li >
< li > 使 用 TLS 加 密 服 务 < / li >
< li > 通 过 流 量 转 移 到 持 续 交 付 < / li >
< li > 开 发 测 试 环 境 （ Eat your own dog food） 、 Ingress 和 边 缘 路 由 < / li >
< li > 给 微 服 务 做 staging< / li >
< li > 分 布 式 tracing< / li >
< li > 作 为 Ingress controller< / li >
< li > 使 用 gRPC 更 方 便 < / li >
< / ol >
< p > 以 下 我 们 着 重 讲 解 在 kubernetes 中 如 何 使 用 linkerd 作 为 kubernetes 的 Ingress controller， 并 作 为 边 缘 节 点 代 替 < a href = "https://traefik.io" target = "_blank" > Traefik< / a > 的 功 能 ， 详 见 < a href = "../practice/edge-node-configuration.html" > 边 缘 节 点 的 配 置 < / a > 。 < / p >
< h2 id = "准备" > 准 备 < / h2 >
< p > 安 装 测 试 时 需 要 用 到 的 镜 像 有 ： < / p >
< pre > < code > buoyantio/helloworld:0.1.4
buoyantio/jenkins-plus:2.60.1
buoyantio/kubectl:v1.4.0
buoyantio/linkerd:1.1.2
buoyantio/namerd:1.1.2
buoyantio/nginx:1.10.2
linkerd/namerctl:0.8.6
openzipkin/zipkin:1.20
tutum/dnsutils:latest
< / code > < / pre > < p > 这 些 镜 像 可 以 直 接 通 过 Docker Hub 获 取 ， 我 将 它 们 下 载 下 来 并 上 传 到 了 自 己 的 私 有 镜 像 仓 库 < code > sz-pg-oam-docker-hub-001.tendcloud.com< / code > 中 ， 下 文 中 用 到 的 镜 像 皆 来 自 我 的 私 有 镜 像 仓 库 ， yaml 配 置 见 < a href = "../manifests/linkerd" > linkerd< / a > 目 录 ， 并 在 使 用 时 将 配 置 中 的 镜 像 地 址 修 改 为 你 自 己 的 。 < / p >
< h2 id = "部署" > 部 署 < / h2 >
< p > 首 先 需 要 先 创 建 RBAC， 因 为 使 用 namerd 和 ingress 时 需 要 用 到 。 < / p >
< pre > < code class = "lang-bash" > $ kubectl create < span class = "hljs-_" > -f< / span > linkerd-rbac-beta.yml
< / code > < / pre >
< p > Linkerd 提 供 了 Jenkins 示 例 ， 在 部 署 的 时 候 使 用 以 下 命 令 ： < / p >
< pre > < code class = "lang-bash" > $ kubectl create < span class = "hljs-_" > -f< / span > jenkins-rbac-beta.yml
$ kubectl create < span class = "hljs-_" > -f< / span > jenkins.yml
< / code > < / pre >
< p > 访 问 < a href = "http://jenkins.jimmysong.io" target = "_blank" > http://jenkins.jimmysong.io< / a > < / p >
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< figure id = "fig1.5.2.2.1.1" > < img src = "../images/linkerd-jenkins-pipeline.jpg" alt = "Jenkins pipeline" > < figcaption > 图 片 - Jenkins pipeline< / figcaption > < / figure >
< figure id = "fig1.5.2.2.1.2" > < img src = "../images/linkerd-jenkins.jpg" alt = "Jenkins config" > < figcaption > 图 片 - Jenkins config< / figcaption > < / figure >
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< p > < strong > 注 意 < / strong > ： 要 访 问 Jenkins 需 要 在 Ingress 中 增 加 配 置 ， 下 文 会 提 到 。 < / p >
< p > 在 kubernetes 中 使 用 Jenkins 的 时 候 需 要 注 意 Pipeline 中 的 配 置 ： < / p >
< pre > < code > def currentVersion = getCurrentVersion()
def newVersion = getNextVersion(currentVersion)
def frontendIp = kubectl(" get svc l5d -o jsonpath=\" {.status.loadBalancer.ingress[0].*}\" " ).trim()
def originalDst = getDst(getDtab())
< / code > < / pre > < p > < code > frontendIP< / code > 的 地 址 要 配 置 成 service 的 Cluster IP ， 因 为 我 们 没 有 用 到 LoadBalancer。 < / p >
< p > 需 要 安 装 namerd， namerd 负 责 dtab 信 息 的 存 储 ， 当 然 也 可 以 存 储 在 etcd、 consul中 。 dtab 保 存 的 是 路 由 规 则 信 息 ， 支 持 递 归 解 析 ， 详 见 < a href = "https://linkerd.io/in-depth/dtabs/" target = "_blank" > dtab< / a > 。 < / p >
< p > 流 量 切 换 主 要 是 通 过 < a href = "https://linkerd.io/in-depth/dtabs/" target = "_blank" > dtab< / a > 来 实 现 的 ， 通 过 在 HTTP 请 求 的 header 中 增 加 < code > l5d-dtab< / code > 和 < code > Host< / code > 信 息 可 以 对 流 量 分 离 到 kubernetes 中 的 不 同 service 上 。 < / p >
< p > < strong > 遇 到 的 问 题 < / strong > < / p >
< p > Failed with the following error(s)
Error signal dtab is already marked as being deployed!< / p >
< p > 因 为 该 dtab entry 已 经 存 在 ， 需 要 删 除 后 再 运 行 。 < / p >
< p > 访 问 < a href = "http://namerd.jimmysong.io" target = "_blank" > http://namerd.jimmysong.io< / a > < / p >
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< figure id = "fig1.5.2.2.1.3" > < img src = "../images/namerd-internal.jpg" alt = "namerd" > < figcaption > 图 片 - namerd< / figcaption > < / figure >
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< p > dtab 保 存 在 namerd 中 ， 该 页 面 中 的 更 改 不 会 生 效 ， 需 要 使 用 命 令 行 来 操 作 。 < / p >
< p > 使 用 < a href = "https://github.com/linkerd/namerctl" target = "_blank" > namerctl< / a > 来 操 作 。 < / p >
< pre > < code class = "lang-bash" > $ namerctl --base-url http://namerd-backend.jimmysong.io dtab update internal file
< / code > < / pre >
< p > < strong > 注 意 < / strong > ： update 时 需 要 将 更 新 文 本 先 写 入 文 件 中 。 < / p >
< h2 id = "部署-linkerd" > 部 署 Linkerd< / h2 >
< p > 直 接 使 用 yaml 文 件 部 署 ， 注 意 修 改 镜 像 仓 库 地 址 。 < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # 创 建 namerd< / span >
$ kubectl create < span class = "hljs-_" > -f< / span > namerd.yaml
< span class = "hljs-comment" > # 创 建 ingress< / span >
$ kubectl create < span class = "hljs-_" > -f< / span > linkerd-ingress.yml
< span class = "hljs-comment" > # 创 建 测 试 服 务 hello-world< / span >
$ kubectl create < span class = "hljs-_" > -f< / span > hello-world.yml
< span class = "hljs-comment" > # 创 建 API 服 务 < / span >
$ kubectl create < span class = "hljs-_" > -f< / span > api.yml
< span class = "hljs-comment" > # 创 建 测 试 服 务 world-v2< / span >
$ kubectl create < span class = "hljs-_" > -f< / span > world-v2.yml
< / code > < / pre >
< p > 为 了 在 本 地 调 试 linkerd， 我 们 将 linkerd 的 service 加 入 到 ingress 中 ， 详 见 < a href = "practice/edge-node-configuration.md" > 边 缘 节 点 配 置 < / a > 。 < / p >
< p > 在 Ingress 中 增 加 如 下 内 容 ： < / p >
< pre > < code class = "lang-yaml" > < span class = "hljs-attr" > - host:< / span > linkerd.jimmysong.io
< span class = "hljs-attr" > http:< / span >
< span class = "hljs-attr" > paths:< / span >
< span class = "hljs-attr" > - path:< / span > /
< span class = "hljs-attr" > backend:< / span >
< span class = "hljs-attr" > serviceName:< / span > l5d
< span class = "hljs-attr" > servicePort:< / span > < span class = "hljs-number" > 9990< / span >
< span class = "hljs-attr" > - host:< / span > linkerd-viz.jimmysong.io
< span class = "hljs-attr" > http:< / span >
< span class = "hljs-attr" > paths:< / span >
< span class = "hljs-attr" > - path:< / span > /
< span class = "hljs-attr" > backend:< / span >
< span class = "hljs-attr" > serviceName:< / span > linkerd-viz
< span class = "hljs-attr" > servicePort:< / span > < span class = "hljs-number" > 80< / span >
< span class = "hljs-attr" > - host:< / span > l5d.jimmysong.io
< span class = "hljs-attr" > http:< / span >
< span class = "hljs-attr" > paths:< / span >
< span class = "hljs-attr" > - path:< / span > /
< span class = "hljs-attr" > backend:< / span >
< span class = "hljs-attr" > serviceName:< / span > l5d
< span class = "hljs-attr" > servicePort:< / span > < span class = "hljs-number" > 4141< / span >
< span class = "hljs-attr" > - host:< / span > jenkins.jimmysong.io
< span class = "hljs-attr" > http:< / span >
< span class = "hljs-attr" > paths:< / span >
< span class = "hljs-attr" > - path:< / span > /
< span class = "hljs-attr" > backend:< / span >
< span class = "hljs-attr" > serviceName:< / span > jenkins
< span class = "hljs-attr" > servicePort:< / span > < span class = "hljs-number" > 80< / span >
< / code > < / pre >
< p > 在 本 地 < code > /etc/hosts< / code > 中 添 加 如 下 内 容 ： < / p >
< pre > < code class = "lang-i" > 172.20.0.119 linkerd.jimmysong.io
172.20.0.119 linkerd-viz.jimmysong.io
172.20.0.119 l5d.jimmysong.io
< / code > < / pre >
< p > < strong > 测 试 路 由 功 能 < / strong > < / p >
< p > 使 用 curl 简 单 测 试 。 < / p >
< p > 单 条 测 试 < / p >
< pre > < code class = "lang-bash" > $ curl < span class = "hljs-_" > -s< / span > -H < span class = "hljs-string" > " Host: www.hello.world" < / span > 172.20.0.120:4141
Hello (172.30.60.14) world (172.30.71.19)!!%
< / code > < / pre >
< p > 请 注 意 请 求 返 回 的 结 果 ， 表 示 访 问 的 是 < code > world-v1< / code > service。 < / p >
< pre > < code class = "lang-bash" > $ < span class = "hljs-keyword" > for< / span > i < span class = "hljs-keyword" > in< / span > $(seq 0 10000);< span class = "hljs-keyword" > do< / span > < span class = "hljs-built_in" > echo< / span > < span class = "hljs-variable" > $i< / span > ;curl < span class = "hljs-_" > -s< / span > -H < span class = "hljs-string" > " Host: www.hello.world" < / span > 172.20.0.120:4141;< span class = "hljs-keyword" > done< / span >
< / code > < / pre >
< p > 使 用 ab test。 < / p >
< pre > < code class = "lang-bash" > $ ab -c 4 -n 10000 -H < span class = "hljs-string" > " Host: www.hello.world" < / span > http://172.20.0.120:4141/
This is ApacheBench, Version 2.3 < < span class = "hljs-variable" > $Revision< / span > : 1757674 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 172.20.0.120 (be patient)
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Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests
Server Software:
Server Hostname: 172.20.0.120
Server Port: 4141
Document Path: /
Document Length: 43 bytes
Concurrency Level: 4
Time taken < span class = "hljs-keyword" > for< / span > tests: 262.505 seconds
Complete requests: 10000
Failed requests: 0
Total transferred: 2210000 bytes
HTML transferred: 430000 bytes
Requests per second: 38.09 [< span class = "hljs-comment" > #/sec] (mean)< / span >
Time per request: 105.002 [ms] (mean)
Time per request: 26.250 [ms] (mean, across all concurrent requests)
Transfer rate: 8.22 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 36 51 91.1 39 2122
Processing: 39 54 29.3 46 585
Waiting: 39 52 20.3 46 362
Total: 76 105 96.3 88 2216
Percentage of the requests served within a certain time (ms)
50% 88
66% 93
75% 99
80% 103
90% 119
95% 146
98% 253
99% 397
100% 2216 (longest request)
< / code > < / pre >
< h2 id = "监控-kubernets-中的服务与实例" > 监 控 kubernets 中 的 服 务 与 实 例 < / h2 >
< p > 访 问 < a href = "http://linkerd.jimmysong.io" target = "_blank" > http://linkerd.jimmysong.io< / a > 查 看 流 量 情 况 < / p >
< p > Outcoming < / p >
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< figure id = "fig1.5.2.2.1.4" > < img src = "../images/linkerd-helloworld-outgoing.jpg" alt = "linkerd监控" > < figcaption > 图 片 - linkerd监 控 < / figcaption > < / figure >
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< p > Incoming< / p >
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< figure id = "fig1.5.2.2.1.5" > < img src = "../images/linkerd-helloworld-incoming.jpg" alt = "linkerd监控" > < figcaption > 图 片 - linkerd监 控 < / figcaption > < / figure >
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< p > 访 问 < a href = "http://linkerd-viz.jimmysong.io" target = "_blank" > http://linkerd-viz.jimmysong.io< / a > 查 看 应 用 metric 监 控 < / p >
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< figure id = "fig1.5.2.2.1.6" > < img src = "../images/linkerd-grafana.png" alt = "linkerd性能监控" > < figcaption > 图 片 - linkerd性 能 监 控 < / figcaption > < / figure >
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< h2 id = "测试路由" > 测 试 路 由 < / h2 >
< p > 测 试 在 http header 中 增 加 dtab 规 则 。 < / p >
< pre > < code class = "lang-bash" > $ curl -H < span class = "hljs-string" > " Host: www.hello.world" < / span > -H < span class = "hljs-string" > " l5d-dtab:/host/world => /srv/world-v2;" < / span > 172.20.0.120:4141
Hello (172.30.60.14) earth (172.30.94.40)!!
< / code > < / pre >
< p > 请 注 意 调 用 返 回 的 结 果 ， 表 示 调 用 的 是 < code > world-v2< / code > 的 service。 < / p >
< p > 另 外 再 对 比 ab test 的 结 果 与 < code > linkerd-viz< / code > 页 面 上 的 结 果 ， 可 以 看 到 结 果 一 致 。 < / p >
< p > 但 是 我 们 可 能 不 想 把 该 功 能 暴 露 给 所 有 人 ， 所 以 可 以 在 前 端 部 署 一 个 nginx 来 过 滤 header 中 的 < code > l5d-dtab< / code > 打 头 的 字 段 ， 并 通 过 设 置 cookie 的 方 式 来 替 代 header 里 的 < code > l5d-dtab< / code > 字 段 。 < / p >
< pre > < code class = "lang-bash" > $ http_proxy=http://172.20.0.120:4141 curl < span class = "hljs-_" > -s< / span > http:/hello
Hello (172.30.60.14) world (172.30.71.19)!!
< / code > < / pre >
< h2 id = "将-linkerd-作为-ingress-controller" > 将 Linkerd 作 为 Ingress controller< / h2 >
< p > 将 Linkerd 作 为 kubernetes ingress controller 的 方 式 跟 将 Treafik 作 为 ingress controller 的 过 程 过 程 完 全 一 样 ， 可 以 直 接 参 考 < a href = "../practice/edge-node-configuration.html" > 边 缘 节 点 配 置 < / a > 。 < / p >
< p > 架 构 如 下 图 所 示 。 < / p >
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< figure id = "fig1.5.2.2.1.7" > < img src = "../images/linkerd-ingress-controller.jpg" alt = "Linkerd ingress controller" > < figcaption > 图 片 - Linkerd ingress controller< / figcaption > < / figure >
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< p > < em > (图 片 来 自 A Service Mesh for Kubernetes - Buoyant.io)< / em > < / p >
< p > 当 然 可 以 绕 过 kubernetes ingress controller 直 接 使 用 linkerd 作 为 边 界 路 由 ， 通 过 dtab 和 linkerd 前 面 的 nginx 来 路 由 流 量 。 < / p >
< h2 id = "参考" > 参 考 < / h2 >
< p > < a href = "https://github.com/linkerd/linkerd-examples/" target = "_blank" > https://github.com/linkerd/linkerd-examples/< / a > < / p >
< p > < a href = "https://cdn2.hubspot.net/hubfs/2818724/A%20Service%20Mesh%20for%20Kubernetes_Final.pdf" target = "_blank" > A Service Mesh for Kubernetes< / a > < / p >
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< p > < a href = "https://linkerd.io/in-depth/dtabs/" target = "_blank" > dtab< / a > < / p >
< footer class = "page-footer" > < span class = "copyright" > Copyright © jimmysong.io 2017 all right reserved， powered by Gitbook< / span > < span class = "footer-modification" > Updated:
2017-08-21 18:23:35
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