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![]() 资料简介: 本书作者一直在Google和其他公司从事Kubernetes方面的工作,为我们解释了该系统如何融入分布式应用程序的生命周期之中的。你将学习如何使用各种工具和API来实现可扩展分布式系统管理的自动化,无论该系统用于在线服务、机器学习应用程序,还是Raspberry Pi计算机群集。本书的主要内容有:探索Kubernetes所面临的分布式系统挑战。使用Docker等容器进行容器化应用开发。使用docker镜像格式和容器运行时在Kubernetes上创建和运行容器。探索在生产中运行应用程序所必需的专门对象。在无需停机或无差错情况下可靠地推出新的软件版本。举例说明如何在Kubernetes中开发和部署真实应用程序 资料目录: 前言 .........................................................................................................................................1 第1章 概述 ...............................................................................................................................7 速度 ...........................................................................................................................................8 不变性的价值 ..................................................................................................................9 声明式配置 .....................................................................................................................10 自我修复系统 .................................................................................................................11 扩展服务和团队 .....................................................................................................................12 解耦 ..................................................................................................................................12 更易于扩展的应用程序和集群 ..................................................................................12 利用微服务扩展开发团队 ...........................................................................................13 一致性和可扩展性的隔离 ...........................................................................................14 抽象基础设施 ..........................................................................................................................16 效率 ..........................................................................................................................................17 小结 ..........................................................................................................................................18 第2章 创建和运行容器 ......................................................19 容器镜像 ..................................................................................................................................20 Docker镜像格式 ............................................................................................................21 使用Docker构建应用程序镜像...........................................................................................23 Dockerfile........................................................................................................................23 镜像的安全性 .................................................................................................................24 优化镜像大小 .................................................................................................................24 将镜像存储到远程仓储 ........................................................................................................25 Docker容器运行时 .................................................................................................................26 通过Docker运行容器 ....................................................................................................27 探索kuard应用程序 ......................................................................................................27 限制资源使用 .................................................................................................................27 删除镜像 ..................................................................................................................................28 小结 ..........................................................................................................................................29 第3章 部署Kubernetes群集 .............................................30 在公共云上安装Kubernetes...............................................................................................31 GoogleContainer Service ...........................................................................................31 使用AzureContainer Service安装Kubernetes......................................................31 在Amazon WebServices上安装Kubernetes...........................................................32 使用minikube在本地安装Kubernetes.............................................................................33 在Raspberry Pi上运行Kubernetes....................................................................................34 Kubernetes客户端 .................................................................................................................34 检查群集状态 .................................................................................................................34 查看KubernetesWorker节点 ......................................................................................35 群集组件 ..................................................................................................................................38 Kubernetes代理 .............................................................................................................38 KubernetesDNS.............................................................................................................38 KubernetesUI .................................................................................................................39 小结 .........................................................................................................................................40 第4章 常用kubectl命令 ....................................................41 命名空间 ..................................................................................................................................41 上下文 ......................................................................................................................................41 查看KubernetesAPI对象.....................................................................................................42 创建、更新和销毁Kubernetes对象...................................................................................43 标记和注释对象 ....................................................................................................................44 调试命令 ..................................................................................................................................44 小结 ..........................................................................................................................................45 第5章 pod ........................................................................46 Kubernetes中的pod..............................................................................................................47 用pod思考 ...............................................................................................................................48 podManifest...........................................................................................................................48 创建pod...........................................................................................................................49 创建podManifest..........................................................................................................50 运行pod...................................................................................................................................51 列出pod ...........................................................................................................................51 pod的详细信息 .............................................................................................................52 删除pod ...........................................................................................................................53 访问pod..................................................................................................................................54 使用端口转发 .................................................................................................................54 使用日志获取更多信息 ...............................................................................................55 利用exec执行容器中的命令.......................................................................................55 在容器间复制文件 ........................................................................................................56 健康检查 ..................................................................................................................................56 活性探针 .........................................................................................................................57 就绪探针 ..........................................................................................................................58 健康检查的类型 .............................................................................................................59 资源管理 ..................................................................................................................................59 资源请求:所需资源下限 ...........................................................................................60 通过限额控制资源用量 ...............................................................................................62 利用卷实现数据持久化 ........................................................................................................63 通过pod使用存储卷 .....................................................................................................63 pod使用卷的不同方式.................................................................................................64 使用远程磁盘实现数据的持久性 ..............................................................................65 综合讨论 ..................................................................................................................................66 小结 ..........................................................................................................................................67 第6章 标签和注释 ............................................................68 标签 ..........................................................................................................................................68 应用标签 ..........................................................................................................................70 修改标签 .........................................................................................................................71 标签选择器 .....................................................................................................................72 API对象中的标签选择器..............................................................................................74 注释 ..........................................................................................................................................75 定义注释 ..........................................................................................................................76 清理 ..........................................................................................................................................76 小结 ..........................................................................................................................................77 第7章 服务发现 ...............................................................78 什么是服务发现? .................................................................................................................78 Service对象 .............................................................................................................................79 提供DNS服务 ..................................................................................................................80 就绪检查 ..........................................................................................................................82 集群之外 ..................................................................................................................................83 云集成 ......................................................................................................................................85 高级细节 .................................................................................................................................86 端点 ..................................................................................................................................86 手动服务发现 .................................................................................................................88 kube-proxy与集群IP.....................................................................................................89 群集IP环境变量..............................................................................................................90 清除对象 ..................................................................................................................................91 小结 ..........................................................................................................................................91 第8章 ReplicaSet.............................................................92 调和循环 ..................................................................................................................................93 将pod和ReplicaSet关联起来 ..............................................................................................94 采用现有容器 .................................................................................................................94 隔离容器 ..........................................................................................................................94 使用ReplicaSet进行设计 ......................................................................................................95 ReplicaSet的规范 ...................................................................................................................95 pod模板 ..........................................................................................................................96 标签 ..................................................................................................................................96 创建ReplicaSet........................................................................................................................97 监查ReplicaSet........................................................................................................................97 从pod中查找ReplicaSet...............................................................................................98 查找ReplicaSet的pod集...............................................................................................98 扩展ReplicaSet........................................................................................................................99 使用kubectlScale进行命令式缩放 ...........................................................................99 使用kubectlapply进行声明式缩放 .......................................................................100 自动调整ReplicaSet...................................................................................................101 删除ReplicaSet.....................................................................................................................102 小结 .......................................................................................................................................103 第9章 DaemonSet ..........................................................104 DaemonSet调度器 .............................................................................................................105 创建DaemonSet..................................................................................................................105 将DaemonSet限制为特定节点 ........................................................................................108 为节点添加标签 ..........................................................................................................108 节点选择器 ..................................................................................................................109 更新DaemonSet..................................................................................................................110 通过删除单个pod来更新DaemonSet................................................................... 110 滚动更新DaemonSet.................................................................................................111 删除DaemonSet..................................................................................................................112 小结 .......................................................................................................................................112 第10章 作业 ...................................................................113 Job对象 .................................................................................................................................113 作业模式 ...............................................................................................................................114 一次性作业 ..................................................................................................................114 并行性 ...........................................................................................................................120 工作队列 .......................................................................................................................122 小结 .......................................................................................................................................126 第11章 ConfigMap与Secret........................................... 127 ConfigMap............................................................................................................................127 创建ConfigMap...........................................................................................................128 ConfigMap的用法 ......................................................................................................129 Secret....................................................................................................................................132 创建Secret....................................................................................................................133 消费secret ....................................................................................................................134 私有Docker仓库 .........................................................................................................136 命名约束 ...............................................................................................................................137 管理ConfigMap和Secret...................................................................................................137 显示 ...............................................................................................................................138 创建 ...............................................................................................................................138 更新 ...............................................................................................................................139 小结 .......................................................................................................................................141 第12章 Deployment .......................................................142 我们的第一个Deployment对象 ......................................................................................143 Deployment对象的运行机制 ..................................................................................143 创建Deployment对象 ........................................................................................................145 管理Deployment对象 ........................................................................................................146 更新Deployment对象 ........................................................................................................147 Deployment对象的缩放 ...........................................................................................148 更新容器镜像 ..............................................................................................................148 更新的历史记录 ..........................................................................................................150 部署策略 ...............................................................................................................................153 Recreate策略 ...............................................................................................................153 RollingUpdate策略.....................................................................................................153 降低更新速度以确保服务的健康 ...........................................................................157 删除Deployment.................................................................................................................159 小结 .......................................................................................................................................159 第13章 为Kubernetes集成存储解决方案 .........................160 导入外部服务 .......................................................................................................................161 没有选择器的服务 ....................................................................................................163 外部服务的局限性:健康检查 ...............................................................................165 运行可靠的单例 ..................................................................................................................165 运行MySQL单例 ..........................................................................................................165 动态卷配置 ..................................................................................................................169 带有StatefulSet的Kubernetes-Native存储 ..................................................................170 StatefulSet的特性 .......................................................................................................171 使用StatefulSet手动部署备份式MongoDB .........................................................171 自动创建MongoDB群集 ...........................................................................................174 持久卷和有状态集 .....................................................................................................177 最后一件事:准备就绪探针 ....................................................................................178 小结 .......................................................................................................................................179 第14章 部署实际应用程序............................................... 180 Parse ......................................................................................................................................180 先决条件 .......................................................................................................................181 构建parse-server........................................................................................................181 部署parse-server........................................................................................................182 测试Parse......................................................................................................................183 Ghost.....................................................................................................................................183 配置Ghost.....................................................................................................................183 Redis......................................................................................................................................187 配置Redis......................................................................................................................188 创建Redis服务 .............................................................................................................190 部署Redis......................................................................................................................190 测试Redis群集 .............................................................................................................192 小结 .......................................................................................................................................193 附录A 利用Raspberry Pi搭建Kubernetes群集 ......................................................................195 |