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2.2 Objects
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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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2.2.18 垃圾收集
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2.2.19 NetworkPolicy
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3.1 资源对象配置
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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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3.3 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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3.4.4 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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4.3.8 使用Prometheus监控kubernetes集群
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4.3.9 使用Heapster获取集群和对象的metric数据
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4.4 存储管理
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4.4.1 GlusterFS
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4.4.1.1 使用GlusterFS做持久化存储
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4.4.1.2 在OpenShift中使用GlusterFS做持久化存储
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4.4.2 CephFS
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4.4.2.1 使用Ceph做持久化存储
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5. 领域应用
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5.1 微服务架构
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<ul class="articles">
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.1.1" data-path="../usecases/service-discovery-in-microservices.html">
<a href="../usecases/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="../usecases/service-mesh.html">
<a href="../usecases/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="../usecases/istio.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/istio.html">
5.1.1 Istio
</a>
<ul class="articles">
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.2.1.1" data-path="../usecases/istio-installation.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/istio-installation.html">
5.1.1.1 安装istio
</a>
</li>
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.2.1.2" data-path="../usecases/configuring-request-routing.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/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="../usecases/linkerd.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/linkerd.html">
5.1.2 Linkerd
</a>
<ul class="articles">
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.2.2.1" data-path="../usecases/linkerd-user-guide.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/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="../usecases/big-data.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/big-data.html">
5.2 大数据
</a>
<ul class="articles">
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.3.1" data-path="../usecases/spark-standalone-on-kubernetes.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/spark-standalone-on-kubernetes.html">
5.2.1 Spark standalone on Kubernetes
</a>
</li>
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.3.2" data-path="../usecases/running-spark-with-kubernetes-native-scheduler.html">
2017-08-31 23:28:33 +08:00
2017-09-14 15:57:50 +08:00
<a href="../usecases/running-spark-with-kubernetes-native-scheduler.html">
2017-08-31 23:28:33 +08:00
5.2.2 运行支持kubernetes原生调度的Spark程序
</a>
</li>
</ul>
</li>
2017-09-20 21:55:19 +08:00
<li class="chapter " data-level="1.5.4" data-path="../usecases/serverless.html">
2017-08-31 23:28:33 +08:00
<a href="../usecases/serverless.html">
5.3 Serverless架构
</a>
</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>
<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>
2017-08-31 23:28:33 +08:00
</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
2017-08-31 23:28:33 +08:00
</a>
</li>
</ul>
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<h1>
<i class="fa fa-circle-o-notch fa-spin"></i>
<a href=".." >2.2.1.2 Init容器</a>
</h1>
</div>
<div class="page-wrapper" tabindex="-1" role="main">
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<section class="normal markdown-section">
<h1 id="init-&#x5BB9;&#x5668;">Init &#x5BB9;&#x5668;</h1>
<p>&#x8BE5;&#x7279;&#x6027;&#x5728; 1.6 &#x7248;&#x672C;&#x5DF2;&#x7ECF;&#x9000;&#x51FA; beta &#x7248;&#x672C;&#x3002;Init &#x5BB9;&#x5668;&#x53EF;&#x4EE5;&#x5728; PodSpec &#x4E2D;&#x540C;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x7684; <code>containers</code> &#x6570;&#x7EC4;&#x4E00;&#x8D77;&#x6765;&#x6307;&#x5B9A;&#x3002; beta &#x6CE8;&#x89E3;&#x7684;&#x503C;&#x5C06;&#x4ECD;&#x9700;&#x4FDD;&#x7559;&#xFF0C;&#x5E76;&#x8986;&#x76D6; PodSpec &#x5B57;&#x6BB5;&#x503C;&#x3002;</p>
<p>&#x672C;&#x6587;&#x8BB2;&#x89E3; Init &#x5BB9;&#x5668;&#x7684;&#x57FA;&#x672C;&#x6982;&#x5FF5;&#xFF0C;&#x5B83;&#x662F;&#x4E00;&#x79CD;&#x4E13;&#x7528;&#x7684;&#x5BB9;&#x5668;&#xFF0C;&#x5728;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x542F;&#x52A8;&#x4E4B;&#x524D;&#x8FD0;&#x884C;&#xFF0C;&#x5E76;&#x5305;&#x62EC;&#x4E00;&#x4E9B;&#x5E94;&#x7528;&#x955C;&#x50CF;&#x4E2D;&#x4E0D;&#x5B58;&#x5728;&#x7684;&#x5B9E;&#x7528;&#x5DE5;&#x5177;&#x548C;&#x5B89;&#x88C5;&#x811A;&#x672C;&#x3002;</p>
<h2 id="&#x7406;&#x89E3;-init-&#x5BB9;&#x5668;">&#x7406;&#x89E3; Init &#x5BB9;&#x5668;</h2>
<p><a href="https://kubernetes.io/docs/concepts/abstractions/pod/" target="_blank">Pod</a> &#x80FD;&#x591F;&#x5177;&#x6709;&#x591A;&#x4E2A;&#x5BB9;&#x5668;&#xFF0C;&#x5E94;&#x7528;&#x8FD0;&#x884C;&#x5728;&#x5BB9;&#x5668;&#x91CC;&#x9762;&#xFF0C;&#x4F46;&#x662F;&#x5B83;&#x4E5F;&#x53EF;&#x80FD;&#x6709;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A;&#x5148;&#x4E8E;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x542F;&#x52A8;&#x7684; Init &#x5BB9;&#x5668;&#x3002;</p>
<p>Init &#x5BB9;&#x5668;&#x4E0E;&#x666E;&#x901A;&#x7684;&#x5BB9;&#x5668;&#x975E;&#x5E38;&#x50CF;&#xFF0C;&#x9664;&#x4E86;&#x5982;&#x4E0B;&#x4E24;&#x70B9;&#xFF1A;</p>
<ul>
<li>Init &#x5BB9;&#x5668;&#x603B;&#x662F;&#x8FD0;&#x884C;&#x5230;&#x6210;&#x529F;&#x5B8C;&#x6210;&#x4E3A;&#x6B62;&#x3002;</li>
<li>&#x6BCF;&#x4E2A; Init &#x5BB9;&#x5668;&#x90FD;&#x5FC5;&#x987B;&#x5728;&#x4E0B;&#x4E00;&#x4E2A; Init &#x5BB9;&#x5668;&#x542F;&#x52A8;&#x4E4B;&#x524D;&#x6210;&#x529F;&#x5B8C;&#x6210;&#x3002;</li>
</ul>
<p>&#x5982;&#x679C; Pod &#x7684; Init &#x5BB9;&#x5668;&#x5931;&#x8D25;&#xFF0C;Kubernetes &#x4F1A;&#x4E0D;&#x65AD;&#x5730;&#x91CD;&#x542F;&#x8BE5; Pod&#xFF0C;&#x76F4;&#x5230; Init &#x5BB9;&#x5668;&#x6210;&#x529F;&#x4E3A;&#x6B62;&#x3002;&#x7136;&#x800C;&#xFF0C;&#x5982;&#x679C; Pod &#x5BF9;&#x5E94;&#x7684; <code>restartPolicy</code> &#x4E3A; Never&#xFF0C;&#x5B83;&#x4E0D;&#x4F1A;&#x91CD;&#x65B0;&#x542F;&#x52A8;&#x3002;</p>
<p>&#x6307;&#x5B9A;&#x5BB9;&#x5668;&#x4E3A; Init &#x5BB9;&#x5668;&#xFF0C;&#x5728; PodSpec &#x4E2D;&#x6DFB;&#x52A0; <code>initContainers</code> &#x5B57;&#x6BB5;&#xFF0C;&#x4EE5; <a href="https://kubernetes.io/docs/api-reference/v1.6/#container-v1-core" target="_blank">v1.Container</a> &#x7C7B;&#x578B;&#x5BF9;&#x8C61;&#x7684; JSON &#x6570;&#x7EC4;&#x7684;&#x5F62;&#x5F0F;&#xFF0C;&#x8FD8;&#x6709; app &#x7684; <code>containers</code> &#x6570;&#x7EC4;&#x3002; Init &#x5BB9;&#x5668;&#x7684;&#x72B6;&#x6001;&#x5728; <code>status.initContainerStatuses</code> &#x5B57;&#x6BB5;&#x4E2D;&#x4EE5;&#x5BB9;&#x5668;&#x72B6;&#x6001;&#x6570;&#x7EC4;&#x7684;&#x683C;&#x5F0F;&#x8FD4;&#x56DE;&#xFF08;&#x7C7B;&#x4F3C; <code>status.containerStatuses</code> &#x5B57;&#x6BB5;&#xFF09;&#x3002;</p>
<h3 id="&#x4E0E;&#x666E;&#x901A;&#x5BB9;&#x5668;&#x7684;&#x4E0D;&#x540C;&#x4E4B;&#x5904;">&#x4E0E;&#x666E;&#x901A;&#x5BB9;&#x5668;&#x7684;&#x4E0D;&#x540C;&#x4E4B;&#x5904;</h3>
<p>Init &#x5BB9;&#x5668;&#x652F;&#x6301;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x7684;&#x5168;&#x90E8;&#x5B57;&#x6BB5;&#x548C;&#x7279;&#x6027;&#xFF0C;&#x5305;&#x62EC;&#x8D44;&#x6E90;&#x9650;&#x5236;&#x3001;&#x6570;&#x636E;&#x5377;&#x548C;&#x5B89;&#x5168;&#x8BBE;&#x7F6E;&#x3002; &#x7136;&#x800C;&#xFF0C;Init &#x5BB9;&#x5668;&#x5BF9;&#x8D44;&#x6E90;&#x8BF7;&#x6C42;&#x548C;&#x9650;&#x5236;&#x7684;&#x5904;&#x7406;&#x7A0D;&#x6709;&#x4E0D;&#x540C;&#xFF0C;&#x5728;&#x4E0B;&#x9762; <a href="https://kubernetes.io/docs/concepts/workloads/pods/init-containers/#resources" target="_blank">&#x8D44;&#x6E90;</a> &#x5904;&#x6709;&#x8BF4;&#x660E;&#x3002; &#x800C;&#x4E14; Init &#x5BB9;&#x5668;&#x4E0D;&#x652F;&#x6301; Readiness Probe&#xFF0C;&#x56E0;&#x4E3A;&#x5B83;&#x4EEC;&#x5FC5;&#x987B;&#x5728; Pod &#x5C31;&#x7EEA;&#x4E4B;&#x524D;&#x8FD0;&#x884C;&#x5B8C;&#x6210;&#x3002;</p>
<p>&#x5982;&#x679C;&#x4E3A;&#x4E00;&#x4E2A; Pod &#x6307;&#x5B9A;&#x4E86;&#x591A;&#x4E2A; Init &#x5BB9;&#x5668;&#xFF0C;&#x90A3;&#x4E9B;&#x5BB9;&#x5668;&#x4F1A;&#x6309;&#x987A;&#x5E8F;&#x4E00;&#x6B21;&#x8FD0;&#x884C;&#x4E00;&#x4E2A;&#x3002; &#x6BCF;&#x4E2A; Init &#x5BB9;&#x5668;&#x5FC5;&#x987B;&#x8FD0;&#x884C;&#x6210;&#x529F;&#xFF0C;&#x4E0B;&#x4E00;&#x4E2A;&#x624D;&#x80FD;&#x591F;&#x8FD0;&#x884C;&#x3002; &#x5F53;&#x6240;&#x6709;&#x7684; Init &#x5BB9;&#x5668;&#x8FD0;&#x884C;&#x5B8C;&#x6210;&#x65F6;&#xFF0C;Kubernetes &#x521D;&#x59CB;&#x5316; Pod &#x5E76;&#x50CF;&#x5E73;&#x5E38;&#x4E00;&#x6837;&#x8FD0;&#x884C;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x3002;</p>
<h2 id="init-&#x5BB9;&#x5668;&#x80FD;&#x505A;&#x4EC0;&#x4E48;&#xFF1F;">Init &#x5BB9;&#x5668;&#x80FD;&#x505A;&#x4EC0;&#x4E48;&#xFF1F;</h2>
<p>&#x56E0;&#x4E3A; Init &#x5BB9;&#x5668;&#x5177;&#x6709;&#x4E0E;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x5206;&#x79BB;&#x7684;&#x5355;&#x72EC;&#x955C;&#x50CF;&#xFF0C;&#x6240;&#x4EE5;&#x5B83;&#x4EEC;&#x7684;&#x542F;&#x52A8;&#x76F8;&#x5173;&#x4EE3;&#x7801;&#x5177;&#x6709;&#x5982;&#x4E0B;&#x4F18;&#x52BF;&#xFF1A;</p>
<ul>
<li>&#x5B83;&#x4EEC;&#x53EF;&#x4EE5;&#x5305;&#x542B;&#x5E76;&#x8FD0;&#x884C;&#x5B9E;&#x7528;&#x5DE5;&#x5177;&#xFF0C;&#x4F46;&#x662F;&#x51FA;&#x4E8E;&#x5B89;&#x5168;&#x8003;&#x8651;&#xFF0C;&#x662F;&#x4E0D;&#x5EFA;&#x8BAE;&#x5728;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x955C;&#x50CF;&#x4E2D;&#x5305;&#x542B;&#x8FD9;&#x4E9B;&#x5B9E;&#x7528;&#x5DE5;&#x5177;&#x7684;&#x3002;</li>
<li>&#x5B83;&#x4EEC;&#x53EF;&#x4EE5;&#x5305;&#x542B;&#x4F7F;&#x7528;&#x5DE5;&#x5177;&#x548C;&#x5B9A;&#x5236;&#x5316;&#x4EE3;&#x7801;&#x6765;&#x5B89;&#x88C5;&#xFF0C;&#x4F46;&#x662F;&#x4E0D;&#x80FD;&#x51FA;&#x73B0;&#x5728;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x955C;&#x50CF;&#x4E2D;&#x3002;&#x4F8B;&#x5982;&#xFF0C;&#x521B;&#x5EFA;&#x955C;&#x50CF;&#x6CA1;&#x5FC5;&#x8981; <code>FROM</code> &#x53E6;&#x4E00;&#x4E2A;&#x955C;&#x50CF;&#xFF0C;&#x53EA;&#x9700;&#x8981;&#x5728;&#x5B89;&#x88C5;&#x8FC7;&#x7A0B;&#x4E2D;&#x4F7F;&#x7528;&#x7C7B;&#x4F3C; <code>sed</code>&#x3001; <code>awk</code>&#x3001; <code>python</code> &#x6216; <code>dig</code> &#x8FD9;&#x6837;&#x7684;&#x5DE5;&#x5177;&#x3002;</li>
<li>&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x955C;&#x50CF;&#x53EF;&#x4EE5;&#x5206;&#x79BB;&#x51FA;&#x521B;&#x5EFA;&#x548C;&#x90E8;&#x7F72;&#x7684;&#x89D2;&#x8272;&#xFF0C;&#x800C;&#x6CA1;&#x6709;&#x5FC5;&#x8981;&#x8054;&#x5408;&#x5B83;&#x4EEC;&#x6784;&#x5EFA;&#x4E00;&#x4E2A;&#x5355;&#x72EC;&#x7684;&#x955C;&#x50CF;&#x3002;</li>
<li>Init &#x5BB9;&#x5668;&#x4F7F;&#x7528; Linux Namespace&#xFF0C;&#x6240;&#x4EE5;&#x76F8;&#x5BF9;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x6765;&#x8BF4;&#x5177;&#x6709;&#x4E0D;&#x540C;&#x7684;&#x6587;&#x4EF6;&#x7CFB;&#x7EDF;&#x89C6;&#x56FE;&#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x5B83;&#x4EEC;&#x80FD;&#x591F;&#x5177;&#x6709;&#x8BBF;&#x95EE; Secret &#x7684;&#x6743;&#x9650;&#xFF0C;&#x800C;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x5219;&#x4E0D;&#x80FD;&#x3002;</li>
<li>&#x5B83;&#x4EEC;&#x5FC5;&#x987B;&#x5728;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x542F;&#x52A8;&#x4E4B;&#x524D;&#x8FD0;&#x884C;&#x5B8C;&#x6210;&#xFF0C;&#x800C;&#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x5BB9;&#x5668;&#x662F;&#x5E76;&#x884C;&#x8FD0;&#x884C;&#x7684;&#xFF0C;&#x6240;&#x4EE5; Init &#x5BB9;&#x5668;&#x80FD;&#x591F;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x79CD;&#x7B80;&#x5355;&#x7684;&#x963B;&#x585E;&#x6216;&#x5EF6;&#x8FDF;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x7684;&#x542F;&#x52A8;&#x7684;&#x65B9;&#x6CD5;&#xFF0C;&#x76F4;&#x5230;&#x6EE1;&#x8DB3;&#x4E86;&#x4E00;&#x7EC4;&#x5148;&#x51B3;&#x6761;&#x4EF6;&#x3002;</li>
</ul>
<h3 id="&#x793A;&#x4F8B;">&#x793A;&#x4F8B;</h3>
<p>&#x4E0B;&#x9762;&#x662F;&#x4E00;&#x4E9B;&#x5982;&#x4F55;&#x4F7F;&#x7528; Init &#x5BB9;&#x5668;&#x7684;&#x60F3;&#x6CD5;&#xFF1A;</p>
<ul>
<li><p>&#x7B49;&#x5F85;&#x4E00;&#x4E2A; Service &#x521B;&#x5EFA;&#x5B8C;&#x6210;&#xFF0C;&#x901A;&#x8FC7;&#x7C7B;&#x4F3C;&#x5982;&#x4E0B; shell &#x547D;&#x4EE4;&#xFF1A;</p>
<pre><code> for i in {1..100}; do sleep 1; if dig myservice; then exit 0; fi; exit 1
</code></pre></li>
<li><p>&#x5C06; Pod &#x6CE8;&#x518C;&#x5230;&#x8FDC;&#x7A0B;&#x670D;&#x52A1;&#x5668;&#xFF0C;&#x901A;&#x8FC7;&#x5728;&#x547D;&#x4EE4;&#x4E2D;&#x8C03;&#x7528; API&#xFF0C;&#x7C7B;&#x4F3C;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code> curl -X POST http://$MANAGEMENT_SERVICE_HOST:$MANAGEMENT_SERVICE_PORT/register -d &apos;instance=$(&lt;POD_NAME&gt;)&amp;ip=$(&lt;POD_IP&gt;)&apos;
</code></pre></li>
<li><p>&#x5728;&#x542F;&#x52A8;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x4E4B;&#x524D;&#x7B49;&#x4E00;&#x6BB5;&#x65F6;&#x95F4;&#xFF0C;&#x4F7F;&#x7528;&#x7C7B;&#x4F3C; <code>sleep 60</code> &#x7684;&#x547D;&#x4EE4;&#x3002;</p>
</li>
<li><p>&#x514B;&#x9686; Git &#x4ED3;&#x5E93;&#x5230;&#x6570;&#x636E;&#x5377;&#x3002;</p>
</li>
<li><p>&#x5C06;&#x914D;&#x7F6E;&#x503C;&#x653E;&#x5230;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x4E2D;&#xFF0C;&#x8FD0;&#x884C;&#x6A21;&#x677F;&#x5DE5;&#x5177;&#x4E3A;&#x4E3B;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x52A8;&#x6001;&#x5730;&#x751F;&#x6210;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x3002;&#x4F8B;&#x5982;&#xFF0C;&#x5728;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x4E2D;&#x5B58;&#x653E; POD_IP &#x503C;&#xFF0C;&#x5E76;&#x4F7F;&#x7528; Jinja &#x751F;&#x6210;&#x4E3B;&#x5E94;&#x7528;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x3002;</p>
</li>
</ul>
<p>&#x66F4;&#x591A;&#x8BE6;&#x7EC6;&#x7528;&#x6CD5;&#x793A;&#x4F8B;&#xFF0C;&#x53EF;&#x4EE5;&#x5728; <a href="https://kubernetes.io/docs/concepts/abstractions/controllers/statefulsets/" target="_blank">StatefulSet &#x6587;&#x6863;</a> &#x548C; <a href="https://kubernetes.io/docs/user-guide/production-pods.md#handling-initialization" target="_blank">&#x751F;&#x4EA7;&#x73AF;&#x5883; Pod &#x6307;&#x5357;</a> &#x4E2D;&#x627E;&#x5230;&#x3002;</p>
<h3 id="&#x4F7F;&#x7528;-init-&#x5BB9;&#x5668;">&#x4F7F;&#x7528; Init &#x5BB9;&#x5668;</h3>
<p>&#x4E0B;&#x9762;&#x662F; Kubernetes 1.5 &#x7248;&#x672C; yaml &#x6587;&#x4EF6;&#xFF0C;&#x5C55;&#x793A;&#x4E86;&#x4E00;&#x4E2A;&#x5177;&#x6709; 2 &#x4E2A; Init &#x5BB9;&#x5668;&#x7684;&#x7B80;&#x5355; Pod&#x3002; &#x7B2C;&#x4E00;&#x4E2A;&#x7B49;&#x5F85; <code>myservice</code> &#x542F;&#x52A8;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x7B49;&#x5F85; <code>mydb</code> &#x542F;&#x52A8;&#x3002; &#x4E00;&#x65E6;&#x8FD9;&#x4E24;&#x4E2A; Service &#x90FD;&#x542F;&#x52A8;&#x5B8C;&#x6210;&#xFF0C;Pod &#x5C06;&#x5F00;&#x59CB;&#x542F;&#x52A8;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">kind:</span> Pod
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> myapp-pod
<span class="hljs-attr"> labels:</span>
<span class="hljs-attr"> app:</span> myapp
<span class="hljs-attr"> annotations:</span>
pod.beta.kubernetes.io/init-containers: <span class="hljs-string">&apos;[
{
&quot;name&quot;: &quot;init-myservice&quot;,
&quot;image&quot;: &quot;busybox&quot;,
&quot;command&quot;: [&quot;sh&quot;, &quot;-c&quot;, &quot;until nslookup myservice; do echo waiting for myservice; sleep 2; done;&quot;]
},
{
&quot;name&quot;: &quot;init-mydb&quot;,
&quot;image&quot;: &quot;busybox&quot;,
&quot;command&quot;: [&quot;sh&quot;, &quot;-c&quot;, &quot;until nslookup mydb; do echo waiting for mydb; sleep 2; done;&quot;]
}
]&apos;</span>
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> containers:</span>
<span class="hljs-attr"> - name:</span> myapp-container
<span class="hljs-attr"> image:</span> busybox
<span class="hljs-attr"> command:</span> [<span class="hljs-string">&apos;sh&apos;</span>, <span class="hljs-string">&apos;-c&apos;</span>, <span class="hljs-string">&apos;echo The app is running! &amp;&amp; sleep 3600&apos;</span>]
</code></pre>
<p>&#x8FD9;&#x662F; Kubernetes 1.6 &#x7248;&#x672C;&#x7684;&#x65B0;&#x8BED;&#x6CD5;&#xFF0C;&#x5C3D;&#x7BA1;&#x8001;&#x7684; annotation &#x8BED;&#x6CD5;&#x4ECD;&#x7136;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x3002;&#x6211;&#x4EEC;&#x5DF2;&#x7ECF;&#x628A; Init &#x5BB9;&#x5668;&#x7684;&#x58F0;&#x660E;&#x79FB;&#x5230; <code>spec</code> &#x4E2D;&#xFF1A;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">kind:</span> Pod
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> myapp-pod
<span class="hljs-attr"> labels:</span>
<span class="hljs-attr"> app:</span> myapp
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> containers:</span>
<span class="hljs-attr"> - name:</span> myapp-container
<span class="hljs-attr"> image:</span> busybox
<span class="hljs-attr"> command:</span> [<span class="hljs-string">&apos;sh&apos;</span>, <span class="hljs-string">&apos;-c&apos;</span>, <span class="hljs-string">&apos;echo The app is running! &amp;&amp; sleep 3600&apos;</span>]
<span class="hljs-attr"> initContainers:</span>
<span class="hljs-attr"> - name:</span> init-myservice
<span class="hljs-attr"> image:</span> busybox
<span class="hljs-attr"> command:</span> [<span class="hljs-string">&apos;sh&apos;</span>, <span class="hljs-string">&apos;-c&apos;</span>, <span class="hljs-string">&apos;until nslookup myservice; do echo waiting for myservice; sleep 2; done;&apos;</span>]
<span class="hljs-attr"> - name:</span> init-mydb
<span class="hljs-attr"> image:</span> busybox
<span class="hljs-attr"> command:</span> [<span class="hljs-string">&apos;sh&apos;</span>, <span class="hljs-string">&apos;-c&apos;</span>, <span class="hljs-string">&apos;until nslookup mydb; do echo waiting for mydb; sleep 2; done;&apos;</span>]
</code></pre>
<p>1.5 &#x7248;&#x672C;&#x7684;&#x8BED;&#x6CD5;&#x5728; 1.6 &#x7248;&#x672C;&#x4ECD;&#x7136;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#xFF0C;&#x4F46;&#x662F;&#x6211;&#x4EEC;&#x63A8;&#x8350;&#x4F7F;&#x7528; 1.6 &#x7248;&#x672C;&#x7684;&#x65B0;&#x8BED;&#x6CD5;&#x3002; &#x5728; Kubernetes 1.6 &#x7248;&#x672C;&#x4E2D;&#xFF0C;Init &#x5BB9;&#x5668;&#x5728; API &#x4E2D;&#x65B0;&#x5EFA;&#x4E86;&#x4E00;&#x4E2A;&#x5B57;&#x6BB5;&#x3002; &#x867D;&#x7136;&#x671F;&#x671B;&#x4F7F;&#x7528; beta &#x7248;&#x672C;&#x7684; annotation&#xFF0C;&#x4F46;&#x5728;&#x672A;&#x6765;&#x53D1;&#x884C;&#x7248;&#x5C06;&#x4F1A;&#x88AB;&#x5E9F;&#x5F03;&#x6389;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x7684; yaml &#x6587;&#x4EF6;&#x5C55;&#x793A;&#x4E86; <code>mydb</code> &#x548C; <code>myservice</code> &#x4E24;&#x4E2A; Service&#xFF1A;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> myservice
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9376</span>
<span class="hljs-meta">---</span>
<span class="hljs-attr">kind:</span> Service
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> mydb
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - protocol:</span> TCP
<span class="hljs-attr"> port:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> targetPort:</span> <span class="hljs-number">9377</span>
</code></pre>
<p>&#x8FD9;&#x4E2A; Pod &#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x4E0B;&#x9762;&#x7684;&#x547D;&#x4EE4;&#x8FDB;&#x884C;&#x542F;&#x52A8;&#x548C;&#x8C03;&#x8BD5;&#xFF1A;</p>
<pre><code class="lang-bash">$ kubectl create <span class="hljs-_">-f</span> myapp.yaml
pod <span class="hljs-string">&quot;myapp-pod&quot;</span> created
$ kubectl get <span class="hljs-_">-f</span> myapp.yaml
NAME READY STATUS RESTARTS AGE
myapp-pod 0/1 Init:0/2 0 6m
$ kubectl describe <span class="hljs-_">-f</span> myapp.yaml
Name: myapp-pod
Namespace: default
[...]
Labels: app=myapp
Status: Pending
[...]
Init Containers:
init-myservice:
[...]
State: Running
[...]
init-mydb:
[...]
State: Waiting
Reason: PodInitializing
Ready: False
[...]
Containers:
myapp-container:
[...]
State: Waiting
Reason: PodInitializing
Ready: False
[...]
Events:
FirstSeen LastSeen Count From SubObjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
16s 16s 1 {default-scheduler } Normal Scheduled Successfully assigned myapp-pod to 172.17.4.201
16s 16s 1 {kubelet 172.17.4.201} spec.initContainers{init-myservice} Normal Pulling pulling image <span class="hljs-string">&quot;busybox&quot;</span>
13s 13s 1 {kubelet 172.17.4.201} spec.initContainers{init-myservice} Normal Pulled Successfully pulled image <span class="hljs-string">&quot;busybox&quot;</span>
13s 13s 1 {kubelet 172.17.4.201} spec.initContainers{init-myservice} Normal Created Created container with docker id 5ced34a04634; Security:[seccomp=unconfined]
13s 13s 1 {kubelet 172.17.4.201} spec.initContainers{init-myservice} Normal Started Started container with docker id 5ced34a04634
$ kubectl logs myapp-pod -c init-myservice <span class="hljs-comment"># Inspect the first init container</span>
$ kubectl logs myapp-pod -c init-mydb <span class="hljs-comment"># Inspect the second init container</span>
</code></pre>
<p>&#x4E00;&#x65E6;&#x6211;&#x4EEC;&#x542F;&#x52A8;&#x4E86; <code>mydb</code> &#x548C; <code>myservice</code> &#x8FD9;&#x4E24;&#x4E2A; Service&#xFF0C;&#x6211;&#x4EEC;&#x80FD;&#x591F;&#x770B;&#x5230; Init &#x5BB9;&#x5668;&#x5B8C;&#x6210;&#xFF0C;&#x5E76;&#x4E14; <code>myapp-pod</code> &#x88AB;&#x521B;&#x5EFA;&#xFF1A;</p>
<pre><code class="lang-Bash">$ kubectl create <span class="hljs-_">-f</span> services.yaml
service <span class="hljs-string">&quot;myservice&quot;</span> created
service <span class="hljs-string">&quot;mydb&quot;</span> created
$ kubectl get <span class="hljs-_">-f</span> myapp.yaml
NAME READY STATUS RESTARTS AGE
myapp-pod 1/1 Running 0 9m
</code></pre>
<p>&#x8FD9;&#x4E2A;&#x4F8B;&#x5B50;&#x975E;&#x5E38;&#x7B80;&#x5355;&#xFF0C;&#x4F46;&#x662F;&#x5E94;&#x8BE5;&#x80FD;&#x591F;&#x4E3A;&#x6211;&#x4EEC;&#x521B;&#x5EFA;&#x81EA;&#x5DF1;&#x7684; Init &#x5BB9;&#x5668;&#x63D0;&#x4F9B;&#x4E00;&#x4E9B;&#x542F;&#x53D1;&#x3002;</p>
<h2 id="&#x5177;&#x4F53;&#x884C;&#x4E3A;">&#x5177;&#x4F53;&#x884C;&#x4E3A;</h2>
<p>&#x5728; Pod &#x542F;&#x52A8;&#x8FC7;&#x7A0B;&#x4E2D;&#xFF0C;Init &#x5BB9;&#x5668;&#x4F1A;&#x6309;&#x987A;&#x5E8F;&#x5728;&#x7F51;&#x7EDC;&#x548C;&#x6570;&#x636E;&#x5377;&#x521D;&#x59CB;&#x5316;&#x4E4B;&#x540E;&#x542F;&#x52A8;&#x3002; &#x6BCF;&#x4E2A;&#x5BB9;&#x5668;&#x5FC5;&#x987B;&#x5728;&#x4E0B;&#x4E00;&#x4E2A;&#x5BB9;&#x5668;&#x542F;&#x52A8;&#x4E4B;&#x524D;&#x6210;&#x529F;&#x9000;&#x51FA;&#x3002; &#x5982;&#x679C;&#x7531;&#x4E8E;&#x8FD0;&#x884C;&#x65F6;&#x6216;&#x5931;&#x8D25;&#x9000;&#x51FA;&#xFF0C;&#x5BFC;&#x81F4;&#x5BB9;&#x5668;&#x542F;&#x52A8;&#x5931;&#x8D25;&#xFF0C;&#x5B83;&#x4F1A;&#x6839;&#x636E; Pod &#x7684; <code>restartPolicy</code> &#x6307;&#x5B9A;&#x7684;&#x7B56;&#x7565;&#x8FDB;&#x884C;&#x91CD;&#x8BD5;&#x3002; &#x7136;&#x800C;&#xFF0C;&#x5982;&#x679C; Pod &#x7684; <code>restartPolicy</code> &#x8BBE;&#x7F6E;&#x4E3A; Always&#xFF0C;Init &#x5BB9;&#x5668;&#x5931;&#x8D25;&#x65F6;&#x4F1A;&#x4F7F;&#x7528; <code>RestartPolicy</code> &#x7B56;&#x7565;&#x3002;</p>
<p>&#x5728;&#x6240;&#x6709;&#x7684; Init &#x5BB9;&#x5668;&#x6CA1;&#x6709;&#x6210;&#x529F;&#x4E4B;&#x524D;&#xFF0C;Pod &#x5C06;&#x4E0D;&#x4F1A;&#x53D8;&#x6210; <code>Ready</code> &#x72B6;&#x6001;&#x3002; Init &#x5BB9;&#x5668;&#x7684;&#x7AEF;&#x53E3;&#x5C06;&#x4E0D;&#x4F1A;&#x5728; Service &#x4E2D;&#x8FDB;&#x884C;&#x805A;&#x96C6;&#x3002; &#x6B63;&#x5728;&#x521D;&#x59CB;&#x5316;&#x4E2D;&#x7684; Pod &#x5904;&#x4E8E; <code>Pending</code> &#x72B6;&#x6001;&#xFF0C;&#x4F46;&#x5E94;&#x8BE5;&#x4F1A;&#x5C06;&#x6761;&#x4EF6; <code>Initializing</code> &#x8BBE;&#x7F6E;&#x4E3A; true&#x3002;</p>
<p>&#x5982;&#x679C; Pod <a href="https://kubernetes.io/docs/concepts/workloads/pods/init-containers/#pod-restart-reasons" target="_blank">&#x91CD;&#x542F;</a>&#xFF0C;&#x6240;&#x6709; Init &#x5BB9;&#x5668;&#x5FC5;&#x987B;&#x91CD;&#x65B0;&#x6267;&#x884C;&#x3002;</p>
<p>&#x5BF9; Init &#x5BB9;&#x5668; spec &#x7684;&#x4FEE;&#x6539;&#xFF0C;&#x88AB;&#x9650;&#x5236;&#x5728;&#x5BB9;&#x5668; image &#x5B57;&#x6BB5;&#x4E2D;&#x3002; &#x66F4;&#x6539; Init &#x5BB9;&#x5668;&#x7684; image &#x5B57;&#x6BB5;&#xFF0C;&#x7B49;&#x4EF7;&#x4E8E;&#x91CD;&#x542F;&#x8BE5; Pod&#x3002;</p>
<p>&#x56E0;&#x4E3A; Init &#x5BB9;&#x5668;&#x53EF;&#x80FD;&#x4F1A;&#x88AB;&#x91CD;&#x542F;&#x3001;&#x91CD;&#x8BD5;&#x6216;&#x8005;&#x91CD;&#x65B0;&#x6267;&#x884C;&#xFF0C;&#x6240;&#x4EE5; Init &#x5BB9;&#x5668;&#x7684;&#x4EE3;&#x7801;&#x5E94;&#x8BE5;&#x662F;&#x5E42;&#x7B49;&#x7684;&#x3002; &#x7279;&#x522B;&#x5730;&#xFF0C;&#x88AB;&#x5199;&#x5230; <code>EmptyDirs</code> &#x4E2D;&#x6587;&#x4EF6;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x5E94;&#x8BE5;&#x5BF9;&#x8F93;&#x51FA;&#x6587;&#x4EF6;&#x53EF;&#x80FD;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x505A;&#x597D;&#x51C6;&#x5907;&#x3002;</p>
<p>Init &#x5BB9;&#x5668;&#x5177;&#x6709;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x7684;&#x6240;&#x6709;&#x5B57;&#x6BB5;&#x3002; &#x9664;&#x4E86; <code>readinessProbe</code>&#xFF0C;&#x56E0;&#x4E3A; Init &#x5BB9;&#x5668;&#x65E0;&#x6CD5;&#x5B9A;&#x4E49;&#x4E0D;&#x540C;&#x4E8E;&#x5B8C;&#x6210;&#xFF08;completion&#xFF09;&#x7684;&#x5C31;&#x7EEA;&#xFF08;readiness&#xFF09;&#x7684;&#x4E4B;&#x5916;&#x7684;&#x5176;&#x4ED6;&#x72B6;&#x6001;&#x3002; &#x8FD9;&#x4F1A;&#x5728;&#x9A8C;&#x8BC1;&#x8FC7;&#x7A0B;&#x4E2D;&#x5F3A;&#x5236;&#x6267;&#x884C;&#x3002;</p>
<p>&#x5728; Pod &#x4E0A;&#x4F7F;&#x7528; <code>activeDeadlineSeconds</code>&#xFF0C;&#x5728;&#x5BB9;&#x5668;&#x4E0A;&#x4F7F;&#x7528; <code>livenessProbe</code>&#xFF0C;&#x8FD9;&#x6837;&#x80FD;&#x591F;&#x907F;&#x514D; Init &#x5BB9;&#x5668;&#x4E00;&#x76F4;&#x5931;&#x8D25;&#x3002; &#x8FD9;&#x5C31;&#x4E3A; Init &#x5BB9;&#x5668;&#x6D3B;&#x8DC3;&#x8BBE;&#x7F6E;&#x4E86;&#x4E00;&#x4E2A;&#x671F;&#x9650;&#x3002;</p>
<p>&#x5728; Pod &#x4E2D;&#x7684;&#x6BCF;&#x4E2A; app &#x548C; Init &#x5BB9;&#x5668;&#x7684;&#x540D;&#x79F0;&#x5FC5;&#x987B;&#x552F;&#x4E00;&#xFF1B;&#x4E0E;&#x4EFB;&#x4F55;&#x5176;&#x5B83;&#x5BB9;&#x5668;&#x5171;&#x4EAB;&#x540C;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#xFF0C;&#x4F1A;&#x5728;&#x9A8C;&#x8BC1;&#x65F6;&#x629B;&#x51FA;&#x9519;&#x8BEF;&#x3002;</p>
<h3 id="&#x8D44;&#x6E90;">&#x8D44;&#x6E90;</h3>
<p>&#x4E3A; Init &#x5BB9;&#x5668;&#x6307;&#x5B9A;&#x987A;&#x5E8F;&#x548C;&#x6267;&#x884C;&#x903B;&#x8F91;&#xFF0C;&#x4E0B;&#x9762;&#x5BF9;&#x8D44;&#x6E90;&#x4F7F;&#x7528;&#x7684;&#x89C4;&#x5219;&#x5C06;&#x88AB;&#x5E94;&#x7528;&#xFF1A;</p>
<ul>
<li>&#x5728;&#x6240;&#x6709; Init &#x5BB9;&#x5668;&#x4E0A;&#x5B9A;&#x4E49;&#x7684;&#xFF0C;&#x4EFB;&#x4F55;&#x7279;&#x6B8A;&#x8D44;&#x6E90;&#x8BF7;&#x6C42;&#x6216;&#x9650;&#x5236;&#x7684;&#x6700;&#x5927;&#x503C;&#xFF0C;&#x662F; <em>&#x6709;&#x6548;&#x521D;&#x59CB;&#x8BF7;&#x6C42;/&#x9650;&#x5236;</em></li>
<li><p>Pod &#x5BF9;&#x8D44;&#x6E90;&#x7684;&#x6709;&#x6548;&#x8BF7;&#x6C42;/&#x9650;&#x5236;&#x8981;&#x9AD8;&#x4E8E;&#xFF1A;</p>
<ul>
<li>&#x6240;&#x6709;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x5BF9;&#x67D0;&#x4E2A;&#x8D44;&#x6E90;&#x7684;&#x8BF7;&#x6C42;/&#x9650;&#x5236;&#x4E4B;&#x548C;</li>
<li>&#x5BF9;&#x67D0;&#x4E2A;&#x8D44;&#x6E90;&#x7684;&#x6709;&#x6548;&#x521D;&#x59CB;&#x8BF7;&#x6C42;/&#x9650;&#x5236;</li>
</ul>
</li>
<li><p>&#x57FA;&#x4E8E;&#x6709;&#x6548;&#x8BF7;&#x6C42;/&#x9650;&#x5236;&#x5B8C;&#x6210;&#x8C03;&#x5EA6;&#xFF0C;&#x8FD9;&#x610F;&#x5473;&#x7740; Init &#x5BB9;&#x5668;&#x80FD;&#x591F;&#x4E3A;&#x521D;&#x59CB;&#x5316;&#x9884;&#x7559;&#x8D44;&#x6E90;&#xFF0C;&#x8FD9;&#x4E9B;&#x8D44;&#x6E90;&#x5728; Pod &#x751F;&#x547D;&#x5468;&#x671F;&#x8FC7;&#x7A0B;&#x4E2D;&#x5E76;&#x6CA1;&#x6709;&#x88AB;&#x4F7F;&#x7528;&#x3002;</p>
</li>
<li><p>Pod &#x7684; <em>&#x6709;&#x6548; QoS &#x5C42;</em>&#xFF0C;&#x662F; Init &#x5BB9;&#x5668;&#x548C;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x76F8;&#x540C;&#x7684; QoS &#x5C42;&#x3002;</p>
</li>
</ul>
<p>&#x57FA;&#x4E8E;&#x6709;&#x6548; Pod &#x8BF7;&#x6C42;&#x548C;&#x9650;&#x5236;&#x6765;&#x5E94;&#x7528;&#x914D;&#x989D;&#x548C;&#x9650;&#x5236;&#x3002; Pod &#x7EA7;&#x522B;&#x7684; cgroups &#x662F;&#x57FA;&#x4E8E;&#x6709;&#x6548; Pod &#x8BF7;&#x6C42;&#x548C;&#x9650;&#x5236;&#xFF0C;&#x548C;&#x8C03;&#x5EA6;&#x5668;&#x76F8;&#x540C;&#x3002;</p>
<h3 id="pod-&#x91CD;&#x542F;&#x7684;&#x539F;&#x56E0;">Pod &#x91CD;&#x542F;&#x7684;&#x539F;&#x56E0;</h3>
<p>Pod &#x80FD;&#x591F;&#x91CD;&#x542F;&#xFF0C;&#x4F1A;&#x5BFC;&#x81F4; Init &#x5BB9;&#x5668;&#x91CD;&#x65B0;&#x6267;&#x884C;&#xFF0C;&#x4E3B;&#x8981;&#x6709;&#x5982;&#x4E0B;&#x51E0;&#x4E2A;&#x539F;&#x56E0;&#xFF1A;</p>
<ul>
<li>&#x7528;&#x6237;&#x66F4;&#x65B0; PodSpec &#x5BFC;&#x81F4; Init &#x5BB9;&#x5668;&#x955C;&#x50CF;&#x53D1;&#x751F;&#x6539;&#x53D8;&#x3002;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x955C;&#x50CF;&#x7684;&#x53D8;&#x66F4;&#x53EA;&#x4F1A;&#x91CD;&#x542F;&#x5E94;&#x7528;&#x5BB9;&#x5668;&#x3002;</li>
<li>Pod &#x57FA;&#x7840;&#x8BBE;&#x65BD;&#x5BB9;&#x5668;&#x88AB;&#x91CD;&#x542F;&#x3002;&#x8FD9;&#x4E0D;&#x591A;&#x89C1;&#xFF0C;&#x4F46;&#x67D0;&#x4E9B;&#x5177;&#x6709; root &#x6743;&#x9650;&#x53EF;&#x8BBF;&#x95EE; Node &#x7684;&#x4EBA;&#x53EF;&#x80FD;&#x4F1A;&#x8FD9;&#x6837;&#x505A;&#x3002;</li>
<li>&#x5F53; <code>restartPolicy</code> &#x8BBE;&#x7F6E;&#x4E3A; Always&#xFF0C;Pod &#x4E2D;&#x6240;&#x6709;&#x5BB9;&#x5668;&#x4F1A;&#x7EC8;&#x6B62;&#xFF0C;&#x5F3A;&#x5236;&#x91CD;&#x542F;&#xFF0C;&#x7531;&#x4E8E;&#x5783;&#x573E;&#x6536;&#x96C6;&#x5BFC;&#x81F4; Init &#x5BB9;&#x5668;&#x5B8C;&#x6210;&#x7684;&#x8BB0;&#x5F55;&#x4E22;&#x5931;&#x3002;</li>
</ul>
<h2 id="&#x652F;&#x6301;&#x4E0E;&#x517C;&#x5BB9;&#x6027;">&#x652F;&#x6301;&#x4E0E;&#x517C;&#x5BB9;&#x6027;</h2>
<p>Apiserver &#x7248;&#x672C;&#x4E3A; 1.6 &#x6216;&#x66F4;&#x9AD8;&#x7248;&#x672C;&#x7684;&#x96C6;&#x7FA4;&#xFF0C;&#x901A;&#x8FC7;&#x4F7F;&#x7528; <code>spec.initContainers</code> &#x5B57;&#x6BB5;&#x6765;&#x652F;&#x6301; Init &#x5BB9;&#x5668;&#x3002; &#x4E4B;&#x524D;&#x7684;&#x7248;&#x672C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; alpha &#x548C; beta &#x6CE8;&#x89E3;&#x652F;&#x6301; Init &#x5BB9;&#x5668;&#x3002; <code>spec.initContainers</code> &#x5B57;&#x6BB5;&#x4E5F;&#x88AB;&#x52A0;&#x5165;&#x5230; alpha &#x548C; beta &#x6CE8;&#x89E3;&#x4E2D;&#xFF0C;&#x6240;&#x4EE5; Kubernetes 1.3.0 &#x7248;&#x672C;&#x6216;&#x66F4;&#x9AD8;&#x7248;&#x672C;&#x53EF;&#x4EE5;&#x6267;&#x884C; Init &#x5BB9;&#x5668;&#xFF0C;&#x5E76;&#x4E14; 1.6 &#x7248;&#x672C;&#x7684; apiserver &#x80FD;&#x591F;&#x5B89;&#x5168;&#x7684;&#x56DE;&#x9000;&#x5230; 1.5.x &#x7248;&#x672C;&#xFF0C;&#x800C;&#x4E0D;&#x4F1A;&#x4F7F;&#x5B58;&#x5728;&#x7684;&#x5DF2;&#x521B;&#x5EFA; Pod &#x5931;&#x53BB; Init &#x5BB9;&#x5668;&#x7684;&#x529F;&#x80FD;&#x3002;</p>
<p>&#x539F;&#x6587;&#x5730;&#x5740;&#xFF1A;<a href="https://k8smeetup.github.io/docs/concepts/workloads/pods/init-containers/" target="_blank">https://k8smeetup.github.io/docs/concepts/workloads/pods/init-containers/</a></p>
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<p>&#x8BD1;&#x8005;&#xFF1A;<a href="https://github.com/shirdrn" target="_blank">shirdrn</a> </p>
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