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序言
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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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2.2.15.1 ConfigMap的热更新
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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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2.2.20 Annotation
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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 docker用户过度到kubectl命令行指南
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3.2.2 kubectl命令概览
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3.2.3 kubectl命令技巧大全
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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 创建用户认证授权的kubeconfig文件
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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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3.3.7 使用kubeconfig或token进行用户身份认证
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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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3.5.3 使用StatefulSet部署用状态应用
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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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<li class="chapter " data-level="1.5.1.5" data-path="../practice/master-installation.html">
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4.1.5 部署master节点
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<a href="../practice/node-installation.html">
4.1.6 部署node节点
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<li class="chapter " data-level="1.5.1.7" data-path="../practice/kubedns-addon-installation.html">
<a href="../practice/kubedns-addon-installation.html">
4.1.7 安装kubedns插件
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<li class="chapter " data-level="1.5.1.8" data-path="../practice/dashboard-addon-installation.html">
<a href="../practice/dashboard-addon-installation.html">
4.1.8 安装dashboard插件
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<li class="chapter " data-level="1.5.1.9" data-path="../practice/heapster-addon-installation.html">
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4.1.9 安装heapster插件
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<li class="chapter " data-level="1.5.1.10" data-path="../practice/efk-addon-installation.html">
<a href="../practice/efk-addon-installation.html">
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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<li class="chapter " data-level="1.5.2.1" data-path="../practice/traefik-ingress-installation.html">
<a href="../practice/traefik-ingress-installation.html">
4.2.1 安装Traefik ingress
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<li class="chapter " data-level="1.5.2.2" data-path="../practice/distributed-load-test.html">
<a href="../practice/distributed-load-test.html">
4.2.2 分布式负载测试
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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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<li class="chapter " data-level="1.5.2.5" data-path="../practice/nginx-ingress-installation.html">
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4.2.5 安装Nginx ingress
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4.3 运维管理
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<li class="chapter " data-level="1.5.3.1" data-path="../practice/service-rolling-update.html">
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4.3.1 服务滚动升级
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<li class="chapter " data-level="1.5.3.2" data-path="../practice/app-log-collection.html">
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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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4.3.6 数据持久化问题
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<a href="../practice/manage-compute-resources-container.html">
4.3.7 管理容器的计算资源
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4.4 存储管理
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<li class="chapter " data-level="1.5.4.1" data-path="../practice/glusterfs.html">
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4.4.1 GlusterFS
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<li class="chapter " data-level="1.5.4.1.1" 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="1.5.4.1.2" 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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4.4.2 CephFS
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<a href="../practice/using-ceph-for-persistent-storage.html">
4.4.2.1 使用Ceph做持久化存储
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</ul>
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</ul>
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4.5 集群与应用监控
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<li class="chapter " data-level="1.5.5.1" data-path="../practice/heapster.html">
<a href="../practice/heapster.html">
4.5.1 Heapster
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<li class="chapter " data-level="1.5.5.1.1" data-path="../practice/using-heapster-to-get-object-metrics.html">
<a href="../practice/using-heapster-to-get-object-metrics.html">
4.5.1.1 使用Heapster获取集群和对象的metric数据
</a>
</li>
</ul>
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4.5.2 Prometheus
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<a href="../practice/using-prometheus-to-monitor-kuberentes-cluster.html">
4.5.2.1 使用Prometheus监控kubernetes集群
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="1.5.6" data-path="../practice/services-management-tool.html">
<a href="../practice/services-management-tool.html">
4.6 服务编排管理
</a>
<ul class="articles">
<li class="chapter " data-level="1.5.6.1" data-path="../practice/helm.html">
<a href="../practice/helm.html">
4.6.1 使用Helm管理kubernetes应用
</a>
</li>
<li class="chapter " data-level="1.5.6.2" data-path="../practice/create-private-charts-repo.html">
<a href="../practice/create-private-charts-repo.html">
4.6.2 构建私有Chart仓库
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.5.7" data-path="../practice/ci-cd.html">
<a href="../practice/ci-cd.html">
4.7 持续集成与发布
</a>
<ul class="articles">
<li class="chapter " data-level="1.5.7.1" data-path="../practice/jenkins-ci-cd.html">
<a href="../practice/jenkins-ci-cd.html">
4.7.1 使用Jenkins进行持续集成与发布
</a>
</li>
<li class="chapter " data-level="1.5.7.2" data-path="../practice/drone-ci-cd.html">
<a href="../practice/drone-ci-cd.html">
4.7.2 使用Drone进行持续集成与发布
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.5.8" data-path="../practice/update-and-upgrade.html">
<a href="../practice/update-and-upgrade.html">
4.8 更新与升级
</a>
<ul class="articles">
<li class="chapter " data-level="1.5.8.1" data-path="../practice/manually-upgrade.html">
<a href="../practice/manually-upgrade.html">
4.8.1 手动升级kubernetes集群
</a>
</li>
<li class="chapter " data-level="1.5.8.2" data-path="../practice/dashboard-upgrade.html">
<a href="../practice/dashboard-upgrade.html">
4.8.2 升级dashboard
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="1.6" data-path="../usecases/">
<a href="../usecases/">
5. 领域应用
</a>
<ul class="articles">
<li class="chapter " data-level="1.6.1" data-path="../usecases/microservices.html">
<a href="../usecases/microservices.html">
5.1 微服务架构
</a>
<ul class="articles">
<li class="chapter " data-level="1.6.1.1" 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="1.6.2" 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="1.6.2.1" data-path="../usecases/istio.html">
<a href="../usecases/istio.html">
5.1.1 Istio
</a>
<ul class="articles">
<li class="chapter " data-level="1.6.2.1.1" data-path="../usecases/istio-installation.html">
<a href="../usecases/istio-installation.html">
5.1.1.1 安装并试用Istio service mesh
</a>
</li>
<li class="chapter " data-level="1.6.2.1.2" data-path="../usecases/configuring-request-routing.html">
<a href="../usecases/configuring-request-routing.html">
5.1.1.2 配置请求的路由规则
</a>
</li>
<li class="chapter " data-level="1.6.2.1.3" data-path="../usecases/install-and-expand-istio-mesh.html">
<a href="../usecases/install-and-expand-istio-mesh.html">
5.1.1.3 安装和拓展Istio service mesh
</a>
</li>
<li class="chapter " data-level="1.6.2.1.4" data-path="../usecases/integrating-vms.html">
<a href="../usecases/integrating-vms.html">
5.1.1.4 集成虚拟机
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.6.2.2" data-path="../usecases/linkerd.html">
<a href="../usecases/linkerd.html">
5.1.2 Linkerd
</a>
<ul class="articles">
<li class="chapter " data-level="1.6.2.2.1" data-path="../usecases/linkerd-user-guide.html">
<a href="../usecases/linkerd-user-guide.html">
5.1.2.1 Linkerd 使用指南
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="1.6.3" data-path="../usecases/big-data.html">
<a href="../usecases/big-data.html">
5.2 大数据
</a>
<ul class="articles">
<li class="chapter " data-level="1.6.3.1" data-path="../usecases/spark-standalone-on-kubernetes.html">
<a href="../usecases/spark-standalone-on-kubernetes.html">
5.2.1 Spark standalone on Kubernetes
</a>
</li>
<li class="chapter " data-level="1.6.3.2" data-path="../usecases/running-spark-with-kubernetes-native-scheduler.html">
<a href="../usecases/running-spark-with-kubernetes-native-scheduler.html">
5.2.2 运行支持kubernetes原生调度的Spark程序
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.6.4" data-path="../usecases/serverless.html">
<a href="../usecases/serverless.html">
5.3 Serverless架构
</a>
</li>
<li class="chapter " data-level="1.6.5" data-path="../usecases/edge-computing.html">
<a href="../usecases/edge-computing.html">
5.4 边缘计算
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.7" data-path="../develop/">
<a href="../develop/">
6. 开发指南
</a>
<ul class="articles">
<li class="chapter " data-level="1.7.1" 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="1.7.2" 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="1.7.3" 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="1.7.4" data-path="../develop/contribute.html">
<a href="../develop/contribute.html">
6.4 社区贡献
</a>
</li>
<li class="chapter " data-level="1.7.5" data-path="../develop/minikube.html">
<a href="../develop/minikube.html">
6.5 Minikube
</a>
</li>
</ul>
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<li class="chapter " data-level="1.8" data-path="../appendix/">
<a href="../appendix/">
7. 附录
</a>
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<li class="chapter " data-level="1.8.1" 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="1.8.2" data-path="../appendix/issues.html">
<a href="../appendix/issues.html">
7.2 问题记录
</a>
</li>
<li class="chapter " data-level="1.8.3" data-path="../appendix/tricks.html">
<a href="../appendix/tricks.html">
7.3 使用技巧
</a>
</li>
<li class="chapter " data-level="1.8.4" data-path="../appendix/debug-kubernetes-services.html">
<a href="../appendix/debug-kubernetes-services.html">
7.4 kubernetes中的应用故障排查
</a>
</li>
<li class="chapter " data-level="1.8.5" data-path="../appendix/material-share.html">
<a href="../appendix/material-share.html">
7.5 Kubernetes相关资讯和情报链接
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<a href=".." >2.2.15.1 ConfigMap的热更新</a>
</h1>
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<h1 id="configmap&#x7684;&#x70ED;&#x66F4;&#x65B0;">ConfigMap&#x7684;&#x70ED;&#x66F4;&#x65B0;</h1>
<p>ConfigMap&#x662F;&#x7528;&#x6765;&#x5B58;&#x50A8;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x7684;kubernetes&#x8D44;&#x6E90;&#x5BF9;&#x8C61;&#xFF0C;&#x6240;&#x6709;&#x7684;&#x914D;&#x7F6E;&#x5185;&#x5BB9;&#x90FD;&#x5B58;&#x50A8;&#x5728;etcd&#x4E2D;&#xFF0C;&#x4E0B;&#x6587;&#x4E3B;&#x8981;&#x662F;&#x63A2;&#x7A76; ConfigMap &#x7684;&#x521B;&#x5EFA;&#x548C;&#x66F4;&#x65B0;&#x6D41;&#x7A0B;&#xFF0C;&#x4EE5;&#x53CA;&#x5BF9; ConfigMap &#x66F4;&#x65B0;&#x540E;&#x5BB9;&#x5668;&#x5185;&#x6302;&#x8F7D;&#x7684;&#x5185;&#x5BB9;&#x662F;&#x5426;&#x540C;&#x6B65;&#x66F4;&#x65B0;&#x7684;&#x6D4B;&#x8BD5;&#x3002;</p>
<h2 id="&#x6D4B;&#x8BD5;&#x793A;&#x4F8B;">&#x6D4B;&#x8BD5;&#x793A;&#x4F8B;</h2>
<p>&#x5047;&#x8BBE;&#x6211;&#x4EEC;&#x5728; <code>default</code> namespace &#x4E0B;&#x6709;&#x4E00;&#x4E2A;&#x540D;&#x4E3A; <code>nginx-config</code> &#x7684; ConfigMap&#xFF0C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; <code>kubectl</code>&#x547D;&#x4EE4;&#x6765;&#x83B7;&#x53D6;&#xFF1A;</p>
<pre><code class="lang-bash">$ kubectl get configmap nginx-config
NAME DATA AGE
nginx-config 1 99d
</code></pre>
<p>&#x83B7;&#x53D6;&#x8BE5;ConfigMap&#x7684;&#x5185;&#x5BB9;&#x3002;</p>
<pre><code class="lang-bash">kubectl get configmap nginx-config -o yaml
</code></pre>
<pre><code class="lang-bash">apiVersion: v1
data:
nginx.conf: |-
worker_processes 1;
events { worker_connections 1024; }
http {
sendfile on;
server {
listen 80;
<span class="hljs-comment"># a test endpoint that returns http 200s</span>
location / {
proxy_pass http://httpstat.us/200;
proxy_<span class="hljs-built_in">set</span>_header X-Real-IP <span class="hljs-variable">$remote_addr</span>;
}
}
server {
listen 80;
server_name api.hello.world;
location / {
proxy_pass http://l5d.default.svc.cluster.local;
proxy_<span class="hljs-built_in">set</span>_header Host <span class="hljs-variable">$host</span>;
proxy_<span class="hljs-built_in">set</span>_header Connection <span class="hljs-string">&quot;&quot;</span>;
proxy_http_version 1.1;
more_clear_input_headers <span class="hljs-string">&apos;l5d-ctx-*&apos;</span> <span class="hljs-string">&apos;l5d-dtab&apos;</span> <span class="hljs-string">&apos;l5d-sample&apos;</span>;
}
}
server {
listen 80;
server_name www.hello.world;
location / {
<span class="hljs-comment"># allow &apos;employees&apos; to perform dtab overrides</span>
<span class="hljs-keyword">if</span> (<span class="hljs-variable">$cookie_special_employee_cookie</span> != <span class="hljs-string">&quot;letmein&quot;</span>) {
more_clear_input_headers <span class="hljs-string">&apos;l5d-ctx-*&apos;</span> <span class="hljs-string">&apos;l5d-dtab&apos;</span> <span class="hljs-string">&apos;l5d-sample&apos;</span>;
}
<span class="hljs-comment"># add a dtab override to get people to our beta, world-v2</span>
<span class="hljs-built_in">set</span> <span class="hljs-variable">$xheader</span> <span class="hljs-string">&quot;&quot;</span>;
<span class="hljs-keyword">if</span> (<span class="hljs-variable">$cookie_special_employee_cookie</span> ~* <span class="hljs-string">&quot;dogfood&quot;</span>) {
<span class="hljs-built_in">set</span> <span class="hljs-variable">$xheader</span> <span class="hljs-string">&quot;/host/world =&gt; /srv/world-v2;&quot;</span>;
}
proxy_<span class="hljs-built_in">set</span>_header <span class="hljs-string">&apos;l5d-dtab&apos;</span> <span class="hljs-variable">$xheader</span>;
proxy_pass http://l5d.default.svc.cluster.local;
proxy_<span class="hljs-built_in">set</span>_header Host <span class="hljs-variable">$host</span>;
proxy_<span class="hljs-built_in">set</span>_header Connection <span class="hljs-string">&quot;&quot;</span>;
proxy_http_version 1.1;
}
}
}
kind: ConfigMap
metadata:
creationTimestamp: 2017-08-01T06:53:17Z
name: nginx-config
namespace: default
resourceVersion: <span class="hljs-string">&quot;14925806&quot;</span>
selfLink: /api/v1/namespaces/default/configmaps/nginx-config
uid: 18d70527-7686-11e7-bfbd-8af1e3a7c5bd
</code></pre>
<p>ConfigMap&#x4E2D;&#x7684;&#x5185;&#x5BB9;&#x662F;&#x5B58;&#x50A8;&#x5230;etcd&#x4E2D;&#x7684;&#xFF0C;&#x7136;&#x540E;&#x67E5;&#x8BE2;etcd&#xFF1A;</p>
<pre><code class="lang-bash">ETCDCTL_API=3 etcdctl get /registry/configmaps/default/nginx-config
/registry/configmaps/default/nginx-config
</code></pre>
<p>&#x6CE8;&#x610F;&#x4F7F;&#x7528; v3 &#x7248;&#x672C;&#x7684; etcdctl API&#xFF0C;&#x4E0B;&#x9762;&#x662F;&#x8F93;&#x51FA;&#x7ED3;&#x679C;&#xFF1A;</p>
<pre><code class="lang-bash">k8s
v1 ConfigMap&#xFFFD;
T
nginx-configdefault<span class="hljs-string">&quot;*<span class="hljs-variable">$18d70527</span>-7686-11e7-bfbd-8af1e3a7c5bd28B
&#xFFFD;&#x280;&#xFFFD;&#xFFFD;&#xFFFD;&#xFFFD;xz&#xFFFD;
nginx.conf&#xFFFD;
worker_processes 1;
events { worker_connections 1024; }
http {
sendfile on;
server {
listen 80;
# a test endpoint that returns http 200s
location / {
proxy_pass http://httpstat.us/200;
proxy_set_header X-Real-IP <span class="hljs-variable">$remote_addr</span>;
}
}
server {
listen 80;
server_name api.hello.world;
location / {
proxy_pass http://l5d.default.svc.cluster.local;
proxy_set_header Host <span class="hljs-variable">$host</span>;
proxy_set_header Connection &quot;</span><span class="hljs-string">&quot;;
proxy_http_version 1.1;
more_clear_input_headers &apos;l5d-ctx-*&apos; &apos;l5d-dtab&apos; &apos;l5d-sample&apos;;
}
}
server {
listen 80;
server_name www.hello.world;
location / {
# allow &apos;employees&apos; to perform dtab overrides
if (<span class="hljs-variable">$cookie_special_employee_cookie</span> != &quot;</span>letmein<span class="hljs-string">&quot;) {
more_clear_input_headers &apos;l5d-ctx-*&apos; &apos;l5d-dtab&apos; &apos;l5d-sample&apos;;
}
# add a dtab override to get people to our beta, world-v2
set <span class="hljs-variable">$xheader</span> &quot;</span><span class="hljs-string">&quot;;
if (<span class="hljs-variable">$cookie_special_employee_cookie</span> ~* &quot;</span>dogfood<span class="hljs-string">&quot;) {
set <span class="hljs-variable">$xheader</span> &quot;</span>/host/world =&gt; /srv/world-v2;<span class="hljs-string">&quot;;
}
proxy_set_header &apos;l5d-dtab&apos; <span class="hljs-variable">$xheader</span>;
proxy_pass http://l5d.default.svc.cluster.local;
proxy_set_header Host <span class="hljs-variable">$host</span>;
proxy_set_header Connection &quot;</span><span class="hljs-string">&quot;;
proxy_http_version 1.1;
}
}
}&quot;</span>
</code></pre>
<p>&#x8F93;&#x51FA;&#x4E2D;&#x5728; <code>nginx.conf</code> &#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x7684;&#x57FA;&#x7840;&#x4E2D;&#x589E;&#x52A0;&#x4E86;&#x6587;&#x4EF6;&#x5934;&#x5185;&#x5BB9;&#xFF0C;&#x662F;kubernetes&#x589E;&#x52A0;&#x7684;&#x3002; </p>
<h2 id="&#x4EE3;&#x7801;">&#x4EE3;&#x7801;</h2>
<p>ConfigMap &#x7ED3;&#x6784;&#x4F53;&#x7684;&#x5B9A;&#x4E49;&#xFF1A;</p>
<pre><code class="lang-go"><span class="hljs-comment">// ConfigMap holds configuration data for pods to consume.</span>
<span class="hljs-keyword">type</span> ConfigMap <span class="hljs-keyword">struct</span> {
metav1.TypeMeta <span class="hljs-string">`json:&quot;,inline&quot;`</span>
<span class="hljs-comment">// Standard object&apos;s metadata.</span>
<span class="hljs-comment">// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata</span>
<span class="hljs-comment">// +optional</span>
metav1.ObjectMeta <span class="hljs-string">`json:&quot;metadata,omitempty&quot; protobuf:&quot;bytes,1,opt,name=metadata&quot;`</span>
<span class="hljs-comment">// Data contains the configuration data.</span>
<span class="hljs-comment">// Each key must be a valid DNS_SUBDOMAIN with an optional leading dot.</span>
<span class="hljs-comment">// +optional</span>
Data <span class="hljs-keyword">map</span>[<span class="hljs-keyword">string</span>]<span class="hljs-keyword">string</span> <span class="hljs-string">`json:&quot;data,omitempty&quot; protobuf:&quot;bytes,2,rep,name=data&quot;`</span>
}
</code></pre>
<p>&#x5728; <code>staging/src/k8s.io/client-go/kubernetes/typed/core/v1/configmap.go</code> &#x4E2D;ConfigMap &#x7684;&#x63A5;&#x53E3;&#x5B9A;&#x4E49;&#xFF1A;</p>
<pre><code class="lang-go"><span class="hljs-comment">// ConfigMapInterface has methods to work with ConfigMap resources.</span>
<span class="hljs-keyword">type</span> ConfigMapInterface <span class="hljs-keyword">interface</span> {
Create(*v1.ConfigMap) (*v1.ConfigMap, error)
Update(*v1.ConfigMap) (*v1.ConfigMap, error)
Delete(name <span class="hljs-keyword">string</span>, options *meta_v1.DeleteOptions) error
DeleteCollection(options *meta_v1.DeleteOptions, listOptions meta_v1.ListOptions) error
Get(name <span class="hljs-keyword">string</span>, options meta_v1.GetOptions) (*v1.ConfigMap, error)
List(opts meta_v1.ListOptions) (*v1.ConfigMapList, error)
Watch(opts meta_v1.ListOptions) (watch.Interface, error)
Patch(name <span class="hljs-keyword">string</span>, pt types.PatchType, data []<span class="hljs-keyword">byte</span>, subresources ...<span class="hljs-keyword">string</span>) (result *v1.ConfigMap, err error)
ConfigMapExpansion
}
</code></pre>
<p>&#x5728; <code>staging/src/k8s.io/client-go/kubernetes/typed/core/v1/configmap.go</code> &#x4E2D;&#x521B;&#x5EFA; ConfigMap &#x7684;&#x65B9;&#x6CD5;&#x5982;&#x4E0B;:</p>
<pre><code class="lang-go"><span class="hljs-comment">// Create takes the representation of a configMap and creates it. Returns the server&apos;s representation of the configMap, and an error, if there is any.</span>
<span class="hljs-keyword">func</span> (c *configMaps) Create(configMap *v1.ConfigMap) (result *v1.ConfigMap, err error) {
result = &amp;v1.ConfigMap{}
err = c.client.Post().
Namespace(c.ns).
Resource(<span class="hljs-string">&quot;configmaps&quot;</span>).
Body(configMap).
Do().
Into(result)
<span class="hljs-keyword">return</span>
}
</code></pre>
<p>&#x901A;&#x8FC7; RESTful &#x8BF7;&#x6C42;&#x5728; etcd &#x4E2D;&#x5B58;&#x50A8; ConfigMap &#x7684;&#x914D;&#x7F6E;&#xFF0C;&#x8BE5;&#x65B9;&#x6CD5;&#x4E2D;&#x8BBE;&#x7F6E;&#x4E86;&#x8D44;&#x6E90;&#x5BF9;&#x8C61;&#x7684; namespace &#x548C; HTTP &#x8BF7;&#x6C42;&#x4E2D;&#x7684; body&#xFF0C;&#x6267;&#x884C;&#x540E;&#x5C06;&#x8BF7;&#x6C42;&#x7ED3;&#x679C;&#x4FDD;&#x5B58;&#x5230; result &#x4E2D;&#x8FD4;&#x56DE;&#x7ED9;&#x8C03;&#x7528;&#x8005;&#x3002;</p>
<p><strong>&#x6CE8;&#x610F; Body &#x7684;&#x7ED3;&#x6784;</strong></p>
<pre><code class="lang-java"><span class="hljs-comment">// Body makes the request use obj as the body. Optional.</span>
<span class="hljs-comment">// If obj is a string, try to read a file of that name.</span>
<span class="hljs-comment">// If obj is a []byte, send it directly.</span>
<span class="hljs-comment">// If obj is an io.Reader, use it directly.</span>
<span class="hljs-comment">// If obj is a runtime.Object, marshal it correctly, and set Content-Type header.</span>
<span class="hljs-comment">// If obj is a runtime.Object and nil, do nothing.</span>
<span class="hljs-comment">// Otherwise, set an error.</span>
</code></pre>
<p>&#x521B;&#x5EFA; ConfigMap RESTful &#x8BF7;&#x6C42;&#x4E2D;&#x7684;&#x7684; Body &#x4E2D;&#x5305;&#x542B; <code>ObjectMeta</code> &#x548C; <code>namespace</code>&#x3002;</p>
<p>HTTP &#x8BF7;&#x6C42;&#x4E2D;&#x7684;&#x7ED3;&#x6784;&#x4F53;&#xFF1A;</p>
<pre><code class="lang-go"><span class="hljs-comment">// Request allows for building up a request to a server in a chained fashion.</span>
<span class="hljs-comment">// Any errors are stored until the end of your call, so you only have to</span>
<span class="hljs-comment">// check once.</span>
<span class="hljs-keyword">type</span> Request <span class="hljs-keyword">struct</span> {
<span class="hljs-comment">// required</span>
client HTTPClient
verb <span class="hljs-keyword">string</span>
baseURL *url.URL
content ContentConfig
serializers Serializers
<span class="hljs-comment">// generic components accessible via method setters</span>
pathPrefix <span class="hljs-keyword">string</span>
subpath <span class="hljs-keyword">string</span>
params url.Values
headers http.Header
<span class="hljs-comment">// structural elements of the request that are part of the Kubernetes API conventions</span>
namespace <span class="hljs-keyword">string</span>
namespaceSet <span class="hljs-keyword">bool</span>
resource <span class="hljs-keyword">string</span>
resourceName <span class="hljs-keyword">string</span>
subresource <span class="hljs-keyword">string</span>
timeout time.Duration
<span class="hljs-comment">// output</span>
err error
body io.Reader
<span class="hljs-comment">// This is only used for per-request timeouts, deadlines, and cancellations.</span>
ctx context.Context
backoffMgr BackoffManager
throttle flowcontrol.RateLimiter
}
</code></pre>
<h2 id="&#x6D4B;&#x8BD5;">&#x6D4B;&#x8BD5;</h2>
<p>&#x5206;&#x522B;&#x6D4B;&#x8BD5;&#x4F7F;&#x7528; ConfigMap &#x6302;&#x8F7D; Env &#x548C; Volume &#x7684;&#x60C5;&#x51B5;&#x3002;</p>
<h3 id="&#x66F4;&#x65B0;&#x4F7F;&#x7528;configmap&#x6302;&#x8F7D;&#x7684;env">&#x66F4;&#x65B0;&#x4F7F;&#x7528;ConfigMap&#x6302;&#x8F7D;&#x7684;Env</h3>
<p>&#x4F7F;&#x7528;&#x4E0B;&#x9762;&#x7684;&#x914D;&#x7F6E;&#x521B;&#x5EFA; nginx &#x5BB9;&#x5668;&#x6D4B;&#x8BD5;&#x66F4;&#x65B0; ConfigMap &#x540E;&#x5BB9;&#x5668;&#x5185;&#x7684;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x662F;&#x5426;&#x4E5F;&#x8DDF;&#x7740;&#x66F4;&#x65B0;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">apiVersion:</span> extensions/v1beta1
<span class="hljs-attr">kind:</span> Deployment
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-nginx
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> replicas:</span> <span class="hljs-number">1</span>
<span class="hljs-attr"> template:</span>
<span class="hljs-attr"> metadata:</span>
<span class="hljs-attr"> labels:</span>
<span class="hljs-attr"> run:</span> my-nginx
<span class="hljs-attr"> spec:</span>
<span class="hljs-attr"> containers:</span>
<span class="hljs-attr"> - name:</span> my-nginx
<span class="hljs-attr"> image:</span> sz-pg-oam-docker-hub<span class="hljs-bullet">-001.</span>tendcloud.com/library/nginx:<span class="hljs-number">1.9</span>
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - containerPort:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> envFrom:</span>
<span class="hljs-attr"> - configMapRef:</span>
<span class="hljs-attr"> name:</span> env-config
<span class="hljs-meta">---</span>
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">kind:</span> ConfigMap
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> env-config
<span class="hljs-attr"> namespace:</span> default
<span class="hljs-attr">data:</span>
<span class="hljs-attr"> log_level:</span> INFO
</code></pre>
<p>&#x83B7;&#x53D6;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x7684;&#x503C;</p>
<pre><code class="lang-bash">$ kubectl <span class="hljs-built_in">exec</span> `kubectl get pods <span class="hljs-_">-l</span> run=my-nginx -o=name|cut <span class="hljs-_">-d</span> <span class="hljs-string">&quot;/&quot;</span> <span class="hljs-_">-f</span>2` env|grep <span class="hljs-built_in">log</span>_level
<span class="hljs-built_in">log</span>_level=INFO
</code></pre>
<p>&#x4FEE;&#x6539; ConfigMap</p>
<pre><code class="lang-bash">$ kubectl edit configmap env-config
</code></pre>
<p>&#x4FEE;&#x6539; <code>log_level</code> &#x7684;&#x503C;&#x4E3A; <code>DEBUG</code>&#x3002;</p>
<p>&#x518D;&#x6B21;&#x67E5;&#x770B;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x3002;</p>
<pre><code class="lang-bash">$ kubectl <span class="hljs-built_in">exec</span> `kubectl get pods <span class="hljs-_">-l</span> run=my-nginx -o=name|cut <span class="hljs-_">-d</span> <span class="hljs-string">&quot;/&quot;</span> <span class="hljs-_">-f</span>2` env|grep <span class="hljs-built_in">log</span>_level
<span class="hljs-built_in">log</span>_level=INFO
</code></pre>
<p>&#x5B9E;&#x8DF5;&#x8BC1;&#x660E;&#x4FEE;&#x6539; ConfigMap &#x65E0;&#x6CD5;&#x66F4;&#x65B0;&#x5BB9;&#x5668;&#x4E2D;&#x5DF2;&#x6CE8;&#x5165;&#x7684;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x4FE1;&#x606F;&#x3002;</p>
<h3 id="&#x66F4;&#x65B0;&#x4F7F;&#x7528;configmap&#x6302;&#x8F7D;&#x7684;volume">&#x66F4;&#x65B0;&#x4F7F;&#x7528;ConfigMap&#x6302;&#x8F7D;&#x7684;Volume</h3>
<p>&#x4F7F;&#x7528;&#x4E0B;&#x9762;&#x7684;&#x914D;&#x7F6E;&#x521B;&#x5EFA; nginx &#x5BB9;&#x5668;&#x6D4B;&#x8BD5;&#x66F4;&#x65B0; ConfigMap &#x540E;&#x5BB9;&#x5668;&#x5185;&#x6302;&#x8F7D;&#x7684;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x4E5F;&#x8DDF;&#x7740;&#x66F4;&#x65B0;&#x3002;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">apiVersion:</span> extensions/v1beta1
<span class="hljs-attr">kind:</span> Deployment
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> my-nginx
<span class="hljs-attr">spec:</span>
<span class="hljs-attr"> replicas:</span> <span class="hljs-number">1</span>
<span class="hljs-attr"> template:</span>
<span class="hljs-attr"> metadata:</span>
<span class="hljs-attr"> labels:</span>
<span class="hljs-attr"> run:</span> my-nginx
<span class="hljs-attr"> spec:</span>
<span class="hljs-attr"> containers:</span>
<span class="hljs-attr"> - name:</span> my-nginx
<span class="hljs-attr"> image:</span> sz-pg-oam-docker-hub<span class="hljs-bullet">-001.</span>tendcloud.com/library/nginx:<span class="hljs-number">1.9</span>
<span class="hljs-attr"> ports:</span>
<span class="hljs-attr"> - containerPort:</span> <span class="hljs-number">80</span>
<span class="hljs-attr"> volumeMounts:</span>
<span class="hljs-attr"> - name:</span> config-volume
<span class="hljs-attr"> mountPath:</span> /etc/config
<span class="hljs-attr"> volumes:</span>
<span class="hljs-attr"> - name:</span> config-volume
<span class="hljs-attr"> configMap:</span>
<span class="hljs-attr"> name:</span> special-config
<span class="hljs-meta">---</span>
<span class="hljs-attr">apiVersion:</span> v1
<span class="hljs-attr">kind:</span> ConfigMap
<span class="hljs-attr">metadata:</span>
<span class="hljs-attr"> name:</span> special-config
<span class="hljs-attr"> namespace:</span> default
<span class="hljs-attr">data:</span>
<span class="hljs-attr"> log_level:</span> INFO
</code></pre>
<pre><code class="lang-bash">$ kubectl <span class="hljs-built_in">exec</span> `kubectl get pods <span class="hljs-_">-l</span> run=my-nginx -o=name|cut <span class="hljs-_">-d</span> <span class="hljs-string">&quot;/&quot;</span> <span class="hljs-_">-f</span>2` cat /tmp/<span class="hljs-built_in">log</span>_level
INFO
</code></pre>
<p>&#x4FEE;&#x6539; ConfigMap</p>
<pre><code class="lang-bash">$ kubectl edit configmap special-config
</code></pre>
<p>&#x4FEE;&#x6539; <code>log_level</code> &#x7684;&#x503C;&#x4E3A; <code>DEBUG</code>&#x3002;</p>
<p>&#x7B49;&#x5F85;&#x5927;&#x6982;10&#x79D2;&#x949F;&#x65F6;&#x95F4;&#xFF0C;&#x518D;&#x6B21;&#x67E5;&#x770B;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x3002;</p>
<pre><code class="lang-bash">$ kubectl <span class="hljs-built_in">exec</span> `kubectl get pods <span class="hljs-_">-l</span> run=my-nginx -o=name|cut <span class="hljs-_">-d</span> <span class="hljs-string">&quot;/&quot;</span> <span class="hljs-_">-f</span>2` cat /tmp/<span class="hljs-built_in">log</span>_level
DEBUG
</code></pre>
<p>&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#x4F7F;&#x7528; ConfigMap &#x65B9;&#x5F0F;&#x6302;&#x8F7D;&#x7684; Volume &#x7684;&#x6587;&#x4EF6;&#x4E2D;&#x7684;&#x5185;&#x5BB9;&#x5DF2;&#x7ECF;&#x53D8;&#x6210;&#x4E86; <code>DEBUG</code>&#x3002;</p>
<h2 id="&#x603B;&#x7ED3;">&#x603B;&#x7ED3;</h2>
<p>&#x66F4;&#x65B0; ConfigMap &#x540E;&#xFF1A;</p>
<ul>
<li>&#x4F7F;&#x7528;&#x8BE5; ConfigMap &#x6302;&#x8F7D;&#x7684; Env <strong>&#x4E0D;&#x4F1A;</strong>&#x540C;&#x6B65;&#x66F4;&#x65B0;</li>
<li>&#x4F7F;&#x7528;&#x8BE5; ConfigMap &#x6302;&#x8F7D;&#x7684; Volume &#x4E2D;&#x7684;&#x6570;&#x636E;&#x9700;&#x8981;&#x4E00;&#x6BB5;&#x65F6;&#x95F4;&#xFF08;&#x5B9E;&#x6D4B;&#x5927;&#x6982;10&#x79D2;&#xFF09;&#x624D;&#x80FD;&#x540C;&#x6B65;&#x66F4;&#x65B0;</li>
</ul>
<p>ENV &#x662F;&#x5728;&#x5BB9;&#x5668;&#x542F;&#x52A8;&#x7684;&#x65F6;&#x5019;&#x6CE8;&#x5165;&#x7684;&#xFF0C;&#x542F;&#x52A8;&#x4E4B;&#x540E; kubernetes &#x5C31;&#x4E0D;&#x4F1A;&#x518D;&#x6539;&#x53D8;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x7684;&#x503C;&#xFF0C;&#x4E14;&#x540C;&#x4E00;&#x4E2A; namespace &#x4E2D;&#x7684; pod &#x7684;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x662F;&#x4E0D;&#x65AD;&#x7D2F;&#x52A0;&#x7684;&#xFF0C;&#x53C2;&#x8003; <a href="https://jimmysong.io/posts/exploring-kubernetes-env-with-docker/" target="_blank">Kubernetes&#x4E2D;&#x7684;&#x670D;&#x52A1;&#x53D1;&#x73B0;&#x4E0E;docker&#x5BB9;&#x5668;&#x95F4;&#x7684;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x4F20;&#x9012;&#x6E90;&#x7801;&#x63A2;&#x7A76;</a>&#x3002;&#x4E3A;&#x4E86;&#x66F4;&#x65B0;&#x5BB9;&#x5668;&#x4E2D;&#x4F7F;&#x7528; ConfigMap &#x6302;&#x8F7D;&#x7684;&#x914D;&#x7F6E;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x6EDA;&#x52A8;&#x66F4;&#x65B0; pod &#x7684;&#x65B9;&#x5F0F;&#x6765;&#x5F3A;&#x5236;&#x91CD;&#x65B0;&#x6302;&#x8F7D; ConfigMap&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x5728;&#x66F4;&#x65B0;&#x4E86; ConfigMap &#x540E;&#xFF0C;&#x5148;&#x5C06;&#x526F;&#x672C;&#x6570;&#x8BBE;&#x7F6E;&#x4E3A; 0&#xFF0C;&#x7136;&#x540E;&#x518D;&#x6269;&#x5BB9;&#x3002;</p>
<h2 id="&#x53C2;&#x8003;">&#x53C2;&#x8003;</h2>
<ul>
<li><a href="https://acotten.com/post/kube17-security" target="_blank">Kubernetes 1.7 security in practice</a></li>
<li><a href="https://jimmysong.io/kubernetes-handbook/concepts/configmap.html" target="_blank">ConfigMap | kubernetes handbook - jimmysong.io</a></li>
<li><a href="https://jimmysong.io/kubernetes-handbook/practice/etcd-cluster-installation.html" target="_blank">&#x521B;&#x5EFA;&#x9AD8;&#x53EF;&#x7528;ectd&#x96C6;&#x7FA4; | Kubernetes handbook - jimmysong.io</a></li>
<li><a href="https://jimmysong.io/posts/exploring-kubernetes-env-with-docker/" target="_blank">Kubernetes&#x4E2D;&#x7684;&#x670D;&#x52A1;&#x53D1;&#x73B0;&#x4E0E;docker&#x5BB9;&#x5668;&#x95F4;&#x7684;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#x4F20;&#x9012;&#x6E90;&#x7801;&#x63A2;&#x7A76;</a> </li>
</ul>
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_CAPTION_","label":"API文档","attributes":{},"skip":false,"key":"1.2.7"},{"backlink":"cloud-native/kubernetes-and-cloud-native-app-overview.html#fig1.2.8","level":"1.2","list_caption":"Figure: 迁移步骤示意图","alt":"迁移步骤示意图","nro":8,"url":"../images/migrating-hadoop-yarn-to-kubernetes.png","index":8,"caption_template":"图片 - _CAPTION_","label":"迁移步骤示意图","attributes":{},"skip":false,"key":"1.2.8"},{"backlink":"cloud-native/kubernetes-and-cloud-native-app-overview.html#fig1.2.9","level":"1.2","list_caption":"Figure: service mesh架构图","alt":"service mesh架构图","nro":9,"url":"../images/serivce-mesh-control-plane.png","index":9,"caption_template":"图片 - _CAPTION_","label":"service mesh架构图","attributes":{},"skip":false,"key":"1.2.9"},{"backlink":"cloud-native/kubernetes-and-cloud-native-app-overview.html#fig1.2.10","level":"1.2","list_caption":"Figure: kibana界面","alt":"kibana界面","nro":10,"url":"../images/filebeat-docker-test.jpg","index":10,"caption_template":"图片 - _CAPTION_","label":"kibana界面","attributes":{},"skip":false,"key":"1.2.10"},{"backlink":"cloud-native/kubernetes-and-cloud-native-app-overview.html#fig1.2.11","level":"1.2","list_caption":"Figure: Grafana界面示意图1","alt":"Grafana界面示意图1","nro":11,"url":"../images/kubernetes-devops-example-grafana-1.png","index":11,"caption_template":"图片 - 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