Update kubernetes
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主节点上需要提供如下的管理服务:
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* `apiserver` 是整个系统的对外接口,提供一套 RESTful 的 [Kubernetes API](https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/api.md),供客户端和其它组件调用;
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* `apiserver` 是整个系统的对外接口,提供一套 RESTful 的 [Kubernetes API](https://github.com/kubernetes/kubernetes/tree/master/docs/api-reference),供客户端和其它组件调用;
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* `scheduler` 负责对资源进行调度,分配某个 pod 到某个节点上。是 pluggable 的,意味着很容易选择其它实现方式;
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* `controller-manager` 负责管理控制器,包括 endpoint-controller(刷新服务和 pod 的关联信息)和 replication-controller(维护某个 pod 的复制为配置的数值)。
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# kubectl 使用
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[kubectl](https://github.com/GoogleCloudPlatform/kubernetes) 是 Kubernetes 自带的客户端,可以用它来直接操作 Kubernetes。
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[kubectl](https://github.com/kubernetes/kubernetes) 是 Kubernetes 自带的客户端,可以用它来直接操作 Kubernetes。
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使用格式有两种:
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```bash
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```
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## get
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Display one or many resources
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显示一个或多个资源
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## describe
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Show details of a specific resource
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显示资源详情
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## create
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Create a resource by filename or stdin
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从文件或标准输入创建资源
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## update
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Update a resource by filename or stdin.
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从文件或标准输入更新资源
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## delete
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Delete a resource by filename, stdin, resource and ID, or by resources and label selector.
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## namespace
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SUPERCEDED: Set and view the current Kubernetes namespace
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通过文件名、标准输入、资源名或者 label selector 删除资源
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## log
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Print the logs for a container in a pod.
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输出 pod 中一个容器的日志。
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## rolling-update
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Perform a rolling update of the given ReplicationController.
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## resize
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Set a new size for a Replication Controller.
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对指定的 replication controller 执行滚动升级
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## exec
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Execute a command in a container.
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在容器内部执行命令
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## port-forward
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Forward one or more local ports to a pod.
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将本地端口转发到Pod
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## proxy
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Run a proxy to the Kubernetes API server
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## run-container
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Run a particular image on the cluster.
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## stop
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Gracefully shut down a resource by id or filename.
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为 Kubernetes API server 启动代理服务器
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## run
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在集群中使用指定镜像启动容器
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## expose
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Take a replicated application and expose it as Kubernetes Service
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将 replication controller service 或 pod 暴露为新的 kubernetes service
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## label
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Update the labels on a resource
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更新资源的 label
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## config
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config modifies kubeconfig files
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修改 kubernetes 配置文件
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## cluster-info
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Display cluster info
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显示集群信息
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## api-versions
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Print available API versions.
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以 "组/版本" 的格式输出服务端支持的 API 版本
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## version
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Print the client and server version information.
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输出服务端和客户端的版本信息
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## help
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Help about any command
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显示各个命令的帮助信息
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