第 1 章 OpenShift CLI (oc)

• 直接使用项目源代码。
• 使用脚本进行 OpenShift Container Platform 的相关操作。
• 受带宽资源限制，无法使用 Web 控制台。

先决条件

• 有访问 OpenShift Container Platform 集群的权限。
• 已安装CLI。

流程

• 使用oc login命令登录到 CLI，根据提示输入所需信息。

  $ oc login
  Server [https://localhost:8443]: https://openshift.example.com:6443 

  1

  
  The server uses a certificate signed by an unknown authority.
  You can bypass the certificate check, but any data you send to the server could be intercepted by others.
  Use insecure connections? (y/n): y 

  2

  
  
  Authentication required for https://openshift.example.com:6443 (openshift)
  Username: user1 

  3

  
  Password: 

  4

  
  Login successful.
  
  You don't have any projects. You can try to create a new project, by running
  
      oc new-project <projectname>
  
  Welcome! See 'oc help' to get started.

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  1

  输入 OpenShift Container Platform 服务器的 URL。

  2

  输入是否使用不安全的连接。

  3

  输入要登录的用户名。

  4

  输入用户密码。

• 使用oc help获取所有可用 CLI 命令的列表和描述：

  示例：获取 CLI 的常规帮助信息

  $ oc help
  OpenShift Client
  
  This client helps you develop, build, deploy, and run your applications on any OpenShift or Kubernetes compatible
  platform. It also includes the administrative commands for managing a cluster under the 'adm' subcommand.
  
  Usage:
    oc [flags]
  
  Basic Commands:
    login           Log in to a server
    new-project     Request a new project
    new-app         Create a new application
  
  ...

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• 使用--help标志获取有关特定CLI命令的帮助信息：

  示例：获取oc create命令的帮助信息

  $ oc create --help
  Create a resource by filename or stdin
  
  JSON and YAML formats are accepted.
  
  Usage:
    oc create -f FILENAME [flags]
  
  ...

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• 使用oc explain命令查看特定资源的描述信息和项信息：

  示例：查看Pod资源的文档

  $ oc explain pods
  KIND:     Pod
  VERSION:  v1
  
  DESCRIPTION:
       Pod is a collection of containers that can run on a host. This resource is
       created by clients and scheduled onto hosts.
  
  FIELDS:
     apiVersion	<string>
       APIVersion defines the versioned schema of this representation of an
       object. Servers should convert recognized schemas to the latest internal
       value, and may reject unrecognized values. More info:
       https://git.k8s.io/community/contributors/devel/api-conventions.md#resources
  
  ...

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• 使用oc logout命令。

  $ oc logout
  Logged "user1" out on "https://openshift.example.com"

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