Add Docs: Customize Jenkins Agent (#2225)

* Add Docs: Customize Jenkins Agent

Signed-off-by: Felixnoo <felixliu@kubesphere.io>

* resolve comments

Signed-off-by: Felixnoo <felixliu@kubesphere.io>

* minor updates

Signed-off-by: Felixnoo <felixliu@kubesphere.io>

content/en/docs/devops-user-guide/examples/customize-jenkins-agent.md

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+---
+title: "Customize Jenkins Agent"
+keywords: "KubeSphere, Kubernetes, DevOps, Jenkins, Agent"
+description: "Learn how to customize a Jenkins agent on KubeSphere."
+linkTitle: "Customize Jenkins Agent"
+Weight: 11460
+---
+
+If you need to use a Jenkins agent that runs on a specific environment, for example, JDK 11, you can customize a Jenkins agent on KubeSphere.
+
+This document describes how to customize a Jenkins agent on KubeSphere. 
+
+## Prerequisites
+
+- You have enabled [the KubeSphere DevOps System](../../../pluggable-components/devops/).
+
+## Customize a Jenkins agent
+
+1. Log in to the web console of KubeSphere as `admin`.
+
+2. Click **Platform** in the upper-left corner, select **Cluster Management**, and click **Configmaps** under **Configuration** on the left navigation pane.
+
+3. On the **Configmaps** page, enter `jenkins-casc-config` in the search box and press **Enter**.
+
+4. Click `jenkins-casc-config` to go to its details page, click **More**, and select **Edit YAML**.
+
+5. In the displayed dialog box, enter the following code under the `data.jenkins_user.yaml:jenkins.clouds.kubernetes.templates` section and click **OK**.
+
+   ```yaml
+   - name: "maven-jdk11" # The name of the customized Jenkins agent.
+     label: "maven jdk11" # The label of the customized Jenkins agent. To specify multiple labels, use spaces to seperate them. 
+     inheritFrom: "maven" # The name of the existing pod template from which this customzied Jenkins agent inherits.
+     containers:
+     - name: "maven" # The container name specified in the existing pod template from which this customzied Jenkins agent inherits.
+       image: "kubespheredev/builder-maven:v3.2.0jdk11" # This image is used for testing purposes only. You can use your own images.
+   ```
+
+   {{< notice note >}}
+
+   Make sure you follow the indentation in the YAML file.
+
+   {{</ notice >}}
+
+6. Wait for at least 70 seconds until your changes are automatically reloaded.
+
+7. To use the custom Jenkins agent, refer to the following sample Jenkinsfile to specify the label and container name of the custom Jenkins agent accordingly when creating a pipeline.
+
+   ```groovy
+   pipeline {
+     agent {
+       node {
+         label 'maven && jdk11'
+       }
+     }
+     stages {
+       stage('Print Maven and JDK version') {
+         steps {
+           container('maven') {
+             sh '''
+             mvn -v
+             java -version
+             '''
+           }
+         }
+       }
+     }
+   }
+   ```
+
+   

content/zh/docs/devops-user-guide/examples/customize-jenkins-agent.md

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+---
+title: "自定义 Jenkins Agent"
+keywords: "KubeSphere, Kubernetes, DevOps, Jenkins, Agent"
+description: "了解如何在 KubeSphere 上自定义 Jenkins Agent。"
+linkTitle: "自定义 Jenkins Agent"
+Weight: 11460
+---
+
+如果您需要使用运行特定环境（例如 JDK 11）的 Jenkins Agent，您可以在 KubeSphere 上自定义 Jenkins Agent。
+
+本文档描述如何在 KubeSphere 上自定义 Jenkins Agent。
+
+## 准备工作
+
+- 您需要启用 [KubeSphere DevOps 系统](../../../pluggable-components/devops/)。
+
+## 自定义 Jenkins Agent
+
+1. 以 `admin` 用户登录 KubeSphere Web 控制台。
+
+2. 点击左上角的**平台管理**，选择**集群管理**，然后在左侧导航栏点击**配置**下的**配置字典**。
+
+3. 在**配置字典**页面的搜索框中输入 `jenkins-casc-config` 并按**回车键**。
+
+4. 点击 `jenkins-casc-config` 进入其详情页面，点击**更多操作**，选择**编辑 YAML**。
+
+5. 在弹出的对话框中，搜寻至 `data.jenkins_user.yaml:jenkins.clouds.kubernetes.templates` 下方并输入以下代码，点击**确定**。
+
+   ```yaml
+   - name: "maven-jdk11" # 自定义 Jenkins Agent 的名称。
+     label: "maven jdk11" # 自定义 Jenkins Agent 的标签。若要指定多个标签，请用空格来分隔标签。
+     inheritFrom: "maven" # 该自定义 Jenkins Agent 所继承的现有容器组模板的名称。
+     containers:
+     - name: "maven" # 该自定义 Jenkins Agent 所继承的现有容器组模板中指定的容器名称。
+       image: "kubespheredev/builder-maven:v3.2.0jdk11" # 此镜像只用于测试。您可以使用自己的镜像。
+   ```
+
+   {{< notice note >}}
+
+   请确保遵守 YAML 文件中的缩进。
+
+   {{</ notice >}}
+
+6. 请至少等待 70 秒，您的改动会自动重新加载。
+
+7. 要使用自定义 Jenkins Agent，请参考下方的示例 Jenkinsfile，在创建流水线时指定自定义 Jenkins Agent 对应的标签和容器名。
+
+   ```groovy
+   pipeline {
+     agent {
+       node {
+         label 'maven && jdk11'
+       }
+     }
+     stages {
+       stage('Print Maven and JDK version') {
+         steps {
+           container('maven') {
+             sh '''
+             mvn -v
+             java -version
+             '''
+           }
+         }
+       }
+     }
+   }
+   ```
+
+