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J**enkins是开源的,使用Java编写的持续集成的工具,在Centos上可以通过yum命令行直接安装。记录下安装的过程,方便以后查找。**
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## 安装 java
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## $ sudo yum** **install** **-y** **java**==**==......
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## 安装Jenkins
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## $ sudo wget -O /etc/yum.repos.d/jenkins.repo** **http:**==//jenkins-ci.org/redhat/jenkins.repo********$ sudo rpm --****import** **http:****//pkg.jenkins-ci.org/redhat/jenkins-ci.org.key********$ sudo yum install -y jenkins******==......
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# CentOS 安装 Jenkins
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> Jenkins 持续集成服务部署
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---
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## 前提条件
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安装 Java(Jenkins 需要 Java 环境):
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```bash
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sudo yum install -y java-11-openjdk java-11-openjdk-devel
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```
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验证:
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```bash
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java -version
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```
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---
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## 安装 Jenkins
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### 1. 添加 Jenkins 源
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```bash
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sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo
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```
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### 2. 导入密钥
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```bash
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sudo rpm --import https://pkg.jenkins-ci.org/redhat/jenkins-ci.org.key
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```
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### 3. 安装 Jenkins
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```bash
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sudo yum install -y jenkins
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```
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---
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## 配置
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## Jenkins 的安装目录是:/var/lib/jenkins/
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## Jenkins 的皮遏制文件地址:/etc/sysconfig/jenkins
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## 这里介绍下三个比较重要的配置:
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## JENKINS_HOME
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## JENKINS_USER
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## JENKINS_PORT
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## JENKINS_HOME是Jenkins的主目录,Jenkins工作的目录都放在这里,Jenkins储存文件的地址,Jenkins的插件,生成的文件都在这个目录下。
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## JENKINS_USER是Jenkins的用户,拥有$JENKINS_HOME和/var/log/jenkins的权限。
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## JENKINS_PORT是Jenkins的端口,默认端口是8080,为了和别的系统占用端口冲突,建议改变。
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### 重要目录
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| 路径 | 说明 |
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|------|------|
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| `/var/lib/jenkins/` | Jenkins 主目录 |
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| `/etc/sysconfig/jenkins` | 配置文件 |
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| `/var/log/jenkins/` | 日志目录 |
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### 关键配置项
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```bash
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sudo vim /etc/sysconfig/jenkins
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```
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```ini
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JENKINS_HOME="/var/lib/jenkins" # 主目录
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JENKINS_USER="jenkins" # 运行用户
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JENKINS_PORT="8080" # 默认端口
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```
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---
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## 授权
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## 有时候Jenkins需要操作别的用户的文件或者执行脚本,那么就得有对应的权限,比如Jenkins用户执行docker命令进行镜像制作与上传,用如下的命令即可。
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## $ sudo usermod -a -G docker jenkins
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让 Jenkins 用户有权限执行相关操作:
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```bash
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# 添加到 docker 组(如果需要操作 Docker)
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sudo usermod -a -G docker jenkins
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# 设置目录权限
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sudo chown -R jenkins:jenkins /var/lib/jenkins
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sudo chown -R jenkins:jenkins /var/log/jenkins
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```
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---
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## 启动 Jenkins
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$ systemctl enable jenkins # 开机启动$ systemctl start jenkins # 启动jenkins
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```bash
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# 开机自启
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sudo systemctl enable jenkins
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# 启动
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sudo systemctl start jenkins
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# 查看状态
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sudo systemctl status jenkins
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# 重启
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sudo systemctl restart jenkins
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```
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---
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## 访问 Jenkins
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1. 浏览器打开:`http://服务器IP:8080`
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2. 首次访问需要解锁:
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```bash
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# 查看初始管理员密码
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sudo cat /var/lib/jenkins/secrets/initialAdminPassword
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```
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3. 按提示完成安装向导
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---
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## 常用命令
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```bash
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# 启动/停止/重启
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sudo systemctl start jenkins
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sudo systemctl stop jenkins
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sudo systemctl restart jenkins
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# 查看密码
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sudo cat /var/lib/jenkins/secrets/initialAdminPassword
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# 卸载
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sudo yum remove jenkins
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sudo rm -rf /var/lib/jenkins
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sudo rm -rf /var/log/jenkins
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```
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---
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## 常见问题
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### 端口被占用
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修改端口:
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```bash
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sudo vim /etc/sysconfig/jenkins
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# 修改 JENKINS_PORT="8080" 为其他端口
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sudo systemctl restart jenkins
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```
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### 权限问题
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```bash
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sudo chown -R jenkins:jenkins /var/lib/jenkins
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sudo chmod -R 755 /var/lib/jenkins
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```
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