准备条件：安装Java（CentOS下安装Java1.8）

1、Yum安装

yum源导入

#添加Yum源
sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

#导入密钥
sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

安装

sudo yum install -y jenkins

2、开放端口

Jenkins站点的默认监听端口是8080(防火墙安装看这)

sudo firewall-cmd --add-port=8080/tcp --permanent
sudo firewall-cmd --reload

3、安装完成后启动Jenkins：

  • 检查Jenkins服务状态
    sudo systemctl status jenkins
  • 设置为开机自启动
    sudo systemctl enable jenkins
  • 启动Jenkins服务
    sudo systemctl start jenkins
  • 停止Jenkins服务
    sudo service jenkins stop

（查看Jenkins开启成功「Active：active （running）」，就可以在浏览器里面查看：http://服务器IP:Jenkins启动的端口号Port）## 4、相关配置
Jenkins配置文件地址：

/etc/sysconfig/jenkins

这就是Jenkins的配置文件，可以在这里查看Jenkins默认的配置。
cat jenkins
这里介绍下三个比较重要的配置：

JENKINS_HOME

JENKINS_USER

JENKINS_PORT
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。

## Path:        Development/Jenkins
## Description: Jenkins Continuous Integration Server
## Type:        string
## Default:     "/var/lib/jenkins"
## ServiceRestart: jenkins
#
# Directory where Jenkins store its configuration and working
# files (checkouts, build reports, artifacts, ...).
#
JENKINS_HOME="/var/lib/jenkins"

JENKINS_USER 是Jenkins的用户，拥有$JENKINS_HOME和/var/log/jenkins的权限。

## Type:        string
## Default:     "jenkins"
## ServiceRestart: jenkins
#
# Unix user account that runs the Jenkins daemon
# Be careful when you change this, as you need to update
# permissions of $JENKINS_HOME and /var/log/jenkins.
#
JENKINS_USER="jenkins"

JENKINS_PORT 是Jenkins的端口，默认端口是8080。

Default: 8080

ServiceRestart: jenkins

Port Jenkins is listening on.

Set to -1 to disable

JENKINS_PORT=”8080”

## Type:        integer(0:65535)  
## Default:     8080
## ServiceRestart: jenkins
#
# Port Jenkins is listening on.
# Set to -1 to disable
#
JENKINS_PORT="8080"