一、CentOS 7.9 安装 Jenkins 2.361.2

1 下载地址：https://www.jenkins.io/download

2 简介

二、Jenkins Redhat Packages

To use this repository, run the following command:

sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

If you've previously imported the key from Jenkins, the rpm --import will fail because you already have a key. Please ignore that and move on.

yum install fontconfig java-11-openjdk
yum install jenkins

The rpm packages were signed using this key:

pub   rsa4096 2020-03-30 [SC] [expires: 2023-03-30]
      62A9756BFD780C377CF24BA8FCEF32E745F2C3D5
uid                      Jenkins Project <jenkinsci-board@googlegroups.com>
sub   rsa4096 2020-03-30 [E] [expires: 2023-03-30]</jenkinsci-board@googlegroups.com>

You will need to explicitly install a supported Java runtime environment (JRE), either from your distribution (as described above) or another Java vendor (e.g., Adoptium).

三、启动

# 启动Jenkins
systemctl start jenkins
# 设置开机启动
systemctl enable jenkins
# 查看Jenkins状态
systemctl status jenkins

在浏览器打开Jenkins控制面板  http://IP:8080/

如果一直浏览器一直是这个界面，就需要修改一下Jenkins的配置文件，然后重启Jenkins，然后等待浏览器出现输入密码的界面表示Jenkins启动成功

vim /var/lib/jenkins/hudson.model.UpdateCenter.xml
systemctl restart jenkins
# https://updates.jenkins.io/update-center.json
# https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json

如果不记得密码，可以通过以下命令找回

cat /var/lib/jenkins/secrets/initialAdminPassword

四、配置Jenkins

进入jenkins配置文件

vim /etc/sysconfig/jenkins
JENKINS_HOME="/var/lib/jenkins"    # jenkins的工作路径
JENKINS_JAVA_CMD=""
JENKINS_USER="jenkins"     

查看系统8080端口是否被占用

netstat -nlt |grep 8080

五、防火墙开启8080端口

# 关闭防火墙
systemctl stop firewalld

# 开放3306端口命令
firewall-cmd --zone=public --add-port=8080/tcp --permanent
# 配置立即生效
firewall-cmd --reload

云主机需配置安全组

在入方向规则，允许8080放行

六、服务卸载

# 卸载jenkins服务
rpm -e jenkins
# 检查是否卸载成功
rpm -ql jenkins
# 彻底删除残留文件
find / -name jenkins | xargs rm -rf