1. 安装jenkins仓库

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

@ 安装jenkins

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yum install -y jenkins

2. 配置文件

配置文件要修改/usr/lib/systemd/system/jenkins.service，之前的/etc/sysconfig/jenkins无效

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#好像没啥用了，被下面的替代
vim /etc/sysconfig/jenkins
#----------------------------------------------
#监听端口
JENKINS_PORT="6700"
#为了不因为权限出现各种问题，修改用户为root
JENKINS_USER="root"
#----------------------------------------------


vim /usr/lib/systemd/system/jenkins.service
#-----------------------------------------------
Environment="JENKINS_PORT=6700"
#-----------------------------------------------


systemctl daemon-reload

3. 修改目录权限

其实可以不修改，就以jenkins用户运行

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chown -R root:root /var/lib/jenkins
chown -R root:root /var/cache/jenkins
chown -R root:root /var/log/jenkins

4. 启动停止

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#启动
sudo service jenkins start     
#或者
systemctl start jenkins
# 或者  有时只有这个能启动成功，上面两个不能(可能是jdk版本问题)
./etc/init.d/jenkins start
#停止
sudo service jenkins stop 
#重启
sudo service jenkins restart

若启动报错，则添加 java 环境路径

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ln -s /opt/jdk1.8.0_333/bin/java /usr/bin/java



# 等同于修改Java配置加上jdk路径
vim /etc/init.d/jenkins
#----------------------------------------------
candidates="
/etc/alternatives/java
/usr/lib/jvm/java-1.8.0/bin/java
/usr/lib/jvm/jre-1.8.0/bin/java
/usr/lib/jvm/java-11.0/bin/java
/usr/lib/jvm/jre-11.0/bin/java
/usr/lib/jvm/java-11-openjdk-amd64
/usr/bin/java 
#----------------------------------------------

若没有权限jenkins is not in the sudoers file. This incident will be reported.，则

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su root
vi sudo
找到"root ALL=(ALL)ALL"
在下面增加"‘用户名’ ALL=(ALL)ALL"

5. 默认密码

默认密码在这里，可以修改

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view /var/lib/jenkins/secrets/initialAdminPassword