jenkens安装

安装教程：https://pkg.jenkins.io/redhat-stable/

  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

  yum install fontconfig java-11-openjdk
  yum install jenkins

centos7默认安装jdk8:需要卸载。
配置镜像：

vim /var/lib/jenkins/hudson.model.UpdateCenter.xml

<?xml version='1.1' encoding='UTF-8'?>
<sites>
  <site>
    <id>default</id>
    <url>https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json</url>
  </site>
</sites>