centos安装jenkins

首先拉取源（http://pkg.jenkins-ci.org/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

　然后就可以直接通过yum install -y jenkins安装了