Jenkins连接Git仓库时候报错Permission denied, please try again.

一、连接GIT仓库报错

Failed to connect to repository : Command "git ls-remote -h git@192.168.5.71:/home/git/www.git HEAD" returned status code :
stdout:
stderr: Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

二、问题原因

我是通过yum安装的Jenkins，安装过程中创建了jenkins用户，并作为service以这个用户来运行。所以无论是root还是当前用户的ssh key都是不生效的。

# ps aux | grep jenkins
jenkins    13.4 15.2   ?      Ssl  Nov18 : /etc/alternatives/java -Djava.awt.headless=true -DJENKINS_HOME=/var/lib/jenkins -jar /usr/lib/jenkins/jenkins.war --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --httpPort= --debug= --handlerCountMax= --handlerCountMaxIdle=

三、解决方法

最简单的方法是把服务用户由jenkins修改为root

# sed -n '29p' /etc/sysconfig/jenkins
JENKINS_USER="root"
# systemctl restart jenkins.service
# ps aux | grep jenkins
root         5.8   ?      Ssl  :   : /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -Djava.awt.headless=true -DJENKINS_HOME=/var/lib/jenkins -jar /usr/lib/jenkins/jenkins.war --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --daemon --httpPort= --debug= --handlerCountMax= --handlerCountMaxIdle=

另一种就是为jenkins这个用户再生成ssh key，然后设置到git系统