jenkins 执行 ssh 命令报错Permission denied (publickey).

原文地址

WHAT

jenkins执行带有ssh命令的任务,报错“Permission denied (publickey).”;

WHY

手动迁移几个jenkins任务,结果有几个任务命令中带ssh,一直报错;

HOW

现象

  • 两个不同环境的服务器小A和小B,都启动了jenkins服务,上面有一个同样的任务是“ssh登录到服务器小C上执行一个命令”;
  • 原本在小A的jenkins上的任务可以正常执行;
  • 但是小B上的任务一直报Permission denied (publickey).
  • 确认了下小A和小B的~/.ssh/id_rsa.pub都是一样的;
  • 同时在小B服务器上直接ssh root@小C "echo 'hello world'"也是ok的
  • google关键字“jenkins ssh Permission denied (publickey).”找到了这个问题中的这句话“I would suggest to use the -v argument to compare the 2 outputs:

  • 于是将原本的命令ssh root@小C "echo 'hello world'"改成ssh -v root@小C "echo 'hello world',将ssh的详细信息打印出来
  • 最后几行输出为
	debug1: Next authentication method: publickey
	debug1: Trying private key: /var/lib/jenkins/.ssh/id_rsa
	debug1: Trying private key: /var/lib/jenkins/.ssh/id_dsa
	debug1: Trying private key: /var/lib/jenkins/.ssh/id_ecdsa
	debug1: Trying private key: /var/lib/jenkins/.ssh/id_ed25519
	debug1: No more authentication methods to try.
	Permission denied (publickey).
  • 找到了最关键的目录/var/lib/jenkins/.ssh/
  • 于是进去看了一眼,发现小A的目录下安安静静的躺着三个文件“authorized_keys id_rsa id_rsa.pub”
  • 而小B的目录下空空如也
  • 于是把小B的~/.ssh/复制到/var/lib/jenkins/.ssh/
  • 果然,jenkins任务成功执行了

至此,大功告成

END

未完待续……

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