Why Jenkins says “Server rejected the 1 private key(s)” while launching the agent?

Question

I am successfully able to connect to a remote machine using SSH but when I am launching the agent from Jenkins it throws the following error: ERROR: Server rejected the 1 private key(s) for user1 (credentialId:xxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/method:publickey) [01/19/17 05:35:15] [SSH] Authentication failed. hudson.AbortException: Authentication failed. at hudson.plugins.sshslaves.SSHLauncher.openConnection(SSHLauncher.java:1219) at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:714) at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:709) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) [01/19/17 05:35:15] Launch failed - cleaning up connection [01/19/17 05:35:15] [SSH] Connection closed. I can establish SSH connection from a master machine to the node machine using user1, however, when I am trying to launch the agent using user1 from Jenkins it is rejecting the private key. Is there any solution to overcome this issue? Select the correct answer from above options

Answer 1

The solution to overcome this problem is Goto slave node switch to the root user sudo su Add a user to jenkins home using useradd -d /var/lib/jenkins jenkins Here /var/lib/jenkins is having my home directory Now, from jenkins master copy the id inside id_rsa.pub from jenkins user cat /var/lib/jenkins/.ssh/id_rsa.pub Now, create an authorized_keys file for jenkins user form slave node mkdir /var/lib/jenkins/.ssh And create an authorized_keys file vi /var/lib/jenkins/.ssh/authorized_keys Paste the id that you have copied from id_rsa.pub here and save the file with “:wq!”. This will help you to resolve the issue. For more information please go through the following tutorial to get more info about jenkins: