We’re using Jenkins v1.549 with a newly added Linux node.
When trying to launch slave via execution of the command below on the master:
# ssh -24i /var/lib/jenkins/.ssh/key.pem email@example.com java -jar ~/slave.jar
The following error occurs:
“Host key verification failed”
The simple workaround is to connect to the Jenkins server via SSH, and run the following command accepting the connection:
# su - jenkins -c "ssh -24i /var/lib/jenkins/.ssh/key.pem firstname.lastname@example.org" The authenticity of host '[example.com]:22' can't be established. ECDSA key fingerprint is aa:bb:cc:00:11:22:33:44:55:66:77:88:99:aa:bb:cc. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '[example.com]:22' (ECDSA) to the list of known hosts.
This will add the host key for node.example.com to the
/var/lib/jenkins/.ssh/known_hosts and the subsequent call of the master command above won’t generate the error.