How do I use SSH in a Jenkins pipeline?

Question

I have some Jenkins jobs defined using a Jenkins Pipeline Model Definition, which builds NPM projects. I use Docker containers to build these projects (using a common image

Answer 1

To add a remote host to known hosts and hopefully cope with your error try to manually ssh from the Jenkins host to the target host as the Jenkins user.

Get on the host where Jenkins is installed. Type

sudo su jenkins

Now use ssh or scp like

ssh username@server

You should be prompted like this:

The authenticity of host 'server (ip)' can't be established. ECDSA key fingerprint is SHA256:some-weird-string. Are you sure you want to continue connecting (yes/no)?

Type yes. The server will be permanently added as a known host. Don't even bother passing a password, just Ctrl + C and try running a Jenkins job.