Remote command execution failed: Host key verification faile

[danoreilly]

Same issue.

[abrist]

Can you check the remote system's logs for more info?

[danoreilly]

Nothing really obvious. From auth.log:
Dec 3 11:17:15 ubdepot sshd[11205]: Accepted publickey for nagios from 10.18.215.98 port 34782 ssh2: RSA fd:3c:56:ed:a8:76:e1:01:bf:0e:cb:56:04:64:68:61
Dec 3 11:17:15 ubdepot sshd[11205]: pam_unix(sshd:session): session opened for user nagios by (uid=0)
Dec 3 11:17:15 ubdepot systemd-logind[504]: Removed session 37.
Dec 3 11:17:15 ubdepot systemd-logind[504]: New session 38 of user nagios.
Dec 3 11:17:16 ubdepot sshd[11295]: Received disconnect from 10.18.215.98: 11: disconnected by user

NOthing really in any other logs. I really need to get this thing going, as it's a POC for possibly doing this enterprise-wide. ANy help gratefully accepted.

Thanks!

[eloyd]

The simple answer to your problem is that the host key for the remote machine does not match what your local SSH client thinks it should be when you SSH to the remote host.

Really, the only way this can happen is if you have an old host key, incorrect host key, or if you are using a different host name. So that leads me to this:

When nagios is SSHing to the remote host, is it doing it by name or IP? I'm guessing it's by IP. IP != name, and that's where your problem is stemming from. Try ssh <remote.ip.address> and see if you can create the hostkey, then see if Nagios's ssh works.

[sreinhardt]

Sounds like eloyd is right on top of things as usual. Dan, let us know how connecting both(or at least how you have the hostaddress field) ways works for you and with the check beyond that.

[danoreilly]

Actually, given the potential size of the system space we're looking at, we've decided not to go with the ssh route. Too expensive. I really do appreciate the help on this, thanks very much!

[eloyd]

SSH is free. I do not understand what you mean by "too expensive." Do you mean it requires too many resources? You are free to do what you want but I am just trying to understand what you're saying.

[tmcdonald]

Do you mean it requires too many resources?

That was the impression I got.