Console doesn't work from one node to another

[Doug Curtis]

I'm pretty new to the Proxmox environment. I've setup a cluster with two nodes with shared storage. Most everything is working fine except if I am logged into node 1 and try to open a console for a VM on node 2, I receive a message that says "Failed to connect to server". However, if I login to node 2 and open a console for a VM on node 1, it works. From node 2, I can open a console on a VM that is on node 2 or node 1 but I can only open a console for node 1 VMs when logged into node 1.

Any help would be appreciated. Thanks

 

[dcsapak]

does the passwordless ssh connection from node1 to node2 work? this is necessary to tunnel the vnc connection from one host to another
as root on node1 do:

ssh -T -o 'BatchMode=yes' <ip-of-node2>

 

[Doug Curtis]

Looks like the ssh pub key node1 has for node2 is incorrect:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:cDoD0G/iTR0P5LgL+wODRZ7XGXrqMrLXVl1hrLmdhXw.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:2
remove with:
ssh-keygen -f "/root/.ssh/known_hosts" -R 192.168.1.88
ECDSA host key for 192.168.1.88 has changed and you have requested strict checking.
Host key verification failed.

 

[Doug Curtis]

I was able to fix it by removing the bad entry from /etc/ssh/ssh_known_hosts on node1 and readding node2 with --force to the cluster.

Thanks