[SOLVED] Proxmox Failed to show VNC Console

[luqmantanya]

I cant console to a VM from my host proxmox,

My environment is following the setup of 4 Node Proxmox.
1. pve0
2. pve1
3. pve2
4. pve3

I cant use the VNC Console on the on pve0 to console to the VM in pve1. from other pve1-3, i can console the VM normally.
it will return error: "Host key verification failed. TASK ERROR: Failed to run vncproxy."

i have also tried to the migration from pve1 to pve0 and it works fine, but not vice versa, it will failed

I have try to SSH from pve0 to all pve node without password and it is working fine

does anyone have similar issue?

 

[gfngfn256]

I have try to SSH from pve0 to all pve node without password and it is working fine

Have you tried this with both the IP address & the actual Hostname?

 

[luqmantanya]

Have you tried this with both the IP address & the actual Hostname?

i tried with IP it working but not with hostname, but nvm i found the fix:

run on pve0
/usr/bin/ssh -e none -o 'HostKeyAlias=server-b-name' root@server-b-ip-address /bin/true

 

[gfngfn256]

That would confirm in fact that the Host key wasn't working for the Hostname (alias).

Mark the thread title with [SOLVED]

 

[UdoB]

Make sure hostnames are correctly configured on all Nodes and name resolution works accordingly. Either set up full-blown DNS or maintain consistent /etc/hosts.

Adapt my "pm" to be "pve" and run this snippet (it is verbatim from my test-cluster):

~# for H in 0 1 2 3; do echo "---------- $H:";  ssh pm$H "  whoami  " ; done
---------- 0:
root
---------- 1:
root
---------- 2:
root
---------- 3:
root