[SOLVED] console: Failed to connect to server: Host Key verification failed

[hellfire]

When I request the console I get the following error in the console window:

failed to connect to server

In the log line I get:

Host Key verification failed
TASK ERROR: Failed to run vncproxy.

I have this error now and then(after reinstalling,...) and will describe the solution:

The problem is, that the host where I started the WebGUI(server-a) has an incorrect ssh-host-key for the host the vm is on(server-b) and can not open a console(or migrate). To fix this the following is necessary:

• Open a root console at server-a
• run the command:
  

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

  server-b-name is the name of the node server-b in the cluster
  server-b-ip-address is the primary cluster-ip-address of server-b
  
  Example:
  
  My server is named px03 and its primary ip address is 192.168.207.12
  
  

  /usr/bin/ssh -e none -o 'HostKeyAlias=px03' root@192.168.207.12 /bin/true

  
  
• If there are any errors fix them according to the ssh output. Host Key Verification failed means there's a wrong key in /root/.ssh/known_hosts. The wrong key should be removed and the new key should be accepted when prompted for at the ssh command.
  
  
• If the command succeeds with no output all should be perfect agin

 

[proxmox-fan]

I encountered this issue, and your solution worked for me. Thank you!

I was curious how /etc/ssh/ssh_known_hosts had the alias for the other node without the IP - the 'HostKeyAlias' ssh option clarified this.

 

[israel.viana]

Maravilha, estava com o Seguinte Erro ao Conectar não VNCPROXY:


A verificação da chave do host falhou.
ERRO DE TAREFA: falha ao executar vncproxy.

Mesmo refazendo as chaves dos hosts (nem sei se isso pode afetar o Cluster) nada funcionava, com essa dica, tudo ficou 100% !!!!!

Parabens!!!!!!!!!!!!!!!!!!!!!!

 

[t.lamprecht]

Maravilha, estava com o Seguinte Erro ao Conectar não VNCPROXY:


A verificação da chave do host falhou.
ERRO DE TAREFA: falha ao executar vncproxy.

Mesmo refazendo as chaves dos hosts (nem sei se isso pode afetar o Cluster) nada funcionava, com essa dica, tudo ficou 100% !!!!!

Parabens!!!!!!!!!!!!!!!!!!!!!!

Great that you could solve your issue, but please remember that this is an international English-speaking forum to provide answers for a broad audience. We do not have a Portuguese sub-forum, I'm afraid, so I'd be great if you could post in English - thanks!

 

[Aleponce]

It worked for me. Thank you for the tip

 

[c0by]

When I request the console I get the following error in the console window:

failed to connect to server

In the log line I get:

Host Key verification failed
TASK ERROR: Failed to run vncproxy.

I have this error now and then(after reinstalling,...) and will describe the solution:

The problem is, that the host where I started the WebGUI(server-a) has an incorrect ssh-host-key for the host the vm is on(server-b) and can not open a console(or migrate). To fix this the following is necessary:

• Open a root console at server-a
• run the command:
  

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

  server-b-name is the name of the node server-b in the cluster
  server-b-ip-address is the primary cluster-ip-address of server-b
  
  Example:
  
  My server is named px03 and its primary ip address is 192.168.207.12
  
  

  /usr/bin/ssh -e none -o 'HostKeyAlias=px03' root@192.168.207.12 /bin/true

  
  
• If there are any errors fix them according to the ssh output. Host Key Verification failed means there's a wrong key in /root/.ssh/known_hosts. The wrong key should be removed and the new key should be accepted when prompted for at the ssh command.
  
  
• If the command succeeds with no output all should be perfect agin

made my day. big thx.

 

[battaglin]

Thank you Hellfire... your solution helped... Just had this error 10/10 ;.)

 

[Cheffabbio]

Thanks Hellfire, it worked for me as well!

 

[paulholyoak]

When I request the console I get the following error in the console window:

failed to connect to server

In the log line I get:

Host Key verification failed
TASK ERROR: Failed to run vncproxy.

I have this error now and then(after reinstalling,...) and will describe the solution:

The problem is, that the host where I started the WebGUI(server-a) has an incorrect ssh-host-key for the host the vm is on(server-b) and can not open a console(or migrate). To fix this the following is necessary:

• Open a root console at server-a
• run the command:
  

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

  server-b-name is the name of the node server-b in the cluster
  server-b-ip-address is the primary cluster-ip-address of server-b
  
  Example:
  
  My server is named px03 and its primary ip address is 192.168.207.12
  
  

  /usr/bin/ssh -e none -o 'HostKeyAlias=px03' root@192.168.207.12 /bin/true

  
  
• If there are any errors fix them according to the ssh output. Host Key Verification failed means there's a wrong key in /root/.ssh/known_hosts. The wrong key should be removed and the new key should be accepted when prompted for at the ssh command.
  
  
• If the command succeeds with no output all should be perfect agin

thank you this solved my issue

 

[dthomasdigital]

That didn't work for me still getting "Failed to connect to server".

Update: Never mind I needed to do pvecm updatecerts

 

[Fatz]

This worked for me after lots of refreshing authorized_keys and known_hosts did not resolve the issue. Thanks!