[SOLVED] Same ID for 2 nodes in cluster

[Adnan]

I have 2 servers in a cluster, different machine, different location, but in a cluster.

I can see that these 2 servers have the same ID, I personally don't mind but I wanted to try cv4pve, which crashed because the 2 nodes have the same server ID. They are telling me it's because I cloned the servers (which I didn't, why would I bother).

Is it normal maybe for 2 servers in a cluster to have the same id? If not, is it an issue for the cluster itself? If not, is there something that could explain that?

 

[Moayad]

Hi,

I can see that these 2 servers have the same ID, I personally don't mind but I wanted to try cv4pve, which crashed because the 2 nodes have the same server ID. They are telling me it's because I cloned the servers (which I didn't, why would I bother).

Weird? If you are sure that you didn't clone the server (what a coincidence ). However, you can try to change the Server ID by generating/changing a new (SSH host key). To do that delete the ssh host keys: rm /etc/ssh/ssh_host_* or backup them mv /etc/ssh/ssh_host_* /path/to/backup/
then re-configure new host key using dpkg-reconfigure openssh-server.

Then check the Server ID again pvesubscription get | grep serverid you will see another ID.

hope that helps

 

[Adnan]

Weird? If you are sure that you didn't clone the server (what a coincidence ).

Well... I'm sure, these are SoYouStart servers, one un Canada, one in Poland, both installed using their online installer (their image), and I don't have access to boot. So I have no way to clone them even if I wanted to

However, you can try to change the Server ID by generating/changing a new (SSH host key).

So you're saying that I could have copy pasted the servers' ssh_host_*... Again, this could be a reason. I'm sure I copy-pasted /etc/pve from 1st to 2nd server, but not host keys

Anyway, can you confirm it won't bother the cluster please?

Thanks for your doubts help!

 

[Moayad]

Hi,

I have tested it on my test cluster it works without any issue. However, I suggest you make a backup before doing anything

 

[Adnan]

I suggest you make a backup before doing anything

Well. If it fails, I'll just have to clone it again, won't I ?

ಠ‿ಠ

 

[Moayad]

you can backup and restore [0] the VMs and important things from the node that you want to change the Server ID

[0] https://pve.proxmox.com/pve-docs/chapter-vzdump.html

 

[Adnan]

It was a test server, I wanted to try to regenerate the keys, but it ended up expiring because I ordered a more powerful machine.

Thank you for your help !