Cluster

[Orkhan]

Hello!

I accidentally created a cluster with the wrong IP. There are currently active and important virtual machines in the cluster. How can I delete or modify a cluster without deleting the virtual machines? Then I'll create it again.

Thank you very much!

 

[bbgeek17]

You dont need to delete the VMs, there are threads about it in the forum and on the webs. Which procedure to follow will depend on your situation.

https://forum.proxmox.com/threads/change-cluster-nodes-ip-addresses.33406/
https://bobcares.com/blog/configuring-proxmox-change-ip-address-of-your-node-in-3-simple-steps/

---

Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[oguz]

hi,

I accidentally created a cluster with the wrong IP. There are currently active and important virtual machines in the cluster. How can I delete or modify a cluster without deleting the virtual machines? Then I'll create it again.

did you make a cluster on a single node? or did you already add the other nodes?

you have these options:
1. separate nodes from the cluster and remake it [0]
2. change the IP address of the nodes in the cluster [1]

beware:

If your node is in a cluster, where it is not recommended to change its name, adapt /etc/pve/corosync.conf so that the nodes name is changed also there. See https://pve.proxmox.com/pve-docs/chapter-pvecm.html#pvecm_edit_corosync_conf

[0]: https://pve.proxmox.com/pve-docs/chapter-pvecm.html#_remove_a_cluster_node
[1]: https://pve.proxmox.com/wiki/Renaming_a_PVE_node

 

[Orkhan]

Thank you very much for your answers.

I have 2 servers. 1 have many active VMs, second is new and it's no VMs. I add cluster in first servers, give name and etc. And I have key for other server. I go to second server, choose Datacenter -> Cluster and push "Join Cluster", add key and get wrong IP information. Now I must delete cluster from first server, in second I don't create cluster.

 

[Orkhan]

I delete cluster. And all VMs is good. But when I enter this command:

systemctl status corosync

Get this:

corosync.service - Corosync Cluster Engine
   Loaded: loaded (/lib/systemd/system/corosync.service; enabled; vendor preset:
   Active: inactive (dead)
Condition: start condition failed at Wed 2022-01-19 19:47:02 +04; 5min ago
           └─ ConditionPathExists=/etc/corosync/corosync.conf was not met
     Docs: man:corosync
           man:corosync.conf
           man:corosync_overview

Jan 19 19:47:02 pve systemd[1]: Condition check resulted in Corosync Cluster Eng

It's normal?

Also when I try to join cluster get this message:

detected the following error(s):
* this host already contains virtual guests
* local node address: cannot use IP 'my-ip-address', not found on local node!

TASK ERROR: Check if node may join a cluster failed!

I think I broke something.

 

[oguz]

did you check the 2nd link i posted?

local node address: cannot use IP 'my-ip-address', not found on local node!

check your /etc/hosts and /etc/hostname files too