Renaming a PVE node: Difference between revisions

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(categorize article as HOWTO and WIP as its not bad or wrong but lacking information.)
 
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= Work in progress =
== Introduction ==


Quick notes gathered from various other places including the forum:
Proxmox VE uses the ''hostname'' as a nodes name, so changing it works similar to changing the host name.
This must be done on a empty node.


To rename a standalone PVE host, you need to edit:
== Change Hostname ==
 
Rename a standalone PVE host, you '''need''' to edit the following files:
* /etc/hosts
* /etc/hosts
* /etc/hostname
* /etc/hostname
You can use pre-installed editor like <code>nano</code> (easy) or <code>vi</code> (advanced), for example:
nano /etc/hosts
In the above files replace all occurrences of the ''old name'' with the '''new one'''. Ensure that <tt>/etc/hosts</tt> has an entry with the hostname mapped to the IP you want to use as main IP address for this node.
There are other files which you may want to edit, they are not important for the functions of Proxmox VE itself.
* /etc/mailname
* /etc/mailname
* /etc/postfix/main.cf
* /etc/postfix/main.cf
If your node is in a '''cluster''', where it is not recommended changing its name, adapt <code>/etc/pve/corosync.conf</code> so that the nodes name is changed also there.
See https://pve.proxmox.com/pve-docs/chapter-pvecm.html#pvecm_edit_corosync_conf
== Cleanup ==


The SSH keys don't need to be edited unless you really want to (and if you do, make sure you make the corresponding change on every other machine that SSH public key appears on).
The SSH keys don't need to be edited unless you really want to (and if you do, make sure you make the corresponding change on every other machine that SSH public key appears on).
It appears that /etc/motd gets regenerated automatically.


Then copy the contents of /etc/pve/nodes/''old-hostname'' to /etc/pve/nodes/''new-hostname'' (apparently renaming doesn't work).
Now move the configuration files, as the ''pmxcfs'' has a few restrictions to ensure consistency you cannot rename non empty folders. Thus if you have VMs or Containers on the node, which is not recommended when changing a nodes name, you have to recreate the folder structure and copy files per folder level.
Also copy the contents of /var/lib/rrdcache/db/pve2-{node,storage}/''old-hostname'' to /var/lib/rrdcache/db/pve2-{node,storage}/''new-hostname'' and remove the old directory.
 
Also copy the contents of <tt>/var/lib/rrdcached/db/pve2-{node,storage}/''old-hostname''</tt> to <tt>/var/lib/rrdcached/db/pve2-{node,storage}/''new-hostname''</tt> and remove the old directory.
 
== References ==


* [https://forum.proxmox.com/threads/proxmox-node-name-change.14327/ Forum Post]


[[Category: HOWTO]]
[[Category: HOWTO]]
[[Category: WIP]]

Latest revision as of 05:19, 18 July 2022

Introduction

Proxmox VE uses the hostname as a nodes name, so changing it works similar to changing the host name. This must be done on a empty node.

Change Hostname

Rename a standalone PVE host, you need to edit the following files:

  • /etc/hosts
  • /etc/hostname

You can use pre-installed editor like nano (easy) or vi (advanced), for example:

nano /etc/hosts

In the above files replace all occurrences of the old name with the new one. Ensure that /etc/hosts has an entry with the hostname mapped to the IP you want to use as main IP address for this node.

There are other files which you may want to edit, they are not important for the functions of Proxmox VE itself.

  • /etc/mailname
  • /etc/postfix/main.cf

If your node is in a cluster, where it is not recommended changing 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

Cleanup

The SSH keys don't need to be edited unless you really want to (and if you do, make sure you make the corresponding change on every other machine that SSH public key appears on).

Now move the configuration files, as the pmxcfs has a few restrictions to ensure consistency you cannot rename non empty folders. Thus if you have VMs or Containers on the node, which is not recommended when changing a nodes name, you have to recreate the folder structure and copy files per folder level.

Also copy the contents of /var/lib/rrdcached/db/pve2-{node,storage}/old-hostname to /var/lib/rrdcached/db/pve2-{node,storage}/new-hostname and remove the old directory.

References