Difference between revisions of "Renaming a PVE node"

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(Try to extend page a bit; state that its only recommended to change empty nodes name; explain why a rename of the old /etc/pve node folder does not work.)
(Change Hostname: pvelocalhost is not used anymore)
 
(3 intermediate revisions by 3 users not shown)
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== Introduction ==
 +
 
Proxmox VE uses the ''hostname'' as a nodes name, so changing it works similar to changing the host name.
 
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.
 
This must be done on a empty node.
  
= Change Hostname =
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== Change Hostname ==
  
To rename a standalone PVE host, you '''need''' to edit:
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Rename a standalone PVE host, you '''need''' to edit:
 
* /etc/hosts
 
* /etc/hosts
 
* /etc/hostname
 
* /etc/hostname
  
There replace all occurrences of the old name with the new one. Ensure that /etc/hosts has an entry with the local nodes IP address with the pvelocalhost name.
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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.
As this is used to decide to which network interface Proxmox VE's web UI will bind to.
 
  
 
There are other files which you may want to edit, they are not important for the functions of Proxmox VE itself.
 
There are other files which you may want to edit, they are not important for the functions of Proxmox VE itself.
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* /etc/postfix/main.cf
 
* /etc/postfix/main.cf
  
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.
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If your node is in a cluster, where it is not recommended to change its name, adapt <tt>/etc/pve/corosync.conf</tt> so that the nodes name is changed also there.
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See https://pve.proxmox.com/pve-docs/chapter-pvecm.html#edit-corosync-conf
  
= Cleanup =
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== 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).
  
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.
+
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 <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.
 +
 
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== References ==
  
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.
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* [https://forum.proxmox.com/threads/proxmox-node-name-change.14327/ Forum Post]
  
 
[[Category: HOWTO]]
 
[[Category: HOWTO]]
[[Category: WIP]]
 

Latest revision as of 08:00, 7 September 2018

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:

  • /etc/hosts
  • /etc/hostname

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 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#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