node rename failed - 2 nodes displayed and old node has the VMs

T

therealivandrago

Member
Jun 6, 2023
33
5
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Hi,

So I followed these steps to rename the host and rebooted but now I somehow have 2 nodes. My VMs are on the hostname with the old node.

How can I get them on the new hostname the safest way possible?

Old hostname: pve
New hostname: nas-proxmox

I also wanted to join the nodes after getting this fixed, would that be possible? is that recommended? forget this I just wanna get my VMs back :(

Code: 
root@nas-proxmox:~# ls -lh /etc/pve/nodes
total 0
drwxr-xr-x 2 root www-data 0 Oct 15 20:32 nas-proxmox
drwxr-xr-x 2 root www-data 0 May 22 23:36 pve
root@nas-proxmox:~# ls -lh /etc/pve/nodes/pve
total 2.0K
-rw-r----- 1 root www-data   84 Oct 15 20:31 lrm_status
drwxr-xr-x 2 root www-data    0 May 22 23:36 lxc
drwxr-xr-x 2 root www-data    0 May 22 23:36 openvz
drwx------ 2 root www-data    0 May 22 23:36 priv
-rw-r----- 1 root www-data 1.7K May 22 23:36 pve-ssl.key
-rw-r----- 1 root www-data 1.8K May 22 23:36 pve-ssl.pem
drwxr-xr-x 2 root www-data    0 May 22 23:36 qemu-server
-rw-r----- 1 root www-data  556 Oct 14 17:50 ssh_known_hosts
root@nas-proxmox:~# ls -lh /etc/pve/nodes/pve/qemu-server/
total 2.0K
-rw-r----- 1 root www-data 612 Jul  6 12:11 100.conf
-rw-r----- 1 root www-data 500 Oct 10 00:53 101.conf
-rw-r----- 1 root www-data 484 Jun  7 14:37 190.conf
-rw-r----- 1 root www-data 422 Oct  9 17:36 900.conf
 
Last edited:
Forgot to add the output of /etc/hosts and /etc/hostname

Code: 
root@nas-proxmox:~# hostnamectl status
 Static hostname: nas-proxmox
       Icon name: computer-desktop
         Chassis: desktop ️
      Machine ID: b81634c81c5844b2b0ed64b992db677e
         Boot ID: 002c91a06f0b41d492d95f38c0ac8738
    Product UUID: 9b006b9c-da91-0000-0000-000000000000
Operating System: Debian GNU/Linux 13 (trixie)
          Kernel: Linux 6.14.11-4-pve
    Architecture: x86-64
 Hardware Vendor: ASRock
  Hardware Model: H510M-HDV/M.2 SE
 Hardware Serial: To Be Filled By O.E.M.
Firmware Version: P1.60
   Firmware Date: Fri 2023-05-05
    Firmware Age: 2y 5month 1w 5d

root@nas-proxmox:~# cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.1.177 nas-proxmox.lan nas-proxmox

# The following lines are desirable for IPv6 capable hosts

::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

root@nas-proxmox:~# cat /etc/hostname
nas-proxmox
 
I've never done this on proxmox but have you tried :
Bash: 
hostnamectl set-hostname <your new hostname>

Maybe, a simpler solution would be, (If your VMs are on a separate drive, backup or you can move them from local lvm...) try reinstall. It's a pain but at least, would be clean. Then restore your VMs, just suggesting something I'd do to avoid all the hassle.
 
Last edited:
proxdox said:
I've never done this on proxmox but have you tried :
Bash: 
hostnamectl set-hostname <your new hostname>

Maybe, a simpler solution would be, (If your VMs are on a separate drive, backup or you can move them from local lvm...) try reinstall. It's a pain but at least, would be clean. Then restore your VMs, just suggesting something I'd do to avoid all the hassle.
Click to expand...

My thinking is if hostnamectl status shows nas-proxmox, which is correct. Then hostname ctl set-hostmane may not make a difference.

The other problem is I have been doing this hostname clean up to prep for the next step. spinning up Proxmox Backup Server, so I can't make backups right now : ( I have a NAS that I can't power on either since it's one of the VMs with all my data and broke with the hostname change

My thinking right now is:

1. what went wrong with the hostname change, i followed the doc. If I could figure that out might help me figure out the next steps.

2. If I know what to copy over to the next node then maybe that would fix it.
 
therealivandrago said:
Hi,

So I followed these steps to rename the host and rebooted but now I somehow have 2 nodes. My VMs are on the hostname with the old node.
Click to expand...
Did you also follow the Cleanup part?
The config files of your vm/lxc have to be manually copied to the folder with new name.
/etc/pve/nodes/pve/qemu-server => /etc/pve/nodes/nas-proxmox/qemu-server
and
/etc/pve/nodes/pve/lxc => /etc/pve/nodes/nas-proxmox/lxc

If everything is transfered you can delete the folder with the old name.
 
fba said:
Did you also follow the Cleanup part?
The config files of your vm/lxc have to be manually copied to the folder with new name.
/etc/pve/nodes/pve/qemu-server => /etc/pve/nodes/nas-proxmox/qemu-server
and
/etc/pve/nodes/pve/lxc => /etc/pve/nodes/nas-proxmox/lxc

If everything is transfered you can delete the folder with the old name.
Click to expand...

Well holy crap I didn't realize it had warnings about changing the node name with VMs "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"

That really should be at the very top of the article :mad:

Essentially I did see The SSH keys don't need to be edited unless you really want to then stopped reading since I didn't care about SSH
 
no issues right now just confused, so the contents of /var/lib/rrdcached/db/pve2-{node,storage}/old-hostname " show as follows

local-lvm.old
local.old

That looks fine, but the /var/lib/rrdcached/db/pve2-{node,storage}/new-hostname this directory just doesn't exist. That said the following does exist but it's not what is described in the documentation

Code: 
root@nas-proxmox:/etc/pve/nodes/pve/qemu-server# ls -lh /var/lib/rrdcached/db/pve-storage-9.0/nas-proxmox/

-rw-r--r-- 1 root root 156K Oct 16 14:43 local
-rw-r--r-- 1 root root 156K Oct 16 14:39 local-lvm

I could just move and reboot the server and hopefully that works but at this rather not use trial and error since as I stated I have no backups or backup server setup yet. Can anyone confirm?
 
Last edited:
So mind don't reflect the documentation, my the one pointing to pve2 like the documentation only has one hostname. The one with pve-storage-9.0 has 2 hostnames.

These are the different directories I have

root@nas-proxmox:~# ls -lh /var/lib/rrdcached/db/pve-storage-9.0/
drwxr-x--- 2 root root 4.0K Oct 15 20:32 nas-proxmox
drwxr-xr-x 2 root root 4.0K Oct 14 15:59 pve

root@nas-proxmox:~# ls -lh /var/lib/rrdcached/db/pve-storage-9.0/nas-proxmox/
-rw-r--r-- 1 root root 156K Oct 16 15:03 local
-rw-r--r-- 1 root root 156K Oct 16 15:02 local-lvm

root@nas-proxmox:~# ls -lh /var/lib/rrdcached/db/pve-storage-9.0/pve/
-rw-r--r-- 1 root root 156K Oct 15 20:31 local
-rw-r--r-- 1 root root 156K Oct 15 20:31 local-lvm

root@nas-proxmox:~# ls -lh /var/lib/rrdcached/db/pve2-storage/pve/
-rw-r--r-- 1 root root 15K Oct 13 22:02 local-lvm.old
-rw-r--r-- 1 root root 15K Oct 13 22:02 local.old
root@nas-proxmox:~#
 
I never cared for /var/lib/rrdcached/db/* as it isn't critical to operation. It is for statistics meaning the data shown in the overview/summary in the web GUI.
 
I solved this by moving the files in here root@nas-proxmox:~# ls -lh /var/lib/rrdcached/db/pve2-storage/pve/ to root@nas-proxmox:~# ls -lh /var/lib/rrdcached/db/pve-storage-9.0/nas-proxmox/

no reboot, it just worked
 
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