proxmox not respecting .pve-ignore file

[markusn]

Good Day!

I am running a Debian 10 LXC container on PVE 7.1-8.
I recently configured systemd-resolved in order to achieve dns caching on that container. This requires /etc/resolv.conf to be modified. That works for some time, but at some point proxmox overwrites this file with its own configuration, rendering systemd-resolved useless. After some searching i found a way that is supposed to prevent these files from being overwritten by proxmox (see https://pve.proxmox.com/wiki/Linux_Container#_guest_operating_system_configuration). I created the file /etc/.pve-ignore.resolv.conf, however, seemingly randomly, and on reboot, this file is still being overwritten by proxmox.

For the sake of completeness, this is the config file for said container:

arch: amd64 cores: 4 hostname: zabbix.chanoa.de memory: 4096 net0: name=eth0,bridge=vmbr0,firewall=1,hwaddr=9A:AD:34:C5:64:89,ip=dhcp,ip6=auto,tag=130,type=veth onboot: 1 ostype: debian rootfs: local-lvm:vm-100-disk-0,size=32G swap: 0 unprivileged: 1

Am i missing something?

 

[Stoiko Ivanov]

Am i missing something?

on a hunch - since the container gets it's IP via DHCP - could the dhclient simply overwrite the /etc/resolv.conf?

what's it's content after a fresh boot?

I hope this hleps!

 

[markusn]

Yes, you are correct, it was indeed dhcp overwriting that file. I was able to stop it from overwriting the file by creating a hook script like described here: https://www.cyberciti.biz/faq/dhclient-etcresolvconf-hooks/

Thank you very much!