Configuring network settings for Proxmox installs

CCWTech

We configure servers at our HQ and then need to send them out to clients sites.

We set them to DHCP so that they will pickup an IP once it gets to the client's network as their IP addressing configuration is most likely different than ours.

We are running into challenges changing them back to static when they arrive at a clients site.

To get it to DHCP we are going into /etc/network/interfaces

Is this the best way to set it to DHCP?

Then, once it get's to the clients site, what is the best way to get it to a static IP (including the IP address that shows up on the login screen).

Please be a bit verbose, I'm still fairly new to ProxMox and the Linux world.

black3dynamite

Take a look at the network configuration section of PVE Docs.
https://pve.proxmox.com/pve-docs/chapter-sysadmin.html#sysadmin_network_configuration

You can either make changes via the Web GUI or modify /etc/network/interfaces file directly. They do prefer users to use the Web GUI because when you modify the networking configuration from the GUI it will temporary creates a /etc/network/interfaces.new file to help you double check your new setup before you reboot to apply the new changes.

Setting up DHCP Linux bridge will require you to modify the interfaces file directly.
BE WARNED, I have not confirm if this works correctly for the DHCP setup.

DHCP setup with Linux bridge

auto lo
iface lo inet loopback

iface eno1 inet dhcp

auto vmbr0
iface vmbr0 inet dhcp
        bridge_ports eno1
        bridge_stp off
        bridge_fd 0

And with default static Linux bridge setup you can do that either by GUI or directly.

Static setup with Linux bridge

auto lo
iface lo inet loopback

iface eno1 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.1.93
        netmask 255.255.255.0
        gateway 192.168.1.1
        bridge_ports eno1
        bridge_stp off
        bridge_fd 0

Also you will need to make sure /etc/resolv.conf is configured correctly, either by using GUI or directly.

search example.com
nameserver 192.168.1.1
nameserver 1.1.1.1
nameserver 8.8.8.8

CCWTech

Thank's @black3dynamite

Is it the etc/hosts file that determines what is shown on the login screen as what the IP address of the server is?

black3dynamite

@CCWTech said in Configuring network settings for Proxmox installs:

Thank's @black3dynamite

Is it the etc/hosts file that determines what is shown on the login screen as what the IP address of the server is?

My bad, you would need to make sure the IP address in /etc/hosts is updated too.

CCWTech

TY @black3dynamite