First issue

Multiples environnements

First, I need to connect to my server in SSH and in http to manage Proxmox. Homelab Diagram With this diagram you can see a simple usage of VM machine. But, I have personal conditions.
I need to have a virtual network to have a stable IP of my node in my cluster. But, as you can see, in default with proxmox, you have one bridge created connect to the physical Ethernet port in the server. And, I change environnement to work in my office, and my home because I don’t have an internet box in there, so for connect my server to my PC, I need to connect the Ethernet ports of the server and my PC in direct.

But, without DHCP server I can’t have an IP in my server. I lost 2 hours to find a solution. I force the PC to share wifi connection to the Ethernet port. With this solution, the network DHCP works well with the network 192.168.137.xx. By default the PC is .1 and the server is .2.

With this solution, I can connect to my server.

Virtual brige for the cluster

To prevent a change of the VM during changement of environnement, the solution is to build a virtual brige specific to the cluster. It’s prety easy to create.
I create a vmb1 brige, and I add this brige to all my cluster node and my manager node. I just add new network interface. And, it dosen’t works. Want a virtual network is create, it’s empty. When you connect all your machine in there, it’s like having 4 machines in the same network, but nobody can interact because none have IP aadress. After understand this (it took me 2 houres), I needed install DHCP server on my Proxmox server, and administrate the vmb1 brige to allocate IP adresse automaticaly.

Install DHCP server

This part was prety easy, you just need to choose a DHCP server, and install it. I choose dnsmasqfor this lighweht.

Configure DHCP

Very easy to use with just one file of configuration /etc/dnsmasq.d/<YOUR-INTERFACE-CONFIGURATION>.conf. Want you create this file, you can configure the DHCP with range of IP adresses, and static adress with specific MAC adress. I my case : /etc/dnsmasq.d/vmbr1.conf :

interface=<INTERFACE>                           # Interface 
dhcp-range=<START_IP_ADRESSE,END_IP_ADRESS,12h. # Atribut automaticaly IPs between START and END
dhcp-host=<MAC_ADRESS>,<IP_ADRESS>              # Atribut static IP to specific MAC adress device

In my case, I wanted to have static IP for my nodes and my cluster manager. So I mad this configuration :

interface=vmbr1                        # Interface 
dhcp-range=10.0.0.10,20.0.0.99,12h.    # Atribut automaticaly IPs between yy-zz

# Nodes IPs adress
dhcp-host=AA:BB:CC:DD:EE:01,10.0.0.10  # Atribut static IP to the control node
dhcp-host=AA:BB:CC:DD:EE:02,10.0.0.11  # Atribut static IP to the worker 00
dhcp-host=AA:BB:CC:DD:EE:03,10.0.0.12  # Atribut static IP to the worker 01
# Cluster manager
dhcp-host=AA:BB:CC:DD:EE:04,10.0.0.100 # Atribut static IP to the cluster manager

Result

Now, I have two interface in eche VM, so I can access to the internet with the vmbr0interface, and I can communicate with static IP adress to my 4 machines with the vmbr1interface. Victory … but

Event you have the right configuration in your network stack, you need to configure your VM and talos.linux nodes to be able to interact with the correct interface. For this, you need to change the endpoint, the controlplane.yaml and the worker.yaml to point in the right IP, and have the right network configuration.