[Solved] Add failover IP to host?

[ProxRocks]

Hi,
Despite some searchs on the net, I cannot find how to add a failover IP to my proxmox host. I would like my host to have a second IP so that I can send email via a distinct and dedicated interface.

That host is running Debian (9.9), in Online datacenter (would be the same with OVH from what I've read) and I know how to add a failover IP to a LXC CT. My /etc/network/interfaces looks like this for the host part:

iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static
address a.b.c.d
netmask 255.255.255.0
gateway a.b.c.1
bridge-ports eth0
bridge-stp off
bridge-fd 0
comments6 accept_ra 1​

How should I declare the failover IP (web ui, in a conf file, by script...)? What else should I do (routing, iptables, etc.) to be able to have specific trafic going out that extra interface?
Thank you for your help!

 

[ProxRocks]

I answer myself... To add an failover IP at the host level is done the usual way (see below). The only blocking issue I had was that I had assigned a virtual MAC address to that failover IP - this is required for a failover IP assigned to a container, but is bocking and must be removed for a failover IP assigned to the host. Once I removed the virtual MAC, the IP worked fine.

Here is my config:

iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static
address a.b.c.d
netmask 255.255.255.0
gateway a.b.c.1
bridge-ports eth0
bridge-stp off
bridge-fd 0
comments6 accept_ra 1

auto eth0:0
iface eth0:0 inet static
address w.x.y.z
netmask 255.255.255.255
​