How to set network device names for in cloud-init configuration for VMs?

[Mitchell Monahan]

Creating a cloud-init based VM to try and make it easier to manage, but noticed that proxmox generates a cloud-init network-config file like this:

version: 1
config:
  - type: physical
    name: eth1
    (rest of network info for that interface)
  - type: nameserver
    address:
    - 8.8.8.8
    - 8.8.4.4

The issue i'm having with that configuration is that it hardcodes the network interface name into the configuration, assuming the VM uses the non-predictable network interface naming system that most distros use nowdays. In my case, the VM's network interface is ens18, but proxmox (and thus cloud-init) is using eth0. How do I tell proxmox the names of my interfaces I'm putting on the VM?

 

[Mitchell Monahan]

Also, maybe add a feature for adding custom stuff to the cloud-config configuration so people can use it to, say, run a script? That would make it pretty easy to have Juju deploy to Proxmox VE.

 

[dietmar]

The issue i'm having with that configuration is that it hardcodes the network interface name into the configuration, assuming the VM uses the non-predictable network interface naming system

No, we assume that cloud-init handles the assignment correctly.

 

[Mitchell Monahan]

No, we assume that cloud-init handles the assignment correctly.

Why would it be handled correctly when you guys are telling it the interface name is eth0?

 

[dietmar]

Why would it be handled correctly when you guys are telling it the interface name is eth0?

cloud-init use the MAC address to match the interface. You need a reasonable new version of cloud-init.

 

[Mitchell Monahan]

Would 0.7.9-2 be recent enough? That's the version number on the current Debian 9 (stable) package for cloud-init.