Network interface name being treated as float

[neilgierman]

In my config, my bond name is "2920" and one of my VLAN IDs is "3900". So the name for that vlan interface is "2920.3900" in my network-config. The problem is, I think cloudbase-init (python) thinks it is a float and is dropping the trailing zeroes and my interface name becomes "2920.39". I don't see a way to tell cloudbase-init to treat the vlan interface name as a string, and don't drop the trailing zeroes.

Minimal config with MACs and IPs removed:

version: 1
config:
  - type: physical
    name: eth2
  - type: bond
    name: 2920
    bond_interfaces:
      -  eth2
  - type: vlan
    name: 2920.3900
    vlan_link: 2920
    vlan_id: 3900

[ader1990]

Hello, I tried to reproduce the issue, but could not on my environment.
There is a log info on the https://github.com/cloudbase/cloudbase-init/blob/master/cloudbaseinit/plugins/common/networkconfig.py#L235 that might bring some clarity.

Can you please share the cloudbase-init log related to the above code line?

Thank you.

[neilgierman]

I was able to work around this. If I put the interface name in double quotes, it will keep the trailing zeroes:

......
- type: vlan
  name: "2920.3900"
  vlan_link: 2920
  vlan_id: 3900
.....

[ader1990]

I was able to work around this. If I put the interface name in double quotes, it will keep the trailing zeroes:

......
- type: vlan
  name: "2920.3900"
  vlan_link: 2920
  vlan_id: 3900
.....

Yes, it seems that is in the free format YAML specification. I saw that the network config documentation link is also broken, will update it accordingly to https://docs.cloud-init.io/en/latest/reference/network-config-format-v1.html#network-config-v1.