How to configure a network bridge?

[ilsaloving-gander]

Hi,

I'm trying to create a host template I can use for bringing up new cloudstack hosts. The process involves creating 2 network bridges, but no matter what I do I can't get cloud-init to do it. I'm using vsphere as the underlying system to create the hosts.
The host has 3 NICs, for mgmt, public, and storage.
mgmt and public should have bridges, and the bridges should be assigned the main IP instead of the NICs.
So what I am trying to come up with is a way that takes the network information (ip addresses, etc), and transform that into this: https://docs.cloudstack.apache.org/en/4.21.0.0/installguide/hypervisor/kvm.html#configure-rhel-centos-for-advanced-networks

I tried starting off with just a hard-coded config. Starting with this as a base config /etc/cloud/cloud.cfg.d/99-network.cfg

#cloud-config
network:
  version: 2
  ethernets:
    ens33:
      addresses: [0.0.0.0/0]
      dhcp4: no
    ens34:
      addresses: [0.0.0.0/0]
      dhcp4: no

  bridges:
    cloudbr0:
      interfaces: [ens33]
      addresses: [172.16.1.73/24]
      routes:
      - to: default
        via: 172.16.1.1
        metric: 100
        on-link: true
      mtu: 1500
      nameservers:
        addresses: [172.16.1.20]
      parameters:
        stp: true
        forward-delay: 4
      dhcp4: no
      dhcp6: no

    cloudbr1:
      interfaces: [ens34]
      addresses: [172.16.0.70/24]
      mtu: 1500
      parameters:
        stp: true
        forward-delay: 4
      dhcp4: no
      dhcp6: no

I get the error

{'ens33': {'addresses': ['0.0.0.0/0'], 'dhcp4': False}, 'ens34': {'addresses': ['0.0.0.0/0'], 'dhcp4': False}}
2025-10-21 19:19:50,220 - network_state.py[ERROR]: Address default is not a valid ip network
2025-10-21 19:19:50,220 - main.py[ERROR]: failed stage init

I've tried leaving the addresses line out entirely, I get:

2025-10-21 19:36:22,069 - network_state.py[DEBUG]: NetworkState Version2: missing "macaddress" info in config entry: ens33: {'dhcp4': False}
2025-10-21 19:36:22,069 - network_state.py[DEBUG]: v2(ethernets) -> v1(physical):
{'config_id': 'ens33', 'type': 'physical', 'mac_address': None, 'name': 'ens33'}
2025-10-21 19:36:22,072 - network_state.py[DEBUG]: NetworkState Version2: missing "macaddress" info in config entry: ens34: {'dhcp4': False}
2025-10-21 19:36:22,072 - network_state.py[DEBUG]: v2(ethernets) -> v1(physical):
{'config_id': 'ens34', 'type': 'physical', 'mac_address': None, 'name': 'ens34'}
2025-10-21 19:36:22,075 - network_state.py[DEBUG]: v2_common: handling config:
{'ens33': {'dhcp4': False}, 'ens34': {'dhcp4': False}}
2025-10-21 19:36:22,075 - network_state.py[ERROR]: Address default is not a valid ip network
2025-10-21 19:36:22,075 - main.py[ERROR]: failed stage init

At this point I'm at a loss as to how this can be configured, or if it's even possible to configure it this way. Any guidance would be greatly appreciated. Oh, and I'm using Rocky 9, which provides cloud-init 24.4 in it's repos.

[holmanb]

Update: Actually I think this is fixed in release 25.3, see #6391.

[ilsaloving-gander]

Never occured to me to try. Why would I? Unfortunately I was running into too many issues and went with a different solution. I'll revisit this when I have time but that won't be for a while.

[holmanb]

I think this is fixed in release 25.3, see #6391.