[Bug 1784834] Re: maas: incomplete bridge configuration for VLANs

[James Page]

** Also affects: netplan
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1784834

Title:
  maas: incomplete bridge configuration for VLANs

Status in juju:
  Incomplete
Status in netplan:
  New
Status in netplan.io package in Ubuntu:
  New

Bug description:
  Juju: 2.4.1
  MAAS: 2.3.3
  Ubuntu: 18.04 with latest updates

  Relatively simple four machine deployment; machines have connectivity
  via two physical nics, on with two spaces configured, and the second
  with just a single space configured (see cloud-init-netplan.yaml for
  provisioned information).

  I think I'm seeing a race between juju reworking the base netplan configuration with bridges, and LXD containers being started which results in a lack of bridges to two spaces on some machines (see
  juju-98-netplan.yaml).

  On machines where I see missing bridges I also see:

  ubuntu at node-urey:~$ ls -lrt /etc/netplan/
  total 12
  -rw-r--r-- 1 root root 1712 Aug  1 09:40 50-cloud-init.yaml.bak.1533116635
  -rw-r--r-- 1 root root 1166 Aug  1 09:43 99-juju.yaml.bak.1533116651
  -rw-r--r-- 1 root root 1166 Aug  1 09:44 98-juju.yaml

  vs

  ubuntu at node-pytheas:/etc/netplan$ ls -lrt
  total 16
  -rw-r--r-- 1 root root 1713 Aug  1 09:40 50-cloud-init.yaml.bak.1533116672
  -rw-r--r-- 1 root root 1270 Aug  1 09:44 99-juju.yaml.bak.1533116688
  -rw-r--r-- 1 root root 1270 Aug  1 09:44 98-juju.yaml.bak.1533116704
  -rw-r--r-- 1 root root 1270 Aug  1 09:45 99-juju.yaml

  on one where the bridges have been configured (see
  juju-99-netplan.yaml).

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