Composing machine via UI does not appear in pod machine list

[Chris Johnston]

In 2.5.3 when composing a new machine the new machine would appear in the pod machine list.

In 2.6, this has regressed and it no longer shows up in the machine list. The count at the top of the pods page shows the updated machine count, but you can't see the new machine.

[Jerzy Husakowski (jhusakowski)]

The UI has changed significantly since this issue was submitted. Could you retest on a recent MAAS (3.3+) and let us know if this is still a problem?

[Trent Lloyd (lathiat)]

Confirmed this still occurs on MAAS 3.3.4.

1. Deploy MAAS 3.3.4
2. Select KVM tab
3. Configure an LXD VM host
4. Select the host
5. Select "Add VM"
6. Name the machine, leave everything else default, click Compose machine
7. After clicking compose, the following is observed
- A waiting spinner spins for 2-3 seconds, then the page appears to refresh (still on to http://maas.maas:5240/MAAS/r/kvm/lxd/12/vms)
- The list of VMs still only has 3 VMs and the count shows "1 - 3 of 3"
- However: The RAM "Allocated" count and "CPU Cores" went up. At the top of the page right under the menubar it now says "VMs: 4 available"
- Another tab left open for the same page also did not automatically in exactly the same way. The list of VMs was not updated but the host metadata was.
- Another tab left open at http://maas.maas:5240/MAAS/r/machines also does not automatically update.
- By contrast, if you delete the VMs on one tab, all the other tabs (both the KVM and main machine list at /MAAS/r/machines) update and remove it
- If you use "Add hardware" -> Machine and manually define a machine, it also does not appear on the current or other background tabs.

The above has me guessing that all of the machine lists (not just the KVM page) are subscribing specifically for updates to machines on screen, but not newly added machines or otherwise a change to the filter results.

[Björn Tillenius (bjornt)]

UI team, any ideas on how to fix this?

[Thorsten Merten (thorsten-merten)]

Independently of how we create a VM, the machine list does not seem to be updated.
(tbc) It seems like the information of the new machines is available to the UI