Allow selecting custom storage layout in UI

[Alberto Donato]

MAAS now allows to create a custom storage layout for a machine, by providing the configuration at commissioning time (from a custom commissioning script).

An additional "custom" storage layout is available, and selectable from the API.

It should be possible to apply the custom layout through the UI as well.

If the machine doesn't have custom layout configuration from commissioning, an error will be raised.

[Caleb Ellis (caleb-ellis)]

To clarify, for this bug to be fixed should we just be adding an extra option to the "Change storage layout" dropdown for a "custom" storage layout? IIUC the commissioning form should not need to be changed.

Also is there any machine data that can be used to determine whether custom storage is possible or not ahead of time?

[Alberto Donato (ack)]

@Caleb,

correct, the easiest way to provide the option would be to just add an entry in the layouts list for "custom".

WRT knowing if a machine has a custom layout defined, it's possible (the information is stored as part of the machine resources output from commissioning scripts), but we'd have to add the extra info in the websocket handler since it's currently not there.

[Anton Smith (anton5mith)]

I think this would be a great feature to have in the UI as soon as we can. My vote is we try to bring it in, depending on impact on the release schedule, or release it as an update.