Improve coalesce detection

[olivierlambert]

Context

GC/coalesce process in XS/XCP-ng isn't exposed outside. But since xapi-project/sm#524 this will change: a task will be created for each coalesce process. So now we'll have a way to know if a coalesce is active.

Usage

Coupled with our knowledge of chains that must be coalesced, we have a way to show it's in progress, and the progress of this (it's a task with a %).

TODO

• in the task view, translate the UUID given in the task into a SR name label and a link to it (see Improve coalesce detection #5379 (comment))
• in Advanced SR view, we can detect those tasks on a the specific SR and display the task in live there, with its progress.
• add icon to show "SR coalescing" next to SR name (in all SR list ;-) ) #3081

[KittyKatt]

Very interested in this feature. Not asking for an ETA, but expressing a need and interest. 👍

[olivierlambert]

For now, this upstream code isn't inside 8.2 but will probably land in 8.3 :) As soon Citrix Hypervisor 8.3 is out (or/if the patch backported to 8.2), we'll expose that into XO 👍

[olivierlambert]

The task is visible in the task list, but it should be simple to add it to the advanced SR view for the related SR.

[olivierlambert]

@marcungeschikts target before the end of the year

[julien-f]

#3081 should be done at the same time.

[olivierlambert]

Also, the task text is providing the SR UUID with it, so it should be trivial to also translate it toward the SR name with a link to the SR. See:

[olivierlambert]

It's done since XO 5.90