Comment 4 for bug 1962779

Reviewed: https://review.opendev.org/c/starlingx/config/+/869224
Committed: https://opendev.org/starlingx/config/commit/9ad267fe448fd2aa402fff9e49f235d189c55068
Submitter: "Zuul (22348)"
Branch: master

commit 9ad267fe448fd2aa402fff9e49f235d189c55068
Author: Heitor Matsui <email address hidden>
Date: Wed Jan 4 11:41:31 2023 -0300

    Unstuck loads hung in importing state

    There are known situations where a load might get stuck in
    a transient state, like "importing", such as if conductor
    restarts during the load import process. In this case, the
    load stays permanently in importing state and there are no
    mechanisms to remove it from this stuck state, currently.

    This commit adds the functionality to set loads in transient
    state to 'error' and unmount them from the temporary directory
    during conductor startup, so that the load can be deleted and
    reimported.

    Test Plan
    PASS: run load import, restart conductor to simulate the failure
          and verify that the load is unmounted and set to error state
          after conductor comes back online, then verify that load can
          be deleted and reimported successfully
    PASS: regression - import load successfully in a "no-error" scenario
    PASS: run both tests with and without load-import "--local" option
    PASS: all of the above with "--os-region-name SystemController"

    Relates-to: https://review.opendev.org/c/starlingx/config/+/832789
    Closes-bug: 1962779

    Signed-off-by: Heitor Matsui <email address hidden>
    Change-Id: I909ebcd9448974d95200c6d5c79e7428b232d0a8