Comment 10 for bug 1818239

Reviewed: https://review.openstack.org/640961
Committed: https://git.openstack.org/cgit/openstack/charm-nova-cloud-controller/commit/?id=56de84a81be00bf9ddffca4426d28c17d5d9798e
Submitter: Zuul
Branch: stable/18.11

commit 56de84a81be00bf9ddffca4426d28c17d5d9798e
Author: James Page <email address hidden>
Date: Mon Mar 4 09:25:46 2019 +0000

    Disable BuildFailureWeigher

    Disable the BuildFailureWeigher used when weighting hosts during
    instance scheduling. A single build failure will result in a
    -1000000 weighting which effectively excludes the hypervisor
    from the scheduling decision.

    A bad image can result in build failures resulting in a heavy
    load on hypervisors which have not had a build failure with
    those that have effectively being ignored; the build failure
    count will be reset on a successful build but due to the high
    weighting this won't happen until all resources on known good
    hypervisors have been completely consumed.

    Change-Id: I4d4367ef20e2a20aee1e26d4a0ec69cad2ac69d6
    Closes-Bug: 1818239
    (cherry picked from commit c5029e9831ab5063485877213987d6827c4d86f1)