Comment 10 for bug 1883599

Reviewed: https://review.opendev.org/736247
Committed: https://git.openstack.org/cgit/starlingx/distcloud/commit/?id=e8d916756d439cf63eed52f347a2a547fc5124cb
Submitter: Zuul
Branch: master

commit e8d916756d439cf63eed52f347a2a547fc5124cb
Author: Andy Ning <email address hidden>
Date: Wed Jun 17 10:40:23 2020 -0400

    Set up /var/run/dcmanager as dcmanager's default temp files location

    dcmanager call the k8s python client to perform a number of
    operations. The k8s python client creates temp files under /tmp and
    continues use these tmp files for the life-cycle of the processes.

    However systemd-tmpfiles-clean.service will run every day to clean up
    files in /tmp dir that are older than 10 days. If the k8s client code
    is not triggered for more than 10 days (thus its temp files are not
    accessed for more than 10 days), these temp files will be removed as
    part of the cleanup. Certain dcmanager operations then starts to fail
    with an error that the tmp file is no longer there.

    This is a known issue of kubernetes python client:
    https://github.com/kubernetes-client/python/issues/765

    The commit fixes this issue by setting TMPDIR to /var/run/dcmanager
    when sm starts dcmanager-manager.

    Change-Id: Ib147c2ab26e303032e18da51a506e3768bc471e0
    Closes-Bug: 1883599
    Signed-off-by: Andy Ning <email address hidden>