Comment 11 for bug 1883599

Reviewed: https://review.opendev.org/754417
Committed: https://git.openstack.org/cgit/starlingx/nfv/commit/?id=43e6a9f768a9a4d7c23abe02d7dfb45a31befc6d
Submitter: Zuul
Branch: master

commit 43e6a9f768a9a4d7c23abe02d7dfb45a31befc6d
Author: Andy Ning <email address hidden>
Date: Fri Sep 25 10:48:11 2020 -0400

    Set up /var/run/nfv-vim as vim's default temp files location

    nfv vim 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 vim 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/nfv-vim
    when sm starts vim.

    Change-Id: I4f0544055e9d10ba2374e9fdb5133d767c1fa2c3
    Closes-Bug: 1883599
    Signed-off-by: Andy Ning <email address hidden>