Comment 5 for bug 1921714

Reviewed: https://review.opendev.org/c/openstack/tripleo-common/+/785325
Committed: https://opendev.org/openstack/tripleo-common/commit/654dc08547accf2f4804e15cb1a5b9a7d93ae2a0
Submitter: "Zuul (22348)"
Branch: stable/ussuri

commit 654dc08547accf2f4804e15cb1a5b9a7d93ae2a0
Author: Cédric Jeanneret <email address hidden>
Date: Tue Apr 6 17:46:43 2021 +0200

    healthcheck_port: drop lsof in favor of awk/find

    It seems lsof is a bit too heavy on the system when multiple
    healthchecks are running in parallel.
    So instead of calling a "big" process, let's split a bit things and get
    to the filesystem directly in order to pick only the things we actually
    need.

    What changes:
    - using /proc/net/{tcp,udp}, we get every socket matching the port
    - using find with the right options, we can ensure at least one socket
      exists with the wanted inode(s)

    The last part exits as soon as we have a match in order to make it
    faster and less resource consuming.

    Change-Id: I64776992a7e457781aa8ddaba359ef085d4cb77d
    Partial-Bug: #1921714
    (cherry picked from commit a072a7f07ea75933a2372b1a95ae960095a3250e)