No monitoring for expiry of lb-mgmt-issuing-cacert etc

[Xav Paice]

There is currently no monitoring for the expiry of certificates used by Octavia, settings lb-mgmt-issuing-cacert=, lb-mgmt-controller-cacert, lb-mgmt-controller-cert. If these certificates are left to expire, LBs fail to create/failover etc. The NRPE relation could be extended to issue a warning for certificates due to expire soon, and critical for expired certificates.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/740991

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-octavia/+/740991
Committed: https://opendev.org/openstack/charm-octavia/commit/dbee693a16825a932567edbd375486c2511f4adb
Submitter: "Zuul (22348)"
Branch: master

commit dbee693a16825a932567edbd375486c2511f4adb
Author: David Ames <email address hidden>
Date: Tue Jun 23 22:13:52 2020 +0000

    Add NRPE Check for Octavia Certificates

    Change-Id: Ie4718b2c145e977fd11fff06ed3e854d41715eb8
    Closes-Bug: 1885815