DNS HA can't install on focal

[Chris MacNaughton]

The ha-relation-changed hook afails because the MAAS stable PPA used doesn't have focal configuration.

2020-06-08 09:07:21 INFO juju-log ha:84: Couldn't acquire DPKG lock. Will retry in 10 seconds
2020-06-08 09:07:31 DEBUG ha-relation-changed Hit:1 http://archive.ubuntu.com/ubuntu focal InRelease
2020-06-08 09:07:31 DEBUG ha-relation-changed Ign:2 http://ppa.launchpad.net/maas/stable/ubuntu focal InRelease
2020-06-08 09:07:31 DEBUG ha-relation-changed Get:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease [107 kB]
2020-06-08 09:07:31 DEBUG ha-relation-changed Err:4 http://ppa.launchpad.net/maas/stable/ubuntu focal Release
2020-06-08 09:07:31 DEBUG ha-relation-changed 404 Not Found [IP: 10.0.4.2 8000]
2020-06-08 09:07:31 DEBUG ha-relation-changed Get:5 http://archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB]
2020-06-08 09:07:31 DEBUG ha-relation-changed Get:6 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]
2020-06-08 09:07:33 DEBUG ha-relation-changed Reading package lists...
2020-06-08 09:07:33 DEBUG ha-relation-changed E: The repository 'http://ppa.launchpad.net/maas/stable/ubuntu focal Release' does not have a Release file.
2020-06-08 09:07:33 DEBUG ha-relation-changed Traceback (most recent call last):
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/hooks/ha-relation-changed", line 661, in <module>
2020-06-08 09:07:33 DEBUG ha-relation-changed hooks.execute(sys.argv)
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/charmhelpers/core/hookenv.py", line 943, in execute
2020-06-08 09:07:33 DEBUG ha-relation-changed self._hooks[hook_name]()
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/hooks/ha-relation-changed", line 348, in ha_relation_changed
2020-06-08 09:07:33 DEBUG ha-relation-changed setup_maas_api()
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/hooks/utils.py", line 999, in setup_maas_api
2020-06-08 09:07:33 DEBUG ha-relation-changed apt_update(fatal=True)
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/charmhelpers/fetch/ubuntu.py", line 307, in apt_update
2020-06-08 09:07:33 DEBUG ha-relation-changed _run_apt_command(cmd, fatal)
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/charmhelpers/fetch/ubuntu.py", line 768, in _run_apt_command
2020-06-08 09:07:33 DEBUG ha-relation-changed _run_with_retries(
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/var/lib/juju/agents/unit-hacluster-vault-0/charm/charmhelpers/fetch/ubuntu.py", line 748, in _run_with_retries
2020-06-08 09:07:33 DEBUG ha-relation-changed result = subprocess.check_call(cmd, env=env)
2020-06-08 09:07:33 DEBUG ha-relation-changed File "/usr/lib/python3.8/subprocess.py", line 364, in check_call
2020-06-08 09:07:33 DEBUG ha-relation-changed raise CalledProcessError(retcode, cmd)
2020-06-08 09:07:33 DEBUG ha-relation-changed subprocess.CalledProcessError: Command '['apt-get', 'update']' returned non-zero exit status 100.
2020-06-08 09:07:33 ERROR juju.worker.uniter.operation runhook.go:132 hook "ha-relation-changed" failed: exit status 1

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/734141

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/734141
Committed: https://git.openstack.org/cgit/openstack/charm-deployment-guide/commit/?id=0251a41aebd3ee339dca7298d66b3a195cb575ee
Submitter: Zuul
Branch: master

commit 0251a41aebd3ee339dca7298d66b3a195cb575ee
Author: Peter Matulis <email address hidden>
Date: Mon Jun 8 12:24:31 2020 -0400

    Add bug citation re DNS HA broken on focal

    Add a section to series-upgrade.rst for known
    series-related issues.

    Add a note to app-ha.rst; all READMEs for HA-aware
    charms point there.

    Minor drive-by formatting.

    Closes-Bug: #1882508

    Change-Id: I818827b481adb669e119843d47121be6684dd9de

[Alex Kavanagh (ajkavanagh)]

I think this is overtaken by events, thus setting to invalid; if this is still an issue, then please reset back to New and add additional supporting information.