Apache fails to start with "could not bind" / "address already in use"

[Aurelien Lourot]

Probably rare / hard to reproduce. Seen on OSCI [0]:

juju status:
ceilometer/0 blocked idle [...] Services not running that should be: apache2

/var/log/apache2/error.log:
(98)Address already in use: AH00072: make_sock: could not bind to address [::]:8767
(98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:8767
[Mon May 25 06:27:08.936859 2020] [mpm_event:alert] [pid 17257:tid 140540186515328] no listening sockets available, shutting down

Happening after removing the designate-memcached relation in this test. [1]

0: http://10.245.162.58:8080/view/MojoMatrix/job/mojo_runner/22588/
1: https://github.com/openstack-charmers/openstack-mojo-specs/blob/master/helper/setup/add-certs.py#L135

[Alex Kavanagh (ajkavanagh)]

Setting to incomplete; there have been no new reports in 3 years. This bug will expire in 60 days; however, if it is still an issue then please re-open the bug and add additional supporting information.

[Launchpad Janitor (janitor)]

[Expired for OpenStack Ceilometer Charm because there has been no activity for 60 days.]