Check for services listening on ports assumes the service listen on 0.0.0.0

[Frode Nordahl]

In some circumstances they don't, and it would be great to be able to monitor them regardless.

The offending code appears to live in charm-helpers:
https://github.com/juju/charm-helpers/blob/85566f060626d75d991e4764c031511b625fd641/charmhelpers/contrib/openstack/utils.py#L1105

https://github.com/juju/charm-helpers/blob/85566f060626d75d991e4764c031511b625fd641/charmhelpers/contrib/openstack/utils.py#L1139

[Stamatis Katsaounis (skatsaounis)]

Hi all,

The problem occurs when HTTPS is not set, thus the charm uses HTTP only. When this is the case, this line here: https://opendev.org/openstack/charms.openstack/src/branch/master/charms_openstack/adapters.py#L921

makes the IP being set to self.local_address instead of '0.0.0.0'.

By changing to HTTPS, this is correctly set to '0.0.0.0' and the check is successful. To be able to configure HTTPS though, you have to merge my patch, which is a BUG fix. See relevant ticket and patch here:

https://bugs.launchpad.net/charm-watcher/+bug/1903583
https://review.opendev.org/#/c/761980/

Kind regards,
Stamatis