openSUSE admin

Currently we monitor ICMP/ping from gateways using IP addresses, this causes the exporters to collect dual stack connections as individual hosts:

https://monitor.opensuse.org/grafana/d/pv02xrZWz/ping

To make the overview easier to read (names instead of addresses) and to have the system establish a relation between two address families on the same path we should equip the relevant addresses with either DNS names or /etc/hosts entries and then configure the exporters to use the respective names.

The exporter targets are configured in the ID pillars, for example:

https://progress.opensuse.org/projects/opensuse-admin/repository/salt/revisions/production/entry/pillar/id/asgard1_infra_opensuse_org.sls#L35

The hosts entries could be done in the respective cluster pillar (if we don't want to add a dependency on DNS for this).

When switching it over Prmetheus will start a new timeline as the metrics labels changed, causing duplicate/overlapping monitoring timelines for the duration of the retention period. We could either accept this or administratively delete the old data if it is distracting in the dashboards.