Ussuri separation of nova-cloud-controller and placement needs to be reflected in dashboard and metrics collected

[Drew Freiberger]

On bionic-ussuri clouds, the placement engine is moved out of the nova-cloud-controller application and into it's own charmed application space. Also, the nova-api logs moved to be apache WSGI logs.

Both the prometheus-grok-exporter and the grafana dashboard need to be updated to reflect these differences.

One can get some of the data in the Grok Exporter graphs by adding a relation between prometheus-grok-exporter and the placement application, but the dashboard needs to split the source hosts of the nova api logs from the source hosts of the placement api logs.

Nova-cloud-controller variable on the dashboard needs to change to be a query of nova_conductor_errors.

nova-placement variable needs to be added with the equivalent query of the current nova-cloud-controller variable.

Panels using $nova-cloud-controller need their queries to be updated to use $placement for data provided by the placement units.

[Eric Chen (eric-chen)]

This charm is no longer being actively maintained