If a metric doesn't exist, Grafana doesn't load a dashboard

[Alvaro Uria]

This bug is related to bug #1777280. The fix doesn't load a dashboard if there is at least a metric that is not returning data.

As wishlist, a dashboard could be loaded if there is at least a metric that is collecting data:
https://pastebin.ubuntu.com/p/Dp3jRJq9KB/

An alternative would be to create a subset of dashboards that we know would match most of the environments.

[Drew Freiberger (afreiberger)]

I've updated the code with my idea for solving this which is ensuring we have at least X percent matching metrics for a dashboard. Currently coded as 50% or greater.

https://code.launchpad.net/~afreiberger/grafana-charm/+git/grafana-charm/+merge/353664

[Chris Sanders (chris.sanders)]

I think the correct approach is the second suggesting on the description, fix the dashboards to use available metrics rather than complicating the choice of dashboards.

[Drew Freiberger (afreiberger)]

Agreed. I updated the charm to spit out all missing metrics for a skipped dashboard to the DEBUG log. Hopefully this will help speed dashboard improvement cycles. Released as cs:grafana-18