NRPE dashboard not available

[peppepetra]

Bug Description

When relating cos-proxy to grafana-k8s on grafana-dashboard relation, the charm goes into blocked state and the nrpe dashboard is not added to grafana

To Reproduce

1. juju consume cos-microk8s-localhost:admin/cos.grafana-dashboards cos-grafana-dashboards
2. juju relate cos-grafana-dashboards cos-proxy-monitors

Environment

cos-proxy rev. 52 channel edge
grafana-k8s rev. 93 channel edge

Relevant log output

$ juju status cos-proxy-monitors
...
Unit                   Workload  Agent  Machine    Public address  Ports  Message
cos-proxy-monitors/5*  blocked   idle   17/lxd/25  10.243.165.135         Missing one of (Grafana|dashboard) relation(s)
...

$ juju status --relations | grep cos-proxy-monitors
cos-proxy-monitors             n/a          blocked          1  cos-proxy                      edge      52  no       Missing one of (Grafana|dashboard) relation(s)
cos-proxy-monitors/5*              blocked      idle   17/lxd/25  10.243.165.135                                           Missing one of (Grafana|dashboard) relation(s)
cos-proxy-monitors:downstream-grafana-dashboard                      cos-grafana-dashboards:grafana-dashboard                      grafana_dashboard        regular      
cos-proxy-monitors:downstream-prometheus-scrape                      cos-scrape-interval-config-monitors:configurable-scrape-jobs  prometheus_scrape        regular      
nrpe-container:monitors                                              cos-proxy-monitors:monitors                                   monitors                 regular      
nrpe-controller:monitors                                             cos-proxy-monitors:monitors                                   monitors                 regular      
nrpe-host:monitors                                                   cos-proxy-monitors:monitors                                   monitors                 regular      
nrpe-maas-infra:monitors                                             cos-proxy-monitors:monitors                                   monitors                 regular

Additional context

No response

[lucabello]

We should verify if this happens with the latest edge revision 58, and if so we need to investigate further :)

[przemeklal]

It seems that nrpe.json file isn't used in any way by the charm code.

It would be cool if it showed up in Grafana if:
a) cos-proxy is related to NRPE using the monitors relations
b) cos-proxy is related to COS Grafana

cc: @sed-i

[sed-i]

The reference deployment by @przemeklal is as follows:

graph LR

subgraph openstack
nrpe-* --- cos-proxy-monitors
end

subgraph cos
prom-scrape-config --- prometheus
grafana
end

cos-proxy-monitors --- prom-scrape-config
cos-proxy-monitors --- grafana

Loading

While alert rules and metrics show up in prometheus as expected, no dashboards show up in grafana.
In fact,

• no dashboards are present on the relation data to grafana
• cos-proxy is instantiating GrafanaDashboardAggregator, not Provider, and afaiu, it does not read any dashboards from ./src/grafana_dashboards.

@lucabello, do you recall how your deployment looked like in #57? It seems like you were able to see the dashboard on grafana side fine.

[lucabello]

I don't really remember, but I think the setup was the same.

[sed-i]

@peppepetra sorry for dropping the ball on this one, but is this still an issue?