FIX #42 - Downscaling Loki wipes its configuration

[Abuelodelanada]

Issue

See #42

Solution

Now we are no longer checking the event type, we are only checking if we have loki_endpoints provided by the Provider side of the relation

Context

Testing Instructions

1. Deploy grafana-agent
2. Deploy 3 loki units
3. Relate both charms juju add-relation grafana-agent loki
4. Down scale Loki juju scale-application loki 2
5. Verify that loki section in grafana-agent config file is NOT empty: juju ssh --container agent agent/0 cat /etc/agent/agent.yaml

Release Notes

[github-actions]

Libraries are not up to date with their remote counterparts. If this was
not intentional, run charmcraft fetch-libs and commit the updated libs
to your PR branch.

stdout

Library charms.observability_libs.v0.kubernetes_service_patch was already up to date in version 0.6.                                                           
Library charms.prometheus_k8s.v0.prometheus_scrape was already up to date in version 0.17.                                                                     
Library charms.loki_k8s.v0.loki_push_api updated to version 0.10.              
Library charms.prometheus_k8s.v0.prometheus_remote_write updated to version 0.3.                                                                               

stderr

[mmanciop]

I’d like to see a cleanup of the excessive mocking in the tests. The rest LGTM.

[mmanciop]

.

[github-actions]

Libraries are not up to date with their remote counterparts. If this was
not intentional, run charmcraft fetch-libs and commit the updated libs
to your PR branch.

stdout

Library charms.loki_k8s.v0.loki_push_api was already up to date in version 0.10.                                                                               
Library charms.observability_libs.v0.kubernetes_service_patch was already up to date in version 0.6.                                                           
Library charms.prometheus_k8s.v0.prometheus_remote_write updated to version 0.4.                                                                               
Library charms.prometheus_k8s.v0.prometheus_scrape updated to version 0.19.    

stderr

[github-actions]

Libraries are not up to date with their remote counterparts. If this was
not intentional, run charmcraft fetch-libs and commit the updated libs
to your PR branch.

stdout

Library charms.loki_k8s.v0.loki_push_api has local changes, cannot be updated. 
Library charms.observability_libs.v0.kubernetes_service_patch was already up to date in version 0.6.                                                           
Library charms.prometheus_k8s.v0.prometheus_remote_write updated to version 0.4.                                                                               
Library charms.prometheus_k8s.v0.prometheus_scrape updated to version 0.19.    

stderr

[simskij]

Tests currently failing. Waiting to do a final review until it passes again.

[github-actions]

Libraries are not up to date with their remote counterparts. If this was
not intentional, run charmcraft fetch-libs and commit the updated libs
to your PR branch.

stdout

Library charms.loki_k8s.v0.loki_push_api has local changes, cannot be updated. 
Library charms.observability_libs.v0.kubernetes_service_patch was already up to date in version 0.6.                                                           
Library charms.prometheus_k8s.v0.prometheus_remote_write updated to version 0.4.                                                                               
Library charms.prometheus_k8s.v0.prometheus_scrape updated to version 0.19.    

stderr

[github-actions]

Libraries are not up to date with their remote counterparts. If this was
not intentional, run charmcraft fetch-libs and commit the updated libs
to your PR branch.

stdout

Library charms.loki_k8s.v0.loki_push_api has local changes, cannot be updated. 
Library charms.observability_libs.v0.kubernetes_service_patch was already up to date in version 0.6.                                                           
Library charms.prometheus_k8s.v0.prometheus_remote_write updated to version 0.4.                                                                               
Library charms.prometheus_k8s.v0.prometheus_scrape updated to version 0.19.    

stderr