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canonical / mysql-k8s-operator

A Charmed Operator for running MySQL on Kubernetes
https://charmhub.io/mysql-k8s
Apache License 2.0
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DPE-2352 Start mysqld-exporter on COS relation and restart upon monitoring password change #274

Closed shayancanonical closed 1 year ago

shayancanonical commented 1 year ago

Issue

  1. We are always running the mysqld-exporter, even if the relation with COS does not exist
  2. We are not restarting mysqld-exporter when the password for the monitoring user changes

Solution

  1. Disable/stop the mysql-exporter pebble service when no relation to COS exists. When a relation is formed, run the mysqld-exporter sservice
  2. Replan the pebble services upon monitoring user password changes (to run mysqld-exporter with the most up to date password)