* Prevent leaking collectors when HPA gets updated
This fixes an issue where collectors would be leaking when HPAs are
getting updated.
Fix this by stopping the collector started for the previous version of
the HPA.
Signed-off-by: Mikkel Oscar Lyderik Larsen <mikkel.larsen@zalando.de>
* Add tests to verify old collector is removed
Signed-off-by: Mikkel Oscar Lyderik Larsen <mikkel.larsen@zalando.de>
Adding tests for error cases in metric_store.go. This will primarily
protect against regression.
Signed-off-by: Muhammad Muaaz Saleem <muhammad.muaaz.saleem@zalando.de>
Making metrics expiration TTL configurable globally configurable.
This is so RemoveExpired can be tested. Not making the TTL configurable
per metric yet because it could change behaviour in production.
Signed-off-by: Muhammad Muaaz Saleem <muhammad.muaaz.saleem@zalando.de>
Testing that metrics get removed once expired. Tests are failing
because metric.TTL isn't configurable at the moment
Signed-off-by: Muhammad Muaaz Saleem <muhammad.muaaz.saleem@zalando.de>
Adding test cases to insert/list/get a namespaced and a non-namespaced
resource metric
Signed-off-by: Muhammad Muaaz Saleem <muhammad.muaaz.saleem@zalando.de>
* feat: expose basic go metrics via prometheus
Signed-off-by: Martin Linkhorst <martin.linkhorst@zalando.de>
* feat: expose basic counter of successful and failed collections and updates
Signed-off-by: Martin Linkhorst <martin.linkhorst@zalando.de>
