Metrics: Add more automated syncPolicy labels to argocd_app_info metric

[Indransh]

Summary

Add more labels to the argocd_app_info metric to reflect the individual automated syncPolicy config. At the moment, this metric has a single autosync_enabled label that is set if spec.syncPolicy.automated != nil.

Motivation

In some cases (e.g. outage situations) it is required to disable autosync for short periods. This is achievable by adding /spec/syncPolicy/automated to ignoreDifferences (or ignoreApplicationDifferences). By design, this has the downside that ArgoCD won't show a diff when autosync is disabled for an Application and users must remember to re-enable it later.

With the argocd_app_info metric, alerts can be triggered using the autosync_enabled label only when autosync is completely disabled for an Application, this enhancement proposal is to add additional labels so alerts can also be triggered if autosync is partially disabled.

Proposal

Add the following labels to the argocd_app_info metric:

• autosync_prune_enabled
• autosync_self_heal_enabled
• autosync_allow_empty_enabled

[Indransh]

I'd be interested in submitting a PR if I can get a go-ahead from the project maintainers.

[andrii-korotkov-verkada]

Seems reasonable to me. Feel free to bring up at the next contributors meeting.