feature: support HPA for STS

[vhajdukd]

Chart name and version, where you feel a lack of requested feature chart: victoria-metrics-agent version: v0.12.1

Is your feature request related to a problem? Please describe. Allow statefulset to be configured as the target for hpa. One may want to retain tmp queue for gracefulshutdowns during for example image tag changes / upgrades to pods.

Describe the solution you'd like Allow statefulset to be configured as the target for hpa.

Describe alternatives you've considered Deployment won't fulfil that role as emptyDir will be cleaned (tmp queue) on pods rollout.

Additional context This is to facilitate this part of the documentation:

• https://docs.victoriametrics.com/vmagent/#disabling-on-disk-persistence

  vmagent still may write pending in-memory data to -remoteWrite.tmpDataPath on graceful shutdown if -remoteWrite.disableOnDiskQueue command-line flag is specified. It may also read buffered data from -remoteWrite.tmpDataPath on startup.

[AndrewChubatiuk]

hey @vhajdukd how are you going to use HPA with VMAgent?

[vhajdukd]

Thanks for the fast fix. How we use it ? - This is in case there will be a surge in traffic (ppl are sending to our vmagents) and queue will build up before rollout of new version.

This is to not lose single scrape metrics (its not running in clusterMode).

[AndrewChubatiuk]

starting the next release HPA will target StatefulSet if you have horizontalPodAutoscaler.enabled: true and statefulset.enabled: true

[vhajdukd]

When can I expect the release of "0.14.4" ?

[AndrewChubatiuk]

It's already available