Cron Scaler to Scale the deployments as per a particular cron schedule.

[ckuduvalli]

A clear and concise description of what scaler you'd like to use and how you'd want to use it:

Cron scaler is being developed in order to scale the deployments based on a particular time schedule. Whenever the currentTimestamp is inbetween a start and endTime, we say the scaler is active and inactive in all other times.

• Scaler Source: Deployment replicas from the k8s deployment in the namespace itself.
• How do you want to scale: The cron scaler will scale the pods to the desiredReplicas when the scaler is active. By Active, I mean the timestamp should be between the start and end time specified in the metadata. All the other times, the replicas will be equal to the minReplicaCount
• Authentication: None

[ckuduvalli]

By scaler source, I understand something like kafka topic, rabbitmq etc. Please correct me if I am wrong.

[zroubalik]

@ckuduvalli yeah scaler source, is the source of the events, as you mentioned eg. kafka topic..)
In this case, I suppose the source would be the cron implementation itself?

There's community call this Thursday https://keda.sh/community/, you can join and we can discuss it.

[ckuduvalli]

@zroubalik I have a question regarding my scaler. I implemented a cron scaler. What I am observing is that keda passes the metric to scale up to some value x, but HPA is scaling to some value less than x due to CPU utilization taking over. Is there a way I can have my scaler override the HPA?

As per the documentation, I see that HPA should scale the replicas to max of the 2 metrics
https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/#support-for-multiple-metrics

[ckuduvalli]

@ckuduvalli yeah scaler source, is the source of the events, as you mentioned eg. kafka topic..)
In this case, I suppose the source would be the cron implementation itself?

There's community call this Thursday https://keda.sh/community/, you can join and we can discuss it.

Sure.. I will join the call on Thursday

[balchua]

This is interesting and at the same time it doesn't need hpa to determine how many to scale to. Similar to ScaledJob.

[ckuduvalli]

This is interesting and at the same time it doesn't need hpa to determine how many to scale to. Similar to ScaledJob.

This happened due to my misunderstanding of the metric. Will discuss over the call today.

[tomkerkhove]

Good idea for a scaler if you ask me!