Provide capability to get configuration from outside of scaledjob/scaledobject to configure triggers

[tomkerkhove]

Proposal

Provide capability to get configuration from outside of scaledjob to configure triggers in a consistent manner across scalers.

Open requests:

• Get from config map: Allow configMapRef in the Trigger metadata #5229
• Get from environment variables: TriggerAuthentication Vault Integration default values #4965

Use-Case

No response

Is this a feature you are interested in implementing yourself?

No

Anything else?

No response

[zroubalik]

Just my thoughts on this:

1. Introduce a TriggerMetadata CRD that can be referenced in ScaledObject the same way TriggerAuth, so trigger config can be shared across mutliple SOs/SJs. Though I am not sure if is any beneficial after all 😄 Is this really a use case? I think that usually you would like to modify the trigger settings per SO/SJ or scaleTarge
2. Global configuration, where defaults can be set on a cluster/namespace level. A ConfigMap? Probably done via webhooks, if a value is not set in the trigger, then it will be added from the global config. To be able to implement this in a reasonable way, we would imho need to refactor trigger config handling.

[tomkerkhove]

^ @arapulido here is what you are looking for, but we probably need a design and samples of what it would look like

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed due to inactivity.

[panditha]

I am also looking for a global settings (may be a configmap) where we can customise the default values. For example I am looking for setting default polling interval to a value (other than 30 seconds) globally which will be applied on each scalars that don't explicitly define a polling interval. I think this is very common pattern/practice in Kubernetes to have global configmap to customise default settings.