docs: add link to RH docu VictoriaMetrics

[schwesig]

3.2. Exporting metrics to external endpoints

[schwesig]

@larsks thanks; I first didn't think a small chapter would be fair to "block" the headline. But we don't have any other links yet, so this makes sense. I am using your idea.

[larsks]

I think the link to https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.9/html/observability/using-observability#exporting-metrics-to-external-endpoints doesn't really explain what VictoriaMetrics is. Maybe the link should go to https://victoriametrics.com/products/open-source/ instead?

Also, I am having a hard time parsing the description:

VictoriaMetrics offers an option it is configured to go to a Backup Object Bucket, and on the infra side, the metrics go to a separate metrics bucket with retention.

There are some grammar and clarity problems that need correcting there. I'm unable to offer a suggestion because I'm not entirely clear what this sentence is trying to say.

[schwesig]

I think the link to https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.9/html/observability/using-observability#exporting-metrics-to-external-endpoints doesn't really explain what VictoriaMetrics is. Maybe the link should go to https://victoriametrics.com/products/open-source/ instead?

yes, I was thinking this, ... without opening a whole bucket and adding links to all mentioned services, apps, and operators.

[schwesig]

Let me go through the text with Jeet and Harshil later and clarify a few things to make it easier to understand.

[larsks]

I've pushed up some suggested formatting changes. This doesn't address the language.

[schwesig]

@larsks thanks for all the links. I added some more benefits using VictoriaMetrics in the doc. I hope this answers the why a little bit better.