What's the proper pipeline JSON processor syntax to parse "cloud.region" from attributes into attributes.region? Tried quotes, etc. Not having much luck. Thanks.

@Raj Kamal can you help here ?

I've figured it out. See doc.

If a field contains a dot in it, a field can alternatively use bracket syntax for traversing through a map. For example, to select the key k8s.cluster.name on the entry's body, you can use the field body["k8s.cluster.name"].