How to combine list of labels in grafana dashboard

Question

I have labels coming from two resources

label_values(aws_lambda_info{a="a", b="b"}, a)

and

label_values(s3{a="a", b="b"}, a)

How can I combine these two label sources into one.

Answer 1

You must use a query and extract the label values with a regex

I would be something like

Query: query_result(aws_lambda_info OR s3)
Regex: /a="([^"]+)"/

Have look at Grafana documentation for Prometheus source, it is rather well written.