use labels of one metric as labels of another metric

[nesa...@gmail.com]

Hi

I would like to get all instance labels on the below query having the label role="master":

redis_instance_info

and use it as input of instance label on the below query:

redis_keyspace_hits_total

so that I can get hit ratio of master redises.

How can I do this?

[Ben Kochie]

This is what group_left is useful for. For example:

redis_keyspace_hits_total * on (job, instance) group_left (redis_version)  redis_instance_info

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