Prometheus + Grafana trouble with templating

Question

In Grafana make template:

Name - Instance
Query - label_values(instance) 
for recive all instance.
And have reqest example:
sum(machine_cpu_cores) by (instance)

If sum(machine_cpu_cores) by (instance=~"$Instance") I have error. How do it right? Thanks.

Answer 1

Most likely that you've misplaced the =~ operator.

The correct query should look like this:

sum(machine_cpu_cores{instance=~"$Instance"}) by (instance)