[Bug]: [Dashboard] USE Method / Node(Windows) wrong queries for multiple choices variable (instance)

[mkozikowsk]

What happened?

Queries expect the single value for instance varaible:
For example query from the CPU Utilisation panel:
node:windows_node_cpu_utilisation:avg1m{cluster="$cluster", instance="$instance"}

Grafana automatically constructs the value1|...|valueN regexp for the $instance variable so the query should look like this:

node:windows_node_cpu_utilisation:avg1m{cluster="$cluster", instance=~"$instance"}

=~: Select labels that regex-match the provided string

Please provide any helpful snippets.

No response

What parts of the codebase are affected?

Dashboards

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[skl]

Thanks for raising @mkozikowsk! I see 16 matches for instance=" in dashboards/windows.libsonnet, which means there are a bunch of panels expecting only a single instance value.

Seems to me that either the instance dashboard variable needs multi-select disabling or all of these panels should be updated to handle multiple instances. If the latter, the queries need to be checked as some aggregations probably need labels adding (e.g. cluster and/or instance).

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