Fix apiserver calculations not matching `resource` correctly

[jalev]

The current behaviour of scope=~"resource|" does not match anything even if there is a resource label, and so will always return vector(0). This makes the calculations go into negative numbers which makes the availability numbers return a value >1 :

When you change the matcher to scope="resource" :

This is also true for other things with the scope=~"resource|". E.g. the error burndown:

and after fixing the query:

[lorenzofelletti]

Hi @jalev this is weird as in my case scope=~"resource|" matches exactly both when the scope label equals resource and when it is empty. I'm experiencing a greater than 100% availability sporadically too, though I've tracked it down to a difference between cluster_verb_scope_le:apiserver_request_sli_duration_seconds_bucket:increase30d{le="+Inf"} and cluster_verb_scope:apiserver_request_sli_duration_seconds_count:increase30d, while they should be equal (still I am not sure of the issue, but it might be related to this one here. Did you check this is not your case too?

[jalev]

I'll take a look and come back 👍

[github-actions[bot]]

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