On 06.08.21 15:19, Laurent Dumont wrote:
>
> I have the following metrics (removed some labels)
>
> potato{short_hostname="qasite1-compute001",site="qasite1",hardware="hardwaretype1"}
> 1
> potato{short_hostname="qasite1-compute001",site="qasite1",hardware="hardwaretype2"}
> 1
> carrot{short_hostname="qasite1-compute001",site="qasite1",type="running_carrots"}
> 0
> carrot{short_hostname="qasite1-compute001",site="qasite1",type="running_carrots"}
> 5
>
> The goal is to "merge" these two metrics to allow some cross queries where
>
> - our common label is short_hostname
Which means you have to specify `on(short_hostname)` after the binary
operator.
This might get you into cases where there is no unique match
possible. In this case, you add `group_left` or `group_right` to mark
the side with the higher cardinality.
If both sides have a cardinality of more than one for that label, then
no match on just that label is possible.
In your example above, `potato` has cardinality 2. The two lines for
`carrot` are actually for the same metric. (They have exactly the same
label set.)
> - for all short_hostname values, I want to check the value of the
> "hardware" label and get the value of the "carrot" metric only if the label
> "hardware" in "potato" is equal to "hardwaretype1"
That's actually easy:
carrot and on(short_hostname) potato{hardware="hardwaretype1"}
> - Furthermore, I want to also validate that the resulting metric value
> of "carrot" is equal to 0 (not a label in this case)
carrot==0 and on(short_hostname) potato{hardware="hardwaretype1"}
--
Björn Rabenstein
[PGP-ID] 0x851C3DA17D748D03
[email] [email protected]
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