By default, binary operators match series from the left and right side on
exactly identical label sets. But you keep the log_type label on the left,
while aggregating it away on the right. You can either aggregate it away on
both sides:
sum(type_counter{log_type="ERROR"}) / sum(type_counter)
...or ignore that label for matching:
type_counter{log_type="ERROR"} / ignoring(log_type) sum(type_counter)
Btw., I assume type_counter is a counter metric. You should typically never
care about the absolute value of a counter metric and instead always
rate(...) it (or increase(), etc.) before using.
On Tue, Jun 30, 2020 at 6:11 PM Cole Beasley <[email protected]>
wrote:
> Hi there,
>
> This might be a very basic question but I'm trying to get the ration of
> error log messages / total error messages. Using grok_exporter I have the
> metric type_counter which returns
> ElementValue
> type_counter{instance="localhost:9144",job="grok",log_type="AUTH"} 45
> type_counter{instance="localhost:9144",job="grok",log_type="ERROR"} 55
> type_counter{instance="localhost:9144",job="grok",log_type="IN"} 17603
> type_counter{instance="localhost:9144",job="grok",log_type="NESTED"} 971
> I simply then want (type_counter{log_type="ERROR"}) / (sum(type_counter)),
> but this does not return a value, this is odd to me as both
> type_counter{log_type="ERROR"} and sum(type_counter) return their expected
> values and will divide by themselves or manually entered integers (such as
> (18,000 / sum(type_counter)). I'm not sure why the division here is not
> working, any ideas?
>
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--
Julius Volz
PromLabs - promlabs.com
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