Related to prometheus query

[dikshant rai]

Hi,

I am trying to create custom dashboard from prometheus logs but not getting as expected I am trying to count them. below is the script I am using but I am getting zero.

count(http_server_requests_seconds_count{application="marketplace-service", uri="/marketplace/live/bid/{auctionId}"})

Below is the 1 line log and I wanted to achieve that if uri, method and application matches, it should count as 1.

"http_server_requests_seconds_count{application="marketplace-service",exception="None",method="GET",outcome="SUCCESS",status="200",uri="/actuator/prometheus",} ""

[Brian Candler]

Firstly, I suggest you use the PromQL query browser within the Prometheus web interface to test your expressions.

Secondly, I suggest you build them up in stages.  Try the inner query first; when that's working as you expect then add to the query.

Therefore, I suggest you try this query first:

    http_server_requests_seconds_count{application="marketplace-service", uri="/marketplace/live/bid/{auctionId}"}

I expect it will return zero results unless the query uri is literally the string "/marketplace/live/bid/{auctionId}" - because that's what you asked to match.  If so, that's why the count of timeseries is zero.

What I *guess* you probably want is a query like this:

    http_server_requests_seconds_count{application="marketplace-service", uri=~"/marketplace/live/bid/.+"}

That's a regular expression pattern match, where . means "any character" and + means "1 or more times".  That should return one or more results (as long as there are some with uri that match).  OK so far?

Then, I wonder what you mean by a "count".  If you put count(...) around this expression, then it will work, but you will get a single value which is the *number of timeseries*, ignoring their values.  That is, the number of distinct uri's that are seen.

But each of these timeseries is itself a counter.  So maybe what you want is to put sum(...) around this expression, to get the total of the counts?

    sum(http_server_requests_seconds_count{application="marketplace-service", uri="/marketplace/live/bid/.+"})

Only you can decide if that's what you want, because only you know what you're trying to show from these metrics.

I hope that helps - good luck!

[dikshant rai]

Hi Brian,

Thanks for such clarification. This is a sample one. We want to monitor much time http_server_requests_seconds_count is being hit with keeping application="marketplace-service", uri="/marketplace/live/bid/{auctionId} as filter and every time a post request is being made it can be count as 1,2,3 and so on. We will only change the uri in filter rest things are same.