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Chapter 4. HTTP metrics

The Micrometer extension automatically times HTTP server requests. Following Prometheus naming conventions for timers, look for http_server_requests_seconds_count, http_server_requests_seconds_sum, and http_server_requests_seconds_max. Dimensional labels have been added for the requested uri, the HTTP method (GET, POST, etc.), the status code (200, 302, 404, etc.), and a more general outcome field. 

# HELP http_server_requests_seconds
# TYPE http_server_requests_seconds summary
http_server_requests_seconds_count{env="test",method="GET",outcome="SUCCESS",registry="prometheus",status="200",uri="/example/prime/{number}",} 6.0
http_server_requests_seconds_sum{env="test",method="GET",outcome="SUCCESS",registry="prometheus",status="200",uri="/example/prime/{number}",} 0.007355093
http_server_requests_seconds_count{env="test",method="GET",outcome="SUCCESS",registry="prometheus",status="200",uri="/example/gauge/{number}",} 4.0
http_server_requests_seconds_sum{env="test",method="GET",outcome="SUCCESS",registry="prometheus",status="200",uri="/example/gauge/{number}",} 0.005035393
# HELP http_server_requests_seconds_max
# TYPE http_server_requests_seconds_max gauge
http_server_requests_seconds_max{env="test",method="GET",outcome="SUCCESS",registry="prometheus",status="200",uri="/example/prime/{number}",} 0.002110405
http_server_requests_seconds_max{env="test",method="GET",outcome="SUCCESS",registry="prometheus",status="200",uri="/example/gauge/{number}",} 0.00239441
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Ignoring endpoints

You can disable measurement of HTTP endpoints using the quarkus.micrometer.binder.http-server.ignore-patterns property. This property accepts a comma-separated list of simple regex match patterns identifying URI paths that should be ignored. For example, setting quarkus.micrometer.binder.http-server.ignore-patterns=/example/prime/[0-9]+ will ignore a request to http://localhost:8080/example/prime/7919. A request to http://localhost:8080/example/gauge/7919 would still be measured.

URI templates

The Micrometer extension will make a best effort at representing URIs containing path parameters in templated form. Using examples from above, a request to http://localhost:8080/example/prime/7919 should appear as an attribute of http_server_requests_seconds_* metrics with a label of uri=/example/prime/{number}.

Use the quarkus.micrometer.binder.http-server.match-patterns property if the correct URL can not be determined. This property accepts a comma-separated list defining an association between a simple regex match pattern and a replacement string. For example, setting quarkus.micrometer.binder.http-server.match-patterns=/example/prime/[0-9]+=/example/{jellybeans} would use the value /example/{jellybeans} for the uri attribute any time the requested uri matches /example/prime/[0-9]+.

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