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https://issues.apache.org/jira/browse/SOLR-10654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17865247#comment-17865247
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Chris M. Hostetter commented on SOLR-10654:
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{quote}In the PR, I have a regex to try and remove some of the JVM
implementations but seems as it's not enough.
{quote}
For {{{}TestPrometheusResponseWriter{}}}...
You need to just plain kill the "equals" assertion against
{{solr-prometheus-output.txt}} ... no matter how many regex tricks you try,
that's way to brittle to survive future additions/tweaks to the metrics solr
supports. The test needs to parse the "actual" response and make some basic
assertions about the _structure_ it finds, and if there are certain metrics
that should *always* be present, assert they exist with values that are _valid_
(ie: can be parsed as an int, or can be parsed as a float) w/o asserting
exactly what those values are.
But under no circumstances should you assert that you know the full list of
every metrics that _might_ someday exist in solr/jetty.
(this would also be a good place register dummy metrics with fake names that
you can easily assert have _specific_ expect values)
For {{MetricsHandlerTest.testPrometheusMetricsJvm}}...
{code}
s/assertEquals(0, /assertNotNull(/
{code}
> Expose Metrics in Prometheus format DIRECTLY from Solr
> ------------------------------------------------------
>
> Key: SOLR-10654
> URL: https://issues.apache.org/jira/browse/SOLR-10654
> Project: Solr
> Issue Type: Improvement
> Components: metrics
> Reporter: Keith Laban
> Priority: Major
> Attachments: prometheus_metrics.txt
>
> Time Spent: 7h 20m
> Remaining Estimate: 0h
>
> Expose metrics via a `wt=prometheus` response type.
> Example scape_config in prometheus.yml:
> {code:java}
> scrape_configs:
> - job_name: 'solr'
> metrics_path: '/solr/admin/metrics'
> params:
> wt: ["prometheus"]
> static_configs:
> - targets: ['localhost:8983']
> {code}
> [Rationale|https://issues.apache.org/jira/browse/SOLR-11795?focusedCommentId=17261423&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17261423]
> for having this despite the "Prometheus Exporter". They have different
> strengths and weaknesses.
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