mlbiscoc opened a new pull request, #2405: URL: https://github.com/apache/solr/pull/2405
https://issues.apache.org/jira/browse/SOLR-10654 **This is currently a draft PR. Unit tests have not been written yet. PR created to get feedback on current implementation** # Description Introduce a new Prometheus response writer `/solr/admin/metrics?wt=prometheus` to output Solr Core registry metrics directly from Solr. Output looks similar to the prometheus exporter. This is only `solr.core` registry. Other registry planned to be outputted in future PRs. Output example: [cloud.txt](https://github.com/apache/solr/files/15013185/cloud.txt) [standalone.txt](https://github.com/apache/solr/files/15013186/standalone.txt) # Solution Currently, Solr metrics are collected by Dropwizard and differentiated by metric names. This is an anti-pattern to Prometheus. Manually export Dropwizard Solr core registry metrics into a prometheus registry and parse out the labels from the metric name to be added to prometheus metrics. **NOTE: Not all metrics are possible to convert to Prometheus such as Dropwizard string metrics. This is because Prometheus does not non-numeric types** # Tests Draft PR. Tests have not been written yet. Will update accordingly. # Checklist Please review the following and check all that apply: - [x] I have reviewed the guidelines for [How to Contribute](https://github.com/apache/solr/blob/main/CONTRIBUTING.md) and my code conforms to the standards described there to the best of my ability. - [x] I have created a Jira issue and added the issue ID to my pull request title. - [x] I have given Solr maintainers [access](https://help.github.com/en/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork) to contribute to my PR branch. (optional but recommended) - [x] I have developed this patch against the `main` branch. - [x] I have run `./gradlew check`. - [ ] I have added tests for my changes. - [ ] I have added documentation for the [Reference Guide](https://github.com/apache/solr/tree/main/solr/solr-ref-guide) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@solr.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@solr.apache.org For additional commands, e-mail: issues-h...@solr.apache.org
