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https://issues.apache.org/jira/browse/AIRFLOW-5508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931114#comment-16931114
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ASF GitHub Bot commented on AIRFLOW-5508:
-----------------------------------------
mikedias commented on pull request #6131: [AIRFLOW-5508] Add a whitelist
mechanism for the StatsD metrics (1.10)
URL: https://github.com/apache/airflow/pull/6131
**This PR is a backport of #6130 to `v1-10-stable` branch**
### Jira
- [x] My PR addresses the following [Airflow
Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references
them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR"
- https://issues.apache.org/jira/browse/AIRFLOW-5508
### Description
- [x] Here are some details about my PR, including screenshots of any UI
changes:
Sometimes we don't need that all available metrics be sent to StatsD server
when only a particular subset is relevant (e.g. scheduler or pool).
One of the reasons for filtering out metrics is because some of them are
based on dag ids, creating high cardinality metrics in the StatsD server,
leading into scalability issues in an environment with many dags.
This PR introduces the ability to control which metrics should be sent via
whitelisting the metrics prefixes, keeping the default behavior of sending all
if not specified.
### Tests
- [x] My PR adds the following unit tests:
- `tests.test_stats.TestStatsWithWhitelist`
### Commits
- [x] My commits all reference Jira issues in their subject lines, and I
have squashed multiple commits if they address the same issue. In addition, my
commits follow the guidelines from "[How to write a good git commit
message](http://chris.beams.io/posts/git-commit/)":
1. Subject is separated from body by a blank line
1. Subject is limited to 50 characters (not including Jira issue reference)
1. Subject does not end with a period
1. Subject uses the imperative mood ("add", not "adding")
1. Body wraps at 72 characters
1. Body explains "what" and "why", not "how"
### Documentation
- [x] In case of new functionality, my PR adds documentation that describes
how to use it.
- All the public functions and the classes in the PR contain docstrings
that explain what it does
- If you implement backwards incompatible changes, please leave a note in
the [Updating.md](https://github.com/apache/airflow/blob/master/UPDATING.md) so
we can assign it to a appropriate release
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> Whitelist mechanism for StatsD metrics
> --------------------------------------
>
> Key: AIRFLOW-5508
> URL: https://issues.apache.org/jira/browse/AIRFLOW-5508
> Project: Apache Airflow
> Issue Type: New Feature
> Components: scheduler
> Affects Versions: 1.10.5
> Reporter: Mike Dias
> Assignee: Mike Dias
> Priority: Minor
>
> Sometimes we don't need that all available metrics be sent to StatsD server
> when only a particular subset is relevant (e.g. scheduler or pool).
> One of the reasons for filtering out metrics is because some of them are
> based on dag ids, creating high cardinality metrics in the StatsD server,
> leading into scalability issues in an environment with many dags.
> This feature aims to give the users the ability to control which metrics
> should be sent via whitelisting, keeping the default behavior of sending all
> if not specified.
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