logstash health api: expose `GET /_health_report` with pipelines/*/up probe

health api: expose `GET /_health_report` with pipelines/*/up probe

Open yaauie opened this issue 1 year ago • 1 comments

Release notes

What does this PR do?

Adds the base framework for a health report API as-described in #16056, including the basic per-pipeline up probe.

Why is it important/What is the impact to the user?

Users are best served with actionable insights into what is going on in the Logstash process, and this bootstrap adds an API endpoint to start providing value to that end.

Checklist

[x] My code follows the style guidelines of this project
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation
~~[ ] I have made corresponding change to the default configuration files (and/or docker env variables)~~
[ ] I have added tests that prove my fix is effective or that my feature works

How to test this PR locally

Build Logstash
Start Logstash with a variety of pipelines, some of which exit when complete, others that take significant time to load, etc
Query the health API endpoint curl --silent -XGET http://localhost:9600/_health_report