Correctly handle unix signals in EDOT

[swiatekm]

What does this PR do?

It makes the EDOT collector handle unix signals correctly.

Why is it important?

The EDOT collector should shut down gracefully when receiving a SIGINT or SIGTERM. If it doesn't, there's potential for resources not being freed or state on disk being corrupted.

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

How to test this PR locally

Use the following configuration:

receivers: nop: exporters: nop: service: telemetry: metrics: level: none pipelines: logs: receivers: [nop] exporters: [nop]

Run the edot collector with it and send a SIGINT or SIGTERM to it. You'll see the components shut down before the collector exits.

Related issues

• Closes EDOT Collector doesn't shut down gracefully when receiving Unix signals #10956

[mergify]

This pull request does not have a backport label. Could you fix it @swiatekm? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-./d./d is the label that automatically backports to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: e0bca04

History

• 💛 Build #29754 was flaky 82b73f9
• 💛 Build #29675 was flaky 451a72b
• 💔 Build #29621 failed 66ab2db

cc @swiatekm

[github-actions]

@Mergifyio backport 8.19 9.1 9.2

[mergify]

backport 8.19 9.1 9.2

✅ Backports have been created

• #10995 [8.19] (backport #10908) Correctly handle unix signals in EDOT has been created for branch 8.19
• #10996 [9.1] (backport #10908) Correctly handle unix signals in EDOT has been created for branch 9.1
• #10997 [9.2] (backport #10908) Correctly handle unix signals in EDOT has been created for branch 9.2