otel: add cumulativetodeltaprocessor to EDOT collector

[anuraaga]

What does this PR do?

Adds cumulativetodeltaprocessor to the EDOT collector

elastic-agent version of elastic/opentelemetry-collector-components#601

/cc @codefromthecrypt

Why is it important?

Elastic stack only supports delta metrics. The processor can be used to still ingest certain cumulative metrics such as those scraped from Prometheus endpoints.

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

Disruptive User Impact

How to test this PR locally

Can start a server exposing Prometheus metrics such as envoy and configure collector with prometheus receiver and cumulativetodelta processor to elastic apm.

[mergify]

This pull request does not have a backport label. Could you fix it @anuraaga? 🙏
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)

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b cumulativetodelta upstream/cumulativetodelta
git merge upstream/main
git push upstream cumulativetodelta

[andrzej-stencel]

I've allowed myself to add tests and update the changelog fragment.

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 139d54a

History

• 💚 Build #21947 succeeded 9b322c1
• 💚 Build #21929 succeeded c56f450
• 💔 Build #21927 failed 0025ea4

cc @anuraaga

[codefromthecrypt]

thanks @anuraaga!

[github-actions]

@Mergifyio backport 8.17 8.18 8.19 9.0

[mergify]

backport 8.17 8.18 8.19 9.0

✅ Backports have been created

Details

• #8385 [8.17] (backport #8372) otel: add cumulativetodeltaprocessor to EDOT collector has been created for branch 8.17 but encountered conflicts
• #8386 [8.18] (backport #8372) otel: add cumulativetodeltaprocessor to EDOT collector has been created for branch 8.18 but encountered conflicts
• #8387 [8.19] (backport #8372) otel: add cumulativetodeltaprocessor to EDOT collector has been created for branch 8.19
• #8388 [9.0] (backport #8372) otel: add cumulativetodeltaprocessor to EDOT collector has been created for branch 9.0 but encountered conflicts