[master] feat(functional): add util container to support vector move to ubi-micro

[openshift-cherrypick-robot]

This is an automated cherry-pick of #3438

/assign jcantrill

Summary by CodeRabbit

• Tests
  • Improved functional test reliability by introducing a dedicated utility container for HTTP requests and metrics queries.
  • Updated metrics, API, output, and discarded-metrics tests to run diagnostic commands through the utility container.
  • Added a long-running utility environment based on a stable UBI image for functional test execution.

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📥 Commits

Reviewing files that changed from the base of the PR and between edd266b and 7721464.

📒 Files selected for processing (7)

• test/framework/functional/framework.go
• test/framework/functional/metrics.go
• test/framework/functional/write.go
• test/functional/metrics/discarded_metrics_test.go
• test/functional/metrics/metrics_test.go
• test/functional/misc/vector_api_cli_test.go
• test/functional/outputs/splunk/403_forbidden_test.go

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📝 Walkthrough

Walkthrough

The functional test framework adds a long-running UBI utility container. Metric collection, HTTP input writes, health checks, and related functional tests now execute curl commands in this container.

Changes

Functional test utility container

Layer / File(s)	Summary
Utility container setup test/framework/functional/framework.go	Defines utility container constants and adds a long-running UBI utility container with IfNotPresent image pulling.
Command routing through the utility container test/framework/functional/metrics.go, test/framework/functional/write.go, test/functional/metrics/*, test/functional/misc/vector_api_cli_test.go, test/functional/outputs/splunk/403_forbidden_test.go	Routes metric, HTTP input, and health-check curl commands through functional.UtilContainerName instead of the collector container.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 77214

This change is merge-ready after normal checks and review; no actionable merge-blocking risk remains.

Suggested reviewers: jcantrill, vparfonov

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description states that this is an automated cherry-pick and assigns an approver, but it does not provide the mandatory change summary, reviewer assignment, or required links section.	Add a concise description of the intent, context, rationale, and implementation. Add at least one /cc reviewer from the top-level OWNERS file. Include the Links section with applicable dependent PR, GitHub issue, JIRA, or enhancement propos…

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: adding a functional-test utility container to support moving Vector to UBI Micro.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 7…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Description check

Resolution

Add a concise description of the intent, context, rationale, and implementation. Add at least one /cc reviewer from the top-level OWNERS file. Include the Links section with applicable dependent PR, GitHub issue, JIRA, or enhancement proposal references.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 7 files.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[jcantrill]

/retest

[jcantrill]

/approve
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill, openshift-cherrypick-robot

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[jcantrill]

/retest

[jcantrill]

/label verified

[openshift-ci]

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