Add feature flag for more lenient overlay resource checks by henrymercer · Pull Request #3498 · github/codeql-action

We would like to start rolling out overlay to standard Actions runners. This PR adds a feature flag to lower the disk space requirement to 14 GB, which is small enough to include the set of standard Actions runners.

Based on #3487 to avoid conflicts. We don't plan to roll this out before #3487 is merged.

Risk assessment

For internal use only. Please select the risk level of this change:

  • Low risk: Changes are fully under feature flags, or have been fully tested and validated in pre-production environments and are highly observable, or are documentation or test only.

Which use cases does this change impact?

Workflow types:

  • Advanced setup - Impacts users who have custom CodeQL workflows.
  • Managed - Impacts users with dynamic workflows (Default Setup, CCR, ...).

Products:

  • Code Scanning - The changes impact analyses when analysis-kinds: code-scanning.

Environments:

  • Dotcom - Impacts CodeQL workflows on github.com and/or GitHub Enterprise Cloud with Data Residency.

How did/will you validate this change?

  • Unit tests - I am depending on unit test coverage (i.e. tests in .test.ts files).

If something goes wrong after this change is released, what are the mitigation and rollback strategies?

  • Feature flags - All new or changed code paths can be fully disabled with corresponding feature flags.

How will you know if something goes wrong after this change is released?

  • Telemetry - I rely on existing telemetry or have made changes to the telemetry.
    • Dashboards - I will watch relevant dashboards for issues after the release. Consider whether this requires this change to be released at a particular time rather than as part of a regular release.
    • Alerts - New or existing monitors will trip if something goes wrong with this change.

Are there any special considerations for merging or releasing this change?

  • No special considerations - This change can be merged at any time.

Merge / deployment checklist

  • Confirm this change is backwards compatible with existing workflows.
  • Consider adding a changelog entry for this change.
  • Confirm the readme and docs have been updated if necessary.