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CHANGELOG.md

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CHANGELOG.md

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Changelog

[Unreleased]

Added

  • JIT (Just-In-Time) runner support via new use-jit input (default: false). JIT runners use GitHub's generate-jitconfig API, skip config.sh, and auto-deregister after completing one job.
  • New runner-group-id input for specifying the runner group when using JIT mode (default: 1).
  • Validation: use-jit and run-runner-as-service cannot be used together (JIT is single-use).
  • New runner-debug input (default: false) for verbose debug logging. When enabled, injects detailed echo statements into the setup script and polls EC2 serial console output during runner registration. Requires ec2:GetConsoleOutput IAM permission.
  • New availability-zones-config input for multi-AZ failover. The action tries each configuration in sequence until an instance is successfully launched.
  • New metadata-options input for configuring EC2 instance metadata (e.g. IMDSv2).
  • New packages input for installing packages via cloud-init during boot.
  • New region output for tracking which AWS region the instance was launched in.
  • EC2 console output polling via GetConsoleOutputCommand for remote debugging.
  • Test suite expanded to 25 tests covering JIT, debug mode, cloud-boothook, runuser, tolerant chown, stale config cleanup, and package installation.

Changed

  • Switched user-data format from #cloud-config with runcmd to #cloud-boothook. This fixes compatibility with Amazon Linux 2023 and other AMIs where cloud_final_modules may be empty or misconfigured.
  • Replaced su <user> -c with runuser -u <user> -- to avoid password prompts in non-interactive cloud-init contexts.
  • Made chown tolerant of permission errors (|| true) to prevent set -e from killing the script when _diag/ files are owned by root.
  • Setup script now removes stale runner config files (.runner, .credentials, .credentials_rsaparams) before config.sh to handle AMIs created from previously configured runner instances.
  • Setup script logs are written to /tmp/runner-setup.log instead of /var/log/user-data.log and /dev/console (which may not be accessible).
  • Updated README with full documentation for all new inputs, IAM requirements for debug mode, and advanced usage sections (JIT, Multi-AZ, Debug).