flake: test-go-pg (windows) infrastructure issue - setup-ramdisk download 500s #1477

CI Run Link: https://github.com/coder/coder/actions/runs/24649396062
Failed Job: test-go-pg (windows-2022) https://github.com/coder/coder/actions/runs/24649396062/job/72068671580

Commit Info:

• SHA: 7e89534d32df51ca5a3623bf382b0d7d935cb89c
• Author: Ethan
• Message: chore: use coder/hc-install fork to fix expired PGP key verification (#24516)

Failure summary

• Step: Setup RAM Disks (coder/setup-ramdisk-action@e110084)
• Root cause classification: Infrastructure (external dependency download failed)

Key failure evidence

# from Setup RAM Disks step
curl: (22) The requested URL returned error: 500
Warning: Problem : HTTP error. Will retry in 5 seconds. 5 retries left.
...
curl: (22) The requested URL returned error: 500
##[error]Process completed with exit code 22.

Download URL in the step:

https://github.com/ArsenalRecon/Arsenal-Image-Mounter/raw/5961f922c5b99ec29acc4af4b60b909b402eed95/Command%20line%20applications/aim_ll.zip

Additional context

• The job failed before actions/checkout, so downstream steps were skipped and the Upload Datadog action complained about missing checkout. That is a follow-on symptom, not the root cause.

Assignment analysis

• No test function failed; failure happened in the pre-checkout setup step.
• Workflow owner fallback:
  • git log --oneline -10 --follow .github/workflows/nightly-gauntlet.yaml
  • Recent non-bot edits to this workflow include Ethan’s CI maintenance changes.
• Assigning to @ethanndickson as CI workflow maintainer for nightly-gauntlet and setup steps.

Related issues

• No direct duplicates found in coder/internal for "setup-ramdisk-action", "Setup RAM Disks", "Arsenal-Image-Mounter", or "aim_ll.zip".
• Similar infra download flakes (not duplicates): flake: gen - Install Protoc invalid zip (GitHub Releases partial download) #1202 (protoc download invalid zip).

Reproduction

• Re-run nightly-gauntlet on main; failure appears during the Windows setup-ramdisk action when downloading Arsenal Image Mounter artifacts.

Possible mitigations

• Add retry/backoff + mirror/cached artifact for Arsenal-Image-Mounter downloads.
• Consider hosting the artifacts internally to avoid GitHub 500s.