docs: add D5 failure mode — stale gVisor release pin returns 404#6161
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[WIP] Update Runner Doctor with new failure mode D5
docs: add D5 failure mode — stale gVisor release pin returns 404
Jul 13, 2026
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Pull request overview
Adds runner-doctor guidance for diagnosing stale gVisor release pins returning HTTP 404.
Changes:
- Adds D5 failure-mode diagnosis and remediation.
- Adds HTTP 404 quick-lookup entries.
- Mirrors guidance in the portable doctor agent.
Show a summary per file
| File | Description |
|---|---|
.github/workflows/shared/self-hosted-failure-modes.md |
Adds shared D5 guidance and lookup. |
.github/agents/self-hosted-runner-doctor.md |
Adds D5 to the portable agent. |
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- Files reviewed: 2/2 changed files
- Comments generated: 2
- Review effort level: Medium
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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Adds new failure mode D5 to the runner doctor knowledge base: gVisor install fails with HTTP 404 when the pinned release tag (e.g.
20250623.0) has been removed fromstorage.googleapis.com.Changes
.github/workflows/shared/self-hosted-failure-modes.mdand.github/agents/self-hosted-runner-doctor.md(kept in sync per updater workflow convention):HTTP 404/runscnot found /runtime 'gvisor' is not available), root cause (hardcoded stale release tag), fix (bump to20250707.0+, or upgrade to AWF post-fix: update gVisor release pin from 20250623.0 to 20250707.0 #6143), and probe (curl -sIthe pinned URL to confirm 404)HTTP 404/404 Not Foundonstorage.googleapis.comduring gVisor install → D5D5 is distinct from D1 (gVisor runtime compatibility): D1 covers AWF not starting or isolation being ineffective after gVisor is installed; D5 is a pre-installation download failure.