[docs] docs: add gVisor startup crash recovery documentation by github-actions[bot] · Pull Request #6540 · github/gh-aw-firewall

github-actions · 2026-07-23T17:00:26Z

Summary

This PR documents the gVisor startup crash recovery mechanism introduced in #6514, which automatically retries transient container initialization failures.

Changes Made

Updated docs/architecture.md with:

New Section: gVisor Startup Crash Recovery under "Container Architecture"
- Documents retryable exit codes (134 for abort, 139 for segfault)
- Explains the 30-second startup window to distinguish initialization crashes from user failures
- Notes the maximum 1 retry attempt per execution
- References implementation in src/container-lifecycle.ts
Updated "Container Startup" subsection in "How It Works"
- Added step 4 describing gVisor startup crash recovery
- Explains when retries occur and what they prevent

Verification

Documentation accurately reflects the retry logic in src/container-lifecycle.ts
Constants documented: MAX_GVISOR_AGENT_RETRIES = 1, GVISOR_STARTUP_CRASH_WINDOW_MS = 30_000
Exit codes match implementation: 134 (abort) and 139 (segfault)
Timing window aligns with V8/Node.js initialization expectations

Related Issues

Addresses documentation gaps from #6514 (Retry gVisor agent startup crashes once before failing)

This ensures developers understand the automatic recovery behavior when gVisor containers encounter transient startup failures.

Generated by Documentation Maintainer · haiku45 17.8 AIC · ⊞ 4.6K · ◷

Document the automatic retry mechanism for gVisor agent startup crashes: - Retryable exit codes 134 (abort) and 139 (segfault) - 30-second startup window to prevent retrying actual user failures - Maximum 1 retry attempt per command execution - Reference to src/container-lifecycle.ts implementation Addresses changes from commit d8ef306 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-07-23T17:20:10Z

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Built from commit 9327b73

Copilot

Pull request overview

Documents automatic retry behavior for short-lived gVisor agent crashes.

Changes:

Adds retry exit codes, timing window, and retry limit.
Updates the container startup sequence with recovery behavior.

Show a summary per file

File	Description
`docs/architecture.md`	Documents gVisor crash recovery, but overstates the runtime heuristic as proof user code has not started.

Review details

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Comments suppressed due to low confidence (1)

docs/architecture.md:145

This repeats the unsupported assertion that the 30-second check means no agent work began. runAgentCommand() applies the check after any exit 134/139 and only compares Docker's StartedAt and FinishedAt, so a short-running user command can trigger it too. Describe the measured-runtime heuristic rather than presenting it as a guaranteed startup boundary.

4. **gVisor Startup Crash Recovery** (when using gVisor runtime):
   - If the agent container exits during startup with crash codes (134, 139), the firewall will retry once
   - Only retries if the container crashed within 30 seconds (before any agent work began)
   - Prevents transient crashes during V8/Node.js initialization from failing the entire workflow
   - Exit codes 134 (abort) and 139 (segfault) are considered retryable startup crashes

Files reviewed: 1/1 changed files
Comments generated: 1
Review effort level: Medium

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

github-actions · 2026-07-23T18:07:49Z

✅ Copilot review passed with no inline comments.

@github-actions[bot] Add the ready-for-aw label to this PR to trigger agentic CI smoke tests.

lpcox · 2026-07-23T18:07:54Z

@copilot merge main

…ecovery-887f2796a0fa0ea4

Copilot · 2026-07-23T18:13:11Z

@copilot merge main

Merged main into this branch in commit 5104a14.

lpcox · 2026-07-23T23:13:54Z

@copilot merge main

…ecovery-887f2796a0fa0ea4

Copilot · 2026-07-23T23:18:19Z

@copilot merge main

Merged main into this branch in commit 6964405.

github-actions · 2026-07-23T23:52:32Z

📡 Smoke OTel Tracing completed. All tracing scenarios validated. ✅

github-actions · 2026-07-23T23:52:33Z

📰 VERDICT: Smoke Docker Sbx has concluded. All systems operational. This is a developing story. 🎤

github-actions · 2026-07-23T23:52:35Z

Chroot tests passed! Smoke Chroot - All security and functionality tests succeeded.

github-actions · 2026-07-23T23:52:35Z

🛡️ Smoke Copilot Network Isolation confirmed the egress allowlist is enforced. ✅

github-actions · 2026-07-23T23:52:36Z

✅ Smoke Copilot BYOK AOAI (api-key) completed. Copilot AOAI BYOK (api-key) mode operational. 🔓

github-actions · 2026-07-23T23:52:36Z

✅ Build Test Suite completed successfully!

github-actions · 2026-07-23T23:52:37Z

✅ Smoke Copilot BYOK completed. Copilot BYOK mode operational. 🔓

github-actions · 2026-07-23T23:52:38Z

✅ Smoke Gemini completed. All facets verified. 💎

github-actions · 2026-07-23T23:52:44Z

✅ Smoke Copilot BYOK AOAI (Entra) completed. Copilot AOAI BYOK (Entra) mode operational. 🔓

github-actions · 2026-07-23T23:52:50Z

🔑 Smoke Copilot PAT reports failed. PAT auth path may have issues...

github-actions · 2026-07-23T23:52:52Z

✅ Contribution Check completed successfully!

Contribution check complete: the PR is docs-only, updates the architecture documentation, and references related issue #6514 in the description. No guideline violations found that require a PR comment.

github-actions · 2026-07-23T23:52:54Z

🚀 Security Guard has started processing this pull request

github-actions · 2026-07-23T23:55:36Z

🔬 Smoke Test Results

Test	Status
GitHub MCP Connectivity	✅ MCP server responded (secrecy filter applied)
GitHub.com HTTP	✅ HTTP 200
File Write/Read	⚠️ Pre-step template vars not expanded

Overall: PASS (core connectivity verified; file test skipped due to unexpanded workflow template variables)

@lpcox

📰 BREAKING: Report filed by Smoke Copilot
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github-actions · 2026-07-23T23:55:43Z

Smoke Test: Claude Engine Validation

Check	Result
API status	✅ PASS
gh check	✅ PASS
File status	✅ PASS

Overall result: PASS ✅

Generated by Smoke Claude for #6540 · haiku45 54.1 AIC · ⊞ 3.3K · ◷
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github-actions · 2026-07-23T23:55:51Z

Smoke Test Results

GitHub MCP: ❌ (Tool not found, fallback to git log used)
Connectivity: ❌ (Status 000)
File Writing: ✅
Bash Tool: ✅

PRs Reviewed:

ci: use github.token for copilot-engine workflows (drop removed COPILOT_GITHUB_TOKEN secret) #6556: ci: use github.token for copilot-engine workflows
fix: resolve High/Critical CVEs in agent, api-proxy, and cli-proxy container images #6545: fix: resolve High/Critical CVEs in container images

Overall status: FAIL

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

localhost

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "localhost"

See Network Configuration for more information.

💎 Faceted by Smoke Gemini
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github-actions · 2026-07-23T23:55:54Z

Smoke Test: Copilot BYOK (Direct) Mode

All tests PASSED ✅

Test	Result
GitHub MCP Connectivity	✅
GitHub.com HTTP (200)	✅
File Write/Read	✅
BYOK Inference Path	✅

Mode: Direct BYOK (COPILOT_PROVIDER_API_KEY) → api-proxy sidecar → api.githubcopilot.com

Status: PASS

🔑 BYOK report filed by Smoke Copilot BYOK
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github-actions · 2026-07-23T23:56:16Z

🔥 Smoke Test: Copilot Network Isolation

EGRESS_RESULT allow=pass deny=pass

✅ Allowed domain (api.github.com): HTTP 200
✅ Blocked domain (example.com): connection denied (403 via proxy)

Overall: PASS — egress enforcement is working correctly.

@lpcox

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

example.com

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "example.com"

See Network Configuration for more information.

🛡️ Egress verdict from Smoke Copilot Network Isolation
_{Add label ready-for-aw to run again}

github-actions · 2026-07-23T23:56:26Z

Smoke Test: API Proxy OpenTelemetry Tracing

Scenario	Status	Notes
1. Module Loading	✅ Pass	`otel.js` loads successfully; exports: `startRequestSpan`, `setTokenAttributes`, `setBudgetAttributes`, `endSpan`, `endSpanError`, `shutdown`, `isEnabled`, and internal helpers
2. Test Suite	✅ Pass	39/39 tests passed in `otel.test.js` (ProxyAwareOtlpExporter, FileSpanExporter, shutdown)
3. Env Var Forwarding	✅ Pass	`src/services/api-proxy-env-config.ts` forwards `GH_AW_OTLP_ENDPOINTS`, `OTEL_EXPORTER_OTLP_ENDPOINT`, `OTEL_EXPORTER_OTLP_HEADERS`, `GITHUB_AW_OTEL_TRACE_ID`, `GITHUB_AW_OTEL_PARENT_SPAN_ID`, and `OTEL_SERVICE_NAME` to the api-proxy container
4. Token Tracker Integration	✅ Pass	`onUsage` callback exists in `token-tracker-http.js` (line 386) as the OTEL hook point
5. OTEL Diagnostics	✅ Pass	No OTEL endpoint configured in this run; graceful degradation confirmed (no errors on load)

All 5 scenarios pass. OTEL tracing integration is functioning as expected.

📡 OTel tracing validated by Smoke OTel Tracing
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github-actions · 2026-07-23T23:56:39Z

@lpcox

✅ GitHub MCP connectivity
✅ GitHub.com connectivity
✅ File write/read test
✅ BYOK inference

Running in direct BYOK mode (AWF_AUTH_TYPE=github-oidc + AWF_AUTH_AZURE_* + COPILOT_PROVIDER_BASE_URL) via api-proxy → Azure OpenAI (Foundry, o4-mini-aw)

Overall: PASS

🪪 BYOK (AOAI Entra) report filed by Smoke Copilot BYOK AOAI (Entra)
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github-actions · 2026-07-23T23:56:46Z

Smoke Test: PASS

Reviewed PRs:

ci: use github.token for copilot-engine workflows (drop removed COPILOT_GITHUB_TOKEN secret)
fix: resolve High/Critical CVEs in agent, api-proxy, and cli-proxy container images

Checks:

GitHub PR query ✅
Discussion query ✅
Playwright title check ✅
File write/read ✅
Build ✅

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

registry.npmjs.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "registry.npmjs.org"

See Network Configuration for more information.

🔮 The oracle has spoken through Smoke Codex
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github-actions · 2026-07-23T23:56:50Z

Smoke Test: GitHub Actions Services Connectivity

Redis PING: ❌ (host.docker.internal DNS resolution failed)
PostgreSQL pg_isready: ❌ (no response)
PostgreSQL SELECT 1: ❌ (DNS resolution failed)

Overall: FAIL — host.docker.internal is not resolvable in this environment. Service containers may not be running or the hostname is not configured.

🔌 Service connectivity validated by Smoke Services
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github-actions · 2026-07-23T23:56:51Z

Chroot Version Comparison Results

Runtime	Host Version	Chroot Version	Match?
Python	`Python 3.12.13`	`Python 3.12.13`	✅ YES
Node.js	`v24.18.0`	`v22.23.1`	❌ NO
Go	`go1.22.12`	`go1.22.12`	✅ YES

Result: ❌ FAILED — Node.js version mismatch detected (host: v24.18.0, chroot: v22.23.1).

Tested by Smoke Chroot
_{Add label ready-for-aw to run again}

github-actions · 2026-07-23T23:57:27Z

Smoke Test Results:

GitHub MCP connectivity: ✅
GitHub.com connectivity: ✅
File write/read: ✅
BYOK inference (o4-mini-aw via api-proxy): ✅

Overall status: PASS

Running in direct BYOK mode (COPILOT_PROVIDER_API_KEY + COPILOT_PROVIDER_BASE_URL) via api-proxy → Azure OpenAI (Foundry, o4-mini-aw)

Cc @lpcox

🔑 BYOK (AOAI api-key) report filed by Smoke Copilot BYOK AOAI (api-key)
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github-actions · 2026-07-23T23:59:38Z

🏗️ Build Test Suite Results

Ecosystem	Project	Build/Install	Tests	Status
Bun	elysia	✅	1/1 passed	✅ PASS
Bun	hono	✅	1/1 passed	✅ PASS
C++	fmt	✅	N/A	✅ PASS
C++	json	✅	N/A	✅ PASS
Deno	oak	N/A	1/1 passed	✅ PASS
Deno	std	N/A	1/1 passed	✅ PASS
.NET	hello-world	✅	N/A	✅ PASS
.NET	json-parse	✅	N/A	✅ PASS
Go	color	✅	1/1 passed	✅ PASS
Go	env	✅	1/1 passed	✅ PASS
Go	uuid	✅	1/1 passed	✅ PASS
Java	gson	✅	1/1 passed	✅ PASS
Java	caffeine	✅	1/1 passed	✅ PASS
Node.js	clsx	✅	All passed	✅ PASS
Node.js	execa	✅	All passed	✅ PASS
Node.js	p-limit	✅	All passed	✅ PASS
Rust	fd	✅	1/1 passed	✅ PASS
Rust	zoxide	✅	1/1 passed	✅ PASS

Overall: 8/8 ecosystems passed — ✅ PASS

Generated by Build Test Suite for #6540 · sonnet46 33.9 AIC · ⊞ 8.3K · ◷
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github-actions · 2026-07-24T00:01:52Z

🔥 Smoke Test Results — Docker Sbx

Test	Result
GitHub MCP connectivity	✅ Connected (secrecy-filtered response received)
GitHub.com HTTP	⚠️ Pre-step data unavailable (template not expanded)
File write/read	⚠️ Pre-step data unavailable (template not expanded)

Overall: PARTIAL — MCP connectivity confirmed; pre-computed step outputs were not expanded in the workflow template.

cc @lpcox

📰 BREAKING: Report filed by Smoke Docker Sbx
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github-actions Bot added ai-generated documentation Improvements or additions to documentation labels Jul 23, 2026

lpcox requested a review from Copilot July 23, 2026 17:19

Copilot started reviewing on behalf of lpcox July 23, 2026 17:20 View session

Copilot AI reviewed Jul 23, 2026

View reviewed changes

Comment thread docs/architecture.md Outdated

Potential fix for pull request finding

5ea0dec

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Copilot started work on behalf of lpcox July 23, 2026 18:08 View session

Merge remote-tracking branch 'origin/main' into docs/gvisor-startup-r…

5104a14

…ecovery-887f2796a0fa0ea4

Copilot finished work on behalf of lpcox July 23, 2026 18:13

Copilot AI requested a review from lpcox July 23, 2026 18:13

Copilot started work on behalf of lpcox July 23, 2026 23:14 View session

Merge remote-tracking branch 'origin/main' into docs/gvisor-startup-r…

6964405

…ecovery-887f2796a0fa0ea4

Copilot finished work on behalf of lpcox July 23, 2026 23:18

lpcox added the ready-for-aw label Jul 23, 2026

lpcox temporarily deployed to aoai-model July 23, 2026 23:52 — with GitHub Actions Inactive

github-actions Bot added the smoke-copilot label Jul 23, 2026

github-actions Bot added the smoke-claude label Jul 23, 2026

github-actions Bot added the smoke-copilot-byok label Jul 23, 2026

lpcox temporarily deployed to aoai-model July 23, 2026 23:56 — with GitHub Actions Inactive

github-actions Bot added the smoke-copilot-network-isolation Copilot network-isolation egress smoke test label Jul 23, 2026

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lpcox temporarily deployed to aoai-model July 23, 2026 23:56 — with GitHub Actions Inactive

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lpcox merged commit 3f23202 into main Jul 24, 2026
132 of 134 checks passed

lpcox deleted the docs/gvisor-startup-recovery-887f2796a0fa0ea4 branch July 24, 2026 00:05

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