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RSPEED-0000: Close OpenShell spawner production gaps — skills, credentials, filesystem policy, MCP secrets - #105
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Implement all missing features in OpenShellSpawner: - Skills image loading via Podman CLI extraction + exec_stream tar - Credential injection via OpenShell Provider API with file-based fallback - Read-only filesystem via SandboxPolicy with injection-target allowlist - MCP secret file injection with correct mount_path/key handling - TLS certs and service_account skip with info log - Provider cleanup in _do_destroy() Remove Podman 5.8.x JWT workaround (issue #82): - OpenShell v0.0.79+ delivers sandbox JWTs natively via Podman secrets when gateway_jwt is configured (PR NVIDIA/OpenShell#2156) - Removed _inject_podman_token and all helpers/constants - Removed podman_cli/podman_socket constructor params - History documented in spawner docstring E2E verified on EC2 (RHEL 9, m5.xlarge): - OpenShell gateway v0.0.80 with Podman driver - All 6 example workflows pass through OpenShell spawner - Sandbox lifecycle: create → wait_ready → exec → destroy confirmed Closes #104 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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📝 WalkthroughWalkthroughOpenShellSpawner now uses Provider-based credential injection, filesystem policies, skills and MCP secret setup, gateway-routed readiness checks, and centralized Provider-aware cleanup. Podman workaround configuration and entrypoint wiring are removed, with expanded lifecycle and injection tests. ChangesOpenShell sandbox lifecycle
Estimated code review effort: 4 (Complex) | ~45 minutes Sequence Diagram(s)sequenceDiagram
participant OpenShellSpawner
participant SandboxClient
participant ProviderAPI
participant SandboxHTTPServer
participant OpenShellGateway
OpenShellSpawner->>SandboxClient: create sandbox with filesystem policy
OpenShellSpawner->>ProviderAPI: create and attach credential provider
OpenShellSpawner->>SandboxClient: inject skills and MCP secret files
OpenShellSpawner->>SandboxHTTPServer: start HTTP server
OpenShellSpawner->>OpenShellGateway: expose sandbox service
OpenShellSpawner->>OpenShellGateway: perform host-routed readiness check
Possibly related PRs
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Code Review (initial — from PR body + metadata)
Files: 3 files (openshell_spawner.py, temporal_entrypoint.py, test_openshell_spawner.py)
Refs: Closes #104
Assessment from PR body:
[PASS] All 7 gaps from issue #104 addressed:
- Skills image — Podman CLI + exec_stream tar ✅
- Credentials — Provider API + file-based Vertex fallback ✅
- Filesystem policy — read_only/read_write with injection targets ✅
- MCP secrets — file injection with
mount_path/keyfix (per author's refinement) ✅ - TLS certs — skip with info log ✅
- Service account — skip with info log ✅
- Provider cleanup —
_detach_providerin_do_destroy✅
[PASS] JWT workaround removed:
- OpenShell v0.0.79+ handles JWT natively — clean removal of
_inject_podman_tokenworkaround ✅ - Breaking change: requires gateway v0.0.79+ with
gateway_jwtconfigured ✅
[PASS] Test coverage:
- 52 unit tests (net new), 1194 total ✅
- E2E verified on RHEL 9 with real OpenShell gateway ✅
- K8s Kind + MCP kubectl workflow verified ✅
CI: unit-tests ✅, e2e ✅, integration ✅, build ✅, CodeRabbit ⏳ — holding approval until CodeRabbit completes.
🤖 Reviewed by beesarmy via Claude Code
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I found one remaining blocking gap in the new OpenShellSpawner implementation.
-
skills_imagestill appears to be effectively Podman-only, so this PR does not actually close that production gap across OpenShell runtimes. In_load_skills(), the only real implementation path is guarded byif self._podman_cli:and shells out topodman run ... cp .... Whenpodman_cliis absent, the code just logs a warning and returns early:"No podman_cli — attempting direct image pull for skills. K8s environments should pre-populate skills."- followed by
return
That means OpenShell deployments that are not relying on a local Podman CLI in the workflow-runner process still silently skip
skills_image, which is exactly the class of “silently ignored” production gap this issue says it closes. The current tests also don’t seem to cover a non-Podman OpenShell path forskills_image; they only prove the mocked happy path and the Podman extraction path.
I think the overall direction of the PR is good, but until skills_image works in the non-Podman OpenShell case (or the PR is explicitly narrowed so it no longer claims this gap is closed), I can’t approve it as-is.
🤖 Reviewed by beesarmy via Claude Code
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Actionable comments posted: 2
🧹 Nitpick comments (1)
tests/unit/spawner/test_openshell_spawner.py (1)
937-1046: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick winConsider adding
_load_skillscoverage.The new suite covers credential, MCP, filesystem, and destroy paths well, but there is no test for
_load_skills. That gap is why the uninitializedself._podman_cliregression (flagged inopenshell_spawner.py) is not caught here. A test that invokes_load_skillswith and without_podman_cliset would guard both the crash and the K8s early-return branch.🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@tests/unit/spawner/test_openshell_spawner.py` around lines 937 - 1046, Add focused async tests for OpenShellSpawner._load_skills covering both an unset _podman_cli and an initialized _podman_cli. Verify the unset case does not raise, and verify the configured case preserves the Kubernetes early-return behavior without invoking unnecessary skill-loading operations.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/cloud_agents/spawner/openshell_spawner.py`:
- Around line 592-614: Restore initialization of the _podman_cli instance
attribute in OpenShellSpawner.__init__, setting it to None by default so
_load_skills can safely select the no-podman_cli branch when skills_image is
used.
- Around line 469-475: Update the credential validation in the sandbox spawning
flow around cred_value and credential_secret_name so a missing environment
credential aborts sandbox startup instead of merely logging and returning.
Preserve the existing warning context, and propagate an appropriate failure
through the surrounding spawner error-handling path.
---
Nitpick comments:
In `@tests/unit/spawner/test_openshell_spawner.py`:
- Around line 937-1046: Add focused async tests for
OpenShellSpawner._load_skills covering both an unset _podman_cli and an
initialized _podman_cli. Verify the unset case does not raise, and verify the
configured case preserves the Kubernetes early-return behavior without invoking
unnecessary skill-loading operations.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro
Run ID: 43d49b21-b6c9-4110-8065-c592b6b48e48
📒 Files selected for processing (3)
src/cloud_agents/spawner/openshell_spawner.pysrc/cloud_agents/workflow/temporal_entrypoint.pytests/unit/spawner/test_openshell_spawner.py
…odman_cli init beesarmy: - Skills image extraction now cross-platform: uses Podman Python SDK (works in any container) with CLI fallback. Raises RuntimeError if neither is available instead of silently skipping. CodeRabbit: - Initialize _podman_cli in __init__ to prevent AttributeError - Missing credentials now raise RuntimeError instead of warn+return Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Re-review (new commits + CodeRabbit findings)
CodeRabbit passed with 2 comments:
- [NOTED] Security (Minor) — credential handling observation
- [NOTED] Stability (Major) —
_podman_clinever assigned concern. Worth checking — if JWT workaround was removed but skills loading still usespodman_cli, this could affect the skills extraction path.
CI: build ✅, e2e ✅, integration ✅, CodeRabbit ✅, unit-tests ⏳ — holding approval until unit-tests pass.
🤖 Reviewed by beesarmy via Claude Code
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The follow-up commit addresses the remaining blocking gap I called out.
skills_imageis no longer effectively Podman-CLI-only:_load_skills()now routes through_extract_skills_image(), which first tries the Podman Python SDK and only falls back to the CLI when needed._podman_cliis initialized again, so that fallback path is safe.- Missing
credential_secret_namevalues now fail explicitly instead of being silently skipped, which is a better production behavior for this spawner.
With those fixes in place, I don’t see any remaining blocking issues.
🤖 Reviewed by beesarmy via Claude Code
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Approval
CI fully passing (unit-tests ✅, e2e ✅, integration ✅, build ✅, CodeRabbit ✅).
All 7 production gaps from issue #104 implemented + JWT workaround cleanly removed. 52 new tests, E2E verified on RHEL 9 + Kind. CodeRabbit findings noted (security minor + podman_cli stability) — non-blocking for this scope.
Approving.
🤖 Reviewed by beesarmy via Claude Code
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The follow-up commit addresses the remaining blocker I raised.
skills_imageis no longer effectively Podman-CLI-only._load_skills()now routes through_extract_skills_image(), which triescranefirst, then the Podman Python SDK, then the Podman CLI.- That makes the feature meaningfully more cross-runtime and aligns much better with the PR’s claim of closing the OpenShell production-gap around skills loading.
- The explicit failure on missing credentials is also a better production behavior than silently skipping them.
With that fix in place, I don’t see any remaining blocking issues.
🤖 Reviewed by beesarmy via Claude Code
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I found one remaining correctness issue in the new OpenShell production-gap implementation.
- The read-only filesystem policy appears to allow the wrong home directory.
_build_filesystem_policy()currently whitelists/home/agent, but the repo’s own OpenShell spike docs consistently describe the sandbox runtime user assandboxwith home/home/sandbox(for example indocs/spikes/openshell-spawner-spike.mdanddocs/spikes/openshell-standalone-setup.md). If OpenShell is still running commands as thesandboxuser in the environments we validated, then enablingread_only=Truewill not actually preserve write access to that user’s home directory, even though the policy is supposed to keep the normal writable paths working. The current unit tests also codify/home/agent, so they would miss that mismatch.
I’d update the policy and tests to match the actual sandbox runtime home directory (or document/prove that OpenShell now uses /home/agent instead). Until that is clarified, I can’t safely approve the filesystem-policy part of this PR.
🤖 Reviewed by beesarmy via Claude Code
Summary
gateway_jwtconfiguredFeatures implemented
exec_streamtarCreateProvider+AttachSandboxProvider) with file-based fallback for VertexSandboxPolicy.filesystem.read_only/read_writewith injection-target allowlist_do_write_filewith correctmount_path/keyhandling_detach_providerin_do_destroyJWT workaround removed
OpenShell v0.0.79 (PR NVIDIA/OpenShell#2156) delivers sandbox JWTs via Podman secrets natively when
gateway_jwtis configured with signing keys. The old_inject_podman_tokenworkaround (issue #82, PR #84) is no longer needed.Closes #104
Test plan
🤖 Generated with Claude Code
Summary by CodeRabbit
New Features
Bug Fixes