Jesse Jaggars c4b500a7de feat(helm): cert-manager external issuer + OpenShift passthrough Route (#2468)
* fix(core): trust public root CAs alongside the sandbox mTLS CA

The supervisor gRPC client only trusted the CA configured via
OPENSHELL_TLS_CA, since tonic ClientTlsConfig starts with an empty root
store unless with_native_roots()/with_webpki_roots() is also enabled.
Deployments where the gateway server certificate is issued by a public CA
(e.g. cert-manager against an ACME issuer) caused every supervisor
connection to fail the TLS handshake with "UnknownCA", since the sandbox
mTLS CA and the server cert issuer were no longer the same.

Enable both native and webpki roots in addition to the configured CA.
tonic root store is a union of all configured sources, so this does not
weaken verification for existing self-signed deployments. webpki-roots
(compiled in) is enabled alongside native-roots since the supervisor
binary may run in minimal sandbox images without a populated system CA
bundle.

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

* feat(helm): support external cert-manager issuers and OpenShift Route passthrough

Add certManager.serverIssuerRef/clientIssuerRef so the gateway and mTLS
client certificates can be issued by a real Issuer/ClusterIssuer (e.g.
ACME) instead of only the chart built-in self-signed CA.

Add openshiftRoute template for exposing the gateway via a TLS
passthrough Route so the gateway keeps terminating its own TLS/mTLS.

The server Certificate excludes internal-only SANs (cluster-local,
localhost, loopback) when an external issuer is configured, since ACME
issuers reject those per CA/Browser Forum baseline requirements. A
template-time fail guard catches the misconfiguration at helm install
time rather than asynchronously at cert-manager issuance time.

Includes Helm unittest coverage for both issuerRef overrides and Route
rendering, plus a CI values overlay for lint coverage.

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

* docs: document cert-manager external issuer and OpenShift Route

Update managing-certificates.mdx with the serverIssuerRef workflow and
install-time validation behavior. Add a production section to the
OpenShift guide covering passthrough Route with a real certificate.
Regenerate Helm README for new certManager and openshiftRoute values.
Sync debug-openshell-cluster skill with new troubleshooting steps for
ACME issuance failures and supervisor UnknownCA from mismatched CAs.

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

* fix(helm,core): address PR review feedback on cert-manager external issuer

Addresses all five blocking review items from #2468:

1. Remove .with_native_roots() from supervisor gRPC client -- the
   supervisor runs inside the user-selected sandbox image, so the
   image CA bundle is not operator-controlled. Keep .with_webpki_roots()
   (compiled-in, not user-controlled) alongside the configured CA.

2. Fail at render time when serverIssuerRef.name is set but
   clientCaFromServerTlsSecret is still true. Add negative Helm test.

3. Remove clientIssuerRef -- changing only clientIssuerRef breaks both
   directions because trust bundles are not modeled separately. Change
   serverIssuerRef.kind default from ClusterIssuer to Issuer.

4. Add server.oidc.issuer and server.oidc.audience to the documented
   OpenShift production Helm command. Add Access Control prerequisite.

5. Fail at render time when openshiftRoute.enabled and disableTls are
   both true. Add negative Helm test.

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

* fix(drivers): strip GATEWAY_TLS_SERVER_NAME from Docker and Podman env

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

* fix(helm,drivers): guard default clientCaSecretName and add env-strip tests

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

* feat(tls): SNI-based dual certificate for internal and external server TLS

Split the gateway server certificate into two: an internal cert issued by
the chart's own CA (for supervisor connections via cluster-local SANs) and
an external cert issued by an operator-configured Issuer such as ACME/Let's
Encrypt (for CLI and Route access via public SANs).

The gateway uses SNI-based certificate selection: connections whose SNI
hostname matches external_server_names receive the external cert; all
others (including those with no SNI) receive the internal cert.

Security improvement: remove .with_webpki_roots() from the supervisor
gRPC client so supervisors trust only the chart CA, closing a MITM vector
via publicly-trusted certificates in user-supplied container images.

Key changes:
- Add DualCertResolver with SNI-based cert selection and full test coverage
- Add external_cert_path, external_key_path, external_server_names to TlsConfig
- Validate partial external cert config (error on cert-without-key or vice versa)
- Validate empty external_server_names when external cert is configured
- Split cert-manager templates into internal + external Certificate resources
- Add Helm guards for misconfigured external issuer (empty serverDnsNames,
  internal-only SANs with external issuer, conflicting clientCaFromServerTlsSecret)
- Update gateway-config.mdx, managing-certificates.mdx, openshift.mdx docs
- Update debug-openshell-cluster skill for dual-cert troubleshooting

Signed-off-by: Pi Agent <agent@openshell.local>

* fix(drivers): strip GATEWAY_TLS_SERVER_NAME in VM driver and correct comments

Add the same GATEWAY_TLS_SERVER_NAME environment stripping to the VM
compute driver that Docker, Podman, and Kubernetes drivers already
perform. Without this, a sandbox user on the VM driver could override
the TLS server name the supervisor verifies.

Fix stale comments in Docker and Podman drivers that referenced
'with WebPKI roots trusted' — WebPKI roots are explicitly not trusted
after the tls-webpki-roots removal.

Use tls-ring instead of bare channel for tonic in openshell-core so the
TLS API (ClientTlsConfig, Endpoint::tls_config) is available without
pulling in any root certificate store.

Signed-off-by: Pi Agent <agent@openshell.local>

* fix(tls,helm): wildcard SNI matching and Route host validation

Add RFC 6125 single-level wildcard matching to DualCertResolver so
external_server_names entries like *.example.com correctly match SNI
hostnames like gw.example.com. Previously only exact matches worked,
silently falling back to the internal cert for wildcard configurations.

Add a Helm fail guard in route.yaml that rejects openshiftRoute.host
values not listed in certManager.serverDnsNames when an external issuer
is configured — catches cert/route hostname mismatches at install time
instead of at TLS connect time.

Quote the host field in route.yaml for robustness.

Signed-off-by: Pi Agent <agent@openshell.local>

* fix(helm): address blocking review items — client-CA guard, wildcard Route, serverIssuerRef gate

1. Remove the obsolete guard rejecting serverIssuerRef + clientCaFromServerTlsSecret=true.
   The internal server certificate is always signed by the chart CA (the same
   CA that signs the client cert), so clientCaFromServerTlsSecret=true is
   correct — its filtered ca.crt is exactly the right trust anchor.  The old
   workaround (mounting openshell-ca-tls directly) unnecessarily exposed the
   CA private key to the gateway container.  Remove the client-CA overrides
   from docs, CI overlay, and production examples.

2. Route host validation now supports wildcard certificates per RFC 6125:
   single-level wildcards like *.example.com match gateway.example.com but
   not deep.sub.example.com.  Require an explicit openshiftRoute.host when
   an external issuer is configured — without one, OpenShift generates a
   hostname absent from serverDnsNames.

3. Reject serverIssuerRef.name when certManager.enabled is false — the
   external certificate, its Secret mount, and the gateway TLS config all
   require cert-manager to be enabled.

Validated on ROSA (dev.dyee.p3) with branch-built images:
- Fresh install with letsencrypt-prod ClusterIssuer
- SNI dual-cert: external hostname served Let's Encrypt cert
- Supervisor mTLS via internal cert path: ConnectSupervisor accepted
- Client CA volume: filtered ca.crt from internal server secret (no key)
- CLI connected via Route + OIDC

Helm tests: 81 pass across 7 suites.

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>

---------

Signed-off-by: Jesse Jaggars <jjaggars@redhat.com>
Signed-off-by: Pi Agent <agent@openshell.local>
2026-08-14 00:12:11 +00:00

OpenShell

License PyPI Security Policy Documentation Project Status

OpenShell is the safe, private runtime for autonomous AI agents. It provides sandboxed execution environments that protect your data, credentials, and infrastructure — governed by declarative YAML policies that prevent unauthorized file access, data exfiltration, and uncontrolled network activity.

OpenShell is built agent-first. The project ships with agent skills for everything from gateway troubleshooting to policy generation, and we expect contributors to use them.

Alpha software — single-player mode. OpenShell is proof-of-life: one developer, one environment, one gateway. We are building toward multi-tenant enterprise deployments, but the starting point is getting your own environment up and running. Expect rough edges. Bring your agent.

Quickstart

Prerequisites

  • A supported host — Linux, macOS (Apple Silicon), or Windows with WSL 2 (experimental).
  • A local runtime — Docker, Podman, or host virtualization enabled for MicroVM-backed sandboxes.

Install

Binary (recommended):

curl -LsSf https://raw.githubusercontent.com/NVIDIA/OpenShell/main/install.sh | sh

From PyPI (requires uv):

uv tool install -U openshell

Both methods install the latest stable release by default. To install a specific version, set OPENSHELL_VERSION (binary) or pin the version with uv tool install openshell==<version>. A dev release is also available that tracks the latest commit on main.

Helm chart:

Experimental — the Kubernetes deployment path is under active development. Expect rough edges and breaking changes.

Deploy the OpenShell gateway into a Kubernetes cluster from the OCI chart published to GHCR:

helm install openshell oci://ghcr.io/nvidia/openshell/helm-chart

See deploy/helm/openshell/README.md for available versions, dev tag conventions, and configuration.

For deploying OpenShell on OpenShift, see deploy/helm/openshell/README.md#install-on-openshift.

Create a sandbox

openshell sandbox create -- claude  # or opencode, codex, copilot

The sandbox container includes the following tools by default:

Category Tools
Agent claude, opencode, codex, copilot
Language python (3.14), node (22)
Developer gh, git, vim, nano
Networking ping, dig, nslookup, nc, traceroute, netstat

For more details see https://github.com/NVIDIA/OpenShell-Community/tree/main/sandboxes/base.

See network policy in action

Every sandbox starts with minimal outbound access. You open additional access with a short YAML policy that the proxy enforces at the HTTP method and path level, without restarting anything.

# 1. Create a sandbox (starts with minimal outbound access)
openshell sandbox create

# 2. Inside the sandbox — blocked
sandbox$ curl -sS https://api.github.com/zen
curl: (56) Received HTTP code 403 from proxy after CONNECT

# 3. Back on the host — apply a read-only GitHub API policy
sandbox$ exit
openshell policy set demo --policy examples/sandbox-policy-quickstart/policy.yaml --wait

# 4. Reconnect — GET allowed, POST blocked by L7
openshell sandbox connect demo
sandbox$ curl -sS https://api.github.com/zen
Anything added dilutes everything else.

sandbox$ curl -sS -X POST https://api.github.com/repos/octocat/hello-world/issues -d '{"title":"oops"}'
{"error":"policy_denied","detail":"POST /repos/octocat/hello-world/issues not permitted by policy"}

See the full walkthrough or run the automated demo:

bash examples/sandbox-policy-quickstart/demo.sh

How It Works

OpenShell isolates each sandbox in its own container with policy-enforced egress routing. A lightweight gateway coordinates sandbox lifecycle, and every outbound connection is intercepted by the policy engine, which does one of three things:

  • Allows — the destination and binary match a policy block.
  • Routes for inference — strips caller credentials, injects backend credentials, and forwards to the managed model.
  • Denies — blocks the request and logs it.
Component Role
Gateway Control-plane API that coordinates sandbox lifecycle and acts as the auth boundary.
Sandbox Isolated runtime with container supervision and policy-enforced egress routing.
Policy Engine Enforces filesystem, network, and process constraints from application layer down to kernel.
Privacy Router Privacy-aware LLM routing that keeps sensitive context on sandbox compute.

OpenShell runs a gateway control plane that manages sandbox lifecycle through a configured compute driver. Supported compute platforms include Docker, Podman, MicroVM, and Kubernetes.

Protection Layers

OpenShell applies defense in depth across four policy domains:

Layer What it protects When it applies
Filesystem Prevents reads/writes outside allowed paths. Locked at sandbox creation.
Network Blocks unauthorized outbound connections. Hot-reloadable at runtime.
Process Blocks privilege escalation and dangerous syscalls. Locked at sandbox creation.
Inference Reroutes model API calls to controlled backends. Hot-reloadable at runtime.

Policies are declarative YAML files. Static sections (filesystem, process) are locked at creation; dynamic sections (network, inference) can be hot-reloaded on a running sandbox with openshell policy set.

Providers

Agents need credentials — API keys, tokens, service accounts. OpenShell manages these as providers: named credential bundles that are injected into sandboxes at creation. The CLI auto-discovers credentials for recognized agents (Claude, Codex, OpenCode, Copilot) from your shell environment, or you can create providers explicitly with openshell provider create. Credentials never leak into the sandbox filesystem; they are injected as environment variables at runtime.

GPU Support (Experimental)

Experimental — GPU passthrough works on supported hosts but is under active development. Expect rough edges and breaking changes.

OpenShell can pass host GPUs into sandboxes for local inference, fine-tuning, or any GPU workload. Add --gpu when creating a sandbox:

openshell sandbox create --gpu --from [gpu-enabled-sandbox] -- claude

Docker-backed GPU sandboxes auto-select CDI when available and otherwise fall back to Docker's NVIDIA GPU request path (--gpus all).

Requirements: NVIDIA drivers and the NVIDIA Container Toolkit must be installed on the host. The sandbox image itself must include the appropriate GPU drivers and libraries for your workload — the default base image does not. See the BYOC example for building a custom sandbox image with GPU support.

Supported Agents

Agent Source Notes
Claude Code base Works out of the box. Provider uses ANTHROPIC_API_KEY.
OpenCode base Works out of the box. Provider uses OPENAI_API_KEY or OPENROUTER_API_KEY.
Codex base Works out of the box. Provider uses OPENAI_API_KEY.
GitHub Copilot CLI base Works out of the box. Provider uses GITHUB_TOKEN or COPILOT_GITHUB_TOKEN.
OpenClaw NemoClaw Run OpenClaw more securely inside NVIDIA OpenShell with managed inference using NemoClaw.
Hermes Agent NemoClaw Run Hermes Agent more securely inside NVIDIA OpenShell with managed inference using NemoClaw.
Ollama Community Launch with openshell sandbox create --from ollama.
Pi Community Launch with openshell sandbox create --from pi.

Key Commands

Command Description
openshell sandbox create -- <agent> Create a sandbox and launch an agent.
openshell sandbox connect [name] SSH into a running sandbox.
openshell sandbox list List all sandboxes.
openshell provider create --type [type] --from-existing Create a credential provider from env vars.
openshell policy set <name> --policy file.yaml Apply or update a policy on a running sandbox.
openshell policy get <name> Show the active policy.
openshell inference set --provider <p> --model <m> Configure the inference.local endpoint.
openshell logs [name] --tail Stream sandbox logs.
openshell term Launch the real-time terminal UI for debugging.

See the full documentation for command guides, tutorials, and reference material.

Terminal UI

OpenShell includes a real-time terminal dashboard for monitoring gateways, sandboxes, and providers — inspired by k9s.

openshell term

OpenShell Terminal UI

The TUI gives you a live, keyboard-driven view of your gateway and sandboxes. Navigate with Tab to switch panels, j/k to move through lists, Enter to select, and : for command mode. Gateway health and sandbox status auto-refresh every two seconds.

Community Sandboxes and BYOC

Use --from to create sandboxes from the OpenShell Community catalog, a local directory, or a container image:

openshell sandbox create --from gemini             # community catalog
openshell sandbox create --from ./my-sandbox-dir   # local Dockerfile
openshell sandbox create --from registry.io/img:v1 # container image

See the OpenShell Community catalog and the BYOC example for details.

Explore with Your Agent

Clone the repo and point your coding agent at it. The project includes agent skills that can answer questions, walk you through workflows, and diagnose problems — no issue filing required.

git clone https://github.com/NVIDIA/OpenShell.git   # or git@github.com:NVIDIA/OpenShell.git
cd OpenShell
# Point your agent here — it will discover the skills in .agents/skills/ automatically

Your agent can load skills for CLI usage (openshell-cli), gateway troubleshooting (debug-openshell-cluster), inference troubleshooting (debug-inference), policy generation (generate-sandbox-policy), and more. See CONTRIBUTING.md for the full skills table.

Built With Agents

OpenShell is developed using the same agent-driven workflows it enables. The .agents/skills/ directory contains workflow automation that powers the project's development cycle:

  • Spike and build: Investigate a problem with create-spike; a human accepts or declines it and separately places it on the roadmap. Accepted work can remain human-owned or enter the optional, human-gated agent:* planning and implementation workflow.
  • Triage and route: Community issues are assessed with triage-issue. Agents establish technical validity and impact; humans decide whether the project should act and where the work sits on the roadmap.
  • Security review: review-security-issue produces a severity assessment and remediation plan. fix-security-issue implements it.
  • Policy authoring: generate-sandbox-policy creates YAML policies from plain-language requirements or API documentation.

All agent implementation work is human-gated: maintainers explicitly request a plan, agents propose it, maintainers approve it, and agents build. See AGENTS.md for the full workflow chain documentation.

Getting Help

  • Questions and discussion: GitHub Discussions
  • Bug reports: GitHub Issues — use the bug report template
  • Security vulnerabilities: See SECURITY.md — do not use GitHub Issues
  • Agent-assisted help: Clone the repo and use the agent skills in .agents/skills/ for self-service diagnostics

Learn More

Contributing

OpenShell is built agent-first — your agent is your first collaborator. Before opening issues or submitting code, point your agent at the repo and let it use the skills in .agents/skills/ to investigate, diagnose, and prototype. See CONTRIBUTING.md for the full agent skills table, contribution workflow, and development setup.

Telemetry

OpenShell collects anonymous telemetry to help improve the project for developers. This data is not used to track individual user behavior. It helps us understand aggregate usage of sandbox, provider, and policy workflows so we can prioritize product improvements and share usage trends with the community.

Disable telemetry at runtime by setting OPENSHELL_TELEMETRY_ENABLED=false on the gateway deployment. For Helm installs, set server.telemetryEnabled=false. OpenShell propagates this deployment setting into sandbox supervisor environments so sandbox-side telemetry collection is disabled as well.

You can also compile telemetry out entirely. Telemetry support is a default-on telemetry Cargo feature; building with --no-default-features produces binaries that contain no telemetry endpoint, no telemetry HTTP client, and no emission code. Build telemetry-free artifacts with, for example, cargo build --release -p openshell-server --no-default-features (gateway) and the equivalent for openshell-sandbox and openshell-driver-vm. With telemetry compiled out, the gateway emits nothing and reports telemetry disabled to the sandboxes it launches.

Telemetry events are limited to anonymous operational categories and counts, such as sandbox lifecycle outcomes, provider profile buckets, policy decision counts, and aggregate network activity denial categories. OpenShell telemetry does not collect sandbox names or IDs, hostnames, file paths, binary paths, prompts, credentials, provider names, model names, or user content.

Opting out applies only to telemetry emitted by OpenShell. Third-party services, model providers, inference endpoints, agents, or tools that you configure and use with OpenShell may have their own terms and privacy practices.

We publish aggregate usage trends from this telemetry every two weeks. See the community telemetry reports for the latest summary.

Notice and Disclaimer

This software automatically retrieves, accesses or interacts with external materials. Those retrieved materials are not distributed with this software and are governed solely by separate terms, conditions and licenses. You are solely responsible for finding, reviewing and complying with all applicable terms, conditions, and licenses, and for verifying the security, integrity and suitability of any retrieved materials for your specific use case. This software is provided "AS IS", without warranty of any kind. The author makes no representations or warranties regarding any retrieved materials, and assumes no liability for any losses, damages, liabilities or legal consequences from your use or inability to use this software or any retrieved materials. Use this software and the retrieved materials at your own risk.

License

This project is licensed under the Apache License 2.0.

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