sandbox create fails with "h2 protocol error: frame with invalid size"

[henry-1981]

Environment

• OpenShell CLI version: 0.0.6
• Gateway container: ghcr.io/nvidia/openshell/cluster:0.0.6
• Host OS: Ubuntu 24.04 LTS
• Docker version: 29.3.0

Description

When attempting to create a sandbox using openshell sandbox create, the command fails with an HTTP/2 protocol error. The gateway container is running and healthy, but the CLI cannot communicate with it via gRPC.

Steps to Reproduce

1. Install OpenShell CLI 0.0.6:

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

2. Start gateway:

   openshell gateway start --name test

3. Verify gateway container is running:

   docker ps | grep openshell
   # Output: openshell-cluster-test running on port 8080

4. Register gateway:

   openshell gateway add --name test http://localhost:8080

5. Attempt to create sandbox:

   openshell sandbox create --name test-sandbox

Expected Behavior

Sandbox should be created successfully.

Actual Behavior

Command fails with the following error:

Error:   × status: Unknown, message: "h2 protocol error: http2 error", details: [],
  │ metadata: MetadataMap { headers: {} }
  ├─▶ transport error
  ├─▶ http2 error
  ╰─▶ connection error detected: frame with invalid size

Additional Context

• The gateway container logs show Kubernetes cluster (k3s) is running successfully
• curl http://localhost:8080 responds with "Received HTTP/0.9 when not allowed" (expected for gRPC endpoint)
• Gateway health check shows as healthy
• The CLI and gateway are the same version (0.0.6)

This appears to be a gRPC communication issue between the CLI and the gateway cluster, possibly related to HTTP/2 frame size negotiation.

Workaround

None found yet

[drew]

Thanks for reporting the issue. Can you please attach logs from the gateway? openshell doctor logs.

Thanks.

[henry-1981]

nemoclaw-error-logs.txt