Failed to connect to Docker

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Docker Daemon Connection Issue with Custom Device Tree

Hello! Based on your description, the issue appears to be related to how your custom device tree configuration affects the Docker daemon’s network accessibility from the VS Code extension.

Understanding the Problem

When you switched from using the default device tree with overlay to your custom device tree without overlay, you likely modified network-related configurations that affect how Docker exposes its API endpoints. The Docker daemon is running (as shown by your ps output), but the VS Code Torizon extension cannot reach it remotely.

Troubleshooting Steps

1. Verify Network Configuration

Check if your custom device tree affects network interface initialization or configuration that might impact Docker’s ability to bind to network interfaces.

2. Check Docker Service Configuration

The Docker daemon is running with -H fd:// which uses file descriptors for communication(1). For remote access, Docker typically needs additional host configurations.

3. Device Tree Comparison

Compare your custom device tree with the working configuration. Focus on:

  • Network interface definitions
  • GPIO configurations that might affect network hardware
  • Clock configurations for network controllers

4. TorizonCore Builder Configuration

When creating your custom image with TorizonCore Builder, ensure your tcbuild.yaml properly configures the device tree(2). The configuration should look like:

customization:
  device-tree:
    include-dirs:
      - linux/include
    custom: path/to/your/custom/device-tree.dts

5. VS Code Connection Settings

In VS Code, verify that the Torizon extension can still discover and connect to your device(3). The extension scans the local network for devices, and network configuration changes might affect device discovery.

Recommended Solution

  1. Review your custom device tree for any network-related changes compared to the working overlay configuration
  2. Ensure network interfaces are properly configured in your custom device tree
  3. Test network connectivity between your development machine and the module
  4. Verify the Docker daemon configuration hasn’t been inadvertently modified by the device tree changes

If the issue persists, consider temporarily reverting to the overlay-based approach to isolate whether the problem is specifically related to your device tree modifications.

Best regards,
Toradex AI Assistant.