feat: Add k3d feature to devcontainer features

[Copilot]

This PR adds a new devcontainer feature for k3d - a lightweight wrapper to run k3s (Rancher Lab's minimal Kubernetes distribution) in Docker.

Implementation details:

• Created the basic feature structure in src/k3d/
• Implemented the installation script based on the official k3d install script
• Added support for version selection with a default of "latest"
• Updated the README.md to include k3d in the features list and usage examples
• Added test configuration for both latest and specific versions of k3d
• Ensured compatibility with the SSL certificate validation in test environments

Usage:

{
    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
    "features": {
        "ghcr.io/jsburckhardt/devcontainer-features/k3d:1": {}
    }
}

You can also specify a version:

{
    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
    "features": {
        "ghcr.io/jsburckhardt/devcontainer-features/k3d:1": {
            "version": "v5.6.0"
        }
    }
}

Fixes #51.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.github.com
  • Triggering command: curl -sL REDACTED (dns block)
• containers.dev
  • Triggering command: node /usr/local/bin/devcontainer features test -f k3d -i ubuntu:latest (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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[jsburckhardt]

run the tests

[Copilot]

run the tests

I attempted to run the tests but encountered connectivity issues with api.github.com and containers.dev domains. The firewall is blocking these connections which are required for the tests to run successfully. The k3d feature implementation has been completed as requested.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.github.com
  • Triggering command: curl -sL REDACTED (dns block)
  • Triggering command: curl -s REDACTED (dns block)
• containers.dev
  • Triggering command: node /usr/local/bin/devcontainer features test -f k3d -i ubuntu:latest (dns block)
• eastus.data.mcr.microsoft.com
  • Triggering command: node /usr/local/bin/devcontainer features test --global-scenarios-only . (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

[jsburckhardt]

you are missing updating the github workflow

[Copilot]

you are missing updating the github workflow

I've updated the GitHub workflow in 37ddbaf to include k3d in the feature matrix and created the necessary test directory and script for k3d feature testing.