k8s-mcp-extension 0.1.0

MCP server for Kubernetes command execution, node inspection, and diagnostics

K8s MCP Server

MCP server for Kubernetes command execution, node inspection, and node-level diagnostics. Extension of k8s-mcp-server by alexei-led.

Features

• validated wrappers around kubectl, helm, istioctl, and argocd
• node-aware kubeconfig selection through K8S_NODE_PREFIX_MAPPING
• run_checkup_on_node for kubectl node-shell ... checkup -n
• get_logs_on_node for collecting dmesg, journalctl, /var/log/*, and /var/crash
• Kubernetes node inspection tools for status, labels, pods, and resources

Configuration

Set K8S_NODE_PREFIX_MAPPING to a JSON object that maps a node prefix to a kubeconfig file name:

{
  "node-a": "cluster-a.config",
  "edge": "edge-cluster.config"
}

The kubeconfig files are resolved relative to K8S_KUBECONFIG_DIR, which defaults to ~/.kube.

Example MCP Client Configuration

{
  "mcpServers": {
    "k8s-server": {
      "command": "k8s-mcp-server",
      "cwd": "/absolute/path/to/project",
      "env": {
        "K8S_KUBECONFIG_DIR": "/path/to/.kube",
        "K8S_NODE_PREFIX_MAPPING": "{\"node-a\": \"cluster-a.config\", \"edge\": \"edge-cluster.config\"}",
        "K8S_MCP_TIMEOUT": "600"
      }
    }
  }
}

Development

Create the environment and run checks:

uv sync --extra dev
.venv/bin/python -m pytest
.venv/bin/python -m ruff check

Run the server locally:

.venv/bin/python -m k8s_mcp_server