mcp-k8s

mcp-k8s

A Kubernetes MCP (Model Control Protocol) server that enables interaction with Kubernetes clusters through MCP tools.

Features

• Query supported Kubernetes resource types (built-in resources and CRDs)
• Perform CRUD operations on Kubernetes resources
• Configurable write operations (create/update/delete can be enabled/disabled independently)
• Connects to Kubernetes cluster using kubeconfig

Preview

Interaction through cursor

Use Cases

1. Kubernetes Resource Management via LLM

• Interactive Resource Management: Manage Kubernetes resources through natural language interaction with LLM, eliminating the need to memorize complex kubectl commands
• Batch Operations: Describe complex batch operation requirements in natural language, letting LLM translate them into specific resource operations
• Resource Status Queries: Query cluster resource status using natural language and receive easy-to-understand responses

2. Automated Operations Scenarios

• Intelligent Operations Assistant: Serve as an intelligent assistant for operators in daily cluster management tasks
• Problem Diagnosis: Assist in cluster problem diagnosis through natural language problem descriptions
• Configuration Review: Leverage LLM's understanding capabilities to help review and optimize Kubernetes resource configurations

3. Development and Testing Support

• Quick Prototype Validation: Developers can quickly create and validate resource configurations through natural language
• Environment Management: Simplify test environment resource management, quickly create, modify, and clean up test resources
• Configuration Generation: Automatically generate resource configurations that follow best practices based on requirement descriptions

4. Education and Training Scenarios

• Interactive Learning: Newcomers can learn Kubernetes concepts and operations through natural language interaction
• Best Practice Guidance: LLM provides best practice suggestions during resource operations
• Error Explanation: Provide easy-to-understand error explanations and correction suggestions when operations fail

Architecture

1. Project Overview

An stdio-based MCP server that connects to Kubernetes clusters and provides the following capabilities:

• Query Kubernetes resource types (including built-in resources and CRDs)
• CRUD operations on Kubernetes resources (with configurable write operations)

2. Technical Stack

• Go
• mcp-go SDK
• Kubernetes client-go library
• Stdio for communication

3. Core Components

1. MCP Server: Uses mcp-go's server package to create an stdio-based MCP server
2. K8s Client: Uses client-go to connect to Kubernetes clusters
3. Tool Implementations: Implements various MCP tools for different Kubernetes operations

4. Available Tools

Resource Type Query Tools

• get_api_resources: Get all supported API resource types in the cluster

Resource Operation Tools

• get_resource: Get detailed information about a specific resource
• list_resources: List all instances of a resource type
• create_resource: Create new resources (can be disabled)
• update_resource: Update existing resources (can be disabled)
• delete_resource: Delete resources (can be disabled)

Usage

mcp-k8s supports two communication modes:

1. Stdio Mode (Default)

In stdio mode, mcp-k8s communicates with the client through standard input/output streams. This is the default mode and is suitable for most use cases.

# Run in stdio mode (default)
{
    "mcpServers":
    {
        "mcp-k8s":
        {
            "command": "/path/to/mcp-k8s",
            "args":
            [
                "-kubeconfig",
                "/path/to/kubeconfig",
                "-enable-create",
                "-enable-delete",
                "-enable-update",
                "-enable-list"
            ]
        }
    }
}

2. SSE Mode

In SSE (Server-Sent Events) mode, mcp-k8s exposes an HTTP endpoint to mcp client. You can deploy the service on a remote server (but you need to pay attention to security)

# Run in SSE mode
./bin/mcp-k8s -kubeconfig=/path/to/kubeconfig -transport=sse -port=8080 -host=localhost -enable-create -enable-delete -enable-list -enable-update
# This command will open all operations

mcp config

{
  "mcpServers": {
    "mcp-k8s": {
      "url": "http://localhost:8080/sse",
      "args": []
    }
  }
}

SSE mode configuration:

• -transport: Set to "sse" to enable SSE mode
• -port: HTTP server port (default: 8080)
• --host: HTTP server host (default: "localhost")

Getting Started

Direct Usage

You can directly download the binary for your platform from the releases page and use it immediately.

Build

git clone https://github.com/silenceper/mcp-k8s.git
cd mcp-k8s
go build -o bin/mcp-k8s cmd/server/main.go

Command Line Arguments

• -kubeconfig: Path to Kubernetes configuration file (uses default config if not specified)
• -enable-create: Enable resource creation operations (default: false)
• -enable-update: Enable resource update operations (default: false)
• -enable-delete: Enable resource deletion operations (default: false)
• -enable-list: Enable resource list operations (default: true)
• -transport: Transport type (stdio or sse) (default: "stdio")
• -host: Host for SSE transport (default "localhost")
• -port: TCP port for SSE transport (default 8080)

Integration with MCP Clients

mcp-k8s is an stdio-based MCP server that can be integrated with any MCP-compatible LLM client. Refer to your MCP client's documentation for integration instructions.

Security Considerations

• Write operations are strictly controlled through independent configuration switches
• Uses RBAC to ensure K8s client has only necessary permissions
• Validates all user inputs to prevent injection attacks

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