Multi Cluster Kubernetes MCP Server

An MCP (Model Context Protocol) server application for Kubernetes operations, providing a standardized API to interact with multiple Kubernetes clusters simultaneously using multiple kubeconfig files.

MCPO Server Configuration

Add the following configuration to your MCPO server's config.json file (e.g., in Claude Desktop):

{
  "mcpServers": {
    "kubernetes": {
      "command": "python3",
      "args": ["/path/to/k8s-multicluster-mcp/app.py"],
      "env": {
        "KUBECONFIG_DIR": "/path/to/your/kubeconfigs"
      }
    }
  }
}

Replace /path/to/your/kubeconfigs with the actual path to your kubeconfig files directory.

The server expects multiple kubeconfig files to be placed in the directory you specified. Each kubeconfig file represents a different Kubernetes cluster that you can interact with.

Installation

Prerequisites

Python 3.8 or higher
pip package manager
uv package manager (optional, recommended for faster installation)

Setting up a Local Environment

Clone the repository

git clone https://github.com/razvanmacovei/k8s-multicluster-mcp.git
cd k8s-multicluster-mcp

Create a virtual environment

# Using venv (built-in)
python3 -m venv .venv

# Activate the virtual environment
# On Windows
.venv\Scripts\activate

# On macOS/Linux
source .venv/bin/activate

Install dependencies

# Using pip
pip install -r requirements.txt

# Or using uv (faster)
uv pip install -r requirements.txt

Configure your environment
- Make sure you have your kubeconfig files ready
- Set the KUBECONFIG_DIR environment variable to point to your kubeconfig directory
Run the application
```
python3 app.py
```

Multi-Cluster Management

This MCP server is designed specifically to work with multiple Kubernetes clusters:

Multiple Kubeconfig Files: Place your kubeconfig files in the directory specified by KUBECONFIG_DIR
Context Selection: Easily switch between clusters by specifying the context parameter in your commands
Cross-Cluster Operations: Compare resources, status, and configurations across different clusters
Centralized Management: Manage all your Kubernetes environments (dev, staging, production) from a single interface

Features

The Kubernetes MCP Server provides a comprehensive set of tools for interacting with Kubernetes clusters:

Cluster Management

List available Kubernetes contexts
List namespaces and nodes in a cluster
List and retrieve detailed information about Kubernetes resources
Discover available APIs and Custom Resource Definitions (CRDs)

Resource Management

List and inspect any Kubernetes resource (pods, deployments, services, etc.)
Get logs from pods
Get detailed status information about deployments, statefulsets, and daemonsets
Describe resources with detailed information similar to kubectl describe

Metrics and Monitoring

Display resource usage (CPU/memory) of nodes
Display resource usage (CPU/memory) of pods
Diagnose application issues by checking status, events, and logs

Rollout Management

Get rollout status and history
Undo, restart, pause, and resume rollouts
Scale and autoscale resources
Update resource constraints (CPU/memory limits and requests)

Usage Examples

Here are some examples of how to use the Kubernetes MCP Server with AI assistants:

Multi-Cluster Operations

List all available contexts across my kubeconfig files.

Compare the number of pods running in the 'backend' namespace between my 'prod' and 'staging' contexts.

Show me resource usage across all nodes in my 'dev' and 'prod' clusters.

Diagnose Application Issues

I have a deployment called 'my-app' in the 'production' namespace that's having issues. Can you check what's wrong?

Scale Resources

I need to scale my 'backend' deployment in the 'default' namespace to 5 replicas.

Investigate Resource Usage

Show me the resource usage of nodes in my cluster.

Update Resource Limits

My application 'web-app' in namespace 'web' is experiencing OOM issues. Can you increase the memory limit of the 'app' container to 512Mi?

Rollback Deployment

I need to rollback my 'api-gateway' deployment in the 'services' namespace to the previous version.

Discover API Resources

What APIs are available in my Kubernetes cluster?

Describe Resources

Can you describe the pod 'my-pod' in the 'default' namespace?

Create New Resources

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.21
        ports:
        - containerPort: 80

Expose a Deployment

Expose my 'backend' deployment in the 'default' namespace as a service on port 80 targeting port 8080.

Execute Command in a Pod

Execute the command 'ls -la /app' in the 'app' container of pod 'web-app-1234' in the 'default' namespace.

Node Maintenance

I need to perform maintenance on node 'worker-1'. Please cordon it, drain it, and then uncordon it after I complete my work.

Apply Configuration

Apply this configuration to update my existing deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
  name: existing-deployment
  namespace: default
spec:
  replicas: 3
  template:
    spec:
      containers:
      - name: app
        image: myapp:v2

Patch a Resource

Patch the 'my-configmap' ConfigMap in the 'default' namespace to add a new key 'NEW_SETTING' with value 'enabled'.

Update Labels

Add the label 'environment=production' to the 'api' deployment in the 'backend' namespace.

Implemented Tools

The server implements the following MCP tools:

Core Tools

k8s_get_contexts: List all available Kubernetes contexts
k8s_get_namespaces: List all namespaces in a specified context
k8s_get_nodes: List all nodes in a cluster
k8s_get_resources: List resources of a specified kind
k8s_get_resource: Get detailed information about a specific resource
k8s_get_pod_logs: Get logs from a specific pod
k8s_describe: Show detailed information about a specific resource or group of resources

API Discovery Tools

k8s_apis: List all available APIs in the Kubernetes cluster
k8s_crds: List all Custom Resource Definitions (CRDs) in the cluster

Metrics Tools

k8s_top_nodes: Display resource usage of nodes
k8s_top_pods: Display resource usage of pods

Rollout Management Tools

k8s_rollout_status: Get status of a rollout
k8s_rollout_history: Get revision history of a rollout
k8s_rollout_undo: Undo a rollout to a previous revision
k8s_rollout_restart: Restart a rollout
k8s_rollout_pause: Pause a rollout
k8s_rollout_resume: Resume a paused rollout

Scaling Tools

k8s_scale_resource: Scale a resource to a specified number of replicas
k8s_autoscale_resource: Configure a Horizontal Pod Autoscaler (HPA)
k8s_update_resources: Update resource requests and limits

Diagnostic Tools

k8s_diagnose_application: Diagnose issues with an application

Resource Creation and Management Tools

k8s_create_resource: Create a Kubernetes resource from YAML/JSON content
k8s_apply_resource: Apply a configuration to a resource (create or update)
k8s_patch_resource: Update fields of a resource
k8s_label_resource: Update the labels on a resource
k8s_annotate_resource: Update the annotations on a resource

Workload Management Tools

k8s_expose_resource: Expose a resource as a new Kubernetes service
k8s_set_resources_for_container: Set resource limits and requests for containers

Node Management Tools

k8s_cordon_node: Mark a node as unschedulable
k8s_uncordon_node: Mark a node as schedulable
k8s_drain_node: Drain a node in preparation for maintenance
k8s_taint_node: Update the taints on a node
k8s_untaint_node: Remove taints from a node

Pod Operations Tools

k8s_pod_exec: Execute a command in a container

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.