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Chaos Mesh MCP Server

A Model Context Protocol (MCP) server for Chaos Mesh fault injection, optimized for AWS EKS environments with full namespace support.

Features

• Pod Fault Injection: Kill pods, inject failures, stress CPU/memory
• Network Chaos: Simulate network delays, partitions, bandwidth limits
• Host-level Chaos: CPU/memory stress, disk operations on nodes
• EKS Optimized: Enhanced support for AWS EKS with proper RBAC and authentication
• Namespace Support: All tools support custom namespaces
• Improved Error Handling: Detailed error messages and retry mechanisms
• Health Monitoring: Built-in health checks and diagnostics
• uvx Integration: Simplified installation and dependency management with uvx

EKS Authentication Methods

There are two ways to authenticate the MCP server with your EKS cluster:

Method 1: Static Service Account Token (Recommended)

Generated by running the setup script — produces a self-contained kubeconfig with a long-lived ServiceAccount token. No AWS CLI or IAM credentials required at runtime.

# Run once to create RBAC + generate kubeconfig
./setup-eks-permissions.sh

# Start the server with the generated kubeconfig
python server.py --kubeconfig ./chaos-mesh-mcp-kubeconfig

Pros: Portable, no AWS dependency at runtime, least-privilege permissions (Chaos Mesh only) Cons: Token has a fixed expiry (default 1 year), needs renewal

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Method 2: Admin kubeconfig with exec-based Auth

If a cluster admin provides their kubeconfig (typically generated by aws eks update-kubeconfig), the server can use it directly. This format uses aws eks get-token to obtain a token on each request.

# Start the server with an admin-provided kubeconfig
python server.py --kubeconfig /path/to/admin-kubeconfig

Or set via environment variable:

export KUBECONFIG=/path/to/admin-kubeconfig
python server.py

Requirements:

• aws CLI must be installed on the machine running the MCP server
• The machine must have valid AWS credentials (IAM role / ~/.aws/credentials)
• The IAM identity must be mapped in the EKS aws-auth ConfigMap

Pros: Uses existing admin credentials, no extra setup needed Cons: Depends on AWS CLI + IAM credentials, admin-level permissions (overly broad)

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Recommendation: Use Method 1 for production. Use Method 2 for quick testing when an admin kubeconfig is available.

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Quick Start with uvx (Recommended)

1. One-time Environment Setup

cd /home/ec2-user/mcp-servers/Chaosmesh-MCP

# Run the uvx setup script (includes EKS permissions and kubeconfig generation)
./setup-uvx.sh

This script will:

• Install Chaos Mesh (if not present)
• Create necessary RBAC permissions
• Generate chaos-mesh-mcp-kubeconfig file with service account credentials
• Create environment configuration for uvx
• Verify the setup

2. MCP Configuration

Add to your ~/.aws/amazonq/mcp.json:

{
  "mcpServers": {
    "chaosmesh-mcp": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/RadiumGu/Chaosmesh-MCP.git",
        "chaosmesh-mcp",
        "--kubeconfig",
        "/home/ec2-user/mcp-servers/Chaosmesh-MCP/chaos-mesh-mcp-kubeconfig",
        "--skip-env-check",
        "--transport",
        "stdio"
      ],
      "env": {
        "KUBECONFIG": "/home/ec2-user/mcp-servers/Chaosmesh-MCP/chaos-mesh-mcp-kubeconfig",
        "AWS_REGION": "us-east-2"
      },
      "autoApprove": [],
      "disabled": false,
      "transportType": "stdio"
    }
  }
}

3. Start Using

Restart your Amazon Q CLI session:

# Exit current session
/quit

# Restart
q chat

The MCP server will now run automatically via uvx when needed!

Alternative: Manual Setup (Legacy)

If you prefer the traditional approach or need to troubleshoot:

1. Clone and Setup Environment

git clone https://github.com/RadiumGu/Chaosmesh-MCP.git
cd Chaosmesh-MCP/
uv venv
source .venv/bin/activate
uv sync

2. Generate Kubeconfig

# Make the setup script executable
chmod +x setup-eks-permissions.sh

# Run the setup script to generate kubeconfig and configure permissions
./setup-eks-permissions.sh

3. Start MCP Server

# Use the generated kubeconfig
export KUBECONFIG=./chaos-mesh-mcp-kubeconfig
uv run python server.py --kubeconfig ./chaos-mesh-mcp-kubeconfig

uvx vs Manual Installation

uvx Advantages (Recommended):

• ✅ Automatic dependency management: No need to manage Python environments
• ✅ Direct from Git: Always uses latest version from repository
• ✅ Version isolation: Clean environment for each run
• ✅ Simplified maintenance: No manual virtual environment management
• ✅ One-time setup: Just run ./setup-uvx.sh once

Manual Installation:

• ⚠️ Requires manual dependency management
• ⚠️ Need to sync repository updates manually
• ⚠️ Virtual environment maintenance required
• ✅ More control over the environment
• ✅ Easier for development and debugging

Troubleshooting Setup

If you encounter issues:

1. Missing kubeconfig file: Run ./setup-uvx.sh or ./setup-eks-permissions.sh
2. Permission errors: Ensure your AWS credentials have EKS access
3. Connection issues: Verify kubectl can access your cluster
4. uvx issues: Check if uvx is installed: uvx --version

For detailed setup instructions, see SETUP.md and UVX-USAGE.md.

Namespace Support

All Chaos Mesh MCP tools now support specifying custom namespaces:

Available Tools with Namespace Support

• pod_kill(service, duration, mode, value, namespace="default")
• pod_failure(service, duration, mode, value, namespace="default")
• pod_cpu_stress(service, duration, mode, value, container_names, workers, load, namespace="default")
• pod_memory_stress(service, duration, mode, value, container_names, size, time, namespace="default")
• container_kill(service, duration, mode, value, container_names, namespace="default")
• network_partition(service, mode, value, direction, external_targets, namespace="default")
• network_bandwidth(service, mode, value, direction, rate, limit, buffer, external_targets, namespace="default")
• delete_experiment(type, name, namespace="default")
• inject_delay_fault(service, delay, namespace="default")
• remove_delay_fault(service, namespace="default")

New Namespace Management Tools

• list_namespaces(): List all available namespaces
• list_services_in_namespace(namespace="default"): List services in a specific namespace
• health_check(): Check system health

Example Usage

# List all namespaces
namespaces = list_namespaces()

# List services in votingapp namespace
services = list_services_in_namespace("votingapp")

# Kill 50% of votingapp pods in votingapp namespace for 30 seconds
pod_kill(
    service="votingapp",
    duration="30s", 
    mode="fixed-percent",
    value="50",
    namespace="votingapp"
)

# Apply CPU stress in production namespace
pod_cpu_stress(
    service="api-service",
    duration="2m",
    mode="fixed",
    value="2",
    container_names=["api"],
    workers=2,
    load=80,
    namespace="production"
)

# Check system health
health_status = health_check()

Installation

Prerequisites

• uvx: Python package runner (recommended)
• kubectl: Configured for your cluster
• Helm: For Chaos Mesh installation
• AWS CLI: For EKS environments
• Python 3.10+: Required by uvx

uvx Installation (Recommended)

# Install uvx if not already installed
pip install uvx

# Run one-time setup
cd /home/ec2-user/mcp-servers/Chaosmesh-MCP
./setup-uvx.sh

uvx will automatically handle all Python dependencies:

• chaos-mesh>=1.2.13
• kubernetes>=32.0.1
• mcp[cli]>=1.7.1

Manual Installation (Alternative)

# Clone repository
git clone https://github.com/RadiumGu/Chaosmesh-MCP.git
cd Chaosmesh-MCP/

# Setup Python environment
uv venv
source .venv/bin/activate
uv sync

# Install dependencies manually
pip install chaos-mesh>=1.2.13 kubernetes>=32.0.1 mcp[cli]>=1.7.1

Configuration

uvx Configuration (Recommended)

For uvx-based deployment, use the automated setup:

./setup-uvx.sh

This script will:

• Install Chaos Mesh if not present
• Create necessary RBAC permissions with cross-namespace support
• Generate a service account kubeconfig
• Create environment configuration for uvx
• Verify the setup

EKS Environment (Manual)

For manual AWS EKS cluster setup:

./setup-eks-permissions.sh

This script will:

• Install Chaos Mesh if not present
• Create necessary RBAC permissions with cross-namespace support
• Generate a service account kubeconfig
• Verify the setup

Manual Configuration

1. Install Chaos Mesh:

   helm repo add chaos-mesh https://charts.chaos-mesh.org
   helm install chaos-mesh chaos-mesh/chaos-mesh -n chaos-mesh --create-namespace
   

2. Apply RBAC:

   kubectl apply -f rbac-config.yaml
   

Troubleshooting

Common Issues

1. uvx Command Not Found:

   pip install uvx
   

2. Connection Timeouts:

   • Check Chaos Mesh installation
   • Verify RBAC permissions
   • Use health_check() tool

3. Permission Denied:

   • Apply RBAC configuration
   • Use service account kubeconfig
   • Re-run ./setup-uvx.sh

4. Service Not Found:

   • Verify service name and namespace
   • Use list_services_in_namespace() to check available services
   • Check label selectors

5. Namespace Issues:

   • Use list_namespaces() to see available namespaces
   • Ensure namespace exists before running experiments

6. uvx Installation Issues:

   • Check if kubeconfig exists: ls -la /home/ec2-user/mcp-servers/Chaosmesh-MCP/chaos-mesh-mcp-kubeconfig
   • Verify Kubernetes connection: kubectl get pods -n chaos-mesh
   • Re-run setup: ./setup-uvx.sh

Debug Mode

For uvx (automatic via MCP configuration):

"env": {
  "KUBECONFIG": "/home/ec2-user/mcp-servers/Chaosmesh-MCP/chaos-mesh-mcp-kubeconfig",
  "AWS_REGION": "us-east-2",
  "DEBUG": "true"
}

For manual mode:

python server.py --skip-env-check --kubeconfig ./chaos-mesh-mcp-kubeconfig

Logs

Check Chaos Mesh controller logs:

kubectl logs -n chaos-mesh -l app.kubernetes.io/name=chaos-mesh

Check experiments across namespaces:

kubectl get podchaos --all-namespaces

Migration from Manual to uvx

If migrating from manual installation, see MIGRATION-TO-UVX.md for detailed instructions.

Architecture

┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│   MCP Client    │────│  Chaos Mesh MCP │────│   Kubernetes    │
│                 │    │     Server       │    │    Cluster      │
└─────────────────┘    └──────────────────┘    └─────────────────┘
                                │
                                │
                       ┌──────────────────┐
                       │   Chaos Mesh     │
                       │   Controllers    │
                       └──────────────────┘

Security

• Uses dedicated service account with minimal permissions
• Supports cross-namespace operations with proper RBAC
• Token-based authentication for EKS
• Namespace isolation support
• Audit logging support

Best Practices

1. Use service accounts: Avoid using personal credentials
2. Namespace isolation: Use different namespaces for different environments
3. Monitor experiments: Regularly check experiment status across namespaces
4. Clean up resources: Delete completed experiments promptly
5. Detailed logging: Enable verbose logging for troubleshooting

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test in EKS environment with multiple namespaces
5. Submit a pull request

License

This project is licensed under the MIT License.

Support

For issues and questions:

1. Check the troubleshooting section above
2. Review logs and health status
3. Consult the documentation:
   • EKS Setup Guide
   • General Setup Guide
   • uvx Usage Guide
   • Migration Guide
4. Use namespace management tools for debugging
5. Check the GitHub Issues page

Documentation

• README.md - This file, main documentation
• SETUP.md - Detailed setup instructions
• EKS-SETUP.md - EKS-specific setup guide
• UVX-USAGE.md - uvx installation and usage guide
• MIGRATION-TO-UVX.md - Migration from manual to uvx