# Run directly without installation (latest version)
uvx ebs-initializer-mcp@latest

# Or run specific version
uvx ebs-initializer-mcp==0.7.10

# Install globally
uv tool install ebs-initializer-mcp

# Upgrade to latest version
uvx --upgrade ebs-initializer-mcp

uvx --from git+https://github.com/username/ebs-init-mcp.git ebs-mcp-server

{
  "mcpServers": {
    "ebs-initializer": {
      "command": "uvx",
      "args": ["ebs-initializer-mcp@latest"],
      "env": {
        "AWS_REGION": "us-west-2"
      }
    }
  }
}

# Single instance
"Initialize all EBS volumes for instance i-1234567890abcdef0 using fio"

# Multiple instances (comma-separated)
"Initialize all EBS volumes for instances i-1234567890abcdef0,i-0987654321fedcba0 using fio"

# Specific volume
"Initialize volume vol-1234567890abcdef0 using fio"

# Check status
"Check the status of the initialization command 12345678-1234-1234-1234-123456789012"

# Cancel operation
"Cancel the initialization command 12345678-1234-1234-1234-123456789012"

{
  "command_id": "...",
  "status": "InProgress",
  "execution_start_time": "2025-09-10 01:18:21.418000+00:00",
  "progress_percentage": 50.0,
  "progress_bar": "[██████████░░░░░░░░░░] 50.0%",
  "estimated_remaining_minutes": 5.2,
  "message": "🔄 50.0% Complete..."
}

{
  "status": "initialization_started",
  "command_id": "4044d07e-c10c-4caf-b5b7-eee8435ac1c7",
  "target_instances": ["i-0fe60964746c77041", "i-0a824284f8c887f4a"],
  "total_instances": 2,
  "instance_estimations": {
    "i-0fe60964746c77041": {
      "estimated_minutes": 1.09,
      "volume_count": 1,
      "total_gb": 8,
      "instance_type": "t3.xlarge"
    },
    "i-0a824284f8c887f4a": {
      "estimated_minutes": 6.89,
      "volume_count": 3,
      "total_gb": 208,
      "instance_type": "m5.4xlarge"
    }
  },
  "total_estimated_minutes": 6.89
}

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeVolumes",
                "ec2:DescribeInstances",
                "ssm:SendCommand",
                "ssm:GetCommandInvocation",
                "ssm:PutParameter",
                "ssm:GetParameter",
                "ssm:DeleteParameter"
            ],
            "Resource": "*"
        }
    ]
}

# Option 1: AWS_DEFAULT_REGION (preferred)
export AWS_DEFAULT_REGION=ap-northeast-2

# Option 2: AWS_REGION (also supported)  
export AWS_REGION=ap-northeast-2

{
  "mcpServers": {
    "ebs-initializer": {
      "command": "uvx",
      "args": ["ebs-initializer-mcp@latest"],
      "env": {
        "AWS_DEFAULT_REGION": "ap-northeast-2"
      }
    }
  }
}

src/ebs_init_mcp/
├── server.py           # MCP server and tool definitions (430 lines)
├── aws_clients.py      # AWS client caching and management
├── throughput.py       # EBS throughput calculation
├── estimation.py       # Time estimation algorithms
├── initialization.py   # Command generation for volume initialization
├── status.py          # Status checking and progress calculation
└── utils.py           # Utility functions and device mapping scripts

# Step 1: Get instance EBS throughput
instance_throughput = get_instance_ebs_throughput(instance_type)

# Step 2: Collect volume data
volumes = [{'size_gb': size, 'max_throughput_mbps': vol_throughput}...]

# Step 3: AWS EBS throughput allocation algorithm
while volumes_remaining:
    total_demand = sum(vol_throughput for each volume)
    
    if total_demand <= instance_throughput:
        # Each volume gets its maximum throughput
        allocated_throughputs = [vol_max_throughput for each volume]
    else:
        # AWS EBS allocation: smaller volumes get priority
        fair_share = instance_throughput / len(volumes_remaining)
        
        # First pass: allocate full throughput to volumes <= fair_share
        for volume in volumes_remaining:
            if volume.max_throughput <= fair_share:
                volume.allocated = volume.max_throughput
                remaining_throughput -= volume.max_throughput
        
        # Second pass: distribute remaining among larger volumes
        remaining_large_volumes = volumes with throughput > fair_share
        throughput_per_large = remaining_throughput / len(remaining_large_volumes)
        for volume in remaining_large_volumes:
            volume.allocated = throughput_per_large
    
    # Calculate completion times and process next step
    completion_times = [(size * 1024) / allocated_throughput / 60 for each volume]

# Step 1: Get throughput constraints
instance_throughput = get_instance_ebs_throughput(instance_type)
volume_throughput = volume.get('Throughput', 1000)

# Step 2: Calculate effective throughput (bottleneck)
effective_throughput = min(volume_throughput, instance_throughput)

# Step 3: Linear time calculation
estimated_minutes = (size_gb * 1024 MB) / effective_throughput / 60

git clone <repository>
cd ebs-init-mcp

# Install dependencies
uv sync

# Run development server
AWS_REGION=ap-northeast-2 uv run mcp dev src/ebs_init_mcp/server.py

# Run tests
uv run pytest

# Format code
uv run ruff format src/
uv run ruff check src/