Ceph Max Storage Calculator

A modern web application for calculating the maximum allowed storage usage in a Ceph cluster.

Features

• Calculation of maximum storage usage based on Ceph documentation
• Support for Replication and Erasure Coding
• Dynamic addition and removal of nodes and OSDs
• User-friendly interface with modern design
• Dark/Light Mode support
• Export/Import of configurations
• PDF report generation
• Responsive design for all devices
• Fault tolerance analysis for nodes and OSDs

Installation

1. Clone repository:

   git clone <repository-url>
   cd ceph-calculator
   

2. Set up Python environment:

   python -m venv venv
   venv\Scripts\activate  # Windows
   source venv/bin/activate  # Linux/Mac
   

3. Install dependencies:

   pip install -r requirements.txt
   

4. Start application:

   python run.py
   

5. Open in a browser: http://localhost:5000

Usage

1. Select the replication type: Replication or Erasure Coding
2. Enter the corresponding parameters:
   • For Replication: Number of replicas and min_size
   • For Erasure Coding: k (data chunks) and m (coding chunks)
3. Add nodes and configure their OSDs with appropriate storage sizes
4. Select the desired storage unit (GB/TB)
5. Click on "Calculate Capacity" to see the result
6. Optional: Export the configuration or generate a PDF report

Technology

• Backend: Flask
• Frontend:
  • Alpine.js for reactive user interface
  • Tailwind CSS for modern design
  • HTMX for interactive elements
• Dark/Light Mode with Tailwind CSS
• PDF generation with ReportLab
• Responsive design for all devices

Detailed Features

Replication

• Configurable number of replicas (1-10)
• Adjustable min_size for I/O operations
• Automatic calculation of fault tolerance

Erasure Coding

• Configurable k/m values
• Optimized storage usage
• Fault tolerance analysis

Fault Tolerance Analysis

• Node fault tolerance
• OSD fault tolerance
• Multi-node fault tolerance
• Detailed information about storage usage after failures

User-Friendliness

• Intuitive user interface
• Dark/Light Mode
• Tooltips with explanations
• Responsive design
• Export/Import of configurations
• PDF report generation

Note

The calculations are based on general recommendations from the Ceph documentation and serve as a guideline. For precise capacity planning, you should consult the Ceph documentation and consider your specific cluster requirements.