Circuit Breaker

Scope

To implement a circuit breaker that trips the circuit when the drop rate in a service is higher than a defined parameter. Also implements the immediate restore logic when recovering from a tripped state.

Setup

pip install -r /path/to/requirements.txt

Usage

1. Download the cb module
2. Run a redis server instance redis-server
3. Import the circuitBreaker module into your code

from cb.circuitbreaker import circuitBreaker

3. Create a circuitBreaker object

cb = circuitBreaker()

4. Instead of standard http requests, use cb.getReq or cb.postReq
5. Takes care drops and runs restore when needed. Change configs in cb/config.py to customize

Technologies Used

• Python
• Flask
• SQLAlchemy
• redis
• boto SQS
• Celery