How do I structure modules for Circuit breakers in Salt?

Circuit breakers are essential in maintaining system stability and performance in distributed architectures. When failures occur, circuit breakers prevent the application from making repeated requests that are likely to fail, thereby allowing the system to recover. In SaltStack, structuring modules for circuit breakers requires careful consideration to ensure they integrate seamlessly with your infrastructure.

// Example of a simple circuit breaker module in Salt
class CircuitBreaker:
    def __init__(self, threshold, timeout):
        self.threshold = threshold
        self.timeout = timeout
        self.failure_count = 0
        self.is_open = False
        self.last_fail_time = None
    
    def call(self, func):
        if self.is_open:
            if time() - self.last_fail_time > self.timeout:
                self.is_open = False  // Reset the circuit
            else:
                raise Exception("Circuit is open")

        try:
            result = func()
            self.failure_count = 0  // Reset failure count on success
            return result
        except Exception as e:
            self.failure_count += 1
            self.last_fail_time = time()
            if self.failure_count >= self.threshold:
                self.is_open = True  // Open the circuit on failure threshold
            raise e