Module health 

Health monitoring and resilience infrastructure for RingKernel.

This module provides production-ready health and resilience features:

• Health Checks - Kernel liveness and readiness probes
• Circuit Breakers - Fault isolation and recovery
• Retry Policies - Configurable retry with backoff
• Graceful Degradation - Load shedding and fallback modes
• Watchdog - Automatic kernel health monitoring

Usage

use ringkernel_core::health::{HealthChecker, CircuitBreaker, RetryPolicy};

// Create health checker
let checker = HealthChecker::new()
    .liveness_check("kernel_alive", || async { true })
    .readiness_check("queue_ready", || async { queue_depth < 1000 });

// Create circuit breaker
let breaker = CircuitBreaker::new()
    .failure_threshold(5)
    .recovery_timeout(Duration::from_secs(30));

// Execute with circuit breaker
let result = breaker.execute(|| async { risky_operation() }).await;

Structs

CircuitBreaker

Circuit breaker for fault isolation.

CircuitBreakerConfig

Circuit breaker configuration.

CircuitBreakerStats

Circuit breaker statistics.

DegradationManager

Graceful degradation manager.

DegradationStats

Degradation statistics.

HealthCheck

A health check definition.

HealthCheckResult

Result of a health check.

HealthChecker

Health checker that manages multiple health checks.

KernelHealth

Kernel health status for watchdog.

KernelWatchdog

Watchdog for monitoring kernel health.

LoadSheddingPolicy

Load shedding policy.

RecoveryAction

A recovery action to be taken.

RecoveryConfig

Configuration for automatic recovery.

RecoveryConfigBuilder

Builder for recovery configuration.

RecoveryManager

Manager for automatic kernel recovery.

RecoveryResult

Result of a recovery action.

RecoveryStatsSnapshot

Snapshot of recovery statistics.

RetryPolicy

Retry policy configuration.

Enums

BackoffStrategy

Backoff strategy for retries.

CircuitState

Circuit breaker state.

DegradationLevel

Degradation level for system operation.

FailureType

Types of kernel failures.

HealthStatus

Health status of a component.

RecoveryPolicy

Recovery policy for handling kernel failures.

Type Aliases

HealthCheckFn

Type alias for async health check functions.

RecoveryHandler

Type alias for recovery handler functions.