health-check-endpoints
Health Check Endpoints
Implement health checks for monitoring service availability and readiness.
Probe Types
| Probe | Purpose | Failure Action |
|---|---|---|
| Liveness | Is process alive? | Restart container |
| Readiness | Can handle traffic? | Remove from LB |
| Startup | Has app started? | Delay other probes |
| Deep | All deps healthy? | Trigger alerts |
Implementation (Express)
class HealthChecker {
async checkDatabase() {
const start = Date.now();
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