Solution Design: /ping Endpoint

Purpose

The /ping endpoint serves as a lightweight health check for the identity-backend service.

  • Returns a simple "OK" response to confirm the service is running.

  • Also logs the ping event for uptime monitoring and service availability metrics.

Usage

Endpoint:

GET /ping

Behavior

  1. Health Confirmation

    • Returns 200 OK with plain text response "OK".

    • Indicates the Flask application and runtime environment are operational.

  2. Logging

    • Each ping request is logged via unified_log:

      • Captures timestamp, service name, and level INFO.

      • Useful for uptime monitoring tools or manual checks.

  3. Environment Validation

    • Often paired with /debug-env to ensure JWT_SECRET_KEY and JWT_ISSUER are properly set across microservices:

      • JWT_SECRET_KEY: Shared secret used to sign/validate JWTs.

      • JWT_ISSUER: Must consistently equal identity-backend.

Response Example

OK

Operational Role

  • Uptime Monitoring
    Can be queried by load balancers, uptime robots, or cPanel checks.

  • First Diagnostic Step
    When debugging inter-service authentication issues, confirming /ping response ensures the service itself is alive before checking token logic.

  • Secret Sync Check
    Combined with /debug-env, helps diagnose mismatched secrets between identity and downstream services (e.g., logging-backend).


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