Health Probes Should Not Follow Redirects Blindly
A probe that follows a redirect can report success for the wrong endpoint and hide an authentication or routing failure.
health checks
When a Health Check Fails Every Dependency at Once
Restarting a service whenever one of its dependencies is temporarily unhealthy is not always helpful. An external failure may not be fixed by restarting the application, and useful in-flight work can be lost in the process.
Caddy Says My Upstream Is Unhealthy, but the App Is Fine
A synthetic health request measures the service only if it looks like a request the service considers valid.
A CSP Can Break a Health Dashboard Without Breaking the Server
Browser security policy is part of application behavior; a blocked fetch can make a healthy backend look unreachable.
The Process Is Running, but Is the Service Useful?
A running process is useful information, but it does not prove the process is completing the work it exists to do. A web server can be alive while its required database is unreachable.