Question 1

How to add a custom health check for a Redis cache in Go?

Accepted Answer

Implement the Checker interface with a function that tests the Redis connection, similar to the database example in the README using PingContext, and integrate it with healthcheck.Handler.

Question 2

Healthcheck vs go-health: which is better for Go microservices?

Accepted Answer

Healthcheck excels in simplicity and concurrent checks with flexible error handling, while go-health might offer more pre-built checkers; choose based on whether you prioritize extensibility or out-of-the-box features.

Question 3

How to set a timeout to prevent health checks from hanging?

Accepted Answer

Use the WithTimeout option when creating the handler, as shown in the example with a 5-second timeout, to ensure checks don't block indefinitely.

Question 4

Does healthcheck support monitoring external API dependencies?

Accepted Answer

Yes, you can create a custom checker that makes HTTP requests to external APIs and checks responses, implementing the Checker interface to include it in the health endpoint.

Question 5

What's the best way to distinguish critical and non-critical services in healthcheck?

Accepted Answer

Use checkers for critical dependencies that fail the overall status on error, and observers for non-critical ones that don't, as demonstrated with the diskspace observer in the README.

Question 6

How to integrate healthcheck with Kubernetes liveness probes?

Accepted Answer

Expose the healthcheck endpoint on a specific port and configure Kubernetes to hit it; the library's accurate dependency testing ensures pods are rotated based on real health status.

healthcheck

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