The HAProxy Kubernetes Ingress Controller publishes two sets of logs: the ingress controller logs and the HAProxy access logs. After you install the HAProxy Kubernetes Ingress Controller, logging jumps to mind as one of the first features to configure. Logs will tell you whether the controller has started up correctly and which version of the controller you’re running, and they will assist in pinpointing any user experience issues.

HAProxy publishes more than 100 metrics about the traffic flowing through it. When you use HAProxy as an API gateway, these give you insight into how clients are accessing your APIs. Several metrics come to mind as particularly useful, since they can help you determine whether you’re meeting your service-level objectives and can detect issues with your services early on. Let’s discuss several that might come in handy.

Your HAProxy load balancer may only ever need to relay traffic for a single domain name, but HAProxy can handle two, ten, or even ten million routing rules without breaking a sweat.