prometheus

I like to start observability with two metrics: request duration and response codes. The wrapper below intercepts WriteHeader to capture status codes and then records both a histogram observation and a counter increment. The biggest gotcha is label ca

Prometheus collects and stores time-series metrics via a pull model. It scrapes /metrics endpoints at configured intervals. The prometheus.yml defines scrape_configs with target discovery. static_configs list fixed targets while kubernetes_sd_configs