package instance import ( "github.com/google/trillian/monitoring" "github.com/google/trillian/monitoring/prometheus" ) var ( reqcnt monitoring.Counter // number of incoming http requests rspcnt monitoring.Counter // number of valid http responses latency monitoring.Histogram // request-response latency ) func init() { mf := prometheus.MetricFactory{} reqcnt = mf.NewCounter("http_req", "number of http requests", "logid", "endpoint") rspcnt = mf.NewCounter("http_rsp", "number of http requests", "logid", "endpoint", "status") latency = mf.NewHistogram("http_latency", "http request-response latency", "logid", "endpoint", "status") }