package stfe 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 lastSdiTimestamp monitoring.Gauge // unix timestamp from the most recent sdi lastSthTimestamp monitoring.Gauge // unix timestamp from the most recent sth lastSthSize monitoring.Gauge // tree size of most recent sth ) 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") lastSthTimestamp = mf.NewGauge("last_sth_timestamp", "unix timestamp while handling the most recent sth", "logid") lastSdiTimestamp = mf.NewGauge("last_sdi_timestamp", "unix timestamp while handling the most recent sdi", "logid") lastSthSize = mf.NewGauge("last_sth_size", "most recent sth tree size", "logid") }