NewCounter creates a Counter metrics under the global namespace returns nop if metrics are disabled.

NewGauge creates a Gauge metrics under the global namespace returns nop if metrics are disabled.

NewHistogram creates a Histogram metrics under the global namespace returns nop if metrics are disabled.

NewHistogramWithBuckets creates a Histogram metrics with custom buckets.

ReportMessageLatency records the latency for the given protocol and message type, if the protocol consists only of a single message then the protocol should be provided as the message type.

StartMetricsServer begins listening and supplying metrics on localhost:`metricsPort`/metrics.

StartPushingMetrics begins pushing metrics to the url specified by the --metrics-push flag with period specified by the --metrics-push-period flag.

Namespace is the basic namespace where all metrics are defined under.