metrics

var (
	// Errors tracks http status codes for problematic requests.
	Errors = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "errors_total",
			Help: "Number of upstream errors",
		},
		[]string{"status"},
	)

	// Func tracks time spent in a function.
	Func = prometheus.NewSummaryVec(
		prometheus.SummaryOpts{
			Name: "function_microseconds",
			Help: "function timing.",
		},
		[]string{"route"},
	)

	// DB tracks timing of interactions with the file system.
	DB = prometheus.NewSummaryVec(
		prometheus.SummaryOpts{
			Name: "db_microseconds",
			Help: "db timing.",
		},
		[]string{"what"},
	)
)