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plugin/proxy: fix metrics (#1137)

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Add Counter metrics and fix duration to use upstream name (and only use
it when we have one).

Fix the documentation to reflect this.

Fixes #1134
This commit is contained in:
Miek Gieben 2017-10-08 04:30:44 -07:00 • committed by GitHub
parent c1b9f74f98
commit 7c6ba3fcbd
3 changed files with 29 additions and 10 deletions
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23
plugin/proxy/metrics.go
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@ -10,21 +10,40 @@ import (
// Metrics the proxy plugin exports.
var (
RequestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "proxy",
Name: "request_count_total",
Help: "Counter of requests made per protocol, proxy protocol, family and upstream.",
}, []string{"proto", "proxy_proto", "family", "to"})
RequestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: plugin.Namespace,
Subsystem: "proxy",
Name: "request_duration_milliseconds",
Buckets: append(prometheus.DefBuckets, []float64{50, 100, 200, 500, 1000, 2000, 3000, 4000, 5000, 10000}...),
Buckets: append(prometheus.DefBuckets, []float64{15, 20, 25, 30, 40, 50, 100, 200, 500, 1000, 2000, 3000, 4000, 5000, 10000}...),
Help: "Histogram of the time (in milliseconds) each request took.",
}, []string{"proto", "proxy_proto", "from"})
}, []string{"proto", "proxy_proto", "family", "to"})
)
// OnStartupMetrics sets up the metrics on startup. This is done for all proxy protocols.
func OnStartupMetrics() error {
metricsOnce.Do(func() {
prometheus.MustRegister(RequestCount)
prometheus.MustRegister(RequestDuration)
})
return nil
}
// familyToString returns the string form of either 1, or 2. Returns
// empty string is not a known family
func familyToString(f int) string {
if f == 1 {
return "1"
}
if f == 2 {
return "2"
}
return ""
}
var metricsOnce sync.Once