121 lines
3.3 KiB
Go
121 lines
3.3 KiB
Go
package collector
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import (
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"strconv"
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"github.com/prometheus/client_golang/prometheus"
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)
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type channelStats []struct {
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val func(*channel) float64
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vec *prometheus.GaugeVec
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}
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// ChannelStats creates a new stats collector which is able to
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// expose the channel metrics of a nsqd node to Prometheus. The
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// channel metrics are reported per topic.
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func ChannelStats(namespace string) StatsCollector {
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labels := []string{"type", "topic", "channel", "paused"}
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return channelStats{
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{
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val: func(c *channel) float64 { return float64(len(c.Clients)) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "client_count",
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Help: "Number of clients",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.Depth) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "depth",
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Help: "Queue depth",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.BackendDepth) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "backend_depth",
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Help: "Queue backend depth",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.MessageCount) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "message_count",
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Help: "Queue message count",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.InFlightCount) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "in_flight_count",
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Help: "In flight count",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return c.E2eLatency.Percentiles[0]["value"] },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "e2e_latency_99p",
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Help: "e2e latency 99th percentile",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return c.E2eLatency.Percentiles[1]["value"] },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "e2e_latency_95p",
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Help: "e2e latency 95th percentile",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.DeferredCount) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "deferred_count",
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Help: "Deferred count",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.RequeueCount) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "requeue_count",
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Help: "Requeue Count",
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}, labels),
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},
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{
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val: func(c *channel) float64 { return float64(c.TimeoutCount) },
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vec: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: "timeout_count",
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Help: "Timeout count",
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}, labels),
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},
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}
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}
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func (cs channelStats) collect(s *stats, out chan<- prometheus.Metric) {
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for _, topic := range s.Topics {
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for _, channel := range topic.Channels {
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labels := prometheus.Labels{
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"type": "channel",
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"topic": topic.Name,
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"channel": channel.Name,
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"paused": strconv.FormatBool(channel.Paused),
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}
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for _, c := range cs {
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c.vec.With(labels).Set(c.val(channel))
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c.vec.Collect(out)
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}
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}
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}
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}
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