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Add metrics to relay #393

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merged 1 commit into from
Sep 10, 2021
Merged

Add metrics to relay #393

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63 changes: 21 additions & 42 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ import (

"github.com/go-kit/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/promlog"
"github.com/prometheus/common/promlog/flag"
Expand All @@ -50,118 +51,118 @@ const (
)

var (
eventStats = prometheus.NewCounterVec(
eventStats = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_events_total",
Help: "The total number of StatsD events seen.",
},
[]string{"type"},
)
eventsFlushed = prometheus.NewCounter(
eventsFlushed = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_event_queue_flushed_total",
Help: "Number of times events were flushed to exporter",
},
)
eventsUnmapped = prometheus.NewCounter(
eventsUnmapped = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_events_unmapped_total",
Help: "The total number of StatsD events no mapping was found for.",
})
udpPackets = prometheus.NewCounter(
udpPackets = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_udp_packets_total",
Help: "The total number of StatsD packets received over UDP.",
},
)
tcpConnections = prometheus.NewCounter(
tcpConnections = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_tcp_connections_total",
Help: "The total number of TCP connections handled.",
},
)
tcpErrors = prometheus.NewCounter(
tcpErrors = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_tcp_connection_errors_total",
Help: "The number of errors encountered reading from TCP.",
},
)
tcpLineTooLong = prometheus.NewCounter(
tcpLineTooLong = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_tcp_too_long_lines_total",
Help: "The number of lines discarded due to being too long.",
},
)
unixgramPackets = prometheus.NewCounter(
unixgramPackets = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_unixgram_packets_total",
Help: "The total number of StatsD packets received over Unixgram.",
},
)
linesReceived = prometheus.NewCounter(
linesReceived = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_lines_total",
Help: "The total number of StatsD lines received.",
},
)
samplesReceived = prometheus.NewCounter(
samplesReceived = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_samples_total",
Help: "The total number of StatsD samples received.",
},
)
sampleErrors = prometheus.NewCounterVec(
sampleErrors = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_sample_errors_total",
Help: "The total number of errors parsing StatsD samples.",
},
[]string{"reason"},
)
tagsReceived = prometheus.NewCounter(
tagsReceived = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_tags_total",
Help: "The total number of DogStatsD tags processed.",
},
)
tagErrors = prometheus.NewCounter(
tagErrors = promauto.NewCounter(
prometheus.CounterOpts{
Name: "statsd_exporter_tag_errors_total",
Help: "The number of errors parsing DogStatsD tags.",
},
)
configLoads = prometheus.NewCounterVec(
configLoads = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_config_reloads_total",
Help: "The number of configuration reloads.",
},
[]string{"outcome"},
)
mappingsCount = prometheus.NewGauge(prometheus.GaugeOpts{
mappingsCount = promauto.NewGauge(prometheus.GaugeOpts{
Name: "statsd_exporter_loaded_mappings",
Help: "The current number of configured metric mappings.",
})
conflictingEventStats = prometheus.NewCounterVec(
conflictingEventStats = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_events_conflict_total",
Help: "The total number of StatsD events with conflicting names.",
},
[]string{"type"},
)
errorEventStats = prometheus.NewCounterVec(
errorEventStats = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_events_error_total",
Help: "The total number of StatsD events discarded due to errors.",
},
[]string{"reason"},
)
eventsActions = prometheus.NewCounterVec(
eventsActions = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_events_actions_total",
Help: "The total number of StatsD events by action.",
},
[]string{"action"},
)
metricsCount = prometheus.NewGaugeVec(
metricsCount = promauto.NewGaugeVec(
prometheus.GaugeOpts{
Name: "statsd_exporter_metrics_total",
Help: "The total number of metrics.",
Expand All @@ -170,29 +171,6 @@ var (
)
)

func init() {
prometheus.MustRegister(version.NewCollector("statsd_exporter"))
prometheus.MustRegister(eventStats)
prometheus.MustRegister(eventsFlushed)
prometheus.MustRegister(eventsUnmapped)
prometheus.MustRegister(udpPackets)
prometheus.MustRegister(tcpConnections)
prometheus.MustRegister(tcpErrors)
prometheus.MustRegister(tcpLineTooLong)
prometheus.MustRegister(unixgramPackets)
prometheus.MustRegister(linesReceived)
prometheus.MustRegister(samplesReceived)
prometheus.MustRegister(sampleErrors)
prometheus.MustRegister(tagsReceived)
prometheus.MustRegister(tagErrors)
prometheus.MustRegister(configLoads)
prometheus.MustRegister(mappingsCount)
prometheus.MustRegister(conflictingEventStats)
prometheus.MustRegister(errorEventStats)
prometheus.MustRegister(eventsActions)
prometheus.MustRegister(metricsCount)
}

// uncheckedCollector wraps a Collector but its Describe method yields no Desc.
// This allows incoming metrics to have inconsistent label sets
type uncheckedCollector struct {
Expand Down Expand Up @@ -310,6 +288,7 @@ func main() {
level.Error(logger).Log("msg", "failed to set log level", "error", err)
os.Exit(1)
}
prometheus.MustRegister(version.NewCollector("statsd_exporter"))

parser := line.NewParser()
if *dogstatsdTagsEnabled {
Expand Down
27 changes: 27 additions & 0 deletions pkg/relay/relay.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,8 @@ import (

"github.com/go-kit/log"

"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/statsd_exporter/pkg/level"
)

Expand All @@ -31,8 +33,28 @@ type Relay struct {
conn *net.UDPConn
logger log.Logger
packetLength uint

packetsTotal prometheus.Counter
longLinesTotal prometheus.Counter
}

var (
relayPacketsTotal = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_relay_packets_total",
Help: "The number of StatsD packets relayed.",
},
[]string{"target"},
)
relayLongLinesTotal = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_relay_long_lines_total",
Help: "The number lines that were too long to relay.",
},
[]string{"target"},
)
)

// NewRelay creates a statsd UDP relay. It can be used to send copies of statsd raw
// lines to a separate service.
func NewRelay(l log.Logger, target string, packetLength uint) (*Relay, error) {
Expand All @@ -53,6 +75,9 @@ func NewRelay(l log.Logger, target string, packetLength uint) (*Relay, error) {
conn: conn,
logger: l,
packetLength: packetLength,

packetsTotal: relayPacketsTotal.WithLabelValues(target),
longLinesTotal: relayLongLinesTotal.WithLabelValues(target),
}

// Startup the UDP sender.
Expand Down Expand Up @@ -106,6 +131,7 @@ func (r *Relay) sendPacket(buf []byte) error {
}
level.Debug(r.logger).Log("msg", "Sending packet", "length", len(buf), "data", buf)
_, err := r.conn.WriteToUDP(buf, r.addr)
r.packetsTotal.Inc()
return err
}

Expand All @@ -118,6 +144,7 @@ func (r *Relay) RelayLine(l string) {
}
if lineLength > r.packetLength-1 {
level.Warn(r.logger).Log("msg", "line too long, not relaying", "length", lineLength, "max", r.packetLength)
r.longLinesTotal.Inc()
return
}
level.Debug(r.logger).Log("msg", "Relaying line", "line", l)
Expand Down