cloudflared-mirror/quic/metrics.go

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package quic
import (
"sync"
"github.com/lucas-clemente/quic-go/logging"
"github.com/prometheus/client_golang/prometheus"
)
const (
namespace = "quic"
)
var (
clientConnLabels = []string{"conn_index"}
clientMetrics = struct {
totalConnections prometheus.Counter
closedConnections *prometheus.CounterVec
sentPackets *prometheus.CounterVec
sentBytes *prometheus.CounterVec
receivePackets *prometheus.CounterVec
receiveBytes *prometheus.CounterVec
bufferedPackets *prometheus.CounterVec
droppedPackets *prometheus.CounterVec
lostPackets *prometheus.CounterVec
minRTT *prometheus.GaugeVec
latestRTT *prometheus.GaugeVec
smoothedRTT *prometheus.GaugeVec
}{
totalConnections: prometheus.NewCounter(
totalConnectionsOpts(logging.PerspectiveClient),
),
closedConnections: prometheus.NewCounterVec(
closedConnectionsOpts(logging.PerspectiveClient),
[]string{"error"},
),
sentPackets: prometheus.NewCounterVec(
sentPacketsOpts(logging.PerspectiveClient),
clientConnLabels,
),
sentBytes: prometheus.NewCounterVec(
sentBytesOpts(logging.PerspectiveClient),
clientConnLabels,
),
receivePackets: prometheus.NewCounterVec(
receivePacketsOpts(logging.PerspectiveClient),
clientConnLabels,
),
receiveBytes: prometheus.NewCounterVec(
receiveBytesOpts(logging.PerspectiveClient),
clientConnLabels,
),
bufferedPackets: prometheus.NewCounterVec(
bufferedPacketsOpts(logging.PerspectiveClient),
append(clientConnLabels, "packet_type"),
),
droppedPackets: prometheus.NewCounterVec(
droppedPacketsOpts(logging.PerspectiveClient),
append(clientConnLabels, "packet_type", "reason"),
),
lostPackets: prometheus.NewCounterVec(
lostPacketsOpts(logging.PerspectiveClient),
append(clientConnLabels, "reason"),
),
minRTT: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Subsystem: perspectiveString(logging.PerspectiveClient),
Name: "min_rtt",
Help: "Lowest RTT measured on a connection in millisec",
},
clientConnLabels,
),
latestRTT: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Subsystem: perspectiveString(logging.PerspectiveClient),
Name: "latest_rtt",
Help: "Latest RTT measured on a connection",
},
clientConnLabels,
),
smoothedRTT: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Subsystem: perspectiveString(logging.PerspectiveClient),
Name: "smoothed_rtt",
Help: "Calculated smoothed RTT measured on a connection in millisec",
},
clientConnLabels,
),
}
// The server has many QUIC connections. Adding per connection label incurs high memory cost
serverMetrics = struct {
totalConnections prometheus.Counter
closedConnections prometheus.Counter
sentPackets prometheus.Counter
sentBytes prometheus.Counter
receivePackets prometheus.Counter
receiveBytes prometheus.Counter
bufferedPackets *prometheus.CounterVec
droppedPackets *prometheus.CounterVec
lostPackets *prometheus.CounterVec
rtt prometheus.Histogram
}{
totalConnections: prometheus.NewCounter(
totalConnectionsOpts(logging.PerspectiveServer),
),
closedConnections: prometheus.NewCounter(
closedConnectionsOpts(logging.PerspectiveServer),
),
sentPackets: prometheus.NewCounter(
sentPacketsOpts(logging.PerspectiveServer),
),
sentBytes: prometheus.NewCounter(
sentBytesOpts(logging.PerspectiveServer),
),
receivePackets: prometheus.NewCounter(
receivePacketsOpts(logging.PerspectiveServer),
),
receiveBytes: prometheus.NewCounter(
receiveBytesOpts(logging.PerspectiveServer),
),
bufferedPackets: prometheus.NewCounterVec(
bufferedPacketsOpts(logging.PerspectiveServer),
[]string{"packet_type"},
),
droppedPackets: prometheus.NewCounterVec(
droppedPacketsOpts(logging.PerspectiveServer),
[]string{"packet_type", "reason"},
),
lostPackets: prometheus.NewCounterVec(
lostPacketsOpts(logging.PerspectiveServer),
[]string{"reason"},
),
rtt: prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: namespace,
Subsystem: perspectiveString(logging.PerspectiveServer),
Name: "rtt",
Buckets: []float64{5, 10, 20, 30, 40, 50, 75, 100},
},
),
}
registerClient = sync.Once{}
registerServer = sync.Once{}
)
// MetricsCollector abstracts the difference between client and server metrics from connTracer
type MetricsCollector interface {
startedConnection()
closedConnection(err error)
sentPackets(logging.ByteCount)
receivedPackets(logging.ByteCount)
bufferedPackets(logging.PacketType)
droppedPackets(logging.PacketType, logging.ByteCount, logging.PacketDropReason)
lostPackets(logging.PacketLossReason)
updatedRTT(*logging.RTTStats)
}
func totalConnectionsOpts(p logging.Perspective) prometheus.CounterOpts {
var help string
if p == logging.PerspectiveClient {
help = "Number of connections initiated. For all quic metrics, client means the side initiating the connection"
} else {
help = "Number of connections accepted. For all quic metrics, server means the side accepting connections"
}
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "total_connections",
Help: help,
}
}
func closedConnectionsOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "closed_connections",
Help: "Number of connections that has been closed",
}
}
func sentPacketsOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "sent_packets",
Help: "Number of packets that have been sent through a connection",
}
}
func sentBytesOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "sent_bytes",
Help: "Number of bytes that have been sent through a connection",
}
}
func receivePacketsOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "receive_packets",
Help: "Number of packets that have been received through a connection",
}
}
func receiveBytesOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "receive_bytes",
Help: "Number of bytes that have been received through a connection",
}
}
func bufferedPacketsOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "buffered_packets",
Help: "Number of bytes that have been buffered on a connection",
}
}
func droppedPacketsOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "dropped_packets",
Help: "Number of bytes that have been dropped on a connection",
}
}
func lostPacketsOpts(p logging.Perspective) prometheus.CounterOpts {
return prometheus.CounterOpts{
Namespace: namespace,
Subsystem: perspectiveString(p),
Name: "lost_packets",
Help: "Number of packets that have been lost from a connection",
}
}
type clientCollector struct {
index string
}
func newClientCollector(index uint8) MetricsCollector {
registerClient.Do(func() {
prometheus.MustRegister(
clientMetrics.totalConnections,
clientMetrics.closedConnections,
clientMetrics.sentPackets,
clientMetrics.sentBytes,
clientMetrics.receivePackets,
clientMetrics.receiveBytes,
clientMetrics.bufferedPackets,
clientMetrics.droppedPackets,
clientMetrics.lostPackets,
clientMetrics.minRTT,
clientMetrics.latestRTT,
clientMetrics.smoothedRTT,
)
})
return &clientCollector{
index: uint8ToString(index),
}
}
func (cc *clientCollector) startedConnection() {
clientMetrics.totalConnections.Inc()
}
func (cc *clientCollector) closedConnection(err error) {
clientMetrics.closedConnections.WithLabelValues(err.Error()).Inc()
}
func (cc *clientCollector) sentPackets(size logging.ByteCount) {
clientMetrics.sentPackets.WithLabelValues(cc.index).Inc()
clientMetrics.sentBytes.WithLabelValues(cc.index).Add(byteCountToPromCount(size))
}
func (cc *clientCollector) receivedPackets(size logging.ByteCount) {
clientMetrics.receivePackets.WithLabelValues(cc.index).Inc()
clientMetrics.receiveBytes.WithLabelValues(cc.index).Add(byteCountToPromCount(size))
}
func (cc *clientCollector) bufferedPackets(packetType logging.PacketType) {
clientMetrics.bufferedPackets.WithLabelValues(cc.index, packetTypeString(packetType)).Inc()
}
func (cc *clientCollector) droppedPackets(packetType logging.PacketType, size logging.ByteCount, reason logging.PacketDropReason) {
clientMetrics.droppedPackets.WithLabelValues(
cc.index,
packetTypeString(packetType),
packetDropReasonString(reason),
).Add(byteCountToPromCount(size))
}
func (cc *clientCollector) lostPackets(reason logging.PacketLossReason) {
clientMetrics.lostPackets.WithLabelValues(cc.index, packetLossReasonString(reason)).Inc()
}
func (cc *clientCollector) updatedRTT(rtt *logging.RTTStats) {
clientMetrics.minRTT.WithLabelValues(cc.index).Set(durationToPromGauge(rtt.MinRTT()))
clientMetrics.latestRTT.WithLabelValues(cc.index).Set(durationToPromGauge(rtt.LatestRTT()))
clientMetrics.smoothedRTT.WithLabelValues(cc.index).Set(durationToPromGauge(rtt.SmoothedRTT()))
}
type serverCollector struct{}
func newServiceCollector() MetricsCollector {
registerServer.Do(func() {
prometheus.MustRegister(
serverMetrics.totalConnections,
serverMetrics.closedConnections,
serverMetrics.sentPackets,
serverMetrics.sentBytes,
serverMetrics.receivePackets,
serverMetrics.receiveBytes,
serverMetrics.bufferedPackets,
serverMetrics.droppedPackets,
serverMetrics.lostPackets,
serverMetrics.rtt,
)
})
return &serverCollector{}
}
func (sc *serverCollector) startedConnection() {
serverMetrics.totalConnections.Inc()
}
func (sc *serverCollector) closedConnection(err error) {
serverMetrics.closedConnections.Inc()
}
func (sc *serverCollector) sentPackets(size logging.ByteCount) {
serverMetrics.sentPackets.Inc()
serverMetrics.sentBytes.Add(byteCountToPromCount(size))
}
func (sc *serverCollector) receivedPackets(size logging.ByteCount) {
serverMetrics.receivePackets.Inc()
serverMetrics.receiveBytes.Add(byteCountToPromCount(size))
}
func (sc *serverCollector) bufferedPackets(packetType logging.PacketType) {
serverMetrics.bufferedPackets.WithLabelValues(packetTypeString(packetType)).Inc()
}
func (sc *serverCollector) droppedPackets(packetType logging.PacketType, size logging.ByteCount, reason logging.PacketDropReason) {
serverMetrics.droppedPackets.WithLabelValues(
packetTypeString(packetType),
packetDropReasonString(reason),
).Add(byteCountToPromCount(size))
}
func (sc *serverCollector) lostPackets(reason logging.PacketLossReason) {
serverMetrics.lostPackets.WithLabelValues(packetLossReasonString(reason)).Inc()
}
func (sc *serverCollector) updatedRTT(rtt *logging.RTTStats) {
latestRTT := rtt.LatestRTT()
2021-11-12 15:38:06 +00:00
// May return 0 if no valid updates have occurred
if latestRTT > 0 {
serverMetrics.rtt.Observe(durationToPromGauge(latestRTT))
}
}