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metrics.go
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metrics.go
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package artemis
import (
"time"
"github.com/prometheus/client_golang/prometheus"
)
type TracingMetrics struct {
GetConnectionDurationSeconds *prometheus.HistogramVec
ReuseConnections *prometheus.CounterVec
ReuseIdleConnections *prometheus.CounterVec
FirstByteReceiveDurationSeconds *prometheus.HistogramVec
DNSLookupDurationSeconds *prometheus.HistogramVec
DNSCoalesced *prometheus.CounterVec
ConnectionHandshakeDurationSeconds *prometheus.HistogramVec
HeaderWriteDrurationSeconds *prometheus.HistogramVec
RequestWriteDurationSeconds *prometheus.HistogramVec
TLSHandshakeDurationSeconds *prometheus.HistogramVec
}
var (
SmallDurationBuckets = []float64{.0001, .0005, .001, .002, .005, .01, .05, .1, 1, 2.5, 5, 10}
HttpLabels prometheus.Labels
HostLabel = "host"
MethodLabel = "method"
UrlLabel = "url"
)
func NewTracingMetrics(namespace string) *TracingMetrics {
return &TracingMetrics{
GetConnectionDurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_get_connection_duration_seconds",
Help: "HTTP Get Connection Duration",
Buckets: SmallDurationBuckets,
}, []string{MethodLabel, UrlLabel}),
ReuseConnections: prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "http_reuse_connections",
Help: "HTTP Connection Re-use Counter",
}, []string{}),
ReuseIdleConnections: prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "http_reuse_idle_connections",
Help: "HTTP Idle Connection Re-use Counter",
}, []string{}),
FirstByteReceiveDurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_first_byte_response_duration_seconds",
Help: "HTTP Duration of Getting First Response Bytes",
Buckets: SmallDurationBuckets,
}, []string{MethodLabel, UrlLabel}),
DNSLookupDurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_dns_lookup_duration_seconds",
Help: "HTTP DNS Lookup Duration",
Buckets: SmallDurationBuckets,
}, []string{HostLabel}),
DNSCoalesced: prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "http_dns_coalesced_queries_counter",
Help: "HTTP DNS Query Coalesced Counter",
}, []string{HostLabel}),
ConnectionHandshakeDurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_connection_handshake_duration_seconds",
Help: "HTTP Connection Handshake Duration",
Buckets: SmallDurationBuckets,
}, []string{MethodLabel, UrlLabel}),
TLSHandshakeDurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_tls_handshake_duration_seconds",
Help: "HTTP TLS Handshake Duration",
Buckets: SmallDurationBuckets,
}, []string{MethodLabel, UrlLabel}),
HeaderWriteDrurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_header_write_duration_seconds",
Help: "HTTP Header Write Duration",
Buckets: SmallDurationBuckets,
}, []string{MethodLabel, UrlLabel}),
RequestWriteDurationSeconds: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: namespace,
Name: "http_request_write_duration_seconds",
Help: "HTTP Request Write Duration",
Buckets: SmallDurationBuckets,
}, []string{MethodLabel, UrlLabel}),
}
}
func (tm *TracingMetrics) GetConnectionDurationSecondsMetric(getConnTime time.Time, method, url string) {
getConnDuration := time.Since(getConnTime)
tm.GetConnectionDurationSeconds.With(prometheus.Labels{MethodLabel: method, UrlLabel: url}).Observe(getConnDuration.Seconds())
}
func (tm *TracingMetrics) ReuseConnectionsMetric() {
tm.ReuseConnections.With(HttpLabels).Inc()
}
func (tm *TracingMetrics) ReuseIdleConnectionsMetric() {
tm.ReuseIdleConnections.With(HttpLabels).Inc()
}
func (tm *TracingMetrics) FirstByteReceiveDurationSecondsMetric(startTime time.Time, method, url string) {
getFirstByteDuration := time.Since(startTime)
tm.FirstByteReceiveDurationSeconds.With(prometheus.Labels{MethodLabel: method, UrlLabel: url}).Observe(getFirstByteDuration.Seconds())
}
func (tm *TracingMetrics) DNSLookupDurationSecondsMetric(dnsStartTime time.Time, dnsHost string) {
dnsDuration := time.Since(dnsStartTime)
tm.DNSLookupDurationSeconds.With(prometheus.Labels{HostLabel: dnsHost}).Observe(dnsDuration.Seconds())
}
func (tm *TracingMetrics) DNSCoalescedMetric(dnsHost string) {
tm.DNSCoalesced.With(prometheus.Labels{HostLabel: dnsHost}).Inc()
}
func (tm *TracingMetrics) ConnectionHandshakeDurationSecondsMetric(connStartTime time.Time, method, url string) {
handshakeDuration := time.Since(connStartTime)
tm.ConnectionHandshakeDurationSeconds.With(prometheus.Labels{MethodLabel: method, UrlLabel: url}).Observe(handshakeDuration.Seconds())
}
func (tm *TracingMetrics) TLSHandshakeDurationSecondsMetric(connStartTime time.Time, method, url string) {
handshakeDuration := time.Since(connStartTime)
tm.TLSHandshakeDurationSeconds.With(prometheus.Labels{MethodLabel: method, UrlLabel: url}).Observe(handshakeDuration.Seconds())
}
func (tm *TracingMetrics) HeaderWriteDrurationSecondsMetric(startTime time.Time, method, url string) {
headerWriteDuration := time.Since(startTime)
tm.HeaderWriteDrurationSeconds.With(prometheus.Labels{MethodLabel: method, UrlLabel: url}).Observe(headerWriteDuration.Seconds())
}
func (tm *TracingMetrics) RequestWriteDurationSecondsMetric(startTime time.Time, method, url string) {
requestWriteDuration := time.Since(startTime)
tm.RequestWriteDurationSeconds.With(prometheus.Labels{MethodLabel: method, UrlLabel: url}).Observe(requestWriteDuration.Seconds())
}
func (tm *TracingMetrics) GetCollectors() []prometheus.Collector {
return []prometheus.Collector{
tm.GetConnectionDurationSeconds,
tm.ReuseIdleConnections,
tm.FirstByteReceiveDurationSeconds,
tm.DNSLookupDurationSeconds,
tm.DNSCoalesced,
tm.ConnectionHandshakeDurationSeconds,
tm.TLSHandshakeDurationSeconds,
tm.HeaderWriteDrurationSeconds,
tm.RequestWriteDurationSeconds,
}
}