unistack-org/micro-meter-prometheus
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rewrite most stuff

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Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
Василий Толстов 2022-03-11 01:24:14 +03:00
parent d7a9e96561
commit 8ad0258828
2 changed files with 248 additions and 183 deletions
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428
prometheus.go
View File

@ -2,6 +2,7 @@ package prometheus
import (
"fmt"
"hash/fnv"
"io"
"sync"
"time"
@ -13,26 +14,73 @@ import (
"go.unistack.org/micro/v3/meter"
)
var _ meter.Meter = &prometheusMeter{}
type prometheusMeter struct {
opts meter.Options
set prometheus.Registerer
counter map[string]prometheusCounter
floatCounter map[string]prometheusFloatCounter
gauge map[string]prometheusGauge
histogram map[string]prometheusHistogram
summary map[string]prometheusSummary
counter map[string]*counters
floatCounter map[string]*floatCounters
gauge map[string]*gauges
histogram map[string]*histograms
summary map[string]*summaries
sync.Mutex
}
func NewMeter(opts ...meter.Option) meter.Meter {
type counters struct {
cs map[uint64]*prometheusCounter
}
type gauges struct {
cs map[uint64]*prometheusGauge
}
type histograms struct {
cs map[uint64]*prometheusHistogram
}
type summaries struct {
cs map[uint64]*prometheusSummary
}
type floatCounters struct {
cs map[uint64]*prometheusFloatCounter
}
func newFloat64(v float64) *float64 {
nv := v
return &nv
}
func newMt(v dto.MetricType) *dto.MetricType {
nv := v
return &nv
}
func newInt(v int) *int {
nv := v
return &nv
}
func newInt64(v int64) *int64 {
nv := v
return &nv
}
func newString(v string) *string {
nv := v
return &nv
}
func NewMeter(opts ...meter.Option) *prometheusMeter {
return &prometheusMeter{
set: prometheus.DefaultRegisterer,
set: prometheus.NewRegistry(), // prometheus.DefaultRegisterer,
opts: meter.NewOptions(opts...),
counter: make(map[string]prometheusCounter),
floatCounter: make(map[string]prometheusFloatCounter),
gauge: make(map[string]prometheusGauge),
histogram: make(map[string]prometheusHistogram),
summary: make(map[string]prometheusSummary),
counter: make(map[string]*counters),
floatCounter: make(map[string]*floatCounters),
gauge: make(map[string]*gauges),
histogram: make(map[string]*histograms),
summary: make(map[string]*summaries),
}
}
@ -69,17 +117,16 @@ func (m *prometheusMeter) buildName(name string) string {
}
func (m *prometheusMeter) buildLabels(labels ...string) []string {
nl := len(m.opts.Labels) + len(labels)
nl := len(labels)
if nl == 0 {
return nil
}
nlabels := make([]string, 0, nl)
nlabels = append(nlabels, m.opts.Labels...)
nlabels = append(nlabels, labels...)
for idx := 0; idx < nl; idx++ {
nlabels[idx] = m.opts.LabelPrefix + nlabels[idx]
nlabels = append(nlabels, m.opts.LabelPrefix+labels[idx])
nlabels = append(nlabels, labels[idx+1])
idx++
}
return nlabels
@ -89,191 +136,156 @@ func (m *prometheusMeter) Name() string {
return m.opts.Name
}
func (m *prometheusMeter) mapLabels(src ...string) map[string]string {
src = m.buildLabels(src...)
mp := make(map[string]string, len(src)/2)
for idx := 0; idx < len(src); idx++ {
mp[src[idx]] = src[idx+1]
idx++
}
return mp
}
func (m *prometheusMeter) metricEqual(src []string, dst []string) bool {
if len(src) != len(dst)/2 {
return false
}
dst = m.buildLabels(dst...)
mp := make(map[string]struct{}, len(src))
for idx := range src {
mp[src[idx]] = struct{}{}
}
for idx := 0; idx < len(dst); idx++ {
if _, ok := mp[dst[idx]]; !ok {
return false
}
idx++
}
return true
}
func (m *prometheusMeter) labelNames(src map[string]string, dst []string) []string {
dst = m.buildLabels(dst...)
nlabels := make([]string, 0, len(src))
for idx := 0; idx < len(dst); idx++ {
if src == nil {
nlabels = append(nlabels, dst[idx])
} else if _, ok := src[dst[idx]]; ok {
nlabels = append(nlabels, dst[idx])
} else {
nlabels = append(nlabels, dst[idx])
}
idx++
}
return nlabels
}
func (m *prometheusMeter) Counter(name string, labels ...string) meter.Counter {
m.Lock()
defer m.Unlock()
nm := m.buildName(name)
c, ok := m.counter[nm]
var lnames []string
labels = m.buildLabels(append(m.opts.Labels, labels...)...)
cd, ok := m.counter[nm]
h := newHash(labels)
if !ok {
lnames = m.labelNames(nil, labels)
fmt.Printf("!ok lnames: %v\n", lnames)
nc := prometheus.NewGaugeVec(prometheus.GaugeOpts{Name: nm}, lnames)
c = prometheusCounter{c: nc, lnames: lnames}
m.counter[nm] = c
} else if !m.metricEqual(c.lnames, labels) {
fmt.Printf("ok && !m.metricEqual lnames: %v labels: %v\n", c.lnames, labels)
lnames = m.labelNames(c.labels, labels)
m.set.Unregister(c.c)
nc := prometheus.NewGaugeVec(prometheus.GaugeOpts{Name: nm}, lnames)
c = prometheusCounter{c: nc, lnames: lnames}
m.counter[nm] = c
m.set.MustRegister(c.c)
} else {
lnames = c.lnames
cd = &counters{cs: make(map[uint64]*prometheusCounter)}
c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.counter[nm] = cd
return c
}
fmt.Printf("lnames %v\n", lnames)
return prometheusCounter{c: c.c, lnames: lnames, labels: m.mapLabels(labels...)}
c, ok := cd.cs[h]
if !ok {
c = &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.counter[nm] = cd
}
return c
}
func (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
m.Lock()
defer m.Unlock()
nm := m.buildName(name)
c, ok := m.floatCounter[nm]
labels = m.buildLabels(append(m.opts.Labels, labels...)...)
cd, ok := m.floatCounter[nm]
h := newHash(labels)
if !ok {
nc := prometheus.NewGaugeVec(prometheus.GaugeOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusFloatCounter{c: nc}
m.floatCounter[nm] = c
} else if !m.metricEqual(c.lnames, labels) {
m.set.Unregister(c.c)
nc := prometheus.NewGaugeVec(prometheus.GaugeOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusFloatCounter{c: nc}
m.floatCounter[nm] = c
m.set.MustRegister(c.c)
cd = &floatCounters{cs: make(map[uint64]*prometheusFloatCounter)}
c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.floatCounter[nm] = cd
return c
}
return prometheusFloatCounter{c: c.c, labels: m.mapLabels(labels...)}
c, ok := cd.cs[h]
if !ok {
c = &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.floatCounter[nm] = cd
}
return c
}
func (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
m.Lock()
defer m.Unlock()
nm := m.buildName(name)
c, ok := m.gauge[nm]
labels = m.buildLabels(append(m.opts.Labels, labels...)...)
cd, ok := m.gauge[nm]
h := newHash(labels)
if !ok {
nc := prometheus.NewGaugeVec(prometheus.GaugeOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusGauge{c: nc}
m.gauge[nm] = c
} else if !m.metricEqual(c.lnames, labels) {
m.set.Unregister(c.c)
nc := prometheus.NewGaugeVec(prometheus.GaugeOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusGauge{c: nc}
m.gauge[nm] = c
m.set.MustRegister(c.c)
cd = &gauges{cs: make(map[uint64]*prometheusGauge)}
c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.gauge[nm] = cd
return c
}
return prometheusGauge{c: c.c, labels: m.mapLabels(labels...)}
c, ok := cd.cs[h]
if !ok {
c = &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.gauge[nm] = cd
}
return c
}
func (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
m.Lock()
defer m.Unlock()
nm := m.buildName(name)
c, ok := m.histogram[nm]
labels = m.buildLabels(append(m.opts.Labels, labels...)...)
cd, ok := m.histogram[nm]
h := newHash(labels)
if !ok {
nc := prometheus.NewHistogramVec(prometheus.HistogramOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusHistogram{c: nc}
m.histogram[nm] = c
} else if !m.metricEqual(c.lnames, labels) {
m.set.Unregister(c.c)
nc := prometheus.NewHistogramVec(prometheus.HistogramOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusHistogram{c: nc}
m.histogram[nm] = c
m.set.MustRegister(c.c)
cd = &histograms{cs: make(map[uint64]*prometheusHistogram)}
c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.histogram[nm] = cd
return c
}
return prometheusHistogram{c: c.c, labels: m.mapLabels(labels...)}
c, ok := cd.cs[h]
if !ok {
c = &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.histogram[nm] = cd
}
return c
}
func (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
m.Lock()
defer m.Unlock()
nm := m.buildName(name)
c, ok := m.summary[nm]
labels = m.buildLabels(append(m.opts.Labels, labels...)...)
cd, ok := m.summary[nm]
h := newHash(labels)
if !ok {
nc := prometheus.NewSummaryVec(prometheus.SummaryOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusSummary{c: nc}
m.summary[nm] = c
} else if !m.metricEqual(c.lnames, labels) {
m.set.Unregister(c.c)
nc := prometheus.NewSummaryVec(prometheus.SummaryOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusSummary{c: nc}
m.summary[nm] = c
m.set.MustRegister(c.c)
cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.summary[nm] = cd
return c
}
return prometheusSummary{c: c.c, labels: m.mapLabels(labels...)}
c, ok := cd.cs[h]
if !ok {
c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
cd.cs[h] = c
m.summary[nm] = cd
}
return c
}
func (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
m.Lock()
defer m.Unlock()
nm := m.buildName(name)
c, ok := m.summary[nm]
labels = m.buildLabels(append(m.opts.Labels, labels...)...)
cd, ok := m.summary[nm]
h := newHash(labels)
if !ok {
nc := prometheus.NewSummaryVec(prometheus.SummaryOpts{
cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
Name: nm,
MaxAge: window,
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
}, m.labelNames(c.labels, labels))
c = prometheusSummary{c: nc}
m.summary[nm] = c
} else if !m.metricEqual(c.lnames, labels) {
m.set.Unregister(c.c)
nc := prometheus.NewSummaryVec(prometheus.SummaryOpts{Name: nm}, m.labelNames(c.labels, labels))
c = prometheusSummary{c: nc}
m.summary[nm] = c
m.set.MustRegister(c.c)
}), labels: labels}
cd.cs[h] = c
m.summary[nm] = cd
return c
}
return prometheusSummary{c: c.c, labels: m.mapLabels(labels...)}
c, ok := cd.cs[h]
if !ok {
c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
Name: nm,
MaxAge: window,
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
}), labels: labels}
cd.cs[h] = c
m.summary[nm] = cd
}
return c
}
func (m *prometheusMeter) Init(opts ...meter.Option) error {
for _, o := range opts {
o(&m.opts)
}
return nil
}
@ -299,6 +311,57 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
}
enc := expfmt.NewEncoder(w, expfmt.FmtText)
for name, metrics := range m.counter {
mf := &dto.MetricFamily{
Name: newString(name),
Type: dto.MetricType_GAUGE.Enum(),
Metric: make([]*dto.Metric, 0, len(metrics.cs)),
}
for _, c := range metrics.cs {
m := &dto.Metric{
Label: make([]*dto.LabelPair, 0, len(c.labels)/2),
Gauge: &dto.Gauge{
Value: newFloat64(float64(c.Get())),
},
}
for idx := 0; idx < len(c.labels); idx++ {
m.Label = append(m.Label, &dto.LabelPair{
Name: &c.labels[idx],
Value: &c.labels[idx+1],
})
idx++
}
mf.Metric = append(mf.Metric, m)
}
mfs = append(mfs, mf)
}
for name, metrics := range m.gauge {
mf := &dto.MetricFamily{
Name: newString(name),
Type: dto.MetricType_GAUGE.Enum(),
Metric: make([]*dto.Metric, 0, len(metrics.cs)),
}
for _, c := range metrics.cs {
m := &dto.Metric{
Label: make([]*dto.LabelPair, 0, len(c.labels)/2),
Gauge: &dto.Gauge{
Value: newFloat64(float64(c.Get())),
},
}
for idx := 0; idx < len(c.labels); idx++ {
m.Label = append(m.Label, &dto.LabelPair{
Name: &c.labels[idx],
Value: &c.labels[idx+1],
})
idx++
}
mf.Metric = append(mf.Metric, m)
}
mfs = append(mfs, mf)
}
for _, mf := range mfs {
_ = enc.Encode(mf)
}
@ -344,103 +407,106 @@ func (m *prometheusMeter) Set(opts ...meter.Option) meter.Meter {
}
type prometheusCounter struct {
c *prometheus.GaugeVec
lnames []string
labels prometheus.Labels
c prometheus.Gauge
labels []string
}
func (c prometheusCounter) Add(n int) {
nc, _ := c.c.GetMetricWith(c.labels)
nc.Add(float64(n))
func (c *prometheusCounter) Add(n int) {
c.c.Add(float64(n))
}
func (c prometheusCounter) Dec() {
c.c.With(c.labels).Dec()
func (c *prometheusCounter) Dec() {
c.c.Dec()
}
func (c prometheusCounter) Inc() {
c.c.With(c.labels).Inc()
func (c *prometheusCounter) Inc() {
c.c.Inc()
}
func (c prometheusCounter) Get() uint64 {
func (c *prometheusCounter) Get() uint64 {
m := &dto.Metric{}
if err := c.c.With(c.labels).Write(m); err != nil {
if err := c.c.Write(m); err != nil {
return 0
}
return uint64(m.GetGauge().GetValue())
}
func (c prometheusCounter) Set(n uint64) {
c.c.With(c.labels).Set(float64(n))
func (c *prometheusCounter) Set(n uint64) {
c.c.Set(float64(n))
}
type prometheusFloatCounter struct {
c *prometheus.GaugeVec
lnames []string
labels prometheus.Labels
c prometheus.Gauge
labels []string
}
func (c prometheusFloatCounter) Add(n float64) {
c.c.With(c.labels).Add(n)
c.c.Add(n)
}
func (c prometheusFloatCounter) Get() float64 {
m := &dto.Metric{}
if err := c.c.With(c.labels).Write(m); err != nil {
if err := c.c.Write(m); err != nil {
return 0
}
return m.GetGauge().GetValue()
}
func (c prometheusFloatCounter) Set(n float64) {
c.c.With(c.labels).Set(n)
c.c.Set(n)
}
func (c prometheusFloatCounter) Sub(n float64) {
c.c.With(c.labels).Add(-n)
c.c.Add(-n)
}
type prometheusGauge struct {
c *prometheus.GaugeVec
lnames []string
labels prometheus.Labels
c prometheus.Gauge
labels []string
}
func (c prometheusGauge) Get() float64 {
m := &dto.Metric{}
if err := c.c.With(c.labels).Write(m); err != nil {
if err := c.c.Write(m); err != nil {
return 0
}
return float64(m.GetGauge().GetValue())
}
type prometheusHistogram struct {
c *prometheus.HistogramVec
lnames []string
labels prometheus.Labels
c prometheus.Histogram
labels []string
}
func (c prometheusHistogram) Reset() {
}
func (c prometheusHistogram) Update(n float64) {
c.c.With(c.labels).Observe(n)
c.c.Observe(n)
}
func (c prometheusHistogram) UpdateDuration(n time.Time) {
c.c.With(c.labels).Observe(time.Since(n).Seconds())
c.c.Observe(time.Since(n).Seconds())
}
type prometheusSummary struct {
c *prometheus.SummaryVec
lnames []string
labels prometheus.Labels
c prometheus.Summary
labels []string
}
func (c prometheusSummary) Update(n float64) {
c.c.With(c.labels).Observe(n)
c.c.Observe(n)
}
func (c prometheusSummary) UpdateDuration(n time.Time) {
c.c.With(c.labels).Observe(time.Since(n).Seconds())
c.c.Observe(time.Since(n).Seconds())
}
func newHash(labels []string) uint64 {
labels = meter.BuildLabels(labels...)
h := fnv.New64a()
for _, l := range labels {
h.Write([]byte(l))
}
return h.Sum64()
}

3
prometheus_test.go
View File

@ -13,9 +13,8 @@ import (
func TestBuildName(t *testing.T) {
m := NewMeter()
im := m.(*prometheusMeter)
check := `micro_foo{micro_aaa="b",micro_bar="baz",micro_ccc="d"}`
name := im.buildMetric("foo", "bar", "baz", "aaa", "b", "ccc", "d")
name := m.buildMetric("foo", "bar", "baz", "aaa", "b", "ccc", "d")
if name != check {
t.Fatalf("metric name error: %s != %s", name, check)
}