forked from TrueCloudLab/distribution
123 lines
3.9 KiB
Go
123 lines
3.9 KiB
Go
package proxy
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import (
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"expvar"
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"sync/atomic"
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prometheus "github.com/distribution/distribution/v3/metrics"
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"github.com/docker/go-metrics"
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)
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var (
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// requests is the number of total incoming proxy request received for blob/manifest
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requests = prometheus.ProxyNamespace.NewLabeledCounter("requests", "The number of total incoming proxy request received", "type")
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// hits is the number of total proxy request hits for blob/manifest
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hits = prometheus.ProxyNamespace.NewLabeledCounter("hits", "The number of total proxy request hits", "type")
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// hits is the number of total proxy request misses for blob/manifest
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misses = prometheus.ProxyNamespace.NewLabeledCounter("misses", "The number of total proxy request misses", "type")
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// pulledBytes is the size of total bytes pulled from the upstream for blob/manifest
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pulledBytes = prometheus.ProxyNamespace.NewLabeledCounter("pulled_bytes", "The size of total bytes pulled from the upstream", "type")
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// pushedBytes is the size of total bytes pushed to the client for blob/manifest
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pushedBytes = prometheus.ProxyNamespace.NewLabeledCounter("pushed_bytes", "The size of total bytes pushed to the client", "type")
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)
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// Metrics is used to hold metric counters
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// related to the proxy
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type Metrics struct {
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Requests uint64
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Hits uint64
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Misses uint64
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BytesPulled uint64
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BytesPushed uint64
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}
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type proxyMetricsCollector struct {
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blobMetrics Metrics
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manifestMetrics Metrics
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}
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// proxyMetrics tracks metrics about the proxy cache. This is
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// kept globally and made available via expvar.
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var proxyMetrics = &proxyMetricsCollector{}
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func init() {
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registry := expvar.Get("registry")
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if registry == nil {
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registry = expvar.NewMap("registry")
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}
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pm := registry.(*expvar.Map).Get("proxy")
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if pm == nil {
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pm = &expvar.Map{}
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pm.(*expvar.Map).Init()
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registry.(*expvar.Map).Set("proxy", pm)
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}
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pm.(*expvar.Map).Set("blobs", expvar.Func(func() interface{} {
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return proxyMetrics.blobMetrics
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}))
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pm.(*expvar.Map).Set("manifests", expvar.Func(func() interface{} {
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return proxyMetrics.manifestMetrics
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}))
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metrics.Register(prometheus.ProxyNamespace)
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initPrometheusMetrics("blob")
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initPrometheusMetrics("manifest")
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}
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func initPrometheusMetrics(value string) {
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requests.WithValues(value).Inc(0)
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hits.WithValues(value).Inc(0)
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misses.WithValues(value).Inc(0)
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pulledBytes.WithValues(value).Inc(0)
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pushedBytes.WithValues(value).Inc(0)
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}
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// BlobPull tracks metrics about blobs pulled into the cache
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func (pmc *proxyMetricsCollector) BlobPull(bytesPulled uint64) {
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atomic.AddUint64(&pmc.blobMetrics.Misses, 1)
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atomic.AddUint64(&pmc.blobMetrics.BytesPulled, bytesPulled)
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misses.WithValues("blob").Inc(1)
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pulledBytes.WithValues("blob").Inc(float64(bytesPulled))
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}
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// BlobPush tracks metrics about blobs pushed to clients
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func (pmc *proxyMetricsCollector) BlobPush(bytesPushed uint64, isHit bool) {
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atomic.AddUint64(&pmc.blobMetrics.Requests, 1)
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atomic.AddUint64(&pmc.blobMetrics.BytesPushed, bytesPushed)
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requests.WithValues("blob").Inc(1)
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pushedBytes.WithValues("blob").Inc(float64(bytesPushed))
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if isHit {
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atomic.AddUint64(&pmc.blobMetrics.Hits, 1)
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hits.WithValues("blob").Inc(1)
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}
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}
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// ManifestPull tracks metrics related to Manifests pulled into the cache
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func (pmc *proxyMetricsCollector) ManifestPull(bytesPulled uint64) {
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atomic.AddUint64(&pmc.manifestMetrics.Misses, 1)
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atomic.AddUint64(&pmc.manifestMetrics.BytesPulled, bytesPulled)
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misses.WithValues("manifest").Inc(1)
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pulledBytes.WithValues("manifest").Inc(float64(bytesPulled))
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}
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// ManifestPush tracks metrics about manifests pushed to clients
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func (pmc *proxyMetricsCollector) ManifestPush(bytesPushed uint64, isHit bool) {
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atomic.AddUint64(&pmc.manifestMetrics.Requests, 1)
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atomic.AddUint64(&pmc.manifestMetrics.BytesPushed, bytesPushed)
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requests.WithValues("manifest").Inc(1)
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pushedBytes.WithValues("manifest").Inc(float64(bytesPushed))
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if isHit {
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atomic.AddUint64(&pmc.manifestMetrics.Hits, 1)
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hits.WithValues("manifest").Inc(1)
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}
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}
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