forked from TrueCloudLab/frostfs-s3-gw
391 lines
9.8 KiB
Go
391 lines
9.8 KiB
Go
package api
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import (
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"io"
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"net/http"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
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"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
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"github.com/prometheus/client_golang/prometheus"
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)
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type RequestType int
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const (
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HEADRequest RequestType = iota
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PUTRequest RequestType = iota
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LISTRequest RequestType = iota
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GETRequest RequestType = iota
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DELETERequest RequestType = iota
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)
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func (t RequestType) String() string {
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switch t {
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case 0:
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return "HEAD"
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case 1:
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return "PUT"
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case 2:
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return "LIST"
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case 3:
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return "GET"
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case 4:
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return "DELETE"
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default:
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return "Unknown"
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}
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}
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func RequestTypeFromAPI(api string) RequestType {
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switch api {
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case "headobject", "headbucket":
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return HEADRequest
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case "createmultipartupload", "uploadpartcopy", "uploadpart", "completemutipartupload",
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"putobjectacl", "putobjecttagging", "copyobject", "putobjectretention", "putobjectlegalhold",
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"putobject", "putbucketcors", "putbucketacl", "putbucketlifecycle", "putbucketencryption",
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"putbucketpolicy", "putbucketobjectlockconfig", "putbuckettagging", "putbucketversioning",
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"putbucketnotification", "createbucket", "postobject":
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return PUTRequest
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case "listmultipartuploads", "listobjectsv2M", "listobjectsv2", "listbucketversions",
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"listobjectsv1", "listbuckets":
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return LISTRequest
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case "getobjectacl", "getobjecttagging", "getobjectretention", "getobjectlegalhold",
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"getobjectattributes", "getobject", "getbucketlocation", "getbucketpolicy",
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"getbucketlifecycle", "getbucketencryption", "getbucketcors", "getbucketacl",
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"getbucketwebsite", "getbucketaccelerate", "getbucketrequestpayment", "getbucketlogging",
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"getbucketreplication", "getbuckettagging", "selectobjectcontent",
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"getbucketobjectlockconfiguration", "getbucketversioning", "getbucketnotification",
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"listenbucketnotification":
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return GETRequest
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case "abortmultipartupload", "deleteobjecttagging", "deleteobject", "deletebucketcors",
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"deletebucketwebsite", "deletebuckettagging", "deletemultipleobjects", "deletebucketpolicy",
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"deletebucketlifecycle", "deletebucketencryption", "deletebucket":
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return DELETERequest
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default:
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return RequestType(-1)
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}
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}
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type OperationList [5]int
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type (
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// HTTPAPIStats holds statistics information about
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// the API given in the requests.
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HTTPAPIStats struct {
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apiStats map[string]int
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sync.RWMutex
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}
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UsersAPIStats struct {
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users map[string]*userAPIStats
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sync.RWMutex
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}
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bucketKey struct {
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name string
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cid string
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}
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userAPIStats struct {
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buckets map[bucketKey]OperationList
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user string
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}
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// HTTPStats holds statistics information about
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// HTTP requests made by all clients.
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HTTPStats struct {
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usersS3Requests UsersAPIStats
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currentS3Requests HTTPAPIStats
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totalS3Requests HTTPAPIStats
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totalS3Errors HTTPAPIStats
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totalInputBytes uint64
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totalOutputBytes uint64
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}
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readCounter struct {
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io.ReadCloser
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countBytes uint64
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}
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writeCounter struct {
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http.ResponseWriter
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countBytes uint64
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}
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responseWrapper struct {
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sync.Once
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http.ResponseWriter
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statusCode int
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startTime time.Time
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}
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)
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const systemPath = "/system"
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var (
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httpStatsMetric = new(HTTPStats)
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httpRequestsDuration = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "frostfs_s3_request_seconds",
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Help: "Time taken by requests served by current FrostFS S3 Gate instance",
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Buckets: []float64{.05, .1, .25, .5, 1, 2.5, 5, 10},
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},
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[]string{"api"},
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)
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)
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// Collects HTTP metrics for FrostFS S3 Gate in Prometheus specific format
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// and sends to the given channel.
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func collectHTTPMetrics(ch chan<- prometheus.Metric) {
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for api, value := range httpStatsMetric.currentS3Requests.Load() {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("frostfs_s3", "requests", "current"),
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"Total number of running s3 requests in current FrostFS S3 Gate instance",
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[]string{"api"}, nil),
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prometheus.CounterValue,
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float64(value),
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api,
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)
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}
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for api, value := range httpStatsMetric.totalS3Requests.Load() {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("frostfs_s3", "requests", "total"),
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"Total number of s3 requests in current FrostFS S3 Gate instance",
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[]string{"api"}, nil),
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prometheus.CounterValue,
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float64(value),
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api,
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)
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}
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for api, value := range httpStatsMetric.totalS3Errors.Load() {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("frostfs_s3", "errors", "total"),
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"Total number of s3 errors in current FrostFS S3 Gate instance",
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[]string{"api"}, nil),
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prometheus.CounterValue,
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float64(value),
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api,
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)
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}
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for _, value := range httpStatsMetric.usersS3Requests.DumpMetrics() {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("frostfs_s3", "user_requests", "count"),
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"",
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[]string{"user", "bucket", "cid", "operation"}, nil),
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prometheus.CounterValue,
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float64(value.Requests),
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value.User,
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value.Bucket,
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value.ContainerID,
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value.Operation,
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)
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}
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}
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// APIStats wraps http handler for api with basic statistics collection.
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func APIStats(api string, f http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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httpStatsMetric.currentS3Requests.Inc(api)
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defer httpStatsMetric.currentS3Requests.Dec(api)
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in := &readCounter{ReadCloser: r.Body}
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out := &writeCounter{ResponseWriter: w}
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r.Body = in
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statsWriter := &responseWrapper{
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ResponseWriter: out,
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startTime: time.Now(),
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}
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f.ServeHTTP(statsWriter, r)
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// Time duration in secs since the call started.
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// We don't need to do nanosecond precision here
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// simply for the fact that it is not human readable.
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durationSecs := time.Since(statsWriter.startTime).Seconds()
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httpStatsMetric.updateStats(api, statsWriter, r, durationSecs)
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atomic.AddUint64(&httpStatsMetric.totalInputBytes, in.countBytes)
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atomic.AddUint64(&httpStatsMetric.totalOutputBytes, out.countBytes)
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}
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}
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// Inc increments the api stats counter.
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func (stats *HTTPAPIStats) Inc(api string) {
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if stats == nil {
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return
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}
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stats.Lock()
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defer stats.Unlock()
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if stats.apiStats == nil {
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stats.apiStats = make(map[string]int)
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}
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stats.apiStats[api]++
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}
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// Dec increments the api stats counter.
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func (stats *HTTPAPIStats) Dec(api string) {
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if stats == nil {
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return
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}
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stats.Lock()
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defer stats.Unlock()
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if val, ok := stats.apiStats[api]; ok && val > 0 {
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stats.apiStats[api]--
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}
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}
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// Load returns the recorded stats.
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func (stats *HTTPAPIStats) Load() map[string]int {
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stats.Lock()
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defer stats.Unlock()
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var apiStats = make(map[string]int, len(stats.apiStats))
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for k, v := range stats.apiStats {
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apiStats[k] = v
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}
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return apiStats
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}
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func (u *UsersAPIStats) Update(user, bucket, cnrID string, reqType RequestType) {
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u.Lock()
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defer u.Unlock()
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usersStat := u.users[user]
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if usersStat == nil {
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if u.users == nil {
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u.users = make(map[string]*userAPIStats)
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}
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usersStat = &userAPIStats{
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buckets: make(map[bucketKey]OperationList, 1),
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user: user,
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}
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u.users[user] = usersStat
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}
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key := bucketKey{
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name: bucket,
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cid: cnrID,
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}
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bucketStat := usersStat.buckets[key]
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bucketStat[reqType] += 1
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usersStat.buckets[key] = bucketStat
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}
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type UserMetricsInfo struct {
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User string
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Bucket string
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ContainerID string
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Operation string
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Requests int
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}
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func (u *UsersAPIStats) DumpMetrics() []UserMetricsInfo {
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u.Lock()
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defer u.Unlock()
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result := make([]UserMetricsInfo, 0, len(u.users))
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for user, userStat := range u.users {
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for key, operations := range userStat.buckets {
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for op, val := range operations {
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if val != 0 {
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result = append(result, UserMetricsInfo{
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User: user,
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Bucket: key.name,
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ContainerID: key.cid,
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Operation: RequestType(op).String(),
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Requests: val,
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})
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}
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}
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}
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}
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u.users = make(map[string]*userAPIStats)
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return result
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}
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func (st *HTTPStats) getInputBytes() uint64 {
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return atomic.LoadUint64(&st.totalInputBytes)
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}
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func (st *HTTPStats) getOutputBytes() uint64 {
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return atomic.LoadUint64(&st.totalOutputBytes)
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}
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// Update statistics from http request and response data.
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func (st *HTTPStats) updateStats(apiOperation string, w http.ResponseWriter, r *http.Request, durationSecs float64) {
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var code int
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if res, ok := w.(*responseWrapper); ok {
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code = res.statusCode
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}
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user := "anon"
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if bd, ok := r.Context().Value(BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
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user = bearer.ResolveIssuer(*bd.Gate.BearerToken).String()
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}
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reqInfo := GetReqInfo(r.Context())
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cnrID := GetCID(r.Context())
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st.usersS3Requests.Update(user, reqInfo.BucketName, cnrID, RequestTypeFromAPI(apiOperation))
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// A successful request has a 2xx response code
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successReq := code >= http.StatusOK && code < http.StatusMultipleChoices
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if !strings.HasSuffix(r.URL.Path, systemPath) {
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st.totalS3Requests.Inc(apiOperation)
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if !successReq && code != 0 {
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st.totalS3Errors.Inc(apiOperation)
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}
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}
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if r.Method == http.MethodGet {
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// Increment the prometheus http request response histogram with appropriate label
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httpRequestsDuration.With(prometheus.Labels{"api": apiOperation}).Observe(durationSecs)
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}
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}
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// WriteHeader -- writes http status code.
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func (w *responseWrapper) WriteHeader(code int) {
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w.Do(func() {
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w.statusCode = code
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w.ResponseWriter.WriteHeader(code)
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})
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}
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// Flush -- calls the underlying Flush.
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func (w *responseWrapper) Flush() {
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if f, ok := w.ResponseWriter.(http.Flusher); ok {
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f.Flush()
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}
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}
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func (w *writeCounter) Write(p []byte) (int, error) {
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n, err := w.ResponseWriter.Write(p)
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atomic.AddUint64(&w.countBytes, uint64(n))
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return n, err
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}
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func (r *readCounter) Read(p []byte) (int, error) {
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n, err := r.ReadCloser.Read(p)
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atomic.AddUint64(&r.countBytes, uint64(n))
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return n, err
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}
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