forked from TrueCloudLab/frostfs-s3-gw
299 lines
8.1 KiB
Go
299 lines
8.1 KiB
Go
package api
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import (
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"context"
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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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UNKNOWNRequest RequestType = iota
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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 1:
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return "HEAD"
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case 2:
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return "PUT"
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case 3:
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return "LIST"
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case 4:
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return "GET"
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case 5:
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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 "Options", "HeadObject", "HeadBucket":
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return HEADRequest
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case "CreateMultipartUpload", "UploadPartCopy", "UploadPart", "CompleteMultipartUpload",
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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 "ListObjectParts", "ListMultipartUploads", "ListObjectsV2M", "ListObjectsV2", "ListBucketVersions",
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"ListObjectsV1", "ListBuckets":
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return LISTRequest
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case "GetObjectACL", "GetObjectTagging", "SelectObjectContent", "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", "GetBucketObjectLockConfig",
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"GetBucketVersioning", "GetBucketNotification", "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 UNKNOWNRequest
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}
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}
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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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UsersStat interface {
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Update(user, bucket, cnrID string, reqType RequestType, in, out uint64)
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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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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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}
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// CIDResolveFunc is a func to resolve CID in Stats handler.
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type CIDResolveFunc func(ctx context.Context, reqInfo *ReqInfo) (cnrID string)
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// Stats is a handler that update metrics.
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func Stats(f http.HandlerFunc, resolveCID CIDResolveFunc, usersStat UsersStat) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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reqInfo := GetReqInfo(r.Context())
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httpStatsMetric.currentS3Requests.Inc(reqInfo.API)
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defer httpStatsMetric.currentS3Requests.Dec(reqInfo.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(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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user := resolveUser(r.Context())
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cnrID := resolveCID(r.Context(), reqInfo)
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usersStat.Update(user, reqInfo.BucketName, cnrID, RequestTypeFromAPI(reqInfo.API), in.countBytes, out.countBytes)
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code := statsWriter.statusCode
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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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httpStatsMetric.totalS3Requests.Inc(reqInfo.API)
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if !successReq && code != 0 {
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httpStatsMetric.totalS3Errors.Inc(reqInfo.API)
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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": reqInfo.API}).Observe(durationSecs)
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}
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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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func resolveUser(ctx context.Context) string {
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user := "anon"
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if bd, ok := ctx.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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return user
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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 (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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// 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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