minio/cmd/http-stats.go
Harshavardhana 6ac48a65cb
fix: use unused cacheMetrics code in prometheus (#9588)
remove all other unusued/deadcode
2020-05-13 08:15:26 -07:00

185 lines
4.7 KiB
Go

/*
* MinIO Cloud Storage, (C) 2017 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"net/http"
"strings"
"sync"
"sync/atomic"
"github.com/minio/minio/cmd/logger"
"github.com/prometheus/client_golang/prometheus"
)
// ConnStats - Network statistics
// Count total input/output transferred bytes during
// the server's life.
type ConnStats struct {
totalInputBytes uint64
totalOutputBytes uint64
s3InputBytes uint64
s3OutputBytes uint64
}
// Increase total input bytes
func (s *ConnStats) incInputBytes(n int) {
atomic.AddUint64(&s.totalInputBytes, uint64(n))
}
// Increase total output bytes
func (s *ConnStats) incOutputBytes(n int) {
atomic.AddUint64(&s.totalOutputBytes, uint64(n))
}
// Return total input bytes
func (s *ConnStats) getTotalInputBytes() uint64 {
return atomic.LoadUint64(&s.totalInputBytes)
}
// Return total output bytes
func (s *ConnStats) getTotalOutputBytes() uint64 {
return atomic.LoadUint64(&s.totalOutputBytes)
}
// Increase outbound input bytes
func (s *ConnStats) incS3InputBytes(n int) {
atomic.AddUint64(&s.s3InputBytes, uint64(n))
}
// Increase outbound output bytes
func (s *ConnStats) incS3OutputBytes(n int) {
atomic.AddUint64(&s.s3OutputBytes, uint64(n))
}
// Return outbound input bytes
func (s *ConnStats) getS3InputBytes() uint64 {
return atomic.LoadUint64(&s.s3InputBytes)
}
// Return outbound output bytes
func (s *ConnStats) getS3OutputBytes() uint64 {
return atomic.LoadUint64(&s.s3OutputBytes)
}
// Return connection stats (total input/output bytes and total s3 input/output bytes)
func (s *ConnStats) toServerConnStats() ServerConnStats {
return ServerConnStats{
TotalInputBytes: s.getTotalInputBytes(),
TotalOutputBytes: s.getTotalOutputBytes(),
S3InputBytes: s.getS3InputBytes(),
S3OutputBytes: s.getS3OutputBytes(),
}
}
// Prepare new ConnStats structure
func newConnStats() *ConnStats {
return &ConnStats{}
}
// HTTPAPIStats holds statistics information about
// a given API in the requests.
type HTTPAPIStats struct {
apiStats map[string]int
sync.RWMutex
}
// Inc increments the api stats counter.
func (stats *HTTPAPIStats) Inc(api string) {
if stats == nil {
return
}
stats.Lock()
defer stats.Unlock()
if stats.apiStats == nil {
stats.apiStats = make(map[string]int)
}
stats.apiStats[api]++
}
// Dec increments the api stats counter.
func (stats *HTTPAPIStats) Dec(api string) {
if stats == nil {
return
}
stats.Lock()
defer stats.Unlock()
if val, ok := stats.apiStats[api]; ok && val > 0 {
stats.apiStats[api]--
}
}
// Load returns the recorded stats.
func (stats *HTTPAPIStats) Load() map[string]int {
stats.Lock()
defer stats.Unlock()
var apiStats = make(map[string]int, len(stats.apiStats))
for k, v := range stats.apiStats {
apiStats[k] = v
}
return apiStats
}
// HTTPStats holds statistics information about
// HTTP requests made by all clients
type HTTPStats struct {
currentS3Requests HTTPAPIStats
totalS3Requests HTTPAPIStats
totalS3Errors HTTPAPIStats
}
// Converts http stats into struct to be sent back to the client.
func (st *HTTPStats) toServerHTTPStats() ServerHTTPStats {
serverStats := ServerHTTPStats{}
serverStats.CurrentS3Requests = ServerHTTPAPIStats{
APIStats: st.currentS3Requests.Load(),
}
serverStats.TotalS3Requests = ServerHTTPAPIStats{
APIStats: st.totalS3Requests.Load(),
}
serverStats.TotalS3Errors = ServerHTTPAPIStats{
APIStats: st.totalS3Errors.Load(),
}
return serverStats
}
// Update statistics from http request and response data
func (st *HTTPStats) updateStats(api string, r *http.Request, w *logger.ResponseWriter, durationSecs float64) {
// A successful request has a 2xx response code
successReq := (w.StatusCode >= 200 && w.StatusCode < 300)
if !strings.HasSuffix(r.URL.Path, prometheusMetricsPath) {
st.totalS3Requests.Inc(api)
if !successReq && w.StatusCode != 0 {
st.totalS3Errors.Inc(api)
}
}
if r.Method == http.MethodGet {
// Increment the prometheus http request response histogram with appropriate label
httpRequestsDuration.With(prometheus.Labels{"api": api}).Observe(durationSecs)
}
}
// Prepare new HTTPStats structure
func newHTTPStats() *HTTPStats {
return &HTTPStats{}
}