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minio/cmd/metrics.go

130 lines
3.8 KiB

/*
* Minio Cloud Storage, (C) 2018 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 (
"context"
"net/http"
"github.com/prometheus/client_golang/prometheus"
)
var (
httpRequests = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "minio_http_requests_total",
Help: "Total number of requests served by current Minio server instance",
},
[]string{"request_type"},
)
httpRequestsDuration = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Name: "minio_http_requests_duration_seconds",
Help: "Time taken by requests served by current Minio server instance",
Buckets: []float64{.001, .003, .005, .1, .5, 1},
},
[]string{"request_type"},
)
networkSentBytes = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_network_sent_bytes",
Help: "Total number of bytes sent by current Minio server instance",
},
)
networkReceivedBytes = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_network_received_bytes",
Help: "Total number of bytes received by current Minio server instance",
},
)
onlineMinioDisks = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_online_disks_total",
Help: "Total number of online disks for current Minio server instance",
},
)
offlineMinioDisks = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_offline_disks_total",
Help: "Total number of offline disks for current Minio server instance",
},
)
serverUptime = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_server_uptime_seconds",
Help: "Time elapsed since current Minio server instance started",
},
)
minioStorageTotal = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_disk_storage_bytes",
Help: "Total disk storage available to current Minio server instance",
},
)
minioStorageFree = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "minio_disk_storage_free_bytes",
Help: "Total free disk storage available to current Minio server instance",
},
)
)
func init() {
prometheus.MustRegister(httpRequests)
prometheus.MustRegister(httpRequestsDuration)
prometheus.MustRegister(networkSentBytes)
prometheus.MustRegister(networkReceivedBytes)
prometheus.MustRegister(onlineMinioDisks)
prometheus.MustRegister(offlineMinioDisks)
prometheus.MustRegister(serverUptime)
prometheus.MustRegister(minioStorageTotal)
prometheus.MustRegister(minioStorageFree)
}
func updateGeneralMetrics() {
// Increment server uptime
serverUptime.Set(UTCNow().Sub(globalBootTime).Seconds())
// Fetch disk space info
objLayer := newObjectLayerFn()
// Service not initialized yet
if objLayer == nil {
return
}
// Update total/free disk space
s := objLayer.StorageInfo(context.Background())
minioStorageTotal.Set(float64(s.Total))
minioStorageFree.Set(float64(s.Free))
// Update online/offline disks
onlineMinioDisks.Set(float64(s.Backend.OnlineDisks))
offlineMinioDisks.Set(float64(s.Backend.OfflineDisks))
// Update prometheus metric
networkSentBytes.Set(float64(globalConnStats.getTotalOutputBytes()))
networkReceivedBytes.Set(float64(globalConnStats.getTotalInputBytes()))
}
func metricsHandler(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Update generic metrics before handling the prometheus scrape request
updateGeneralMetrics()
prometheus.Handler().ServeHTTP(w, r)
})
}