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minio/cmd/metrics.go

339 lines
9.9 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/minio/minio/cmd/logger"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var (
httpRequestsDuration = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Name: "s3_ttfb_seconds",
Help: "Time taken by requests served by current MinIO server instance",
Buckets: []float64{.05, .1, .25, .5, 1, 2.5, 5, 10},
},
[]string{"api"},
)
minioVersionInfo = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: "minio",
Name: "version_info",
Help: "Version of current MinIO server instance",
},
[]string{
// current version
"version",
// commit-id of the current version
"commit",
},
)
)
func init() {
prometheus.MustRegister(httpRequestsDuration)
prometheus.MustRegister(newMinioCollector())
prometheus.MustRegister(minioVersionInfo)
}
// newMinioCollector describes the collector
// and returns reference of minioCollector
// It creates the Prometheus Description which is used
// to define metric and help string
func newMinioCollector() *minioCollector {
return &minioCollector{
desc: prometheus.NewDesc("minio_stats", "Statistics exposed by MinIO server", nil, nil),
}
}
// minioCollector is the Custom Collector
type minioCollector struct {
desc *prometheus.Desc
}
// Describe sends the super-set of all possible descriptors of metrics
func (c *minioCollector) Describe(ch chan<- *prometheus.Desc) {
ch <- c.desc
}
// Collect is called by the Prometheus registry when collecting metrics.
func (c *minioCollector) Collect(ch chan<- prometheus.Metric) {
// Expose MinIO's version information
minioVersionInfo.WithLabelValues(Version, CommitID).Set(float64(1.0))
// Fetch disk space info
objLayer := newObjectLayerFn()
// Service not initialized yet
if objLayer == nil {
return
}
storageInfo := objLayer.StorageInfo(context.Background(), true)
offlineDisks := storageInfo.Backend.OfflineDisks
onlineDisks := storageInfo.Backend.OnlineDisks
totalDisks := offlineDisks.Merge(onlineDisks)
// MinIO Offline Disks per node
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("minio", "disks", "offline"),
"Total number of offline disks in current MinIO server instance",
nil, nil),
prometheus.GaugeValue,
float64(offlineDisks.Sum()),
)
// MinIO Total Disks per node
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("minio", "disks", "total"),
"Total number of disks for current MinIO server instance",
nil, nil),
prometheus.GaugeValue,
float64(totalDisks.Sum()),
)
for i := 0; i < len(storageInfo.Total); i++ {
mountPath, total, free := storageInfo.MountPaths[i], storageInfo.Total[i],
storageInfo.Available[i]
// Total disk usage by the disk
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("disk", "storage", "used"),
"Total disk storage used on the disk",
[]string{"disk"}, nil),
prometheus.GaugeValue,
float64(total-free),
mountPath,
)
// Total available space in the disk
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("disk", "storage", "available"),
"Total available space left on the disk",
[]string{"disk"}, nil),
prometheus.GaugeValue,
float64(free),
mountPath,
)
// Total storage space of the disk
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("disk", "storage", "total"),
"Total space on the disk",
[]string{"disk"}, nil),
prometheus.GaugeValue,
float64(total),
mountPath,
)
}
connStats := globalConnStats.toServerConnStats()
// Network Sent/Received Bytes (internode)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("internode", "tx", "bytes_total"),
"Total number of bytes sent to the other peer nodes by current MinIO server instance",
nil, nil),
prometheus.CounterValue,
float64(connStats.TotalOutputBytes),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("internode", "rx", "bytes_total"),
"Total number of internode bytes received by current MinIO server instance",
nil, nil),
prometheus.CounterValue,
float64(connStats.TotalInputBytes),
)
// Network Sent/Received Bytes (Outbound)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("s3", "tx", "bytes_total"),
"Total number of s3 bytes sent by current MinIO server instance",
nil, nil),
prometheus.CounterValue,
float64(connStats.S3OutputBytes),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("s3", "rx", "bytes_total"),
"Total number of s3 bytes received by current MinIO server instance",
nil, nil),
prometheus.CounterValue,
float64(connStats.S3InputBytes),
)
httpStats := globalHTTPStats.toServerHTTPStats()
for api, value := range httpStats.CurrentS3Requests.APIStats {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("s3", "requests", "current"),
"Total number of running s3 requests in current MinIO server instance",
[]string{"api"}, nil),
prometheus.CounterValue,
float64(value),
api,
)
}
for api, value := range httpStats.TotalS3Requests.APIStats {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("s3", "requests", "total"),
"Total number of s3 requests in current MinIO server instance",
[]string{"api"}, nil),
prometheus.CounterValue,
float64(value),
api,
)
}
for api, value := range httpStats.TotalS3Errors.APIStats {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("s3", "errors", "total"),
"Total number of s3 errors in current MinIO server instance",
[]string{"api"}, nil),
prometheus.CounterValue,
float64(value),
api,
)
}
// Cache related metrics
if globalCacheConfig.Enabled {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("cache", "hits", "total"),
"Total number of disk cache hits in current MinIO instance",
nil, nil),
prometheus.CounterValue,
float64(newCachedObjectLayerFn().CacheStats().getHits()),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("cache", "misses", "total"),
"Total number of disk cache misses in current MinIO instance",
nil, nil),
prometheus.CounterValue,
float64(newCachedObjectLayerFn().CacheStats().getMisses()),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("cache", "data", "served"),
"Total number of bytes served from cache of current MinIO instance",
nil, nil),
prometheus.CounterValue,
float64(newCachedObjectLayerFn().CacheStats().getBytesServed()),
)
}
if globalIsGateway && (globalGatewayName == "s3" || globalGatewayName == "azure" || globalGatewayName == "gcs") {
m, _ := globalObjectAPI.GetMetrics(context.Background())
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "bytes_received"),
"Total number of bytes received by current MinIO Gateway "+globalGatewayName+" backend",
nil, nil),
prometheus.CounterValue,
float64(m.GetBytesReceived()),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "bytes_sent"),
"Total number of bytes sent by current MinIO Gateway to "+globalGatewayName+" backend",
nil, nil),
prometheus.CounterValue,
float64(m.GetBytesSent()),
)
s := m.GetRequests()
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "requests"),
"Total number of requests made to "+globalGatewayName+" by current MinIO Gateway",
[]string{"method"}, nil),
prometheus.CounterValue,
float64(s.Get.Load()),
http.MethodGet,
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "requests"),
"Total number of requests made to "+globalGatewayName+" by current MinIO Gateway",
[]string{"method"}, nil),
prometheus.CounterValue,
float64(s.Head.Load()),
http.MethodHead,
)
}
}
func metricsHandler() http.Handler {
registry := prometheus.NewRegistry()
err := registry.Register(minioVersionInfo)
logger.LogIf(context.Background(), err)
err = registry.Register(httpRequestsDuration)
logger.LogIf(context.Background(), err)
err = registry.Register(newMinioCollector())
logger.LogIf(context.Background(), err)
gatherers := prometheus.Gatherers{
prometheus.DefaultGatherer,
registry,
}
// Delegate http serving to Prometheus client library, which will call collector.Collect.
return promhttp.InstrumentMetricHandler(
registry,
promhttp.HandlerFor(gatherers,
promhttp.HandlerOpts{
ErrorHandling: promhttp.ContinueOnError,
}),
)
}
// AuthMiddleware checks if the bearer token is valid and authorized.
func AuthMiddleware(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
claims, _, authErr := webRequestAuthenticate(r)
if authErr != nil || !claims.VerifyIssuer("prometheus", true) {
w.WriteHeader(http.StatusForbidden)
return
}
h.ServeHTTP(w, r)
})
}