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339 lines
9.9 KiB
339 lines
9.9 KiB
/*
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* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"net/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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var (
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httpRequestsDuration = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "s3_ttfb_seconds",
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Help: "Time taken by requests served by current MinIO server 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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minioVersionInfo = prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: "minio",
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Name: "version_info",
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Help: "Version of current MinIO server instance",
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},
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[]string{
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// current version
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"version",
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// commit-id of the current version
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"commit",
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},
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)
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)
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func init() {
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prometheus.MustRegister(httpRequestsDuration)
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prometheus.MustRegister(newMinioCollector())
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prometheus.MustRegister(minioVersionInfo)
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}
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// newMinioCollector describes the collector
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// and returns reference of minioCollector
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// It creates the Prometheus Description which is used
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// to define metric and help string
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func newMinioCollector() *minioCollector {
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return &minioCollector{
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desc: prometheus.NewDesc("minio_stats", "Statistics exposed by MinIO server", nil, nil),
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}
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}
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// minioCollector is the Custom Collector
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type minioCollector struct {
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desc *prometheus.Desc
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}
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// Describe sends the super-set of all possible descriptors of metrics
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func (c *minioCollector) Describe(ch chan<- *prometheus.Desc) {
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ch <- c.desc
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}
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// Collect is called by the Prometheus registry when collecting metrics.
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func (c *minioCollector) Collect(ch chan<- prometheus.Metric) {
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// Expose MinIO's version information
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minioVersionInfo.WithLabelValues(Version, CommitID).Set(float64(1.0))
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// Fetch disk space info
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objLayer := newObjectLayerFn()
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// Service not initialized yet
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if objLayer == nil {
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return
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}
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storageInfo := objLayer.StorageInfo(context.Background(), true)
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offlineDisks := storageInfo.Backend.OfflineDisks
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onlineDisks := storageInfo.Backend.OnlineDisks
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totalDisks := offlineDisks.Merge(onlineDisks)
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// MinIO Offline Disks per node
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("minio", "disks", "offline"),
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"Total number of offline disks in current MinIO server instance",
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nil, nil),
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prometheus.GaugeValue,
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float64(offlineDisks.Sum()),
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)
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// MinIO Total Disks per node
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("minio", "disks", "total"),
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"Total number of disks for current MinIO server instance",
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nil, nil),
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prometheus.GaugeValue,
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float64(totalDisks.Sum()),
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)
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for i := 0; i < len(storageInfo.Total); i++ {
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mountPath, total, free := storageInfo.MountPaths[i], storageInfo.Total[i],
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storageInfo.Available[i]
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// Total disk usage by the disk
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("disk", "storage", "used"),
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"Total disk storage used on the disk",
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[]string{"disk"}, nil),
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prometheus.GaugeValue,
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float64(total-free),
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mountPath,
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)
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// Total available space in the disk
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("disk", "storage", "available"),
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"Total available space left on the disk",
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[]string{"disk"}, nil),
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prometheus.GaugeValue,
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float64(free),
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mountPath,
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)
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// Total storage space of the disk
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("disk", "storage", "total"),
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"Total space on the disk",
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[]string{"disk"}, nil),
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prometheus.GaugeValue,
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float64(total),
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mountPath,
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)
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}
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connStats := globalConnStats.toServerConnStats()
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// Network Sent/Received Bytes (internode)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("internode", "tx", "bytes_total"),
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"Total number of bytes sent to the other peer nodes by current MinIO server instance",
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nil, nil),
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prometheus.CounterValue,
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float64(connStats.TotalOutputBytes),
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("internode", "rx", "bytes_total"),
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"Total number of internode bytes received by current MinIO server instance",
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nil, nil),
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prometheus.CounterValue,
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float64(connStats.TotalInputBytes),
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)
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// Network Sent/Received Bytes (Outbound)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("s3", "tx", "bytes_total"),
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"Total number of s3 bytes sent by current MinIO server instance",
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nil, nil),
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prometheus.CounterValue,
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float64(connStats.S3OutputBytes),
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("s3", "rx", "bytes_total"),
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"Total number of s3 bytes received by current MinIO server instance",
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nil, nil),
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prometheus.CounterValue,
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float64(connStats.S3InputBytes),
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)
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httpStats := globalHTTPStats.toServerHTTPStats()
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for api, value := range httpStats.CurrentS3Requests.APIStats {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("s3", "requests", "current"),
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"Total number of running s3 requests in current MinIO server 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 httpStats.TotalS3Requests.APIStats {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("s3", "requests", "total"),
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"Total number of s3 requests in current MinIO server 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 httpStats.TotalS3Errors.APIStats {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("s3", "errors", "total"),
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"Total number of s3 errors in current MinIO server 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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// Cache related metrics
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if globalCacheConfig.Enabled {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("cache", "hits", "total"),
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"Total number of disk cache hits in current MinIO instance",
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nil, nil),
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prometheus.CounterValue,
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float64(newCachedObjectLayerFn().CacheStats().getHits()),
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("cache", "misses", "total"),
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"Total number of disk cache misses in current MinIO instance",
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nil, nil),
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prometheus.CounterValue,
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float64(newCachedObjectLayerFn().CacheStats().getMisses()),
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("cache", "data", "served"),
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"Total number of bytes served from cache of current MinIO instance",
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nil, nil),
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prometheus.CounterValue,
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float64(newCachedObjectLayerFn().CacheStats().getBytesServed()),
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)
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}
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if globalIsGateway && (globalGatewayName == "s3" || globalGatewayName == "azure" || globalGatewayName == "gcs") {
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m, _ := globalObjectAPI.GetMetrics(context.Background())
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("gateway", globalGatewayName, "bytes_received"),
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"Total number of bytes received by current MinIO Gateway "+globalGatewayName+" backend",
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nil, nil),
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prometheus.CounterValue,
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float64(m.GetBytesReceived()),
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("gateway", globalGatewayName, "bytes_sent"),
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"Total number of bytes sent by current MinIO Gateway to "+globalGatewayName+" backend",
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nil, nil),
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prometheus.CounterValue,
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float64(m.GetBytesSent()),
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)
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s := m.GetRequests()
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("gateway", globalGatewayName, "requests"),
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"Total number of requests made to "+globalGatewayName+" by current MinIO Gateway",
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[]string{"method"}, nil),
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prometheus.CounterValue,
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float64(s.Get.Load()),
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http.MethodGet,
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("gateway", globalGatewayName, "requests"),
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"Total number of requests made to "+globalGatewayName+" by current MinIO Gateway",
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[]string{"method"}, nil),
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prometheus.CounterValue,
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float64(s.Head.Load()),
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http.MethodHead,
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)
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}
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}
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func metricsHandler() http.Handler {
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registry := prometheus.NewRegistry()
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err := registry.Register(minioVersionInfo)
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logger.LogIf(context.Background(), err)
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err = registry.Register(httpRequestsDuration)
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logger.LogIf(context.Background(), err)
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err = registry.Register(newMinioCollector())
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logger.LogIf(context.Background(), err)
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gatherers := prometheus.Gatherers{
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prometheus.DefaultGatherer,
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registry,
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}
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// Delegate http serving to Prometheus client library, which will call collector.Collect.
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return promhttp.InstrumentMetricHandler(
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registry,
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promhttp.HandlerFor(gatherers,
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promhttp.HandlerOpts{
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ErrorHandling: promhttp.ContinueOnError,
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}),
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)
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}
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// AuthMiddleware checks if the bearer token is valid and authorized.
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func AuthMiddleware(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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claims, _, authErr := webRequestAuthenticate(r)
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if authErr != nil || !claims.VerifyIssuer("prometheus", true) {
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w.WriteHeader(http.StatusForbidden)
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return
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}
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h.ServeHTTP(w, r)
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})
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}
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