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545 lines
16 KiB
545 lines
16 KiB
/*
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* MinIO Cloud Storage, (C) 2018-2020 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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"net/http"
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"strings"
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"sync/atomic"
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"time"
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"github.com/minio/minio/cmd/config"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/env"
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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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storageMetricsPrometheus(ch)
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bucketUsageMetricsPrometheus(ch)
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networkMetricsPrometheus(ch)
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httpMetricsPrometheus(ch)
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cacheMetricsPrometheus(ch)
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gatewayMetricsPrometheus(ch)
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healingMetricsPrometheus(ch)
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}
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// collects healing specific metrics for MinIO instance in Prometheus specific format
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// and sends to given channel
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func healingMetricsPrometheus(ch chan<- prometheus.Metric) {
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if !globalIsErasure {
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return
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}
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bgSeq, exists := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
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if !exists {
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return
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}
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healMetricsNamespace := "self_heal"
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var dur time.Duration
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if !bgSeq.lastHealActivity.IsZero() {
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dur = time.Since(bgSeq.lastHealActivity)
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}
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(healMetricsNamespace, "time", "since_last_activity"),
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"Time elapsed (in nano seconds) since last self healing activity. This is set to -1 until initial self heal activity",
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nil, nil),
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prometheus.GaugeValue,
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float64(dur),
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)
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for k, v := range bgSeq.getScannedItemsMap() {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(healMetricsNamespace, "objects", "scanned"),
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"Objects scanned in current self healing run",
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[]string{"type"}, nil),
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prometheus.GaugeValue,
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float64(v), string(k),
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)
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}
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for k, v := range bgSeq.getHealedItemsMap() {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(healMetricsNamespace, "objects", "healed"),
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"Objects healed in current self healing run",
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[]string{"type"}, nil),
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prometheus.GaugeValue,
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float64(v), string(k),
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)
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}
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for k, v := range bgSeq.gethealFailedItemsMap() {
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// healFailedItemsMap stores the endpoint and volume state separated by comma,
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// split the fields and pass to channel at correct index
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s := strings.Split(k, ",")
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(healMetricsNamespace, "objects", "heal_failed"),
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"Objects for which healing failed in current self healing run",
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[]string{"mount_path", "volume_status"}, nil),
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prometheus.GaugeValue,
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float64(v), string(s[0]), string(s[1]),
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)
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}
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}
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// collects gateway specific metrics for MinIO instance in Prometheus specific format
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// and sends to given channel
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func gatewayMetricsPrometheus(ch chan<- prometheus.Metric) {
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if !globalIsGateway || (globalGatewayName != "s3" && globalGatewayName != "azure" && globalGatewayName != "gcs") {
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return
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}
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objLayer := newObjectLayerWithoutSafeModeFn()
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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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m, err := objLayer.GetMetrics(GlobalContext)
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if err != nil {
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return
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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_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(atomic.LoadUint64(&s.Get)),
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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(atomic.LoadUint64(&s.Head)),
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http.MethodHead,
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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(atomic.LoadUint64(&s.Put)),
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http.MethodPut,
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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(atomic.LoadUint64(&s.Post)),
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http.MethodPost,
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)
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}
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// collects cache metrics for MinIO server in Prometheus specific format
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// and sends to given channel
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func cacheMetricsPrometheus(ch chan<- prometheus.Metric) {
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cacheObjLayer := newCachedObjectLayerFn()
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// Service not initialized yet
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if cacheObjLayer == nil {
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return
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}
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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(cacheObjLayer.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(cacheObjLayer.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(cacheObjLayer.CacheStats().getBytesServed()),
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)
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for _, cdStats := range cacheObjLayer.CacheStats().GetDiskStats() {
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// Cache disk usage percentage
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("cache", "usage", "percent"),
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"Total percentage cache usage",
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[]string{"disk"}, nil),
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prometheus.GaugeValue,
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float64(cdStats.UsagePercent),
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cdStats.Dir,
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("cache", "usage", "high"),
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"Indicates cache usage is high or low, relative to current cache 'quota' settings",
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[]string{"disk"}, nil),
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prometheus.GaugeValue,
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float64(cdStats.UsageState),
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cdStats.Dir,
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)
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}
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}
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// collects http metrics for MinIO server in Prometheus specific format
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// and sends to given channel
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func httpMetricsPrometheus(ch chan<- prometheus.Metric) {
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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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}
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// collects network metrics for MinIO server in Prometheus specific format
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// and sends to given channel
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func networkMetricsPrometheus(ch chan<- prometheus.Metric) {
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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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}
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// Populates prometheus with bucket usage metrics, this metrics
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// is only enabled if crawler is enabled.
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func bucketUsageMetricsPrometheus(ch chan<- prometheus.Metric) {
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objLayer := newObjectLayerWithoutSafeModeFn()
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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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if globalIsGateway {
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return
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}
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// Crawler disabled, nothing to do.
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if env.Get(envDataUsageCrawlConf, config.EnableOn) != config.EnableOn {
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return
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}
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dataUsageInfo, err := loadDataUsageFromBackend(GlobalContext, objLayer)
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if err != nil {
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return
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}
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// data usage has not captured any data yet.
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if dataUsageInfo.LastUpdate.IsZero() {
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return
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}
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for bucket, usageInfo := range dataUsageInfo.BucketsUsage {
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// Total space used by bucket
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("bucket", "usage", "size"),
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"Total bucket size",
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[]string{"bucket"}, nil),
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prometheus.GaugeValue,
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float64(usageInfo.Size),
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bucket,
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)
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("bucket", "objects", "count"),
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"Total number of objects in a bucket",
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|
[]string{"bucket"}, nil),
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prometheus.GaugeValue,
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float64(usageInfo.ObjectsCount),
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bucket,
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)
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for k, v := range usageInfo.ObjectSizesHistogram {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName("bucket", "objects", "histogram"),
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|
"Total number of objects of different sizes in a bucket",
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|
[]string{"bucket", "object_size"}, nil),
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|
prometheus.GaugeValue,
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|
float64(v),
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bucket,
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k,
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)
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|
}
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|
}
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|
}
|
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|
|
// collects storage metrics for MinIO server in Prometheus specific format
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|
// and sends to given channel
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|
func storageMetricsPrometheus(ch chan<- prometheus.Metric) {
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objLayer := newObjectLayerWithoutSafeModeFn()
|
|
// Service not initialized yet
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|
if objLayer == nil {
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return
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}
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|
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// Fetch disk space info, ignore errors
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storageInfo, _ := objLayer.StorageInfo(GlobalContext, 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"),
|
|
"Total number of offline disks in current MinIO server instance",
|
|
nil, nil),
|
|
prometheus.GaugeValue,
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|
float64(offlineDisks.Sum()),
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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"),
|
|
"Total number of disks for current MinIO server instance",
|
|
nil, nil),
|
|
prometheus.GaugeValue,
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|
float64(totalDisks.Sum()),
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|
)
|
|
|
|
for _, disk := range storageInfo.Disks {
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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"),
|
|
"Total disk storage used on the disk",
|
|
[]string{"disk"}, nil),
|
|
prometheus.GaugeValue,
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|
float64(disk.UsedSpace),
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|
disk.DrivePath,
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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"),
|
|
"Total available space left on the disk",
|
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[]string{"disk"}, nil),
|
|
prometheus.GaugeValue,
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float64(disk.AvailableSpace),
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disk.DrivePath,
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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"),
|
|
"Total space on the disk",
|
|
[]string{"disk"}, nil),
|
|
prometheus.GaugeValue,
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|
float64(disk.TotalSpace),
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|
disk.DrivePath,
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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(GlobalContext, err)
|
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|
|
err = registry.Register(httpRequestsDuration)
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|
logger.LogIf(GlobalContext, err)
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|
|
err = registry.Register(newMinioCollector())
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logger.LogIf(GlobalContext, err)
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gatherers := prometheus.Gatherers{
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|
prometheus.DefaultGatherer,
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registry,
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|
}
|
|
// Delegate http serving to Prometheus client library, which will call collector.Collect.
|
|
return promhttp.InstrumentMetricHandler(
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|
registry,
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|
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)
|
|
})
|
|
}
|
|
|