mirror of https://github.com/k3s-io/k3s
244 lines
8.0 KiB
Go
244 lines
8.0 KiB
Go
// Copyright 2015 The etcd Authors
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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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package etcdserver
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import (
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goruntime "runtime"
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"time"
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"go.etcd.io/etcd/pkg/runtime"
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"go.etcd.io/etcd/version"
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"github.com/prometheus/client_golang/prometheus"
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"go.uber.org/zap"
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)
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var (
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hasLeader = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "has_leader",
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Help: "Whether or not a leader exists. 1 is existence, 0 is not.",
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})
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isLeader = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "is_leader",
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Help: "Whether or not this member is a leader. 1 if is, 0 otherwise.",
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})
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leaderChanges = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "leader_changes_seen_total",
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Help: "The number of leader changes seen.",
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})
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isLearner = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "is_learner",
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Help: "Whether or not this member is a learner. 1 if is, 0 otherwise.",
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})
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learnerPromoteFailed = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "learner_promote_failures",
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Help: "The total number of failed learner promotions (likely learner not ready) while this member is leader.",
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},
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[]string{"Reason"},
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)
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learnerPromoteSucceed = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "learner_promote_successes",
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Help: "The total number of successful learner promotions while this member is leader.",
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})
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heartbeatSendFailures = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "heartbeat_send_failures_total",
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Help: "The total number of leader heartbeat send failures (likely overloaded from slow disk).",
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})
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slowApplies = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "slow_apply_total",
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Help: "The total number of slow apply requests (likely overloaded from slow disk).",
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})
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applySnapshotInProgress = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "snapshot_apply_in_progress_total",
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Help: "1 if the server is applying the incoming snapshot. 0 if none.",
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})
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proposalsCommitted = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "proposals_committed_total",
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Help: "The total number of consensus proposals committed.",
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})
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proposalsApplied = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "proposals_applied_total",
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Help: "The total number of consensus proposals applied.",
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})
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proposalsPending = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "proposals_pending",
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Help: "The current number of pending proposals to commit.",
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})
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proposalsFailed = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "proposals_failed_total",
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Help: "The total number of failed proposals seen.",
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})
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slowReadIndex = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "slow_read_indexes_total",
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Help: "The total number of pending read indexes not in sync with leader's or timed out read index requests.",
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})
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readIndexFailed = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "read_indexes_failed_total",
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Help: "The total number of failed read indexes seen.",
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})
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leaseExpired = prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "etcd_debugging",
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Subsystem: "server",
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Name: "lease_expired_total",
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Help: "The total number of expired leases.",
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})
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quotaBackendBytes = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "quota_backend_bytes",
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Help: "Current backend storage quota size in bytes.",
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})
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currentVersion = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "version",
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Help: "Which version is running. 1 for 'server_version' label with current version.",
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},
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[]string{"server_version"})
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currentGoVersion = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "go_version",
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Help: "Which Go version server is running with. 1 for 'server_go_version' label with current version.",
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},
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[]string{"server_go_version"})
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serverID = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: "etcd",
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Subsystem: "server",
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Name: "id",
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Help: "Server or member ID in hexadecimal format. 1 for 'server_id' label with current ID.",
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},
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[]string{"server_id"})
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fdUsed = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "os",
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Subsystem: "fd",
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Name: "used",
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Help: "The number of used file descriptors.",
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})
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fdLimit = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "os",
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Subsystem: "fd",
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Name: "limit",
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Help: "The file descriptor limit.",
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})
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)
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func init() {
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prometheus.MustRegister(hasLeader)
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prometheus.MustRegister(isLeader)
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prometheus.MustRegister(leaderChanges)
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prometheus.MustRegister(heartbeatSendFailures)
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prometheus.MustRegister(slowApplies)
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prometheus.MustRegister(applySnapshotInProgress)
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prometheus.MustRegister(proposalsCommitted)
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prometheus.MustRegister(proposalsApplied)
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prometheus.MustRegister(proposalsPending)
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prometheus.MustRegister(proposalsFailed)
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prometheus.MustRegister(slowReadIndex)
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prometheus.MustRegister(readIndexFailed)
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prometheus.MustRegister(leaseExpired)
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prometheus.MustRegister(quotaBackendBytes)
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prometheus.MustRegister(currentVersion)
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prometheus.MustRegister(currentGoVersion)
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prometheus.MustRegister(serverID)
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prometheus.MustRegister(isLearner)
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prometheus.MustRegister(learnerPromoteSucceed)
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prometheus.MustRegister(learnerPromoteFailed)
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prometheus.MustRegister(fdUsed)
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prometheus.MustRegister(fdLimit)
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currentVersion.With(prometheus.Labels{
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"server_version": version.Version,
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}).Set(1)
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currentGoVersion.With(prometheus.Labels{
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"server_go_version": goruntime.Version(),
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}).Set(1)
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}
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func monitorFileDescriptor(lg *zap.Logger, done <-chan struct{}) {
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// This ticker will check File Descriptor Requirements ,and count all fds in used.
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// And recorded some logs when in used >= limit/5*4. Just recorded message.
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// If fds was more than 10K,It's low performance due to FDUsage() works.
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// So need to increase it.
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// See https://github.com/etcd-io/etcd/issues/11969 for more detail.
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ticker := time.NewTicker(10 * time.Minute)
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defer ticker.Stop()
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for {
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used, err := runtime.FDUsage()
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if err != nil {
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if lg != nil {
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lg.Warn("failed to get file descriptor usage", zap.Error(err))
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} else {
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plog.Errorf("cannot monitor file descriptor usage (%v)", err)
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}
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return
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}
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fdUsed.Set(float64(used))
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limit, err := runtime.FDLimit()
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if err != nil {
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if lg != nil {
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lg.Warn("failed to get file descriptor limit", zap.Error(err))
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} else {
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plog.Errorf("cannot monitor file descriptor usage (%v)", err)
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}
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return
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}
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fdLimit.Set(float64(limit))
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if used >= limit/5*4 {
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if lg != nil {
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lg.Warn("80% of file descriptors are used", zap.Uint64("used", used), zap.Uint64("limit", limit))
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} else {
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plog.Warningf("80%% of the file descriptor limit is used [used = %d, limit = %d]", used, limit)
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}
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}
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select {
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case <-ticker.C:
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case <-done:
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return
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}
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}
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}
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