mirror of
https://github.com/etcd-io/etcd.git
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4a5e9d1261
26 git mv mvcc wal auth etcdserver etcdmain proxy embed/ lease/ server 36 git mv go.mod go.sum server
99 lines
2.8 KiB
Go
99 lines
2.8 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 rafthttp
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import (
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/xiang90/probing"
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"go.uber.org/zap"
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)
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const (
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// RoundTripperNameRaftMessage is the name of round-tripper that sends
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// all other Raft messages, other than "snap.Message".
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RoundTripperNameRaftMessage = "ROUND_TRIPPER_RAFT_MESSAGE"
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// RoundTripperNameSnapshot is the name of round-tripper that sends merged snapshot message.
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RoundTripperNameSnapshot = "ROUND_TRIPPER_SNAPSHOT"
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)
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var (
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// proberInterval must be shorter than read timeout.
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// Or the connection will time-out.
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proberInterval = ConnReadTimeout - time.Second
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statusMonitoringInterval = 30 * time.Second
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statusErrorInterval = 5 * time.Second
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)
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func addPeerToProber(lg *zap.Logger, p probing.Prober, id string, us []string, roundTripperName string, rttSecProm *prometheus.HistogramVec) {
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hus := make([]string, len(us))
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for i := range us {
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hus[i] = us[i] + ProbingPrefix
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}
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p.AddHTTP(id, proberInterval, hus)
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s, err := p.Status(id)
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if err != nil {
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if lg != nil {
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lg.Warn("failed to add peer into prober", zap.String("remote-peer-id", id), zap.Error(err))
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}
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return
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}
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go monitorProbingStatus(lg, s, id, roundTripperName, rttSecProm)
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}
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func monitorProbingStatus(lg *zap.Logger, s probing.Status, id string, roundTripperName string, rttSecProm *prometheus.HistogramVec) {
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// set the first interval short to log error early.
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interval := statusErrorInterval
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for {
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select {
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case <-time.After(interval):
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if !s.Health() {
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if lg != nil {
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lg.Warn(
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"prober detected unhealthy status",
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zap.String("round-tripper-name", roundTripperName),
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zap.String("remote-peer-id", id),
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zap.Duration("rtt", s.SRTT()),
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zap.Error(s.Err()),
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)
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}
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interval = statusErrorInterval
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} else {
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interval = statusMonitoringInterval
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}
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if s.ClockDiff() > time.Second {
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if lg != nil {
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lg.Warn(
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"prober found high clock drift",
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zap.String("round-tripper-name", roundTripperName),
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zap.String("remote-peer-id", id),
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zap.Duration("clock-drift", s.ClockDiff()),
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zap.Duration("rtt", s.SRTT()),
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zap.Error(s.Err()),
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)
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}
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}
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rttSecProm.WithLabelValues(id).Observe(s.SRTT().Seconds())
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case <-s.StopNotify():
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return
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}
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}
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}
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