khenaidoo | ab1f7bd | 2019-11-14 14:00:27 -0500 | [diff] [blame] | 1 | // Copyright 2015 The etcd Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package rafthttp |
| 16 | |
| 17 | import ( |
| 18 | "errors" |
| 19 | "fmt" |
| 20 | "sync" |
| 21 | "time" |
| 22 | |
| 23 | "go.etcd.io/etcd/pkg/types" |
| 24 | |
| 25 | "go.uber.org/zap" |
| 26 | ) |
| 27 | |
| 28 | type failureType struct { |
| 29 | source string |
| 30 | action string |
| 31 | } |
| 32 | |
| 33 | type peerStatus struct { |
| 34 | lg *zap.Logger |
| 35 | local types.ID |
| 36 | id types.ID |
| 37 | mu sync.Mutex // protect variables below |
| 38 | active bool |
| 39 | since time.Time |
| 40 | } |
| 41 | |
| 42 | func newPeerStatus(lg *zap.Logger, local, id types.ID) *peerStatus { |
| 43 | return &peerStatus{lg: lg, local: local, id: id} |
| 44 | } |
| 45 | |
| 46 | func (s *peerStatus) activate() { |
| 47 | s.mu.Lock() |
| 48 | defer s.mu.Unlock() |
| 49 | if !s.active { |
| 50 | if s.lg != nil { |
| 51 | s.lg.Info("peer became active", zap.String("peer-id", s.id.String())) |
| 52 | } else { |
| 53 | plog.Infof("peer %s became active", s.id) |
| 54 | } |
| 55 | s.active = true |
| 56 | s.since = time.Now() |
| 57 | |
| 58 | activePeers.WithLabelValues(s.local.String(), s.id.String()).Inc() |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | func (s *peerStatus) deactivate(failure failureType, reason string) { |
| 63 | s.mu.Lock() |
| 64 | defer s.mu.Unlock() |
| 65 | msg := fmt.Sprintf("failed to %s %s on %s (%s)", failure.action, s.id, failure.source, reason) |
| 66 | if s.active { |
| 67 | if s.lg != nil { |
| 68 | s.lg.Warn("peer became inactive (message send to peer failed)", zap.String("peer-id", s.id.String()), zap.Error(errors.New(msg))) |
| 69 | } else { |
| 70 | plog.Errorf(msg) |
| 71 | plog.Infof("peer %s became inactive (message send to peer failed)", s.id) |
| 72 | } |
| 73 | s.active = false |
| 74 | s.since = time.Time{} |
| 75 | |
| 76 | activePeers.WithLabelValues(s.local.String(), s.id.String()).Dec() |
| 77 | disconnectedPeers.WithLabelValues(s.local.String(), s.id.String()).Inc() |
| 78 | return |
| 79 | } |
| 80 | |
| 81 | if s.lg != nil { |
| 82 | s.lg.Debug("peer deactivated again", zap.String("peer-id", s.id.String()), zap.Error(errors.New(msg))) |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | func (s *peerStatus) isActive() bool { |
| 87 | s.mu.Lock() |
| 88 | defer s.mu.Unlock() |
| 89 | return s.active |
| 90 | } |
| 91 | |
| 92 | func (s *peerStatus) activeSince() time.Time { |
| 93 | s.mu.Lock() |
| 94 | defer s.mu.Unlock() |
| 95 | return s.since |
| 96 | } |