/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/ov_serf_windows.go is in golang-github-docker-libnetwork-dev 0.8.0-dev.2+git20170202.599.45b4086-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | package overlay
import (
"fmt"
"net"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/hashicorp/serf/serf"
)
type ovNotify struct {
action string
ep *endpoint
nw *network
}
type logWriter struct{}
func (l *logWriter) Write(p []byte) (int, error) {
str := string(p)
switch {
case strings.Contains(str, "[WARN]"):
logrus.Warn(str)
case strings.Contains(str, "[DEBUG]"):
logrus.Debug(str)
case strings.Contains(str, "[INFO]"):
logrus.Info(str)
case strings.Contains(str, "[ERR]"):
logrus.Error(str)
}
return len(p), nil
}
func (d *driver) serfInit() error {
var err error
config := serf.DefaultConfig()
config.Init()
config.MemberlistConfig.BindAddr = d.bindAddress
d.eventCh = make(chan serf.Event, 4)
config.EventCh = d.eventCh
config.UserCoalescePeriod = 1 * time.Second
config.UserQuiescentPeriod = 50 * time.Millisecond
config.LogOutput = &logWriter{}
config.MemberlistConfig.LogOutput = config.LogOutput
s, err := serf.Create(config)
if err != nil {
return fmt.Errorf("failed to create cluster node: %v", err)
}
defer func() {
if err != nil {
s.Shutdown()
}
}()
d.serfInstance = s
d.notifyCh = make(chan ovNotify)
d.exitCh = make(chan chan struct{})
go d.startSerfLoop(d.eventCh, d.notifyCh, d.exitCh)
return nil
}
func (d *driver) serfJoin(neighIP string) error {
if neighIP == "" {
return fmt.Errorf("no neighbor to join")
}
if _, err := d.serfInstance.Join([]string{neighIP}, false); err != nil {
return fmt.Errorf("Failed to join the cluster at neigh IP %s: %v",
neighIP, err)
}
return nil
}
func (d *driver) notifyEvent(event ovNotify) {
ep := event.ep
ePayload := fmt.Sprintf("%s %s %s %s", event.action, ep.addr.IP.String(),
net.IP(ep.addr.Mask).String(), ep.mac.String())
eName := fmt.Sprintf("jl %s %s %s", d.serfInstance.LocalMember().Addr.String(),
event.nw.id, ep.id)
if err := d.serfInstance.UserEvent(eName, []byte(ePayload), true); err != nil {
logrus.Errorf("Sending user event failed: %v\n", err)
}
}
func (d *driver) processEvent(u serf.UserEvent) {
logrus.Debugf("Received user event name:%s, payload:%s\n", u.Name,
string(u.Payload))
var dummy, action, vtepStr, nid, eid, ipStr, maskStr, macStr string
if _, err := fmt.Sscan(u.Name, &dummy, &vtepStr, &nid, &eid); err != nil {
fmt.Printf("Failed to scan name string: %v\n", err)
}
if _, err := fmt.Sscan(string(u.Payload), &action,
&ipStr, &maskStr, &macStr); err != nil {
fmt.Printf("Failed to scan value string: %v\n", err)
}
logrus.Debugf("Parsed data = %s/%s/%s/%s/%s/%s\n", nid, eid, vtepStr, ipStr, maskStr, macStr)
mac, err := net.ParseMAC(macStr)
if err != nil {
logrus.Errorf("Failed to parse mac: %v\n", err)
}
if d.serfInstance.LocalMember().Addr.String() == vtepStr {
return
}
switch action {
case "join":
if err := d.peerAdd(nid, eid, net.ParseIP(ipStr), net.IPMask(net.ParseIP(maskStr).To4()), mac,
net.ParseIP(vtepStr), true); err != nil {
logrus.Errorf("Peer add failed in the driver: %v\n", err)
}
case "leave":
if err := d.peerDelete(nid, eid, net.ParseIP(ipStr), net.IPMask(net.ParseIP(maskStr).To4()), mac,
net.ParseIP(vtepStr), true); err != nil {
logrus.Errorf("Peer delete failed in the driver: %v\n", err)
}
}
}
func (d *driver) startSerfLoop(eventCh chan serf.Event, notifyCh chan ovNotify,
exitCh chan chan struct{}) {
for {
select {
case notify, ok := <-notifyCh:
if !ok {
break
}
d.notifyEvent(notify)
case ch, ok := <-exitCh:
if !ok {
break
}
if err := d.serfInstance.Leave(); err != nil {
logrus.Errorf("failed leaving the cluster: %v\n", err)
}
d.serfInstance.Shutdown()
close(ch)
return
case e, ok := <-eventCh:
if !ok {
break
}
u, ok := e.(serf.UserEvent)
if !ok {
break
}
d.processEvent(u)
}
}
}
func (d *driver) isSerfAlive() bool {
d.Lock()
serfInstance := d.serfInstance
d.Unlock()
if serfInstance == nil || serfInstance.State() != serf.SerfAlive {
return false
}
return true
}
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