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/
zk.go
153 lines (127 loc) · 3.13 KB
/
zk.go
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package mesos
import (
"encoding/binary"
"fmt"
"net"
"time"
"github.com/mesos/mesos-go/detector"
_ "github.com/mesos/mesos-go/detector/zoo"
proto "github.com/mesos/mesos-go/mesosproto"
log "github.com/sirupsen/logrus"
)
func (m *Mesos) OnMasterChanged(leader *proto.MasterInfo) {
m.Lock.Lock()
defer m.Lock.Unlock()
m.started.Do(func() { close(m.startChan) })
m.Leader = leader
}
func (m *Mesos) UpdatedMasters(masters []*proto.MasterInfo) {
m.Lock.Lock()
defer m.Lock.Unlock()
m.Masters = masters
}
func (m *Mesos) zkDetector(zkURI string) {
if zkURI == "" {
log.Fatal("Zookeeper address not provided")
}
log.WithField("zk", zkURI).Debug("Zookeeper address")
md, err := detector.New(zkURI)
if err != nil {
log.Fatal(err.Error())
}
m.startChan = make(chan struct{})
md.Detect(m)
select {
case <-m.startChan:
log.Info("Done waiting for initial leader information from Zookeeper.")
case <-time.After(2 * time.Minute):
log.Fatal("Timed out waiting for initial ZK detection.")
}
}
// Get the leader out of the list of masters
//
func (m *Mesos) getLeader() *MesosHost {
m.Lock.Lock()
defer m.Lock.Unlock()
return MasterInfoToMesosHost(m.Leader)
}
func (m *Mesos) getMasters() []*MesosHost {
m.Lock.Lock()
defer m.Lock.Unlock()
ms := make([]*MesosHost, len(m.Masters))
for i, msp := range m.Masters {
mh := MasterInfoToMesosHost(msp)
if *m.Leader.Id == *msp.Id {
mh.IsLeader = true
}
ms[i] = mh
}
return ms
}
func MasterInfoToMesosHost(mi *proto.MasterInfo) *MesosHost {
if mi == nil {
return &MesosHost{
Host: "",
Ip: "",
Port: 0,
PortString: "",
IsLeader: false,
IsRegistered: false,
}
}
addr := mi.GetAddress()
if addr.GetHostname() != "" {
return &MesosHost{
Host: addr.GetHostname(),
Ip: addr.GetIp(),
Port: int(addr.GetPort()),
PortString: fmt.Sprintf("%d", addr.GetPort()),
IsLeader: false,
IsRegistered: false,
}
} else {
log.Debug("Using old protobuf format")
// Old protobuf format
return ProtoBufToMesosHost(mi)
}
}
func ProtoBufToMesosHost(mi *proto.MasterInfo) *MesosHost {
ipstring := ""
port := ""
log.WithField("mi.GetHostname()", mi.GetHostname()).Debug("protobuf MasterInfo")
log.WithField("mi.GetIp()", packedIpToString(mi.GetIp())).Debug("protobuf MasterInfo")
log.WithField("mi.GetPort()", fmt.Sprint(mi.GetPort())).Debug("protobuf MasterInfo")
if host := mi.GetHostname(); host != "" {
if ip, err := net.LookupIP(host); err == nil {
for _, i := range ip {
if four := i.To4(); four != nil {
ipstring = i.String()
break
}
}
}
}
if ipstring == "" {
ipstring = packedIpToString(mi.GetIp())
}
if ipstring == "" {
ipstring = mi.GetHostname()
}
if len(ipstring) > 0 {
port = fmt.Sprint(mi.GetPort())
}
return &MesosHost{
Host: mi.GetHostname(),
Ip: ipstring,
Port: int(mi.GetPort()),
PortString: port,
IsLeader: false,
IsRegistered: false,
}
}
func packedIpToString(p uint32) string {
octets := make([]byte, 4, 4)
binary.LittleEndian.PutUint32(octets, p)
ipv4 := net.IP(octets)
return ipv4.String()
}