func (mn *MasterNodes) findMaster() (string, error) {
master := mn.GetMaster()
if master != "" {
return master, nil
}
mn.mutex.Lock()
defer mn.mutex.Unlock()
if len(mn.nodes) == 0 {
return "", errors.New("No master node found!")
}
if mn.master == "" {
for _, m := range mn.nodes {
glog.V(4).Infof("Listing masters on %s", m)
if masters, e := operation.ListMasters(m); e == nil {
if len(masters) == 0 {
continue
}
mn.nodes = append(masters, m)
mn.master = mn.nodes[rand.Intn(len(mn.nodes))]
glog.V(2).Infof("current master nodes is (nodes:%v, master:%s)", mn.nodes, mn.master)
break
} else {
glog.V(4).Infof("Failed listing masters on %s: %v", m, e)
}
}
}
if mn.master == "" {
return "", errors.New("No master node available!")
}
return mn.master, nil
}
func (mn *MasterNodes) FindMaster() (string, error) {
if len(mn.nodes) == 0 {
return "", errors.New("No master node found!")
}
if mn.lastNode < 0 {
for _, m := range mn.nodes {
glog.V(4).Infof("Listing masters on %s", m)
if masters, e := operation.ListMasters(m); e == nil {
if len(masters) == 0 {
continue
}
mn.nodes = append(masters, m)
mn.lastNode = rand.Intn(len(mn.nodes))
glog.V(2).Infof("current master nodes is %v", mn)
break
} else {
glog.V(4).Infof("Failed listing masters on %s: %v", m, e)
}
}
}
if mn.lastNode < 0 {
return "", errors.New("No master node available!")
}
return mn.nodes[mn.lastNode], nil
}
