func getMasterMachine(clusterOpts *options.Options, mcluster *machine.Cluster, td *descriptions.TopologyDescription) (*machine.Machine, error) {
var m *machine.Machine
masterName := clusterOpts.String("master-machine-name")
if masterName != "" {
exists := false
m, exists = mcluster.Get(masterName)
if !exists {
logrus.Infof("cluster master machine is not exists, crating a new one. name:%s", masterName)
masterGroup := clusterOpts.String("master-machine-group")
md := td.GetMachineOptionsBy(masterGroup)
if md == nil {
return nil, fmt.Errorf("no machine options found for master '%s'", masterGroup)
}
m, err := mcluster.Create(masterName, md.DriverName, md)
if err != nil {
return nil, err
}
return m, nil
} else {
s := m.GetCachedState()
if !machine.IsRunning(s) {
logrus.Infof("master machine '%s' is '%s', try to restart.", masterName, s.String())
if err := m.Start(); err != nil {
return nil, fmt.Errorf("master machine '%s' exists, but start failed.", masterName)
}
}
return m, nil
}
} else {
logrus.Warnf("master name not specified in container cluster.")
}
return m, nil
}
