func Init() (env.Backend, error) {
virt, err := virt.NewConn()
if err != nil {
return nil, fmt.Errorf("backend: Error connecting to libvirt: '%s'", err)
}
b := &backend{
redisPool: redis.NewPool(),
virt: virt,
}
err = b.Redis().LoadScripts()
if err != nil {
return nil, err
}
go cmd.Listen(b, cmd.GlobalQueue)
go cmd.Listen(b, cmd.QueueByClassAndID(cmd.Host, config.Conf.HostID.String()))
go scheduler.Listen(b, model.GlobalClusterID)
go b.monitor()
return b, nil
}
func addHostToCluster(backend env.Backend, params ClusterHostParams) (result interface{}, err error) {
conn := backend.Redis()
defer conn.Close()
hostID := config.Conf.HostID.String()
conn.Send("MULTI")
conn.Send("SADD", "Cluster:"+params.ClusterID, hostID)
conn.Send("SADD", "Host:"+hostID+":clusters", params.ClusterID)
_, err = conn.Do("EXEC")
go scheduler.Listen(backend, params.ClusterID)
return "Added", err
}