// BindControl binds a local socket for the control API.
func (m *Manager) BindControl(addr string) error {
m.addrMu.Lock()
defer m.addrMu.Unlock()
if m.config.ControlAPI != "" {
return errors.New("manager already has a control API address")
}
// don't create a socket directory if we're on windows. we used named pipe
if runtime.GOOS != "windows" {
err := os.MkdirAll(filepath.Dir(addr), 0700)
if err != nil {
return errors.Wrap(err, "failed to create socket directory")
}
}
l, err := xnet.ListenLocal(addr)
// A unix socket may fail to bind if the file already
// exists. Try replacing the file.
if runtime.GOOS != "windows" {
unwrappedErr := err
if op, ok := unwrappedErr.(*net.OpError); ok {
unwrappedErr = op.Err
}
if sys, ok := unwrappedErr.(*os.SyscallError); ok {
unwrappedErr = sys.Err
}
if unwrappedErr == syscall.EADDRINUSE {
os.Remove(addr)
l, err = xnet.ListenLocal(addr)
}
}
if err != nil {
return errors.Wrap(err, "failed to listen on control API address")
}
m.config.ControlAPI = addr
m.controlListener <- l
return nil
}
// New creates a Manager which has not started to accept requests yet.
func New(config *Config) (*Manager, error) {
dispatcherConfig := dispatcher.DefaultConfig()
// If an AdvertiseAddr was specified, we use that as our
// externally-reachable address.
advertiseAddr := config.RemoteAPI.AdvertiseAddr
var advertiseAddrPort string
if advertiseAddr == "" {
// Otherwise, we know we are joining an existing swarm. Use a
// wildcard address to trigger remote autodetection of our
// address.
var err error
_, advertiseAddrPort, err = net.SplitHostPort(config.RemoteAPI.ListenAddr)
if err != nil {
return nil, fmt.Errorf("missing or invalid listen address %s", config.RemoteAPI.ListenAddr)
}
// Even with an IPv6 listening address, it's okay to use
// 0.0.0.0 here. Any "unspecified" (wildcard) IP will
// be substituted with the actual source address.
advertiseAddr = net.JoinHostPort("0.0.0.0", advertiseAddrPort)
}
err := os.MkdirAll(config.StateDir, 0700)
if err != nil {
return nil, errors.Wrap(err, "failed to create state directory")
}
raftStateDir := filepath.Join(config.StateDir, "raft")
err = os.MkdirAll(raftStateDir, 0700)
if err != nil {
return nil, errors.Wrap(err, "failed to create raft state directory")
}
var listeners []net.Listener
// don't create a socket directory if we're on windows. we used named pipe
if runtime.GOOS != "windows" {
err := os.MkdirAll(filepath.Dir(config.ControlAPI), 0700)
if err != nil {
return nil, errors.Wrap(err, "failed to create socket directory")
}
}
l, err := xnet.ListenLocal(config.ControlAPI)
// A unix socket may fail to bind if the file already
// exists. Try replacing the file.
if runtime.GOOS != "windows" {
unwrappedErr := err
if op, ok := unwrappedErr.(*net.OpError); ok {
unwrappedErr = op.Err
}
if sys, ok := unwrappedErr.(*os.SyscallError); ok {
unwrappedErr = sys.Err
}
if unwrappedErr == syscall.EADDRINUSE {
os.Remove(config.ControlAPI)
l, err = xnet.ListenLocal(config.ControlAPI)
}
}
if err != nil {
return nil, errors.Wrap(err, "failed to listen on control API address")
}
listeners = append(listeners, l)
l, err = net.Listen("tcp", config.RemoteAPI.ListenAddr)
if err != nil {
return nil, errors.Wrap(err, "failed to listen on remote API address")
}
if advertiseAddrPort == "0" {
advertiseAddr = l.Addr().String()
config.RemoteAPI.ListenAddr = advertiseAddr
}
listeners = append(listeners, l)
raftCfg := raft.DefaultNodeConfig()
if config.ElectionTick > 0 {
raftCfg.ElectionTick = int(config.ElectionTick)
}
if config.HeartbeatTick > 0 {
raftCfg.HeartbeatTick = int(config.HeartbeatTick)
}
newNodeOpts := raft.NodeOptions{
ID: config.SecurityConfig.ClientTLSCreds.NodeID(),
Addr: advertiseAddr,
JoinAddr: config.JoinRaft,
Config: raftCfg,
StateDir: raftStateDir,
ForceNewCluster: config.ForceNewCluster,
TLSCredentials: config.SecurityConfig.ClientTLSCreds,
}
raftNode := raft.NewNode(newNodeOpts)
opts := []grpc.ServerOption{
grpc.Creds(config.SecurityConfig.ServerTLSCreds)}
m := &Manager{
config: config,
listeners: listeners,
caserver: ca.NewServer(raftNode.MemoryStore(), config.SecurityConfig),
dispatcher: dispatcher.New(raftNode, dispatcherConfig),
logbroker: logbroker.New(),
server: grpc.NewServer(opts...),
localserver: grpc.NewServer(opts...),
raftNode: raftNode,
started: make(chan struct{}),
}
return m, nil
}