func Tutum() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
if len(ctx.Args) == 2 {
tutum.User = ctx.Args[0]
tutum.ApiKey = ctx.Args[1]
}
if !tutum.IsAuthenticated() {
return fmt.Errorf("You need to provide your Tutum credentials in ~/.tutum or environment variables TUTUM_USER and TUTUM_APIKEY")
}
tutumDockerConnector, err := newConnector(tutumConnectorHost, tutumConnectorVersion)
if err != nil {
return fmt.Errorf("%v", err)
}
t := &tutumBackend{
tutumDockerConnector: tutumDockerConnector,
Server: beam.NewServer(),
}
t.Server.OnAttach(beam.Handler(t.attach))
t.Server.OnStart(beam.Handler(t.ack))
t.Server.OnLs(beam.Handler(t.ls))
t.Server.OnSpawn(beam.Handler(t.spawn))
_, err = ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: t.Server})
return err
}))
return backend
}
func (t *tutumBackend) newContainer(id string) beam.Sender {
c := &tutumContainer{tutumBackend: t, id: id}
instance := beam.NewServer()
instance.OnGet(beam.Handler(c.get))
instance.OnStart(beam.Handler(c.start))
instance.OnStop(beam.Handler(c.stop))
return instance
}
func (b *dockerClientBackend) newContainer(id string) beam.Sender {
c := &container{backend: b, id: id}
instance := beam.NewServer()
instance.OnAttach(beam.Handler(c.attach))
instance.OnStart(beam.Handler(c.start))
instance.OnStop(beam.Handler(c.stop))
instance.OnGet(beam.Handler(c.get))
return instance
}
func cmdDaemon(c *cli.Context) {
app := beam.NewServer()
app.OnLog(beam.Handler(func(msg *beam.Message) error {
log.Printf("%s\n", strings.Join(msg.Args, " "))
return nil
}))
app.OnError(beam.Handler(func(msg *beam.Message) error {
Fatalf("Fatal: %v", strings.Join(msg.Args[:1], ""))
return nil
}))
back := backends.New()
if len(c.Args()) == 0 {
names, err := back.Ls()
if err != nil {
Fatalf("ls: %v", err)
}
fmt.Println(strings.Join(names, "\n"))
return
}
var previousInstanceR beam.Receiver
// FIXME: refactor into a Pipeline
for idx, backendArg := range c.Args() {
bName, bArgs, err := parseCmd(backendArg)
if err != nil {
Fatalf("parse: %v", err)
}
_, backend, err := back.Attach(bName)
if err != nil {
Fatalf("%s: %v\n", bName, err)
}
instance, err := backend.Spawn(bArgs...)
if err != nil {
Fatalf("spawn %s: %v\n", bName, err)
}
instanceR, instanceW, err := instance.Attach("")
if err != nil {
Fatalf("attach: %v", err)
}
go func(r beam.Receiver, w beam.Sender, idx int) {
if r != nil {
beam.Copy(w, r)
}
w.Close()
}(previousInstanceR, instanceW, idx)
if err := instance.Start(); err != nil {
Fatalf("start: %v", err)
}
previousInstanceR = instanceR
}
_, err := beam.Copy(app, previousInstanceR)
if err != nil {
Fatalf("copy: %v", err)
}
}
// The Debug service is an example of intercepting messages between a receiver and a sender.
// The service also exposes messages passing through it for debug purposes.
func Debug() beam.Sender {
dbgInstance := &debug{
service: beam.NewServer(),
}
sender := beam.NewServer()
sender.OnSpawn(beam.Handler(dbgInstance.spawn))
return sender
}
func Shipyard() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
if len(ctx.Args) != 3 {
return fmt.Errorf("Shipyard: Usage <shipyard URL> <user> <pass>")
}
c := &shipyard{url: ctx.Args[0], user: ctx.Args[1], pass: ctx.Args[2]}
c.Server = beam.NewServer()
c.Server.OnAttach(beam.Handler(c.attach))
c.Server.OnStart(beam.Handler(c.start))
c.Server.OnLs(beam.Handler(c.containers))
c.OnGet(beam.Handler(c.containerInspect))
_, err := ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: c.Server})
return err
}))
return backend
}
func Simulator() beam.Sender {
s := beam.NewServer()
s.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
containers := ctx.Args
instance := beam.Task(func(in beam.Receiver, out beam.Sender) {
beam.Obj(out).Log("[simulator] starting\n")
s := beam.NewServer()
s.OnLs(beam.Handler(func(msg *beam.Message) error {
beam.Obj(out).Log("[simulator] generating fake list of objects...\n")
beam.Obj(msg.Ret).Set(containers...)
return nil
}))
beam.Copy(s, in)
})
ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: instance})
return nil
}))
return s
}
func Aggregate() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
allBackends := New()
instance := beam.NewServer()
a, err := newAggregator(allBackends, instance, ctx.Args)
if err != nil {
return err
}
instance.OnAttach(beam.Handler(a.attach))
instance.OnStart(beam.Handler(a.start))
instance.OnLs(beam.Handler(a.ls))
_, err = ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: instance})
return err
}))
return backend
}
func cmdDaemon(c *cli.Context) {
app := beam.NewServer()
app.OnLog(beam.Handler(func(msg *beam.Message) error {
utils.Debugf("%s", strings.Join(msg.Args, " "))
return nil
}))
app.OnError(beam.Handler(func(msg *beam.Message) error {
Fatalf("Fatal: %v", strings.Join(msg.Args[:1], ""))
return nil
}))
backend := beam.Object{backends.Forward()}
dockerHost := os.Getenv("DOCKER_HOST")
if dockerHost == "" {
dockerHost = "unix:///var/run/docker.sock"
}
instance, err := backend.Spawn(dockerHost)
if err != nil {
Fatalf("spawn: %v\n", err)
}
instanceR, instanceW, err := instance.Attach("")
if err != nil {
Fatalf("attach: %v", err)
}
defer instanceW.Close()
go beam.Copy(app, instanceR)
if err := instance.Start(); err != nil {
Fatalf("start: %v", err)
}
err = doCmd(instance, c.Args())
if err != nil {
Fatalf("%v", err)
}
}
func DockerClientWithConfig(config *DockerClientConfig) beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
if len(ctx.Args) != 1 {
return fmt.Errorf("dockerclient: spawn takes exactly 1 argument, got %d", len(ctx.Args))
}
client := newClient()
client.scheme = config.Scheme
client.urlHost = config.URLHost
client.transport.TLSClientConfig = config.TLSClientConfig
client.setURL(ctx.Args[0])
b := &dockerClientBackend{
client: client,
Server: beam.NewServer(),
}
b.Server.OnAttach(beam.Handler(b.attach))
b.Server.OnStart(beam.Handler(b.start))
b.Server.OnLs(beam.Handler(b.ls))
b.Server.OnSpawn(beam.Handler(b.spawn))
_, err := ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: b.Server})
return err
}))
return backend
}
func DockerServer() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
instance := beam.Task(func(in beam.Receiver, out beam.Sender) {
url := "tcp://localhost:4243"
if len(ctx.Args) > 0 {
url = ctx.Args[0]
}
err := listenAndServe(url, out)
if err != nil {
fmt.Printf("listenAndServe: %v", err)
}
})
_, err := ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: instance})
return err
}))
return backend
}
func FakeClient() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
// Instantiate a new fakeclient instance
instance := beam.Task(func(in beam.Receiver, out beam.Sender) {
fmt.Printf("fake client!\n")
defer fmt.Printf("end of fake client!\n")
o := beam.Obj(out)
o.Log("fake client starting")
defer o.Log("fake client terminating")
for {
time.Sleep(1 * time.Second)
o.Log("fake client heartbeat!")
}
})
_, err := ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: instance})
return err
}))
return backend
}
func Orchard() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
if len(ctx.Args) != 2 {
return fmt.Errorf("orchard: spawn expects 2 arguments: API token and name of host")
}
apiToken, hostName := ctx.Args[0], ctx.Args[1]
apiClient := &api.HTTPClient{
BaseURL: "https://api.orchardup.com/v2",
Token: apiToken,
}
host, err := apiClient.GetHost(hostName)
if err != nil {
return err
}
url := fmt.Sprintf("tcp://%s:4243", host.IPAddress)
tlsConfig, err := getTLSConfig([]byte(host.ClientCert), []byte(host.ClientKey))
if err != nil {
return err
}
backend := DockerClientWithConfig(&DockerClientConfig{
Scheme: "https",
URLHost: host.IPAddress,
TLSClientConfig: tlsConfig,
})
forwardBackend := beam.Obj(backend)
forwardInstance, err := forwardBackend.Spawn(url)
if err != nil {
return err
}
_, err = ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: forwardInstance})
return err
}))
return backend
}
func Debug() beam.Sender {
backend := beam.NewServer()
backend.OnSpawn(beam.Handler(func(ctx *beam.Message) error {
instance := beam.Task(func(in beam.Receiver, out beam.Sender) {
for {
msg, err := in.Receive(beam.Ret)
if err != nil {
fmt.Printf("debug receive: %v", err)
return
}
fmt.Printf("[DEBUG] %s %s\n", msg.Verb, strings.Join(msg.Args, " "))
if _, err := out.Send(msg); err != nil {
fmt.Printf("debug send: %v", err)
return
}
}
})
_, err := ctx.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: instance})
return err
}))
return backend
}
// Spawn will return a new instance as the Ret channel of the message sent back
func (dbg *debug) spawn(msg *beam.Message) (err error) {
// By sending back a task, beam will run the function with the in and out arguments
// set to the services present before and after this one in the pipeline.
instance := beam.Task(func(in beam.Receiver, out beam.Sender) {
// Setup our channels
dbg.in = in
dbg.out = out
// Set up the debug interceptor
dbg.service.Catchall(beam.Handler(dbg.catchall))
// Copy everything from the receiver to our service. By copying like this in the task
// we can use the catchall handler instead of handling the message here.
beam.Copy(dbg.service, in)
})
// Inform the system of our new instance
msg.Ret.Send(&beam.Message{
Verb: beam.Ack,
Ret: instance,
})
return
}
func Exec() beam.Sender {
e := beam.NewServer()
e.OnSpawn(beam.Handler(func(msg *beam.Message) error {
if len(msg.Args) < 1 {
return fmt.Errorf("usage: SPAWN exec|... <config>")
}
if msg.Args[0] != "exec" {
return fmt.Errorf("invalid command: %s", msg.Args[0])
}
var config struct {
Path string
Args []string
}
if err := json.Unmarshal([]byte(msg.Args[1]), &config); err != nil {
config.Path = msg.Args[1]
config.Args = msg.Args[2:]
}
cmd := &command{
Cmd: exec.Command(config.Path, config.Args...),
Server: beam.NewServer(),
}
cmd.OnAttach(beam.Handler(func(msg *beam.Message) error {
stdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
stdin, err := cmd.StdinPipe()
if err != nil {
return err
}
inR, inW := beam.Pipe()
if _, err := msg.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: inW}); err != nil {
return err
}
out := beam.Obj(msg.Ret)
go func() {
defer stdin.Close()
for {
msg, err := inR.Receive(0)
if err != nil {
return
}
if msg.Verb == beam.Log && len(msg.Args) > 0 {
fmt.Fprintf(stdin, "%s\n", strings.TrimRight(msg.Args[0], "\r\n"))
}
}
}()
cmd.tasks.Add(1)
go func() {
defer cmd.tasks.Done()
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
if scanner.Err() != io.EOF && scanner.Err() != nil {
return
}
if err := out.Log(scanner.Text()); err != nil {
out.Error("%v", err)
return
}
}
}()
cmd.tasks.Wait()
return nil
}))
cmd.OnStart(beam.Handler(func(msg *beam.Message) error {
cmd.tasks.Add(1)
if err := cmd.Cmd.Start(); err != nil {
return err
}
go func() {
defer cmd.tasks.Done()
if err := cmd.Cmd.Wait(); err != nil {
beam.Obj(msg.Ret).Log("%s exited status=%v", cmd.Cmd.Path, err)
}
}()
msg.Ret.Send(&beam.Message{Verb: beam.Ack})
return nil
}))
if _, err := msg.Ret.Send(&beam.Message{Verb: beam.Ack, Ret: cmd}); err != nil {
return err
}
return nil
}))
return e
}
