func main() {
var config Config
config.Backend.Type = "vxlan"
if backend := os.Getenv("BACKEND"); backend != "" {
config.Backend.Type = backend
}
config.Network = os.Getenv("NETWORK")
if config.Network == "" {
config.Network = "100.100.0.0/16"
}
flag.StringVar(&config.SubnetMin, "subnet-min", "", "container network min subnet")
flag.StringVar(&config.SubnetMax, "subnet-max", "", "container network max subnet")
flag.UintVar(&config.SubnetLen, "subnet-len", 0, "container network subnet length")
flag.UintVar(&config.Backend.VNI, "vni", 0, "vxlan network identifier")
flag.UintVar(&config.Backend.Port, "port", 0, "vxlan communication port (UDP)")
flag.Parse()
// wait for discoverd to come up
status, err := cluster.WaitForHostStatus(os.Getenv("EXTERNAL_IP"), func(status *host.HostStatus) bool {
return status.Discoverd != nil && status.Discoverd.URL != ""
})
if err != nil {
log.Fatal(err)
}
// create service and config if not present
client := discoverd.NewClientWithURL(status.Discoverd.URL)
if err := client.AddService(serviceName, nil); err != nil && !hh.IsObjectExistsError(err) {
log.Fatalf("error creating discoverd service: %s", err)
}
data, err := json.Marshal(map[string]Config{"config": config})
if err != nil {
log.Fatal(err)
}
err = client.Service(serviceName).SetMeta(&discoverd.ServiceMeta{Data: data})
if err != nil && !hh.IsObjectExistsError(err) {
log.Fatalf("error creating discoverd service metadata: %s", err)
}
flanneld, err := exec.LookPath("flanneld")
if err != nil {
log.Fatal(err)
}
if err := syscall.Exec(
flanneld,
[]string{
flanneld,
"-discoverd-url=" + status.Discoverd.URL,
"-iface=" + os.Getenv("EXTERNAL_IP"),
"-http-port=" + os.Getenv("PORT"),
fmt.Sprintf("-notify-url=http://%s:1113/host/network", os.Getenv("EXTERNAL_IP")),
},
os.Environ(),
); err != nil {
log.Fatal(err)
}
}
func (s *EtcdSuite) TestSetMeta(c *C) {
events := make(chan *discoverd.Event, 1)
s.state.Subscribe("a", false, discoverd.EventKindServiceMeta, events)
c.Assert(s.backend.AddService("a", nil), IsNil)
c.Assert(s.backend.StartSync(), IsNil)
// with service that doesn't exist
err := s.backend.SetServiceMeta("b", &discoverd.ServiceMeta{Data: []byte("foo")})
c.Assert(err, FitsTypeOf, NotFoundError{})
// new with wrong index
err = s.backend.SetServiceMeta("a", &discoverd.ServiceMeta{Data: []byte("foo"), Index: 1})
c.Assert(hh.IsPreconditionFailedError(err), Equals, true)
// new
meta := &discoverd.ServiceMeta{Data: []byte("foo"), Index: 0}
c.Assert(s.backend.SetServiceMeta("a", meta), IsNil)
assertMetaEvent(c, events, "a", meta)
// index=0 set with existing
err = s.backend.SetServiceMeta("a", &discoverd.ServiceMeta{Data: []byte("foo"), Index: 0})
c.Assert(hh.IsObjectExistsError(err), Equals, true)
// set with existing, valid index
meta.Data = []byte("bar")
c.Assert(s.backend.SetServiceMeta("a", meta), IsNil)
assertMetaEvent(c, events, "a", meta)
// set with existing, low index
meta.Index--
meta.Data = []byte("baz")
err = s.backend.SetServiceMeta("a", meta)
c.Assert(hh.IsPreconditionFailedError(err), Equals, true)
}
func (c *Client) maybeAddService(service string) error {
err := c.AddService(service, nil)
if hh.IsObjectExistsError(err) {
return nil
}
return err
}
// Run executes the program.
func (m *Main) Run() error {
m.Logger.Info("running")
// Read or generate the instance identifier from file.
id, err := m.readID(filepath.Join(m.DataDir, "instance_id"))
if err != nil {
return err
}
m.Process.ID = id
m.Process.DataDir = m.DataDir
m.Process.Logger = m.Logger.New("component", "process", "id", id)
// Start process.
m.Logger.Info("starting process", "id", id)
if err := m.Process.Start(); err != nil {
m.Logger.Error("error starting process", "err", err)
return err
}
// Add service to discoverd registry.
m.Logger.Info("adding service", "name", m.ServiceName)
if err = m.DiscoverdClient.AddService(m.ServiceName, nil); err != nil && !httphelper.IsObjectExistsError(err) {
m.Logger.Error("error adding discoverd service", "err", err)
return err
}
inst := &discoverd.Instance{
Addr: ":" + m.Process.Port,
Meta: map[string]string{"REDIS_ID": id},
}
// Register instance and retain heartbeater.
m.Logger.Info("registering instance", "addr", inst.Addr, "meta", inst.Meta)
hb, err := m.DiscoverdClient.RegisterInstance(m.ServiceName, inst)
if err != nil {
m.Logger.Error("error registering discoverd instance", "err", err)
return err
}
m.hb = hb
shutdown.BeforeExit(func() { hb.Close() })
m.Logger.Info("opening port", "addr", m.Addr)
// Open HTTP port.
ln, err := net.Listen("tcp", m.Addr)
if err != nil {
m.Logger.Error("error opening port", "err", err)
return err
}
m.ln = ln
// Initialize and server handler.
m.Logger.Info("serving http api")
h := redis.NewHandler()
h.Process = m.Process
h.Heartbeater = m.hb
h.Logger = m.Logger.New("component", "http")
go func() { http.Serve(ln, h) }()
return nil
}
func main() {
serviceName := os.Getenv("FLYNN_POSTGRES")
if serviceName == "" {
serviceName = "postgres"
}
singleton := os.Getenv("SINGLETON") == "true"
password := os.Getenv("PGPASSWORD")
const dataDir = "/data"
idFile := filepath.Join(dataDir, "instance_id")
idBytes, err := ioutil.ReadFile(idFile)
if err != nil && !os.IsNotExist(err) {
shutdown.Fatalf("error reading instance ID: %s", err)
}
id := string(idBytes)
if len(id) == 0 {
id = random.UUID()
if err := ioutil.WriteFile(idFile, []byte(id), 0644); err != nil {
shutdown.Fatalf("error writing instance ID: %s", err)
}
}
err = discoverd.DefaultClient.AddService(serviceName, &discoverd.ServiceConfig{
LeaderType: discoverd.LeaderTypeManual,
})
if err != nil && !httphelper.IsObjectExistsError(err) {
shutdown.Fatal(err)
}
inst := &discoverd.Instance{
Addr: ":5432",
Meta: map[string]string{pgIdKey: id},
}
hb, err := discoverd.DefaultClient.RegisterInstance(serviceName, inst)
if err != nil {
shutdown.Fatal(err)
}
shutdown.BeforeExit(func() { hb.Close() })
log := log15.New("app", "postgres")
pg := NewPostgres(Config{
ID: id,
Singleton: singleton,
DataDir: filepath.Join(dataDir, "db"),
BinDir: "/usr/lib/postgresql/9.5/bin/",
Password: password,
Logger: log.New("component", "postgres"),
ExtWhitelist: true,
WaitUpstream: true,
SHMType: "posix",
})
dd := sd.NewDiscoverd(discoverd.DefaultClient.Service(serviceName), log.New("component", "discoverd"))
peer := state.NewPeer(inst, id, pgIdKey, singleton, dd, pg, log.New("component", "peer"))
shutdown.BeforeExit(func() { peer.Close() })
go peer.Run()
shutdown.Fatal(ServeHTTP(pg.(*Postgres), peer, hb, log.New("component", "http")))
// TODO(titanous): clean shutdown of postgres
}
func (c *Client) maybeAddService(service string) error {
if err := c.AddService(service, nil); err != nil {
if !hh.IsObjectExistsError(err) {
return err
}
}
return nil
}
func (c *Client) AddService(name string, conf *ServiceConfig) error {
if conf == nil {
conf = &ServiceConfig{}
}
if conf.LeaderType == "" {
conf.LeaderType = LeaderTypeOldest
}
return runAttempts.RunWithValidator(func() error {
return c.Put("/services/"+name, conf, nil)
}, func(err error) bool {
// TODO(titanous): fix Retry error field to be correct for discoverd
return !hh.IsObjectExistsError(err)
})
}
func main() {
serviceName := os.Getenv("FLYNN_POSTGRES")
if serviceName == "" {
serviceName = "postgres"
}
singleton := os.Getenv("SINGLETON") == "true"
password := os.Getenv("PGPASSWORD")
err := discoverd.DefaultClient.AddService(serviceName, &discoverd.ServiceConfig{
LeaderType: discoverd.LeaderTypeManual,
})
if err != nil && !httphelper.IsObjectExistsError(err) {
shutdown.Fatal(err)
}
inst := &discoverd.Instance{Addr: ":5432"}
hb, err := discoverd.DefaultClient.RegisterInstance(serviceName, inst)
if err != nil {
shutdown.Fatal(err)
}
shutdown.BeforeExit(func() { hb.Close() })
log := log15.New("app", "postgres")
pg := NewPostgres(Config{
ID: inst.ID,
Singleton: singleton,
BinDir: "/usr/lib/postgresql/9.4/bin/",
Password: password,
Logger: log.New("component", "postgres"),
ExtWhitelist: true,
WaitUpstream: true,
// TODO(titanous) investigate this:
SHMType: "sysv", // the default on 9.4, 'posix' is not currently supported in our containers
})
dd := NewDiscoverd(discoverd.DefaultClient.Service(serviceName), log.New("component", "discoverd"))
peer := state.NewPeer(inst, singleton, dd, pg, log.New("component", "peer"))
shutdown.BeforeExit(func() { peer.Close() })
go peer.Run()
shutdown.Fatal(ServeHTTP(pg.(*Postgres), peer, hb, log.New("component", "http")))
// TODO(titanous): clean shutdown of postgres
}
func monitor(port host.Port, container *ContainerInit, env map[string]string, log log15.Logger) (discoverd.Heartbeater, error) {
config := port.Service
client := discoverd.NewClientWithURL(env["DISCOVERD"])
client.Logger = logger.New("component", "discoverd")
if config.Create {
// TODO: maybe reuse maybeAddService() from the client
log.Info("creating service")
if err := client.AddService(config.Name, nil); err != nil {
if !hh.IsObjectExistsError(err) {
log.Error("error creating service", "err", err)
return nil, fmt.Errorf("something went wrong with discoverd: %s", err)
}
}
}
inst := &discoverd.Instance{
Addr: fmt.Sprintf("%s:%v", env["EXTERNAL_IP"], port.Port),
Proto: port.Proto,
}
// add discoverd.EnvInstanceMeta if present
for k, v := range env {
if _, ok := discoverd.EnvInstanceMeta[k]; !ok {
continue
}
if inst.Meta == nil {
inst.Meta = make(map[string]string)
}
inst.Meta[k] = v
}
// no checker, but we still want to register a service
if config.Check == nil {
log.Info("registering instance", "instance", inst)
return client.RegisterInstance(config.Name, inst)
}
var check health.Check
switch config.Check.Type {
case "tcp":
check = &health.TCPCheck{Addr: inst.Addr}
case "http", "https":
check = &health.HTTPCheck{
URL: fmt.Sprintf("%s://%s%s", config.Check.Type, inst.Addr, config.Check.Path),
Host: config.Check.Host,
StatusCode: config.Check.Status,
MatchBytes: []byte(config.Check.Match),
}
default:
// unsupported checker type
return nil, fmt.Errorf("unsupported check type: %s", config.Check.Type)
}
log.Info("adding healthcheck", "type", config.Check.Type, "interval", config.Check.Interval, "threshold", config.Check.Threshold)
reg := health.Registration{
Registrar: client,
Service: config.Name,
Instance: inst,
Monitor: health.Monitor{
Interval: config.Check.Interval,
Threshold: config.Check.Threshold,
Logger: log.New("component", "monitor"),
}.Run,
Check: check,
Logger: log,
}
if config.Check.KillDown {
reg.Events = make(chan health.MonitorEvent)
go func() {
if config.Check.StartTimeout == 0 {
config.Check.StartTimeout = 10 * time.Second
}
start := false
lastStatus := health.MonitorStatusDown
var mtx sync.Mutex
maybeKill := func() {
if lastStatus == health.MonitorStatusDown {
log.Warn("killing the job")
container.Signal(int(syscall.SIGKILL), &struct{}{})
}
}
go func() {
// ignore events for the first StartTimeout interval
<-time.After(config.Check.StartTimeout)
mtx.Lock()
defer mtx.Unlock()
maybeKill() // check if the app is down
start = true
}()
for e := range reg.Events {
log.Info("got health monitor event", "status", e.Status)
mtx.Lock()
lastStatus = e.Status
if !start {
mtx.Unlock()
continue
}
maybeKill()
mtx.Unlock()
}
}()
}
return reg.Register(), nil
}
func main() {
serviceName := os.Getenv("FLYNN_MONGO")
if serviceName == "" {
serviceName = "mongodb"
}
singleton := os.Getenv("SINGLETON") == "true"
password := os.Getenv("MONGO_PWD")
httpPort := os.Getenv("HTTP_PORT")
ip := os.Getenv("EXTERNAL_IP")
if httpPort == "" {
httpPort = "27018"
}
serverId := ipToId(net.ParseIP(ip))
const dataDir = "/data"
idFile := filepath.Join(dataDir, "instance_id")
idBytes, err := ioutil.ReadFile(idFile)
if err != nil && !os.IsNotExist(err) {
shutdown.Fatalf("error reading instance ID: %s", err)
}
id := string(idBytes)
if len(id) == 0 {
id = random.UUID()
if err := ioutil.WriteFile(idFile, []byte(id), 0644); err != nil {
shutdown.Fatalf("error writing instance ID: %s", err)
}
}
keyFile := filepath.Join(dataDir, "Keyfile")
if err := ioutil.WriteFile(keyFile, []byte(password), 0600); err != nil {
shutdown.Fatalf("error writing keyfile: %s", err)
}
err = discoverd.DefaultClient.AddService(serviceName, &discoverd.ServiceConfig{
LeaderType: discoverd.LeaderTypeManual,
})
if err != nil && !httphelper.IsObjectExistsError(err) {
shutdown.Fatal(err)
}
inst := &discoverd.Instance{
Addr: ":" + mongodb.DefaultPort,
Meta: map[string]string{mongoIdKey: id},
}
hb, err := discoverd.DefaultClient.RegisterInstance(serviceName, inst)
if err != nil {
shutdown.Fatal(err)
}
shutdown.BeforeExit(func() { hb.Close() })
log := log15.New("app", "mongodb")
process := mongodb.NewProcess()
process.Password = password
process.Singleton = singleton
process.ServerID = serverId
process.Host = ip
dd := sd.NewDiscoverd(discoverd.DefaultClient.Service(serviceName), log.New("component", "discoverd"))
peer := state.NewPeer(inst, id, mongoIdKey, singleton, dd, process, log.New("component", "peer"))
shutdown.BeforeExit(func() { peer.Close() })
go peer.Run()
handler := mongodb.NewHandler()
handler.Process = process
handler.Peer = peer
handler.Heartbeater = hb
handler.Logger = log.New("component", "http")
shutdown.Fatal(http.ListenAndServe(":"+httpPort, handler))
}