func (s *S) TestLeaderRouting(c *C) {
srv1 := httptest.NewServer(httpTestHandler("1"))
srv2 := httptest.NewServer(httpTestHandler("2"))
defer srv1.Close()
defer srv2.Close()
l := s.newHTTPListener(c)
defer l.Close()
client := l.discoverd
err := client.AddService("leader-routing-http", &discoverd.ServiceConfig{
LeaderType: discoverd.LeaderTypeManual,
})
c.Assert(err, IsNil)
addRoute(c, l, router.HTTPRoute{
Domain: "foo.bar",
Service: "leader-routing-http",
Leader: true,
}.ToRoute())
discoverdRegisterHTTPService(c, l, "leader-routing-http", srv1.Listener.Addr().String())
discoverdRegisterHTTPService(c, l, "leader-routing-http", srv2.Listener.Addr().String())
discoverdSetLeaderHTTP(c, l, "leader-routing-http", md5sum("tcp-"+srv1.Listener.Addr().String()))
assertGet(c, "http://"+l.Addr, "foo.bar", "1")
discoverdSetLeaderHTTP(c, l, "leader-routing-http", md5sum("tcp-"+srv2.Listener.Addr().String()))
c.Assert(err, IsNil)
assertGet(c, "http://"+l.Addr, "foo.bar", "2")
}
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 newTest(t *testing.T) (s *test) {
defer func() {
if t.Failed() {
s.cleanup()
t.FailNow()
}
}()
client, killDiscoverd := testutil.BootDiscoverd(t, "")
serviceName := "flannel-test"
if err := client.AddService(serviceName, nil); err != nil {
t.Errorf("error adding service: %s", err)
}
service := client.Service(serviceName)
events := make(chan *discoverd.Event)
stream, err := service.Watch(events)
if err != nil {
t.Errorf("error creating watch: %s", err)
}
data := []byte(`{"config":{"network": "10.3.0.0/16"}}`)
if err := service.SetMeta(&discoverd.ServiceMeta{Data: data}); err != nil {
t.Errorf("error setting meta: %s", err)
}
registry, err := NewRegistry(client, serviceName)
if err != nil {
t.Errorf("error creating registry: %s", err)
}
return &test{
T: t,
client: client,
service: service,
events: events,
registry: registry,
cleanup: func() {
stream.Close()
killDiscoverd()
},
}
}
func (s *S) TestTCPLeaderRouting(c *C) {
portInt := allocatePort()
port := strconv.Itoa(portInt)
addr := "127.0.0.1:" + port
srv1 := NewTCPTestServer("1")
srv2 := NewTCPTestServer("2")
defer srv1.Close()
defer srv2.Close()
l := s.newTCPListener(c)
defer l.Close()
client := l.discoverd
err := client.AddService("leader-routing-tcp", &discoverd.ServiceConfig{
LeaderType: discoverd.LeaderTypeManual,
})
c.Assert(err, IsNil)
wait := waitForEvent(c, l, "set", "")
r := router.TCPRoute{
Service: "leader-routing-tcp",
Port: portInt,
Leader: true,
}.ToRoute()
err = l.AddRoute(r)
c.Assert(err, IsNil)
wait()
discoverdRegisterTCPService(c, l, "leader-routing-tcp", srv1.Addr)
discoverdRegisterTCPService(c, l, "leader-routing-tcp", srv2.Addr)
discoverdSetLeaderTCP(c, l, "leader-routing-tcp", md5sum("tcp-"+srv1.Addr))
assertTCPConn(c, addr, "1")
discoverdSetLeaderTCP(c, l, "leader-routing-tcp", md5sum("tcp-"+srv2.Addr))
assertTCPConn(c, addr, "2")
}
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
}
