diff --git a/registry/gossip/README.md b/registry/gossip/README.md index fbf204f5..bfeca969 100644 --- a/registry/gossip/README.md +++ b/registry/gossip/README.md @@ -1,6 +1,6 @@ # Gossip Registry -Gossip is a zero dependency registry which uses hashicorp/memberlist to broadcast registry information +Gossip is a zero dependency registry which uses github.com/hashicorp/memberlist to broadcast registry information via the SWIM protocol. ## Usage @@ -20,5 +20,5 @@ On startup you'll see something like To join this gossip ring set the registry address using flag or env var ```bash -MICRO_REGISTRY_ADDRESS= 192.168.1.65:56390 +MICRO_REGISTRY_ADDRESS=192.168.1.65:56390 ``` diff --git a/registry/gossip/context.go b/registry/gossip/context.go new file mode 100644 index 00000000..fd2b37cb --- /dev/null +++ b/registry/gossip/context.go @@ -0,0 +1,17 @@ +package gossip + +import ( + "context" + + "github.com/micro/go-micro/registry" +) + +// setRegistryOption returns a function to setup a context with given value +func setRegistryOption(k, v interface{}) registry.Option { + return func(o *registry.Options) { + if o.Context == nil { + o.Context = context.Background() + } + o.Context = context.WithValue(o.Context, k, v) + } +} diff --git a/registry/gossip/gossip.go b/registry/gossip/gossip.go index 5a4a0c40..05cbc425 100644 --- a/registry/gossip/gossip.go +++ b/registry/gossip/gossip.go @@ -7,9 +7,11 @@ import ( "io/ioutil" "net" "os" + "os/signal" "strconv" "strings" "sync" + "syscall" "time" "github.com/golang/protobuf/proto" @@ -21,10 +23,35 @@ import ( "github.com/mitchellh/hashstructure" ) +// use registry.Result int32 values after it switches from string to int32 types +// type actionType int32 +// type updateType int32 + const ( - addAction = "update" - delAction = "delete" - syncAction = "sync" + actionTypeInvalid int32 = iota + actionTypeCreate + actionTypeDelete + actionTypeUpdate + actionTypeSync +) + +func actionTypeString(t int32) string { + switch t { + case actionTypeCreate: + return "create" + case actionTypeDelete: + return "delete" + case actionTypeUpdate: + return "update" + case actionTypeSync: + return "sync" + } + return "invalid" +} + +const ( + updateTypeInvalid int32 = iota + updateTypeService ) type broadcast struct { @@ -93,23 +120,18 @@ func configure(g *gossipRegistry, opts ...registry.Option) error { // shutdown old member if g.member != nil { - g.member.Shutdown() + g.Stop() } // replace addresses curAddrs = newAddrs - // create a queue - queue := &memberlist.TransmitLimitedQueue{ - NumNodes: func() int { - return len(curAddrs) - }, - RetransmitMult: 3, - } - // create a new default config c := memberlist.DefaultLocalConfig() + // log to dev null + c.LogOutput = ioutil.Discard + if optConfig, ok := g.options.Context.Value(contextConfig{}).(*memberlist.Config); ok && optConfig != nil { c = optConfig } @@ -145,15 +167,6 @@ func configure(g *gossipRegistry, opts ...registry.Option) error { // set the name c.Name = strings.Join([]string{"micro", hostname, uuid.New().String()}, "-") - // set the delegate - c.Delegate = &delegate{ - updates: g.updates, - queue: queue, - } - - // log to dev null - c.LogOutput = ioutil.Discard - // set a secret key if secure if g.options.Secure { k, ok := g.options.Context.Value(contextSecretKey{}).([]byte) @@ -164,6 +177,20 @@ func configure(g *gossipRegistry, opts ...registry.Option) error { c.SecretKey = k } + // create a queue + queue := &memberlist.TransmitLimitedQueue{ + NumNodes: func() int { + return len(curAddrs) + }, + RetransmitMult: 3, + } + + // set the delegate + c.Delegate = &delegate{ + updates: g.updates, + queue: queue, + } + // create the memberlist m, err := memberlist.Create(c) if err != nil { @@ -187,29 +214,10 @@ func configure(g *gossipRegistry, opts ...registry.Option) error { return nil } +func (*broadcast) UniqueBroadcast() {} + func (b *broadcast) Invalidates(other memberlist.Broadcast) bool { - up := new(pb.Update) - if err := proto.Unmarshal(other.Message(), up); err != nil { - return false - } - - // ids do not match - if b.update.Id == up.Id { - return false - } - - // timestamps do not match - if b.update.Timestamp != up.Timestamp { - return false - } - - // type does not match - if b.update.Type != up.Type { - return false - } - - // invalidates - return true + return false } func (b *broadcast) Message() []byte { @@ -242,7 +250,7 @@ func (d *delegate) NotifyMsg(b []byte) { } // only process service action - if up.Type != "service" { + if up.Type != updateTypeService { return } @@ -280,7 +288,7 @@ func (d *delegate) LocalState(join bool) []byte { d.updates <- &update{ Update: &pb.Update{ - Action: syncAction, + Action: actionTypeSync, }, sync: syncCh, } @@ -309,7 +317,7 @@ func (d *delegate) MergeRemoteState(buf []byte, join bool) { for _, service := range services { for _, srv := range service { d.updates <- &update{ - Update: &pb.Update{Action: addAction}, + Update: &pb.Update{Action: actionTypeCreate}, Service: srv, sync: nil, } @@ -350,6 +358,31 @@ func (g *gossipRegistry) subscribe() (chan *registry.Result, chan bool) { return next, exit } +func (g *gossipRegistry) wait() { + ctx := g.options.Context + + if c, ok := ctx.Value(contextContext{}).(context.Context); ok && c != nil { + ctx = c + } + + ch := make(chan os.Signal, 1) + signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT) + + select { + // wait on kill signal + case <-ch: + // wait on context cancel + case <-ctx.Done(): + } + + g.Stop() +} + +func (g *gossipRegistry) Stop() { + g.member.Leave(g.interval * 2) + g.member.Shutdown() +} + func (g *gossipRegistry) run() { var mtx sync.Mutex updates := map[uint64]*update{} @@ -367,11 +400,11 @@ func (g *gossipRegistry) run() { // process all the updates for k, v := range updates { // check if expiry time has passed - if d := (v.Update.Timestamp + v.Update.Expires); d < now { + if d := (v.Update.Expires); d < now { // delete from records delete(updates, k) // set to delete - v.Update.Action = delAction + v.Update.Action = actionTypeDelete // fire a new update g.updates <- v } @@ -384,7 +417,7 @@ func (g *gossipRegistry) run() { // process the updates for u := range g.updates { switch u.Update.Action { - case addAction: + case actionTypeCreate: g.Lock() if service, ok := g.services[u.Service.Name]; !ok { g.services[u.Service.Name] = []*registry.Service{u.Service} @@ -395,7 +428,7 @@ func (g *gossipRegistry) run() { g.Unlock() // publish update to watchers - go g.publish(addAction, []*registry.Service{u.Service}) + go g.publish(actionTypeString(actionTypeCreate), []*registry.Service{u.Service}) // we need to expire the node at some point in the future if u.Update.Expires > 0 { @@ -406,7 +439,7 @@ func (g *gossipRegistry) run() { mtx.Unlock() } } - case delAction: + case actionTypeDelete: g.Lock() if service, ok := g.services[u.Service.Name]; ok { if services := delServices(service, []*registry.Service{u.Service}); len(services) == 0 { @@ -418,7 +451,7 @@ func (g *gossipRegistry) run() { g.Unlock() // publish update to watchers - go g.publish(delAction, []*registry.Service{u.Service}) + go g.publish(actionTypeString(actionTypeDelete), []*registry.Service{u.Service}) // delete from expiry checks if hash, err := hashstructure.Hash(u.Service, nil); err == nil { @@ -426,7 +459,7 @@ func (g *gossipRegistry) run() { delete(updates, hash) mtx.Unlock() } - case syncAction: + case actionTypeSync: // no sync channel provided if u.sync == nil { continue @@ -441,7 +474,7 @@ func (g *gossipRegistry) run() { } // publish to watchers - go g.publish(addAction, service) + go g.publish(actionTypeString(actionTypeCreate), service) } g.RUnlock() @@ -480,11 +513,9 @@ func (g *gossipRegistry) Register(s *registry.Service, opts ...registry.Register } up := &pb.Update{ - Id: uuid.New().String(), - Timestamp: uint64(time.Now().UnixNano()), - Expires: uint64(options.TTL.Nanoseconds()), - Action: "update", - Type: "service", + Expires: uint64(time.Now().Add(options.TTL).UnixNano()), + Action: actionTypeCreate, + Type: updateTypeService, Metadata: map[string]string{ "Content-Type": "application/json", }, @@ -519,10 +550,8 @@ func (g *gossipRegistry) Deregister(s *registry.Service) error { g.Unlock() up := &pb.Update{ - Id: uuid.New().String(), - Timestamp: uint64(time.Now().UnixNano()), - Action: "delete", - Type: "service", + Action: actionTypeDelete, + Type: updateTypeService, Metadata: map[string]string{ "Content-Type": "application/json", }, @@ -590,5 +619,7 @@ func NewRegistry(opts ...registry.Option) registry.Registry { // wait for setup <-time.After(gossip.interval * 2) + go gossip.wait() + return gossip } diff --git a/registry/gossip/gossip_test.go b/registry/gossip/gossip_test.go new file mode 100644 index 00000000..c8989f1f --- /dev/null +++ b/registry/gossip/gossip_test.go @@ -0,0 +1,199 @@ +package gossip_test + +import ( + "context" + "os" + "sync" + "testing" + "time" + + "github.com/google/uuid" + "github.com/hashicorp/memberlist" + micro "github.com/micro/go-micro" + "github.com/micro/go-micro/client" + "github.com/micro/go-micro/registry" + "github.com/micro/go-micro/registry/gossip" + pb "github.com/micro/go-micro/registry/gossip/proto" + "github.com/micro/go-micro/selector" + "github.com/micro/go-micro/server" +) + +var ( + r1 registry.Registry + r2 registry.Registry + mu sync.Mutex +) + +func newConfig() *memberlist.Config { + wc := memberlist.DefaultLANConfig() + wc.DisableTcpPings = false + wc.GossipVerifyIncoming = false + wc.GossipVerifyOutgoing = false + wc.EnableCompression = false + wc.LogOutput = os.Stderr + wc.ProtocolVersion = 4 + wc.Name = uuid.New().String() + return wc +} + +func newRegistries() { + mu.Lock() + defer mu.Unlock() + + if r1 != nil && r2 != nil { + return + } + + wc1 := newConfig() + wc2 := newConfig() + + rops1 := []registry.Option{gossip.Config(wc1), gossip.Address("127.0.0.1:54321")} + rops2 := []registry.Option{gossip.Config(wc2), gossip.Address("127.0.0.2:54321"), registry.Addrs("127.0.0.1:54321")} + + r1 = gossip.NewRegistry(rops1...) // first started without members + r2 = gossip.NewRegistry(rops2...) // second started joining +} + +func TestRegistryBroadcast(t *testing.T) { + newRegistries() + + svc1 := ®istry.Service{Name: "r1-svc", Version: "0.0.0.1"} + svc2 := ®istry.Service{Name: "r2-svc", Version: "0.0.0.2"} + + <-time.After(1 * time.Second) + if err := r1.Register(svc1); err != nil { + t.Fatal(err) + } + <-time.After(1 * time.Second) + if err := r2.Register(svc2); err != nil { + t.Fatal(err) + } + + var found bool + + svcs, err := r1.ListServices() + if err != nil { + t.Fatal(err) + } + + for _, svc := range svcs { + if svc.Name == "r2-svc" { + found = true + } + } + if !found { + t.Fatalf("r2-svc not found in r1, broadcast not work") + } + + found = false + svcs, err = r2.ListServices() + if err != nil { + t.Fatal(err) + } + + for _, svc := range svcs { + if svc.Name == "r1-svc" { + found = true + } + } + if !found { + t.Fatalf("r1-svc not found in r2, broadcast not work") + } + + if err := r1.Deregister(svc1); err != nil { + t.Fatal(err) + } + if err := r2.Deregister(svc2); err != nil { + t.Fatal(err) + } + +} + +func TestServerRegistry(t *testing.T) { + newRegistries() + + _, err := newServer("s1", r1, t) + if err != nil { + t.Fatal(err) + } + + _, err = newServer("s2", r2, t) + if err != nil { + t.Fatal(err) + } + + svcs, err := r1.ListServices() + if err != nil { + t.Fatal(err) + } + if len(svcs) < 1 { + t.Fatalf("r1 svcs unknown %#+v\n", svcs) + } + + found := false + for _, svc := range svcs { + if svc.Name == "s2" { + found = true + } + } + if !found { + t.Fatalf("r1 does not have s2, broadcast not work") + } + + found = false + svcs, err = r2.ListServices() + if err != nil { + t.Fatal(err) + } + + for _, svc := range svcs { + if svc.Name == "s1" { + found = true + } + } + + if !found { + t.Fatalf("r2 does not have s1, broadcast not work") + } + +} + +type testServer struct{} + +func (*testServer) Test(ctx context.Context, req *pb.Update, rsp *pb.Update) error { + return nil +} + +func newServer(n string, r registry.Registry, t *testing.T) (micro.Service, error) { + h := &testServer{} + + var wg sync.WaitGroup + + wg.Add(1) + sopts := []server.Option{ + server.Name(n), + server.Registry(r), + } + + copts := []client.Option{ + client.Selector(selector.NewSelector(selector.Registry(r))), + client.Registry(r), + } + + srv := micro.NewService( + micro.Server(server.NewServer(sopts...)), + micro.Client(client.NewClient(copts...)), + micro.AfterStart(func() error { + wg.Done() + return nil + }), + ) + + srv.Server().NewHandler(h) + + go func() { + t.Fatal(srv.Run()) + }() + wg.Wait() + return srv, nil +} diff --git a/registry/gossip/options.go b/registry/gossip/options.go index cee50ee5..3188ba7c 100644 --- a/registry/gossip/options.go +++ b/registry/gossip/options.go @@ -12,34 +12,35 @@ type contextSecretKey struct{} // Secret specifies an encryption key. The value should be either // 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256. func Secret(k []byte) registry.Option { - return func(o *registry.Options) { - o.Context = context.WithValue(o.Context, contextSecretKey{}, k) - } + return setRegistryOption(contextSecretKey{}, k) } type contextAddress struct{} // Address to bind to - host:port func Address(a string) registry.Option { - return func(o *registry.Options) { - o.Context = context.WithValue(o.Context, contextAddress{}, a) - } + return setRegistryOption(contextAddress{}, a) } type contextConfig struct{} // Config allow to inject a *memberlist.Config struct for configuring gossip func Config(c *memberlist.Config) registry.Option { - return func(o *registry.Options) { - o.Context = context.WithValue(o.Context, contextConfig{}, c) - } + return setRegistryOption(contextConfig{}, c) } type contextAdvertise struct{} // The address to advertise for other gossip members - host:port func Advertise(a string) registry.Option { - return func(o *registry.Options) { - o.Context = context.WithValue(o.Context, contextAdvertise{}, a) - } + return setRegistryOption(contextAdvertise{}, a) +} + +type contextContext struct{} + +// Context specifies a context for the registry. +// Can be used to signal shutdown of the registry. +// Can be used for extra option values. +func Context(ctx context.Context) registry.Option { + return setRegistryOption(contextContext{}, ctx) } diff --git a/registry/gossip/proto/gossip.pb.go b/registry/gossip/proto/gossip.pb.go index bc7c0700..e5d692fc 100644 --- a/registry/gossip/proto/gossip.pb.go +++ b/registry/gossip/proto/gossip.pb.go @@ -3,9 +3,12 @@ package gossip -import proto "github.com/golang/protobuf/proto" -import fmt "fmt" -import math "math" +import ( + fmt "fmt" + math "math" + + proto "github.com/golang/protobuf/proto" +) // Reference imports to suppress errors if they are not otherwise used. var _ = proto.Marshal @@ -20,16 +23,12 @@ const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package // Update is the message broadcast type Update struct { - // unique id of update - Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"` - // unix nano timestamp of update - Timestamp uint64 `protobuf:"varint,2,opt,name=timestamp,proto3" json:"timestamp,omitempty"` // time to live for entry - Expires uint64 `protobuf:"varint,3,opt,name=expires,proto3" json:"expires,omitempty"` - // type of update; service - Type string `protobuf:"bytes,4,opt,name=type,proto3" json:"type,omitempty"` - // what action is taken; add, del, put - Action string `protobuf:"bytes,5,opt,name=action,proto3" json:"action,omitempty"` + Expires uint64 `protobuf:"varint,1,opt,name=expires,proto3" json:"expires,omitempty"` + // type of update + Type int32 `protobuf:"varint,2,opt,name=type,proto3" json:"type,omitempty"` + // what action is taken + Action int32 `protobuf:"varint,3,opt,name=action,proto3" json:"action,omitempty"` // any other associated metadata about the data Metadata map[string]string `protobuf:"bytes,6,rep,name=metadata,proto3" json:"metadata,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"` // the payload data; @@ -43,16 +42,17 @@ func (m *Update) Reset() { *m = Update{} } func (m *Update) String() string { return proto.CompactTextString(m) } func (*Update) ProtoMessage() {} func (*Update) Descriptor() ([]byte, []int) { - return fileDescriptor_gossip_fd1eb378131a5d12, []int{0} + return fileDescriptor_18cba623e76e57f3, []int{0} } + func (m *Update) XXX_Unmarshal(b []byte) error { return xxx_messageInfo_Update.Unmarshal(m, b) } func (m *Update) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { return xxx_messageInfo_Update.Marshal(b, m, deterministic) } -func (dst *Update) XXX_Merge(src proto.Message) { - xxx_messageInfo_Update.Merge(dst, src) +func (m *Update) XXX_Merge(src proto.Message) { + xxx_messageInfo_Update.Merge(m, src) } func (m *Update) XXX_Size() int { return xxx_messageInfo_Update.Size(m) @@ -63,20 +63,6 @@ func (m *Update) XXX_DiscardUnknown() { var xxx_messageInfo_Update proto.InternalMessageInfo -func (m *Update) GetId() string { - if m != nil { - return m.Id - } - return "" -} - -func (m *Update) GetTimestamp() uint64 { - if m != nil { - return m.Timestamp - } - return 0 -} - func (m *Update) GetExpires() uint64 { if m != nil { return m.Expires @@ -84,18 +70,18 @@ func (m *Update) GetExpires() uint64 { return 0 } -func (m *Update) GetType() string { +func (m *Update) GetType() int32 { if m != nil { return m.Type } - return "" + return 0 } -func (m *Update) GetAction() string { +func (m *Update) GetAction() int32 { if m != nil { return m.Action } - return "" + return 0 } func (m *Update) GetMetadata() map[string]string { @@ -118,25 +104,24 @@ func init() { } func init() { - proto.RegisterFile("github.com/micro/go-micro/registry/gossip/proto/gossip.proto", fileDescriptor_gossip_fd1eb378131a5d12) + proto.RegisterFile("github.com/micro/go-micro/registry/gossip/proto/gossip.proto", fileDescriptor_18cba623e76e57f3) } -var fileDescriptor_gossip_fd1eb378131a5d12 = []byte{ - // 251 bytes of a gzipped FileDescriptorProto - 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x54, 0x90, 0xcf, 0x4a, 0xc4, 0x30, - 0x10, 0x87, 0x69, 0xb6, 0x9b, 0xb5, 0xe3, 0x1f, 0x64, 0x10, 0x09, 0xb2, 0x87, 0xe2, 0xa9, 0x17, - 0x5b, 0xd0, 0xcb, 0xa2, 0x5e, 0x3d, 0x7a, 0x09, 0xf8, 0x00, 0xd9, 0x36, 0xd4, 0xa0, 0xd9, 0x84, - 0x64, 0x56, 0xec, 0x13, 0xf8, 0xda, 0xb2, 0x69, 0x54, 0xbc, 0x7d, 0xdf, 0xcc, 0x24, 0x99, 0x5f, - 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// unique id of update - string id = 1; - // unix nano timestamp of update - uint64 timestamp = 2; // time to live for entry - uint64 expires = 3; - // type of update; service - string type = 4; - // what action is taken; add, del, put - string action = 5; + uint64 expires = 1; + // type of update + int32 type = 2; + // what action is taken + int32 action = 3; // any other associated metadata about the data map metadata = 6; // the payload data;