diff --git a/registry/handler/handler.go b/registry/handler/handler.go index f86148cd..a592dffa 100644 --- a/registry/handler/handler.go +++ b/registry/handler/handler.go @@ -2,6 +2,7 @@ package handler import ( "context" + "time" "github.com/micro/go-micro/errors" "github.com/micro/go-micro/registry" @@ -26,10 +27,17 @@ func (r *Registry) GetService(ctx context.Context, req *pb.GetRequest, rsp *pb.G } func (r *Registry) Register(ctx context.Context, req *pb.Service, rsp *pb.EmptyResponse) error { - err := r.Registry.Register(service.ToService(req)) + var regOpts []registry.RegisterOption + if req.Options != nil { + ttl := time.Duration(req.Options.Ttl) * time.Second + regOpts = append(regOpts, registry.RegisterTTL(ttl)) + } + + err := r.Registry.Register(service.ToService(req), regOpts...) if err != nil { return errors.InternalServerError("go.micro.registry", err.Error()) } + return nil } diff --git a/registry/memory/memory.go b/registry/memory/memory.go index 446aa0f0..810d8d4c 100644 --- a/registry/memory/memory.go +++ b/registry/memory/memory.go @@ -3,22 +3,33 @@ package memory import ( "context" + "strings" "sync" "time" "github.com/google/uuid" "github.com/micro/go-micro/registry" + "github.com/micro/go-micro/util/log" ) var ( - timeout = time.Millisecond * 10 + sendEventTime = 10 * time.Millisecond + ttlPruneTime = 1 * time.Minute + DefaultTTL = 1 * time.Minute ) +// node tracks node registration timestamp and TTL +type node struct { + lastSeen time.Time + ttl time.Duration +} + type Registry struct { options registry.Options sync.RWMutex Services map[string][]*registry.Service + nodes map[string]*node Watchers map[string]*Watcher } @@ -36,11 +47,67 @@ func NewRegistry(opts ...registry.Option) registry.Registry { services = make(map[string][]*registry.Service) } - return &Registry{ + reg := &Registry{ options: options, Services: services, + nodes: make(map[string]*node), Watchers: make(map[string]*Watcher), } + + go reg.ttlPrune() + + return reg +} + +// nodeTrackId returns a string we use to track a node of a given service +func nodeTrackId(svcName, svcVersion, nodeId string) string { + return svcName + "+" + svcVersion + "+" + nodeId +} + +func (m *Registry) ttlPrune() { + prune := time.NewTicker(ttlPruneTime) + defer prune.Stop() + + for { + select { + case <-prune.C: + m.Lock() + for nodeTrackId, node := range m.nodes { + // if the TTL has been set and we exceed the hresholdset by it we stop tracking the node + if node.ttl.Seconds() != 0.0 && time.Since(node.lastSeen) > node.ttl { + // split nodeTrackID into service Name, Version and Node Id + trackIdSplit := strings.Split(nodeTrackId, "+") + svcName, svcVersion, nodeId := trackIdSplit[0], trackIdSplit[1], trackIdSplit[2] + log.Debugf("Registry TTL expired for service %s, node %s", svcName, nodeId) + // we need to find a node that expired and delete it from service nodes + if _, ok := m.Services[svcName]; ok { + for _, service := range m.Services[svcName] { + if service.Version != svcVersion { + continue + } + // find expired service node and delete it + var nodes []*registry.Node + for _, n := range service.Nodes { + var del bool + if n.Id == nodeId { + del = true + } + if !del { + nodes = append(nodes, n) + } + } + service.Nodes = nodes + } + } + // stop tracking the node + delete(m.nodes, nodeTrackId) + } + } + m.Unlock() + } + } + + return } func (m *Registry) sendEvent(r *registry.Result) { @@ -61,7 +128,7 @@ func (m *Registry) sendEvent(r *registry.Result) { default: select { case w.res <- r: - case <-time.After(timeout): + case <-time.After(sendEventTime): } } } @@ -111,34 +178,76 @@ func (m *Registry) Register(s *registry.Service, opts ...registry.RegisterOption m.Lock() defer m.Unlock() + log.Debugf("Registry deregistering service: %s", s.Name) + + var options registry.RegisterOptions + for _, o := range opts { + o(&options) + } + if service, ok := m.Services[s.Name]; !ok { m.Services[s.Name] = []*registry.Service{s} + // add all nodes into nodes map to track their TTL + for _, n := range s.Nodes { + log.Debugf("Registry tracking new service: %s, node %s", s.Name, n.Id) + m.nodes[nodeTrackId(s.Name, s.Version, n.Id)] = &node{ + lastSeen: time.Now(), + ttl: options.TTL, + } + } go m.sendEvent(®istry.Result{Action: "update", Service: s}) + return nil } else { - svcCount := len(service) - svcNodeCounts := make(map[string]map[string]int) + // svcCount keeps the count of all versions of particular service + //svcCount := len(service) + // svcNodes maintains a list of node Ids per particular service version + svcNodes := make(map[string]map[string][]string) + // collect all service ids for all service versions for _, s := range service { - if _, ok := svcNodeCounts[s.Name]; !ok { - svcNodeCounts[s.Name] = make(map[string]int) + if _, ok := svcNodes[s.Name]; !ok { + svcNodes[s.Name] = make(map[string][]string) } - if _, ok := svcNodeCounts[s.Name][s.Version]; !ok { - svcNodeCounts[s.Name][s.Version] = len(s.Nodes) + if _, ok := svcNodes[s.Name][s.Version]; !ok { + for _, n := range s.Nodes { + svcNodes[s.Name][s.Version] = append(svcNodes[s.Name][s.Version], n.Id) + } } } - // if merged count and original service counts changed we added new version of the service + // if merged count and original service counts changed we know we are adding a new version of the service merged := registry.Merge(service, []*registry.Service{s}) - if len(merged) != svcCount { - m.Services[s.Name] = merged - go m.sendEvent(®istry.Result{Action: "update", Service: s}) - return nil - } - // if the node count for a particular service has changed we added a new node to the service + // if the node count of any service [version] changed we know we are adding a new node to the service for _, s := range merged { - if len(s.Nodes) != svcNodeCounts[s.Name][s.Version] { + // we know that if the node counts have changed we need to track new nodes + if len(s.Nodes) != len(svcNodes[s.Name][s.Version]) { + for _, n := range s.Nodes { + var found bool + for _, id := range svcNodes[s.Name][s.Version] { + if n.Id == id { + found = true + break + } + } + if !found { + log.Debugf("Registry tracking new node: %s for service %s", n.Id, s.Name) + m.nodes[nodeTrackId(s.Name, s.Version, n.Id)] = &node{ + lastSeen: time.Now(), + ttl: options.TTL, + } + } + } m.Services[s.Name] = merged go m.sendEvent(®istry.Result{Action: "update", Service: s}) return nil } + // refresh the timestamp and TTL of the service node + for _, n := range s.Nodes { + trackId := nodeTrackId(s.Name, s.Version, n.Id) + log.Debugf("Registry refreshing TTL for node %s for service %s", n.Id, s.Name) + if trackedNode, ok := m.nodes[trackId]; ok { + trackedNode.lastSeen = time.Now() + trackedNode.ttl = options.TTL + } + } } } @@ -149,12 +258,51 @@ func (m *Registry) Deregister(s *registry.Service) error { m.Lock() defer m.Unlock() + log.Debugf("Registry deregistering service: %s", s.Name) + if service, ok := m.Services[s.Name]; ok { - go m.sendEvent(®istry.Result{Action: "delete", Service: s}) - if service := registry.Remove(service, []*registry.Service{s}); len(service) == 0 { + // svcNodes collects the list of all node Ids for each service version + svcNodes := make(map[string]map[string][]string) + // collect all service node ids for all service versions + for _, svc := range service { + if _, ok := svcNodes[svc.Name]; !ok { + svcNodes[svc.Name] = make(map[string][]string) + } + if _, ok := svcNodes[svc.Name][svc.Version]; !ok { + for _, n := range svc.Nodes { + svcNodes[svc.Name][svc.Version] = append(svcNodes[svc.Name][svc.Version], n.Id) + } + } + } + // if there are no more services we know we have either removed all nodes or there were no nodes + if updatedService := registry.Remove(service, []*registry.Service{s}); len(updatedService) == 0 { + for _, id := range svcNodes[s.Name][s.Version] { + log.Debugf("Registry stopped tracking node %s for service %s", id, s.Name) + delete(m.nodes, nodeTrackId(s.Name, s.Version, id)) + go m.sendEvent(®istry.Result{Action: "delete", Service: s}) + } + log.Debugf("Registry deleting service %s: no service nodes", s.Name) delete(m.Services, s.Name) + return nil } else { - m.Services[s.Name] = service + // find out which nodes have been removed + for _, id := range svcNodes[s.Name][s.Version] { + for _, svc := range updatedService { + var found bool + for _, n := range svc.Nodes { + if id == n.Id { + found = true + break + } + } + if !found { + log.Debugf("Registry stopped tracking node %s for service %s", id, s.Name) + delete(m.nodes, nodeTrackId(s.Name, s.Version, id)) + go m.sendEvent(®istry.Result{Action: "delete", Service: s}) + } + } + m.Services[s.Name] = updatedService + } } } diff --git a/registry/proto/registry.pb.go b/registry/proto/registry.pb.go index 9c62a1fb..c6862d59 100644 --- a/registry/proto/registry.pb.go +++ b/registry/proto/registry.pb.go @@ -56,6 +56,7 @@ type Service struct { Metadata map[string]string `protobuf:"bytes,3,rep,name=metadata,proto3" json:"metadata,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"` Endpoints []*Endpoint `protobuf:"bytes,4,rep,name=endpoints,proto3" json:"endpoints,omitempty"` Nodes []*Node `protobuf:"bytes,5,rep,name=nodes,proto3" json:"nodes,omitempty"` + Options *Options `protobuf:"bytes,6,opt,name=options,proto3" json:"options,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` @@ -121,6 +122,13 @@ func (m *Service) GetNodes() []*Node { return nil } +func (m *Service) GetOptions() *Options { + if m != nil { + return m.Options + } + return nil +} + // Node represents the node the service is on type Node struct { Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"` @@ -305,6 +313,46 @@ func (m *Value) GetValues() []*Value { return nil } +// Options are registry options +type Options struct { + Ttl int64 `protobuf:"varint,1,opt,name=ttl,proto3" json:"ttl,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Options) Reset() { *m = Options{} } +func (m *Options) String() string { return proto.CompactTextString(m) } +func (*Options) ProtoMessage() {} +func (*Options) Descriptor() ([]byte, []int) { + return fileDescriptor_41af05d40a615591, []int{4} +} + +func (m *Options) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Options.Unmarshal(m, b) +} +func (m *Options) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Options.Marshal(b, m, deterministic) +} +func (m *Options) XXX_Merge(src proto.Message) { + xxx_messageInfo_Options.Merge(m, src) +} +func (m *Options) XXX_Size() int { + return xxx_messageInfo_Options.Size(m) +} +func (m *Options) XXX_DiscardUnknown() { + xxx_messageInfo_Options.DiscardUnknown(m) +} + +var xxx_messageInfo_Options proto.InternalMessageInfo + +func (m *Options) GetTtl() int64 { + if m != nil { + return m.Ttl + } + return 0 +} + // Result is returns by the watcher type Result struct { Action string `protobuf:"bytes,1,opt,name=action,proto3" json:"action,omitempty"` @@ -319,7 +367,7 @@ func (m *Result) Reset() { *m = Result{} } func (m *Result) String() string { return proto.CompactTextString(m) } func (*Result) ProtoMessage() {} func (*Result) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{4} + return fileDescriptor_41af05d40a615591, []int{5} } func (m *Result) XXX_Unmarshal(b []byte) error { @@ -371,7 +419,7 @@ func (m *EmptyResponse) Reset() { *m = EmptyResponse{} } func (m *EmptyResponse) String() string { return proto.CompactTextString(m) } func (*EmptyResponse) ProtoMessage() {} func (*EmptyResponse) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{5} + return fileDescriptor_41af05d40a615591, []int{6} } func (m *EmptyResponse) XXX_Unmarshal(b []byte) error { @@ -403,7 +451,7 @@ func (m *GetRequest) Reset() { *m = GetRequest{} } func (m *GetRequest) String() string { return proto.CompactTextString(m) } func (*GetRequest) ProtoMessage() {} func (*GetRequest) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{6} + return fileDescriptor_41af05d40a615591, []int{7} } func (m *GetRequest) XXX_Unmarshal(b []byte) error { @@ -442,7 +490,7 @@ func (m *GetResponse) Reset() { *m = GetResponse{} } func (m *GetResponse) String() string { return proto.CompactTextString(m) } func (*GetResponse) ProtoMessage() {} func (*GetResponse) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{7} + return fileDescriptor_41af05d40a615591, []int{8} } func (m *GetResponse) XXX_Unmarshal(b []byte) error { @@ -480,7 +528,7 @@ func (m *ListRequest) Reset() { *m = ListRequest{} } func (m *ListRequest) String() string { return proto.CompactTextString(m) } func (*ListRequest) ProtoMessage() {} func (*ListRequest) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{8} + return fileDescriptor_41af05d40a615591, []int{9} } func (m *ListRequest) XXX_Unmarshal(b []byte) error { @@ -512,7 +560,7 @@ func (m *ListResponse) Reset() { *m = ListResponse{} } func (m *ListResponse) String() string { return proto.CompactTextString(m) } func (*ListResponse) ProtoMessage() {} func (*ListResponse) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{9} + return fileDescriptor_41af05d40a615591, []int{10} } func (m *ListResponse) XXX_Unmarshal(b []byte) error { @@ -552,7 +600,7 @@ func (m *WatchRequest) Reset() { *m = WatchRequest{} } func (m *WatchRequest) String() string { return proto.CompactTextString(m) } func (*WatchRequest) ProtoMessage() {} func (*WatchRequest) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{10} + return fileDescriptor_41af05d40a615591, []int{11} } func (m *WatchRequest) XXX_Unmarshal(b []byte) error { @@ -599,7 +647,7 @@ func (m *Event) Reset() { *m = Event{} } func (m *Event) String() string { return proto.CompactTextString(m) } func (*Event) ProtoMessage() {} func (*Event) Descriptor() ([]byte, []int) { - return fileDescriptor_41af05d40a615591, []int{11} + return fileDescriptor_41af05d40a615591, []int{12} } func (m *Event) XXX_Unmarshal(b []byte) error { @@ -657,6 +705,7 @@ func init() { proto.RegisterType((*Endpoint)(nil), "go.micro.registry.Endpoint") proto.RegisterMapType((map[string]string)(nil), "go.micro.registry.Endpoint.MetadataEntry") proto.RegisterType((*Value)(nil), "go.micro.registry.Value") + proto.RegisterType((*Options)(nil), "go.micro.registry.Options") proto.RegisterType((*Result)(nil), "go.micro.registry.Result") proto.RegisterType((*EmptyResponse)(nil), "go.micro.registry.EmptyResponse") proto.RegisterType((*GetRequest)(nil), "go.micro.registry.GetRequest") @@ -670,45 +719,47 @@ func init() { func init() { 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0xae, 0xe0, 0xaa, + 0x05, 0x50, 0xbc, 0xe5, 0xb0, 0xb6, 0xe7, 0x7c, 0x6c, 0xea, 0xdf, 0xf4, 0xfd, 0x5f, 0x01, 0x00, + 0x00, 0xff, 0xff, 0xfb, 0x3e, 0x7d, 0xa4, 0xb8, 0x07, 0x00, 0x00, } diff --git a/registry/proto/registry.proto b/registry/proto/registry.proto index 6883102a..ddc09669 100644 --- a/registry/proto/registry.proto +++ b/registry/proto/registry.proto @@ -12,11 +12,12 @@ service Registry { // Service represents a go-micro service message Service { - string name = 1; - string version = 2; - map metadata = 3; - repeated Endpoint endpoints = 4; - repeated Node nodes = 5; + string name = 1; + string version = 2; + map metadata = 3; + repeated Endpoint endpoints = 4; + repeated Node nodes = 5; + Options options = 6; } // Node represents the node the service is on @@ -42,6 +43,11 @@ message Value { repeated Value values = 3; } +// Options are registry options +message Options { + int64 ttl = 1; +} + // Result is returns by the watcher message Result { string action = 1; // create, update, delete diff --git a/registry/service/service.go b/registry/service/service.go index 4af5ab40..5bc3cffb 100644 --- a/registry/service/service.go +++ b/registry/service/service.go @@ -58,8 +58,12 @@ func (s *serviceRegistry) Register(srv *registry.Service, opts ...registry.Regis o(&options) } + // encode srv into protobuf and pack Register TTL into it + pbSrv := ToProto(srv) + pbSrv.Options.Ttl = int64(options.TTL.Seconds()) + // register the service - _, err := s.client.Register(context.TODO(), ToProto(srv), s.callOpts()...) + _, err := s.client.Register(context.TODO(), pbSrv, s.callOpts()...) if err != nil { return err }