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Merge pull request #411 from unistack-org/gossip

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registry: gossip unify registry option passing, optimize
This commit is contained in:
Asim Aslam 2019-02-01 22:21:08 +00:00 committed by GitHub
commit 89014160fc
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 367 additions and 138 deletions
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4
registry/gossip/README.md
View File

@ -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
```

17
registry/gossip/context.go Normal file
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@ -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)
}
}

157
registry/gossip/gossip.go
View File

@ -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
}

199
registry/gossip/gossip_test.go Normal file
View File

@ -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 := &registry.Service{Name: "r1-svc", Version: "0.0.0.1"}
svc2 := &registry.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
}

25
registry/gossip/options.go
View File

@ -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)
}

89
registry/gossip/proto/gossip.pb.go
View File

@ -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
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var fileDescriptor_18cba623e76e57f3 = []byte{
// 227 bytes of a gzipped FileDescriptorProto
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0x90, 0x17, 0xbb, 0xfd, 0x61, 0xc0, 0xdf, 0xfc, 0x56, 0x91, 0x46, 0x01, 0x4b, 0xfd, 0xed, 0x6d,
0xd0, 0x51, 0xb0, 0x96, 0x75, 0x73, 0xf9, 0xa7, 0x88, 0x30, 0xa7, 0xe4, 0xb5, 0x98, 0xb5, 0xac,
0x5b, 0xc8, 0xcc, 0x78, 0x05, 0x5c, 0x8d, 0x64, 0xdd, 0x4e, 0x34, 0xf9, 0xb4, 0x1a, 0xae, 0xe1,
0x64, 0xd2, 0xa4, 0xb6, 0x8a, 0x94, 0xe0, 0x6d, 0xd3, 0x9d, 0xde, 0xdf, 0xf4, 0xb5, 0xb9, 0xf4,
0xf4, 0xaf, 0xf5, 0xfa, 0x65, 0x47, 0x21, 0xc9, 0xff, 0xf4, 0xa1, 0x25, 0xbf, 0x5a, 0xb6, 0xac,
0x3b, 0x93, 0x99, 0xaf, 0x9f, 0xe0, 0xfc, 0x28, 0x8e, 0x17, 0xd0, 0x7c, 0xe8, 0x94, 0x07, 0xae,
0xe4, 0x01, 0xf1, 0x12, 0x16, 0x5f, 0xea, 0x73, 0x5f, 0xd6, 0xad, 0x64, 0x91, 0xc7, 0xd9, 0x9a,
0x6d, 0x78, 0xfe, 0xea, 0xc3, 0x6f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xd6, 0x63, 0x7b, 0x1b, 0x2a,
0x01, 0x00, 0x00,
}

14
registry/gossip/proto/gossip.proto
View File

@ -4,16 +4,12 @@ package gossip;
// Update is the message broadcast
message Update {
// 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<string, string> metadata = 6;
// the payload data;