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etcddiscovery.go
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etcddiscovery.go
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package cluster
import (
"github.com/duanhf2012/origin/v2/event"
"github.com/duanhf2012/origin/v2/log"
"github.com/duanhf2012/origin/v2/rpc"
"github.com/duanhf2012/origin/v2/service"
"github.com/duanhf2012/origin/v2/util/timer"
"go.etcd.io/etcd/api/v3/mvccpb"
"go.etcd.io/etcd/client/v3"
"google.golang.org/protobuf/proto"
"time"
"context"
"errors"
"fmt"
"go.uber.org/zap"
"path"
"runtime"
"strings"
"sync/atomic"
)
const originDir = "/origin"
const testKey = originDir+"/_inner/_test_7501f3ed-b716-44c2-0090-fc1ed0166d7a"
type etcdClientInfo struct {
watchKeys []string
leaseID clientv3.LeaseID
keepAliveChan <-chan *clientv3.LeaseKeepAliveResponse
}
type EtcdDiscoveryService struct {
service.Service
funDelNode FunDelNode
funSetNode FunSetNode
localNodeId string
byteLocalNodeInfo string
mapClient map[*clientv3.Client]*etcdClientInfo
isClose int32
bRetire bool
mapDiscoveryNodeId map[string]map[string]struct{} //map[networkName]map[nodeId]
}
func getEtcdDiscovery() (IServiceDiscovery) {
etcdDiscovery := &EtcdDiscoveryService{}
return etcdDiscovery
}
func (ed *EtcdDiscoveryService) InitDiscovery(localNodeId string,funDelNode FunDelNode,funSetNode FunSetNode) error {
ed.localNodeId = localNodeId
ed.funDelNode = funDelNode
ed.funSetNode = funSetNode
return nil
}
const(
eeGets = 0
eePut = 1
eeDelete = 2
)
type etcdDiscoveryEvent struct {
typ int
watchKey string
Kvs []*mvccpb.KeyValue
}
func (ee *etcdDiscoveryEvent) GetEventType() event.EventType{
return event.Sys_Event_EtcdDiscovery
}
func (ed *EtcdDiscoveryService) OnInit() error {
ed.mapClient = make(map[*clientv3.Client]*etcdClientInfo,1)
ed.mapDiscoveryNodeId = make(map[string]map[string]struct{})
ed.GetEventProcessor().RegEventReceiverFunc(event.Sys_Event_EtcdDiscovery, ed.GetEventHandler(), ed.OnEtcdDiscovery)
err := ed.marshalNodeInfo()
if err != nil {
return err
}
etcdDiscoveryCfg := cluster.GetEtcdDiscovery()
if etcdDiscoveryCfg == nil {
return errors.New("etcd discovery config is nil.")
}
for i:=0;i<len(etcdDiscoveryCfg.EtcdList);i++{
client, cerr := clientv3.New(clientv3.Config{
Endpoints: etcdDiscoveryCfg.EtcdList[i].Endpoints,
DialTimeout: etcdDiscoveryCfg.DialTimeoutMillisecond,
Logger: zap.NewNop(),
})
if cerr != nil {
log.Error("etcd discovery init fail",log.ErrorAttr("err",cerr))
return cerr
}
ctx,_:=context.WithTimeout(context.Background(),time.Second*3)
_,err = client.Leases(ctx)
if err != nil {
log.Error("etcd discovery init fail",log.Any("endpoint",etcdDiscoveryCfg.EtcdList[i].Endpoints),log.ErrorAttr("err",err))
return err
}
ec := &etcdClientInfo{}
for _, networkName := range etcdDiscoveryCfg.EtcdList[i].NetworkName {
ec.watchKeys = append(ec.watchKeys,fmt.Sprintf("%s/%s",originDir,networkName))
}
ed.mapClient[client] = ec
}
return nil
}
func (ed *EtcdDiscoveryService) getRegisterKey(watchkey string) string{
return watchkey+"/"+ed.localNodeId
}
func (ed *EtcdDiscoveryService) registerServiceByClient(client *clientv3.Client,etcdClient *etcdClientInfo) {
// 创建租约
var err error
var resp *clientv3.LeaseGrantResponse
resp, err = client.Grant(context.Background(), cluster.GetEtcdDiscovery().TTLSecond)
if err != nil {
log.Error("etcd registerService fail",log.ErrorAttr("err",err))
ed.tryRegisterService(client,etcdClient)
return
}
etcdClient.leaseID = resp.ID
for _,watchKey:= range etcdClient.watchKeys {
// 注册服务节点到 etcd
_, err = client.Put(context.Background(), ed.getRegisterKey(watchKey), ed.byteLocalNodeInfo, clientv3.WithLease(resp.ID))
if err != nil {
log.Error("etcd Put fail",log.ErrorAttr("err",err))
ed.tryRegisterService(client,etcdClient)
return
}
}
etcdClient.keepAliveChan,err = client.KeepAlive(context.Background(), etcdClient.leaseID)
if err != nil {
log.Error("etcd KeepAlive fail",log.ErrorAttr("err",err))
ed.tryRegisterService(client,etcdClient)
return
}
go func() {
for {
select {
case _, ok := <-etcdClient.keepAliveChan:
//log.Debug("ok",log.Any("addr",client.Endpoints()))
if !ok {
log.Error("etcd keepAliveChan fail",log.Any("watchKeys",etcdClient.watchKeys))
ed.tryRegisterService(client,etcdClient)
return
}
}
}
}()
}
func (ed *EtcdDiscoveryService) tryRegisterService(client *clientv3.Client,etcdClient *etcdClientInfo){
if ed.isStop() {
return
}
ed.AfterFunc(time.Second*3, func(t *timer.Timer) {
ed.registerServiceByClient(client,etcdClient)
})
}
func (ed *EtcdDiscoveryService) tryWatch(client *clientv3.Client,etcdClient *etcdClientInfo) {
if ed.isStop() {
return
}
ed.AfterFunc(time.Second*3, func(t *timer.Timer) {
ed.watchByClient(client,etcdClient)
})
}
func (ed *EtcdDiscoveryService) tryLaterRetire() {
ed.AfterFunc(time.Second, func(*timer.Timer) {
if ed.retire() != nil {
ed.tryLaterRetire()
}
})
}
func (ed *EtcdDiscoveryService) retire() error{
//从etcd中更新
for c,ec := range ed.mapClient {
for _, watchKey := range ec.watchKeys {
// 注册服务节点到 etcd
_, err := c.Put(context.Background(), ed.getRegisterKey(watchKey), ed.byteLocalNodeInfo, clientv3.WithLease(ec.leaseID))
if err != nil {
log.Error("etcd Put fail", log.ErrorAttr("err", err))
return err
}
}
}
return nil
}
func (ed *EtcdDiscoveryService) OnRetire(){
ed.bRetire = true
ed.marshalNodeInfo()
if ed.retire()!= nil {
ed.tryLaterRetire()
}
}
func (ed *EtcdDiscoveryService) OnRelease(){
atomic.StoreInt32(&ed.isClose,1)
ed.close()
}
func (ed *EtcdDiscoveryService) isStop() bool{
return atomic.LoadInt32(&ed.isClose) == 1
}
func (nd *EtcdDiscoveryService) OnStart() {
for c, ec := range nd.mapClient {
nd.tryRegisterService(c,ec)
nd.tryWatch(c,ec)
}
}
func (ed *EtcdDiscoveryService) marshalNodeInfo() error{
nInfo := cluster.GetLocalNodeInfo()
var nodeInfo rpc.NodeInfo
nodeInfo.NodeId = nInfo.NodeId
nodeInfo.ListenAddr = nInfo.ListenAddr
nodeInfo.Retire = ed.bRetire
nodeInfo.PublicServiceList = nInfo.PublicServiceList
nodeInfo.MaxRpcParamLen = nInfo.MaxRpcParamLen
byteLocalNodeInfo,err := proto.Marshal(&nodeInfo)
if err ==nil{
ed.byteLocalNodeInfo = string(byteLocalNodeInfo)
}
return err
}
func (ed *EtcdDiscoveryService) setNodeInfo(networkName string,nodeInfo *rpc.NodeInfo) bool{
if nodeInfo == nil || nodeInfo.Private == true || nodeInfo.NodeId == ed.localNodeId {
return false
}
//筛选关注的服务
var discoverServiceSlice = make([]string, 0, 24)
for _, pubService := range nodeInfo.PublicServiceList {
if cluster.CanDiscoveryService(networkName,pubService) == true {
discoverServiceSlice = append(discoverServiceSlice,pubService)
}
}
if len(discoverServiceSlice) == 0 {
return false
}
var nInfo NodeInfo
nInfo.ServiceList = discoverServiceSlice
nInfo.PublicServiceList = discoverServiceSlice
nInfo.NodeId = nodeInfo.NodeId
nInfo.ListenAddr = nodeInfo.ListenAddr
nInfo.MaxRpcParamLen = nodeInfo.MaxRpcParamLen
nInfo.Retire = nodeInfo.Retire
nInfo.Private = nodeInfo.Private
ed.funSetNode(&nInfo)
return true
}
func (ed *EtcdDiscoveryService) close(){
for c, ec := range ed.mapClient {
if _, err := c.Revoke(context.Background(), ec.leaseID); err != nil {
log.Error("etcd Revoke fail",log.ErrorAttr("err",err))
}
c.Watcher.Close()
err := c.Close()
if err != nil {
log.Error("etcd Close fail",log.ErrorAttr("err",err))
}
}
}
func (ed *EtcdDiscoveryService) getServices(client *clientv3.Client,etcdClient *etcdClientInfo,watchKey string) bool {
// 根据前缀获取现有的key
resp, err := client.Get(context.Background(), watchKey, clientv3.WithPrefix())
if err != nil {
log.Error("etcd Get fail", log.ErrorAttr("err", err))
ed.tryWatch(client, etcdClient)
return false
}
// 遍历获取得到的k和v
ed.notifyGets(watchKey,resp.Kvs)
return true
}
func (ed *EtcdDiscoveryService) watchByClient(client *clientv3.Client,etcdClient *etcdClientInfo){
//先关闭所有的watcher
for _, watchKey := range etcdClient.watchKeys {
// 监视前缀,修改变更server
go ed.watcher(client,etcdClient, watchKey)
}
}
// watcher 监听Key的前缀
func (ed *EtcdDiscoveryService) watcher(client *clientv3.Client,etcdClient *etcdClientInfo,watchKey string) {
defer func() {
if r := recover(); r != nil {
buf := make([]byte, 4096)
l := runtime.Stack(buf, false)
errString := fmt.Sprint(r)
log.Dump(string(buf[:l]),log.String("error",errString))
ed.tryWatch(client,etcdClient)
}
}()
rch := client.Watch(context.Background(), watchKey, clientv3.WithPrefix())
if ed.getServices(client,etcdClient,watchKey) == false {
return
}
for wresp := range rch {
for _, ev := range wresp.Events {
switch ev.Type {
case clientv3.EventTypePut: // 修改或者新增
ed.notifyPut(watchKey,ev.Kv)
case clientv3.EventTypeDelete: // 删除
ed.notifyDelete(watchKey,ev.Kv)
}
}
}
ed.tryWatch(client,etcdClient)
}
func (ed *EtcdDiscoveryService) setNode(netWorkName string,byteNode []byte) string{
var nodeInfo rpc.NodeInfo
err := proto.Unmarshal(byteNode,&nodeInfo)
if err != nil {
log.Error("Unmarshal fail",log.String("netWorkName",netWorkName),log.ErrorAttr("err",err))
return ""
}
ed.setNodeInfo(netWorkName,&nodeInfo)
return nodeInfo.NodeId
}
func (ed *EtcdDiscoveryService) delNode(fullKey string) string{
nodeId := ed.getNodeId(fullKey)
if nodeId == ed.localNodeId {
return ""
}
ed.funDelNode(nodeId)
return nodeId
}
func (ed *EtcdDiscoveryService) getNetworkNameByWatchKey(watchKey string) string{
return watchKey[strings.LastIndex(watchKey,"/")+1:]
}
func (ed *EtcdDiscoveryService) getNetworkNameByFullKey(fullKey string) string{
return fullKey[len(originDir)+1:strings.LastIndex(fullKey,"/")]
}
func (ed *EtcdDiscoveryService) getNodeId(fullKey string) string{
return fullKey[strings.LastIndex(fullKey,"/")+1:]
}
func (ed *EtcdDiscoveryService) OnEtcdDiscovery(ev event.IEvent){
disEvent := ev.(*etcdDiscoveryEvent)
switch disEvent.typ {
case eeGets:
ed.OnEventGets(disEvent.watchKey,disEvent.Kvs)
case eePut:
if len(disEvent.Kvs) == 1 {
ed.OnEventPut(disEvent.watchKey,disEvent.Kvs[0])
}
case eeDelete:
if len(disEvent.Kvs) == 1 {
ed.OnEventDelete(disEvent.watchKey,disEvent.Kvs[0])
}
}
}
func (ed *EtcdDiscoveryService) notifyGets(watchKey string,Kvs []*mvccpb.KeyValue) {
var ev etcdDiscoveryEvent
ev.typ = eeGets
ev.watchKey = watchKey
ev.Kvs = Kvs
ed.NotifyEvent(&ev)
}
func (ed *EtcdDiscoveryService) notifyPut(watchKey string,Kvs *mvccpb.KeyValue) {
var ev etcdDiscoveryEvent
ev.typ = eePut
ev.watchKey = watchKey
ev.Kvs = append(ev.Kvs,Kvs)
ed.NotifyEvent(&ev)
}
func (ed *EtcdDiscoveryService) notifyDelete(watchKey string,Kvs *mvccpb.KeyValue) {
var ev etcdDiscoveryEvent
ev.typ = eeDelete
ev.watchKey = watchKey
ev.Kvs = append(ev.Kvs,Kvs)
ed.NotifyEvent(&ev)
}
func (ed *EtcdDiscoveryService) OnEventGets(watchKey string,Kvs []*mvccpb.KeyValue) {
mapNode := make(map[string]struct{},32)
for _, kv := range Kvs {
nodeId := ed.setNode(ed.getNetworkNameByFullKey(string(kv.Key)), kv.Value)
mapNode[nodeId] = struct{}{}
ed.addNodeId(watchKey,nodeId)
}
// 此段代码为遍历并删除过期节点的逻辑。
// 对于mapDiscoveryNodeId中与watchKey关联的所有节点ID,遍历该集合。
// 如果某个节点ID不在mapNode中且不是本地节点ID,则调用funDelNode函数删除该节点。
mapLastNodeId := ed.mapDiscoveryNodeId[watchKey] // 根据watchKey获取对应的节点ID集合
for nodeId := range mapLastNodeId { // 遍历所有节点ID
if _,ok := mapNode[nodeId];ok == false && nodeId != ed.localNodeId { // 检查节点是否不存在于mapNode且不是本地节点
ed.funDelNode(nodeId) // 调用函数删除该节点
delete(ed.mapDiscoveryNodeId[watchKey],nodeId)
}
}
}
func (ed *EtcdDiscoveryService) OnEventPut(watchKey string,Kv *mvccpb.KeyValue) {
nodeId := ed.setNode(ed.getNetworkNameByFullKey(string(Kv.Key)), Kv.Value)
ed.addNodeId(watchKey,nodeId)
}
func (ed *EtcdDiscoveryService) OnEventDelete(watchKey string,Kv *mvccpb.KeyValue) {
nodeId := ed.delNode(string(Kv.Key))
delete(ed.mapDiscoveryNodeId[watchKey],nodeId)
}
func (ed *EtcdDiscoveryService) addNodeId(watchKey string,nodeId string) {
if _,ok := ed.mapDiscoveryNodeId[watchKey];ok == false {
ed.mapDiscoveryNodeId[watchKey] = make(map[string]struct{})
}
ed.mapDiscoveryNodeId[watchKey][nodeId] = struct{}{}
}
func (ed *EtcdDiscoveryService) OnNodeDisconnect(nodeId string) {
//将Discard结点清理
cluster.DiscardNode(nodeId)
}
func (ed *EtcdDiscoveryService) RPC_ServiceRecord(etcdServiceRecord *service.EtcdServiceRecordEvent,empty *service.Empty) error{
var client *clientv3.Client
//写入到etcd中
for c, info := range ed.mapClient{
for _,watchKey := range info.watchKeys {
if ed.getNetworkNameByWatchKey(watchKey) == etcdServiceRecord.NetworkName {
client = c
break
}
}
}
if client == nil {
log.Error("etcd record fail,cannot find network name",log.String("networkName",etcdServiceRecord.NetworkName))
return errors.New("annot find network name")
}
var lg *clientv3.LeaseGrantResponse
var err error
if etcdServiceRecord.TTLSecond > 0 {
ctx,_:=context.WithTimeout(context.Background(),time.Second*3)
lg, err = client.Grant(ctx, etcdServiceRecord.TTLSecond)
if err != nil {
log.Error("etcd record fail,cannot grant lease",log.ErrorAttr("err",err))
return errors.New("cannot grant lease")
}
}
if lg != nil {
ctx,_:=context.WithTimeout(context.Background(),time.Second*3)
_, err = client.Put(ctx, path.Join(originDir,etcdServiceRecord.RecordKey),etcdServiceRecord.RecordInfo, clientv3.WithLease(lg.ID))
if err != nil {
log.Error("etcd record fail,cannot put record",log.ErrorAttr("err",err))
}
return errors.New("cannot put record")
}
_,err = client.Put(context.Background(), path.Join(originDir,etcdServiceRecord.RecordKey),etcdServiceRecord.RecordInfo)
if err != nil {
log.Error("etcd record fail,cannot put record",log.ErrorAttr("err",err))
return errors.New("cannot put record")
}
return nil
}