|
|
package gojobs
|
|
|
|
|
|
import (
|
|
|
"context"
|
|
|
"errors"
|
|
|
"fmt"
|
|
|
"go.dtapp.net/library/utils/goip"
|
|
|
"go.etcd.io/etcd/client/v3"
|
|
|
"log"
|
|
|
"time"
|
|
|
)
|
|
|
|
|
|
// NewEtcdWorker 创建 etcd Worker
|
|
|
func NewEtcdWorker(config *EtcdConfig) (*Etcd, error) {
|
|
|
|
|
|
var (
|
|
|
e = &Etcd{}
|
|
|
err error
|
|
|
)
|
|
|
|
|
|
e.Endpoints = config.Endpoints
|
|
|
e.DialTimeout = config.DialTimeout
|
|
|
if config.LocalIP == "" {
|
|
|
config.LocalIP = goip.GetOutsideIp()
|
|
|
}
|
|
|
e.LocalIP = config.LocalIP
|
|
|
e.Username = config.Username
|
|
|
e.Password = config.Password
|
|
|
e.CustomDirectory = config.CustomDirectory
|
|
|
|
|
|
v3Config := clientv3.Config{
|
|
|
Endpoints: e.Endpoints,
|
|
|
DialTimeout: e.DialTimeout,
|
|
|
}
|
|
|
|
|
|
// 判断有没有配置用户信息
|
|
|
if e.Username != "" {
|
|
|
v3Config.Username = e.Username
|
|
|
v3Config.Password = e.Password
|
|
|
}
|
|
|
|
|
|
e.Client, err = clientv3.New(v3Config)
|
|
|
if err != nil {
|
|
|
return nil, errors.New("连接失败:" + err.Error())
|
|
|
}
|
|
|
|
|
|
// 获得kv API子集
|
|
|
e.Kv = clientv3.NewKV(e.Client)
|
|
|
|
|
|
// 创建一个lease(租约)对象
|
|
|
e.Lease = clientv3.NewLease(e.Client)
|
|
|
|
|
|
// 注册服务
|
|
|
go e.RegisterWorker()
|
|
|
|
|
|
return e, nil
|
|
|
}
|
|
|
|
|
|
// RegisterWorker 注册worker
|
|
|
func (e Etcd) RegisterWorker() {
|
|
|
var (
|
|
|
regKey string
|
|
|
leaseGrantResp *clientv3.LeaseGrantResponse
|
|
|
err error
|
|
|
keepAliveChan <-chan *clientv3.LeaseKeepAliveResponse
|
|
|
keepAliveResp *clientv3.LeaseKeepAliveResponse
|
|
|
cancelCtx context.Context
|
|
|
cancelFunc context.CancelFunc
|
|
|
)
|
|
|
|
|
|
for {
|
|
|
// 注册路径
|
|
|
regKey = getJobWorkerDir(e) + e.LocalIP
|
|
|
log.Println("租约:", regKey)
|
|
|
|
|
|
cancelFunc = nil
|
|
|
|
|
|
// 申请一个10秒的租约
|
|
|
leaseGrantResp, err = e.Lease.Grant(context.TODO(), 10)
|
|
|
if err != nil {
|
|
|
log.Println("申请一个10秒的租约失败", err)
|
|
|
goto RETRY
|
|
|
}
|
|
|
|
|
|
// 自动永久续租
|
|
|
keepAliveChan, err = e.Lease.KeepAlive(context.TODO(), leaseGrantResp.ID)
|
|
|
if err != nil {
|
|
|
log.Println("自动永久续租失败", err)
|
|
|
goto RETRY
|
|
|
}
|
|
|
|
|
|
cancelCtx, cancelFunc = context.WithCancel(context.TODO())
|
|
|
|
|
|
// 注册到etcd
|
|
|
_, err = e.Kv.Put(cancelCtx, regKey, "", clientv3.WithLease(leaseGrantResp.ID))
|
|
|
if err != nil {
|
|
|
log.Println(fmt.Sprintf(" %s 服务注册失败:%s", regKey, err))
|
|
|
goto RETRY
|
|
|
}
|
|
|
|
|
|
// 处理续约应答的协程
|
|
|
for {
|
|
|
select {
|
|
|
case keepAliveResp = <-keepAliveChan:
|
|
|
if keepAliveResp == nil {
|
|
|
log.Println("续租失败")
|
|
|
goto RETRY
|
|
|
} else {
|
|
|
log.Println("收到自动续租应答:", leaseGrantResp.ID)
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
RETRY:
|
|
|
log.Println("异常 RETRY ", regKey)
|
|
|
time.Sleep(1 * time.Second)
|
|
|
if cancelFunc != nil {
|
|
|
cancelFunc()
|
|
|
}
|
|
|
}
|
|
|
}
|