You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
1.9 KiB
100 lines
1.9 KiB
package gojobs
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"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
|
|
|
|
e.Client, err = clientv3.New(clientv3.Config{
|
|
Endpoints: e.Endpoints,
|
|
DialTimeout: e.DialTimeout,
|
|
})
|
|
if err != nil {
|
|
return nil, errors.New("连接失败:" + err.Error())
|
|
}
|
|
|
|
// 得到KV和Lease的API子集
|
|
e.Kv = clientv3.NewKV(e.Client)
|
|
e.Lease = clientv3.NewLease(e.Client)
|
|
|
|
// 注册
|
|
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 = JobWorkerDir + e.LocalIP
|
|
|
|
cancelFunc = nil
|
|
|
|
// 创建租约
|
|
leaseGrantResp, err = e.Lease.Grant(context.TODO(), 10)
|
|
log.Println("创建租约")
|
|
if err != nil {
|
|
goto RETRY
|
|
}
|
|
|
|
// 自动续租
|
|
keepAliveChan, err = e.Lease.KeepAlive(context.TODO(), leaseGrantResp.ID)
|
|
log.Println("自动续租")
|
|
if err != nil {
|
|
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
|
|
}
|
|
|
|
// 处理续租应答
|
|
for {
|
|
select {
|
|
case keepAliveResp = <-keepAliveChan:
|
|
if keepAliveResp == nil { // 续租失败
|
|
log.Println("续租失败")
|
|
goto RETRY
|
|
}
|
|
}
|
|
}
|
|
|
|
RETRY:
|
|
time.Sleep(1 * time.Second)
|
|
if cancelFunc != nil {
|
|
cancelFunc()
|
|
}
|
|
}
|
|
}
|