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register.go
110 lines (101 loc) · 2.35 KB
/
register.go
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package register
import (
"context"
"encoding/json"
"fmt"
"github.com/robfig/cron/v3"
"github.com/shirou/gopsutil/cpu"
"go.etcd.io/etcd/client/v3"
"go.uber.org/zap"
"strconv"
"time"
)
type Register struct {
etcdCli *clientv3.Client
keepAliveChan <-chan *clientv3.LeaseKeepAliveResponse
opts *Options
name string
}
func NewRegister(opt ...RegisterOptions) (*Register, error) {
s := &Register{
opts: newOptions(opt...),
}
var ctx, cancel = context.WithTimeout(context.Background(), time.Duration(s.opts.RegisterTtl)*time.Second)
defer cancel()
data, err := json.Marshal(s.opts)
if err != nil {
return nil, err
}
etcdCli, err := clientv3.New(s.opts.EtcdConf)
if err != nil {
return nil, err
}
s.etcdCli = etcdCli
//申请租约
resp, err := etcdCli.Grant(ctx, s.opts.RegisterTtl)
if err != nil {
return s, err
}
s.name = fmt.Sprintf("%s/%s", s.opts.Node.Path, s.opts.Node.Id)
//注册节点
_, err = etcdCli.Put(ctx, s.name, string(data), clientv3.WithLease(resp.ID))
if err != nil {
return s, err
}
//续约租约
s.keepAliveChan, err = etcdCli.KeepAlive(context.Background(), resp.ID)
if err != nil {
return s, err
}
return s, nil
}
func (s *Register) ListenKeepAliveChan() (isClose bool) {
for range s.keepAliveChan {
}
return true
}
func (s *Register) CrontabUpdate() {
crontab := cron.New()
ctx := context.Background()
resp, err := s.etcdCli.Grant(ctx, s.opts.RegisterTtl)
if err != nil {
return
}
task := func() {
percent, _ := cpu.Percent(time.Second, false)
if len(percent) <= 0 {
percent = []float64{80}
}
usage := int64(float64(80) / percent[0])
value := strconv.FormatInt(usage, 10)
s.opts.SetWeight(value)
data, err := json.Marshal(s.opts)
if err != nil {
return
}
_, err = s.etcdCli.Put(ctx, s.name, string(data))
if err != nil {
return
}
//续约租约
s.keepAliveChan, err = s.etcdCli.KeepAlive(context.Background(), resp.ID)
if err != nil {
return
}
}
// 添加定时任务, * * * * * 是 crontab,表示每分钟执行一次
_, err = crontab.AddFunc("* * * * *", task)
if err != nil {
zap.S().Fatalf("AddFunc err :%w ", err)
return
}
// 启动定时器
crontab.Start()
}
// Close 注销服务
func (s *Register) Close() error {
if _, err := s.etcdCli.Delete(context.Background(), s.name); err != nil {
return err
}
return s.etcdCli.Close()
}