/
main.go
60 lines (55 loc) · 1.25 KB
/
main.go
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package main
import (
"context"
"errors"
"fmt"
clientv3 "go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/client/v3/concurrency"
"log"
"time"
)
func main() {
endpoints := []string{"localhost:2379"}
key := "/my-election"
//pid := os.Getegid()
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
//ctx, cancel := context.WithCancel(context.Background())
defer cancel()
client, err := clientv3.New(clientv3.Config{
Endpoints: endpoints,
DialTimeout: 5 * time.Second,
})
if err != nil {
log.Fatal(err)
}
size := 10
elections := make([]*concurrency.Election, size)
for i := 0; i < 10; i++ {
session, err := concurrency.NewSession(client)
if err != nil {
log.Fatal(err)
}
election := concurrency.NewElection(session, key)
elections[i] = election
}
myNode := "myNode1"
var leader *concurrency.Election
for i := 0; i < size; i++ {
go func(i int) {
election := elections[i]
err := election.Campaign(ctx, myNode)
if err != nil {
if errors.Is(err, context.DeadlineExceeded) {
fmt.Println("lose in campaign, ", i)
return
}
fmt.Println(err)
return
}
fmt.Println("I am the leader, ", i)
leader = election
}(i)
}
time.Sleep(time.Second * 1)
_ = leader.Resign(context.Background())
}