Leader election is a crucial component in distributed systems, where multiple nodes must agree on a single node to act as the coordinator or leader. This ensures that actions are consistent and reliable. Common algorithms to achieve leader election include the Bully algorithm and the Ring algorithm, among others.
// Example of a simple leader election algorithm
package main
import (
"fmt"
"sync"
"time"
)
type Node struct {
id int
isLeader bool
electionCh chan bool
}
func (n *Node) startElection(others []*Node, wg *sync.WaitGroup) {
defer wg.Done()
for _, other := range others {
if other.id > n.id {
n.electionCh <- false
return
}
}
n.isLeader = true
fmt.Printf("Node %d is the leader\n", n.id)
}
func main() {
var wg sync.WaitGroup
nodes := []*Node{
{id: 1, electionCh: make(chan bool)},
{id: 2, electionCh: make(chan bool)},
{id: 3, electionCh: make(chan bool)},
}
for _, node := range nodes {
wg.Add(1)
go node.startElection(nodes, &wg)
}
wg.Wait()
}
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