How do I implement leader election?

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() }

leader election distributed systems coordination consensus algorithms Bully algorithm Ring algorithm