Go语言服务网格负载均衡策略

Go语言服务网格负载均衡策略

1. 负载均衡算法

packageloadbalancetypeLoadBalancerinterface{Select([]string)string}typeRoundRobinstruct{indexintmu sync.Mutex}funcNewRoundRobin()*RoundRobin{return&RoundRobin{}}func(r*RoundRobin)Select(endpoints[]string)string{r.mu.Lock()deferr.mu.Unlock()iflen(endpoints)==0{return""}endpoint:=endpoints[r.index%len(endpoints)]r.index++returnendpoint}typeLeastConnectionsstruct{connectionsmap[string]intmu sync.RWMutex}funcNewLeastConnections()*LeastConnections{return&LeastConnections{connections:make(map[string]int),}}func(l*LeastConnections)Select(endpoints[]string)string{l.mu.RLock()deferl.mu.RUnlock()varselectedstringminConn:=int(^uint(0)>>1)for_,endpoint:=rangeendpoints{conn:=l.connections[endpoint]ifconn<minConn{minConn=conn selected=endpoint}}returnselected}func(l*LeastConnections)Increment(endpointstring){l.mu.Lock()l.connections[endpoint]++l.mu.Unlock()}func(l*LeastConnections)Decrement(endpointstring){l.mu.Lock()l.connections[endpoint]--l.mu.Unlock()}

2. 总结

服务网格提供多种负载均衡策略，Go语言可以实现各种算法以适应不同的业务场景。