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Go实现的高性能Spring Cloud网关(支持Consul和Eureka), 路由配置热更新、负载均衡、灰度、服务粒度的流量控制、服务粒度的流量统计

License: MIT License

Go 98.30% Lua 1.59% Shell 0.11%
golang spring-cloud

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gogate's Issues

刷新本地服务列表instance个数一直是1的问题,导致无法进行负载均衡

现象

某个服务有3个instance,但是路由的时候发现这个服务只有一个instance,groupByService获取的newRegistryMap中的value值一直是一个元素的slice。

原因

// 将所有实例按服务名进行分组
func groupByService(instances []*discovery.InstanceInfo) *sync.Map {
	servMap := new(sync.Map)
	for _, ins := range instances {
		infosGeneric, exist := servMap.Load(ins.ServiceName)
		if !exist {
			infosGeneric = make([]*discovery.InstanceInfo, 0, 5)
			infos, _ := infosGeneric.([]*discovery.InstanceInfo)
			infos = append(infos, ins)

			servMap.Store(ins.ServiceName, infos)

		} else {
			infos, _ := infosGeneric.([]*discovery.InstanceInfo)
			infos = append(infos, ins)
		}
	}

	return servMap
}

这个方法中的

infos, _ := infosGeneric.([]*discovery.InstanceInfo)
infos = append(infos, ins)

infos append之后是一个新的slice引用和infosGeneric不一样(虽然两个%p输出的指针一样,因为底层公用的同一个数组,但是还是两个不同的引用)
测试代码
image
image

修复

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