gokit sd包 service-discovery lb load-balancer circuitbreaker

// Package sd provides utilities related to service discovery. That includes the
// client-side loadbalancer pattern, where a microservice subscribes to a
// service discovery system in order to reach remote instances; as well as the
// registrator pattern, where a microservice registers itself in a service
// discovery system. Implementations are provided for most common systems.
package sd

consul etcd eruka zookeeper and so on

// Package lb implements the client-side load balancer pattern. When combined
// with a service discovery system of record, it enables a more decentralized
// architecture, removing the need for separate load balancers like HAProxy.
package lb

random roundrobin and so on

Circuit breakers prevent thundering herds, and improve resiliency against intermittent errors. Every client-side(see this ) endpoint should be wrapped in acircuit breaker.