Service Discovery

Pattern

Client Side Discovery

• ttnet?

Server Side Discovery

• Load Balancing

Methods

• DNS SRV records
  • Downside
    • Rely on cache
    • No health check
    • No notification mechanism
• mDNS (multicase DNS)
  • Downside
    • Rely on cache
    • Rely on IP multicast
    • No health check
    • No notification mechanism
• ZooKeeper / Apache Curator

Example

const response = await fetch("http://inventory/stock/apple");
 
if (!response.ok) {
  throw new Error(`库存查询失败：${response.status}`);
}
 
const stock = await response.json();
console.log(stock.remaining);

Links

• ZooKeeper
• Etcd
• Consul