用GO做推送
- golang.org/x/net/http2 (注: GFW已墙, 请到海外服务器下载)
- github.com/gorilla/websocket
- gateway: 长连接网关
- 海量长连接按BUCKET打散, 减小推送遍历的锁粒度
- 按广播/房间粒度的消息前置合并, 减少编码CPU损耗, 减少系统网络调用, 巨幅提升吞吐
- logic: 逻辑服务器
- 本身无状态, 负责将推送消息分发到所有gateway节点
- 对调用方暴露HTTP/1接口, 方便业务对接
- 采用HTTP/2长连接RPC向gateway分发消息
- 推送主要瓶颈是gateway层而不是内部通讯, 所以gateway和logic之间仍旧采用了小包通讯(对网卡有PPS压力), 同时logic为业务提供了批量推送接口来缓解特殊需求.
- 16 vcore
- client, logic, gateway deployed together
curl http://localhost:7799/push/all -d 'items=[{"msg": "hi"},{"msg": "bye"}]'
curl http://localhost:7799/push/room -d 'room=default&items=[{"msg": "hi"},{"msg": "bye"}]'
- PING(upstream)
{"type": "PING", "data": {}}
- PONG(downstream)
{"type": "PONG", "data": {}}
- PUSH(downstream)
{"type": "PUSH", "data": {"items": [{"name": "go-push"}, {"age": "1"}]}}