修改nginx up配置后,将服务器标记为备份:
upstream backend {
server backup1.example.com:8080;
server backup2.example.com:8080;
}
到这个
upstream backend {
server backup1.example.com:8080;
server backup2.example.com:8080 backup;
}
backup2.example.com:8080上的现有连接会发生什么?它们会立即路由到backup1.example.com还是会在backup2.example.com上保留,直到连接断开连接?