[1、配置语法与场景](1%E3%80%81_%E9%85%8D%E7%BD%AE%E8%AF%AD%E6%B3%95.md) [2、参数讲解](2%E3%80%81%E5%8F%82%E6%95%B0%E8%AE%B2%E8%A7%A3.md) [3、backup状态演示](3%E3%80%81backup%E7%8A%B6%E6%80%81%E6%BC%94%E7%A4%BA.md) [4、轮询策略](4%E3%80%81%E8%BD%AE%E8%AF%A2%E7%AD%96%E7%95%A5.md)