............................................................................... 19 5 Heartbeat+DRBD+mysql 高可用方案 .................................................................................... 20 ........................ 20 5.5.2 DRBD 的安装 .................................................................................................... 20 5.5.3 DRBD 的配置 ................................ .................................................................... 21 5.5.4 DRBD 的管理维护 ............................................................................................ 21 5.5.5 Heartbeat