15.5. 在多站点、容错消息传递系统中配置代理

流程

1. 编辑 live-backup 组中每个代理的 broker.xml 配置文件。将每个代理配置为使用 Ceph 文件系统中的相同分页、绑定、日志和大型消息目录。

   # Master Broker - DC1
   <paging-directory>mnt/cephfs/broker1/paging</paging-directory>
   <bindings-directory>/mnt/cephfs/data/broker1/bindings</bindings-directory>
   <journal-directory>/mnt/cephfs/data/broker1/journal</journal-directory>
   <large-messages-directory>mnt/cephfs/data/broker1/large-messages</large-messages-directory>
   
   # Slave Broker - DC1
   <paging-directory>mnt/cephfs/broker1/paging</paging-directory>
   <bindings-directory>/mnt/cephfs/data/broker1/bindings</bindings-directory>
   <journal-directory>/mnt/cephfs/data/broker1/journal</journal-directory>
   <large-messages-directory>mnt/cephfs/data/broker1/large-messages</large-messages-directory>
   
   # Backup Broker (Idle) - DC2
   <paging-directory>mnt/cephfs/broker1/paging</paging-directory>
   <bindings-directory>/mnt/cephfs/data/broker1/bindings</bindings-directory>
   <journal-directory>/mnt/cephfs/data/broker1/journal</journal-directory>
   <large-messages-directory>mnt/cephfs/data/broker1/large-messages</large-messages-directory>

2. 将备份代理配置为 HA 策略中的 master，如下所示。此配置设置可确保当您手动启动备份代理时，备份代理会立即变为 master。因为代理是一个空闲的备份，所以您可以为活跃 master 代理指定 failover-on-shutdown 参数不会应用它。

   <configuration>
       <core>
           ...
           <ha-policy>
               <shared-store>
                   <master>
                   </master>
               </shared-store>
           </ha-policy>
           ...
       </core>
   </configuration>