RocketMQ教程(三) - 高可用部署
目录
(一)基础
(二)进阶
(三)高可用部署
(四)常见问题
正文
这里采用双主双从的配置，选择Linux系统，并假定两台服务器的私有IP分别为192.168.0.1和192.168.0.2。
下载
http://rocketmq.apache.org/dowloading/releases/
解压
unzip rocketmq-all-4.5.0-bin-release.zip
分别在两台服务器上启动NameServer
nohup sh bin/mqnamesrv &服务器1 Master Broker配置(conf/broker.conf)
namesrvAddr = 192.168.0.1:9876;192.168.0.2:9876
brokerClusterName = DefaultCluster
brokerIP1 = 192.168.0.1
brokerIP2 = 192.168.0.1
brokerName = broker-a
brokerId = 0
deleteWhen = 04
fileReservedTime = 168
brokerRole = SYNC_MASTER
flushDiskType = ASYNC_FLUSH
listenPort = 10911
storePathRootDir = /home/rocketmq/store-a
sendMessageThreadPoolNums = 32其中
namesrvAddr
NameServer的地址，配置多个以保证NameServer的高可用。
brokerClusterName
Cluster的地址，如果集群机器数比较多，可以分成多个Cluster，每个Cluster 供一个业务群使用。
brokerIP1
Broker监听的IP，如果有多个网卡，按需要配置公网或内网IP。
brokerIP2
Slave Broker连接主Broker的IP。
brokerName
Broker的名称，Master和Slave通过使用相同的Broker名称来表明相互关系。
brokerId
一个Master Broker可以有多个Slave，0表示Master，大于0表示不同Slave 的ID。
fileReservedTime
在磁盘上保存消息的时长，单位是小时，自动删除超时的消息。
deleteWhen
与fileReservedTime参数呼应，表明在几点做消息删除动作，默认值04表示凌晨4点。
brokerRole
SYNC_MASTER表示当Slave 和Master 消息同步完成后，再返回发送成功的状态。
flushDiskType
刷盘策略，分为SYNC_FLUSH和ASYNC_FLUSH两种，分别代表同步刷盘和异步刷盘。
listenPort
Broker监听的端口号，如果一台机器上启动了多个Broker，则要设置不同的端口号，避免冲突。服务器2 Master Broker配置(conf/broker.conf)
namesrvAddr = 192.168.0.1:9876;192.168.0.2:9876
brokerClusterName = DefaultCluster
brokerIP1 = 192.168.0.2
brokerIP2 = 192.168.0.2
brokerName = broker-b
brokerId = 0
deleteWhen = 04
fileReservedTime = 168
brokerRole = SYNC_MASTER
flushDiskType = ASYNC_FLUSH
listenPort = 10911
storePathRootDir = /home/rocketmq/store-b
sendMessageThreadPoolNums = 32服务器1 Slave Broker配置(conf/broker.conf)
namesrvAddr = 192.168.0.1:9876;192.168.0.2:9876
brokerClusterName = DefaultCluster
brokerIP1 = 192.168.0.1
brokerName = broker-b
brokerId = 1
deleteWhen = 04
fileReservedTime = 168
brokerRole = SLAVE
flushDiskType = ASYNC_FLUSH
listenPort=11011
storePathRootDir = /home/rocketmq/store-b
sendMessageThreadPoolNums = 32服务器2 Slave Broker配置(conf/broker.conf)
namesrvAddr = 192.168.0.1:9876;192.168.0.2:9876
brokerClusterName = DefaultCluster
brokerIP1 = 192.168.0.2
brokerName = broker-a
brokerId = 1
deleteWhen = 04
fileReservedTime = 168
brokerRole = SLAVE
flushDiskType = ASYNC_FLUSH
listenPort=11011
storePathRootDir = /home/rocketmq/store-a
sendMessageThreadPoolNums = 32分别启动两个Master Broker和两个Slave Broker
nohup sh bin/mqbroker -c conf/broker.conf &这样一个高可用的RocketMQ集群就搭建好了，下面使用rocketmq-console检查其状态。
下载
https://github.com/apache/rocketmq-externals/tree/master/rocketmq-console
编译
mvn clean package -Dmaven.test.skip=true
在编译的rocketmq-console-ng-1.0.0.jar同目录下创建application.properties文件
server.contextPath=
server.port=8080
spring.application.name=rocketmq-console
spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
spring.http.encoding.force=true
logging.config=classpath:logback.xml
rocketmq.config.namesrvAddr=192.168.0.1:9876;192.168.0.2:9876
rocketmq.config.isVIPChannel=false
rocketmq.config.dataPath=/tmp/rocketmq-console/data
rocketmq.config.enableDashBoardCollect=true
rocketmq.config.msgTrackTopicName=启动
java -jar rocketmq-console-ng-1.0.0.jar用浏览器访问http://192.168.0.1:8080/#/cluster
