1.安装JDK
需要先卸载系统默认的OPENJDK,安装 JDK1.8 64位的版本。
卸载open-jdk
rpm -qa|grep java
查到open jdk的安装。
使用命令
rpm -e --nodeps ***
卸载。
安装 jdk1.8
tar -zxvf jdk-8u191-linux-x64.tar.gz 解压JDK
编辑
/etc/profile
在最后增加配置
export JAVA_HOME=/work/jdk1.8.0_191
export PATH=$JAVA_HOME/bin:$PATH
rocketmq 集群搭建
1.部署架构
我们有两台节点
IP为 10.87.134.74，10.87.134.75，两台机器均运行NAMESERVER.
在74 上部署BROKER A MASTER,BROKER B SLAVE
在75 上部署BROKER A SLAVE,BROKER B MASTER
2.修改内存配置
在默认情况下 rocketmq 配置运行内存比较大，如果机器内存不够可以做些调整。
编辑 bin 目录下的runbroker.sh文件
JAVA_OPT="${JAVA_OPT} -server -Xms2g -Xmx2g -Xmn1g"
编辑 bin 目录下的 runserver.sh 文件
JAVA_OPT="${JAVA_OPT} -server -Xms1g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m"
3.准备集群配置文件
我们安装的主从异步模式
程序解压后在conf 有如下的配置文件
编辑节点74 的配置文件
编辑broker-a.properties 内容：
brokerClusterName=DefaultCluster brokerName=broker-a brokerId=0 deleteWhen=04 fileReservedTime=48 brokerRole=ASYNC_MASTER flushDiskType=ASYNC_FLUSH listenPort=6001 autoCreateTopicEnable=true namesrvAddr=10.87.134.74:9876;10.87.134.75:9876 storePathRootDir=/work/rocketmq-4.5.1/store/broker-a storePathCommitLog=/work/rocketmq-4.5.1/store/broker-a/commitlog storePathConsumeQueue=/work/rocketmq-4.5.1/store/broker-a/consumequeue storePathIndex=/work/rocketmq-4.5.1/store/broker-a/index storeCheckpoint=/work/rocketmq-4.5.1/store/broker-a/checkpoint abortFile=/work/rocketmq-4.5.1/store/broker-a/abort
编辑broker-b-s.properties 文件内容
brokerClusterName=DefaultCluster brokerName=broker-b brokerId=1 deleteWhen=04 fileReservedTime=48 brokerRole=SLAVE flushDiskType=ASYNC_FLUSH listenPort=7001 autoCreateTopicEnable=true namesrvAddr=10.87.134.74:9876;10.87.134.75:9876 storePathRootDir=/work/rocketmq-4.5.1/store/broker-b storePathCommitLog=/work/rocketmq-4.5.1/store/broker-b/commitlog storePathConsumeQueue=/work/rocketmq-4.5.1/store/broker-b/consumequeue storePathIndex=/work/rocketmq-4.5.1/store/broker-b/index storeCheckpoint=/work/rocketmq-4.5.1/store/broker-b/checkpoint abortFile=/work/rocketmq-4.5.1/store/broker-b/abort
编辑75 配置文件
编辑 broker-b.properties 文件
terName=DefaultCluster brokerName=broker-b brokerId=0 deleteWhen=04 fileReservedTime=48 brokerRole=ASYNC_MASTER flushDiskType=ASYNC_FLUSH listenPort=7001 autoCreateTopicEnable=true namesrvAddr=10.87.134.74:9876;10.87.134.75:9876 storePathRootDir=/work/rocketmq-4.5.1/store/broker-b storePathCommitLog=/work/rocketmq-4.5.1/store/broker-b/commitlog storePathConsumeQueue=/work/rocketmq-4.5.1/store/broker-b/consumequeue storePathIndex=/work/rocketmq-4.5.1/store/broker-b/index storeCheckpoint=/work/rocketmq-4.5.1/store/broker-b/checkpoint abortFile=/work/rocketmq-4.5.1/store/broker-b/abort
编辑 broker-a-s.properties 文件
brokerClusterName=DefaultCluster brokerName=broker-a brokerId=1 deleteWhen=04 fileReservedTime=48 brokerRole=SLAVE flushDiskType=ASYNC_FLUSH listenPort=6001 autoCreateTopicEnable=true namesrvAddr=10.87.134.74:9876;10.87.134.75:9876 storePathRootDir=/work/rocketmq-4.5.1/store/broker-a storePathCommitLog=/work/rocketmq-4.5.1/store/broker-a/commitlog storePathConsumeQueue=/work/rocketmq-4.5.1/store/broker-a/consumequeue storePathIndex=/work/rocketmq-4.5.1/store/broker-a/index storeCheckpoint=/work/rocketmq-4.5.1/store/broker-a/checkpoint abortFile=/work/rocketmq-4.5.1/store/broker-a/abort
listenPort：是broker 对外监听的端口。
我们需要创建以下的目录：
store/broker-a
store/broker-a/commitlog
store/broker-a/consumequeue
store/broker-a/index 目录
在两个节点上分别创建 broker-a,broker-b的目录。
4.启动rocketmq ,并检查是否正确。
1.启动nameserver
在两个节点上分别执行：
nohup sh /work/rocketmq-4.5.1/bin/mqnamesrv >/work/rocketmq-4.5.1/logs/mqnamesrv.log 2>&1 &
2.按照下面的顺序执行
1.启动broker-a (节点1)
nohup sh /work/rocketmq-4.5.1/bin/mqbroker -c /work/rocketmq-4.5.1/conf/2m2sasync/broker-a.properties > /work/rocketmq-4.5.1/logs/broker-a.log 2>&1 &
2.启动broker-a-s (节点2)
nohup sh /work/rocketmq-4.5.1/bin/mqbroker -c /work/rocketmq-4.5.1/conf/2m2sasync/broker-a-s.properties > /work/rocketmq-4.5.1/logs/broker-a-s.log 2>&1 &
3.启动broker-b (节点2)
nohup sh /work/rocketmq-4.5.1/bin/mqbroker -c /work/rocketmq-4.5.1/conf/2m2sasync/broker-b.properties > /work/rocketmq-4.5.1/logs/broker-b.log 2>&1 &
4.启动broker-b-s (节点1)
nohup sh /work/rocketmq-4.5.1/bin/mqbroker -c /work/rocketmq-4.5.1/conf/2m2sasync/broker-b-s.properties > /work/rocketmq-4.5.1/logs/broker-b-s.log 2>&1 &
3. 查看节点配置是否正确
执行命令 ./bin/mqadmin clusterList -n 10.87.134.75:9876
出现4个这样的配置说明，大功告成了。
5.注意事项
故障1
在启动 broker 时报如下错误。
ERROR: Please set the JAVA_HOME variable in your environment, We need java(x64)! !!
解决办法：
注释上面三行，增加 JAVA_HOME即可。