linux 环境下rocketMq的安装（单机） 以及所碰到的问题

 1：在安装mq之前先确保安装了以下软件 不然会在编译时报 git，mvn命令找不到，这几个文件均安装在 /usr/local下

             git-2 13.1.tar.gz

             apache-maven-3.5.0-bin.tar.gz

             RocketMQ-3.5.8.tar.gz

             jdk-8u131-linux-x64.tar.gz

如图所示

2 ：安装完 jdk和maven之后再/ect/profile中配置环境变量  执行 source profile 使得环境变量生效

export JAVA_HOME=/usr/local/jdk1.8.0_131
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

MAVEN_HOME=/usr/local/apache-maven-3.5.0
export MAVEN_HOME
export PATH=${PATH}:${MAVEN_HOME}/bin

3：将rocketMQ解压到/usr/local/rockemq-source下，解压过后在/usr/local/rockemq-source/RocketMQ-3.5.8/下执行命令 sh  Install.sh 进行编译

编译后源文件中会新增以下文件，而我们执行命令真正要操作的是 target下边bin（/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin）中的各项命令，否则容易出现 Could not find or load main class 类似的错误

drwxr-xr-x 5 root root  4096 Jun 27 16:56 target

lrwxrwxrwx 1 root root 47 Jun 27 16:56 devenv -> target/alibaba-rocketmq-broker/alibaba-rocketmq

安装目录如图

4：配置mq的环境变量并使其生效

echo "ROCKETMQ_HOME=`pwd`" >> ~/.bash_profile
source ~/.bash_profile 

我查看了下./bash_profile中写入的配置（/root文件夹下用 ls -al命令查看）

PATH=$PATH:$HOME/bin
export PATH
ROCKETMQ_HOME=/usr/local/rockemq-source/RocketMQ-3.5.8/devenv

5：启动 mqnameserver

nohup sh mqnamesrv &

注意启动时报错如下

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=320m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.
Error: Could not find or load main class com.alibaba.rocketmq.namesrv.NamesrvStartup

不能加载启动类说明配置mq环境变量不对， 改成【步骤四】设置mq环境变量的方式或者参考是不是没有按照【步骤三】来设置来排查问题，当然也可以参考链接分析这个问题

点击打开链接

再次启动报如下错误

java.lang.ExceptionInInitializerError
	at com.alibaba.rocketmq.namesrv.NamesrvStartup.main0(NamesrvStartup.java:103)
	at com.alibaba.rocketmq.namesrv.NamesrvStartup.main(NamesrvStartup.java:51)
Caused by: java.lang.RuntimeException: InetAddress java.net.InetAddress.getLocalHost() throws UnknownHostException
See http://docs.aliyun.com/cn#/pub/ons/faq/exceptions&unknown_host for further details.
	at com.alibaba.rocketmq.common.MixAll.localhost(MixAll.java:433)
	at com.alibaba.rocketmq.common.MixAll.(MixAll.java:67)
	... 2 more
Caused by: java.net.UnknownHostException: nginx57: nginx57: Name or service not known
	at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
	at com.alibaba.rocketmq.common.MixAll.localhost(MixAll.java:429)
	... 3 more
Caused by: java.net.UnknownHostException: nginx57: Name or service not known
	at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
	... 4 more

这个问题是由于/etc/sysconfig/network 中的记录的hostname和/etc/hosts中的主机名绑定不一致造成的改成一样的就行如图所示：

network文件配置

NETWORKING=yes
HOSTNAME=nginx57

hosts文件配置

127.0.0.1  nginx57 
::1        localhost localhost.localdomain localhost7 localhost7.localdomain7

再次重新启动启动成功

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=320m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.
The Name Server boot success. serializeType=JSON

6：启动 mqbroker

nohup sh mqbroker -n localhost:9876 autoCreateTopicEnable=true &

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=320m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.
Java HotSpot(TM) 64-Bit Server VM warning: Cannot open file /root/tmpfs/logs/gc.log due to No such file or directory
The broker[nginx57, 192.168.100.57:10911] boot success. serializeType=JSON and name server is localhost:9876

7：查看是否启动正常

ps aux | grep java

root      7894  0.1  1.5 6327268 127820 pts/0  Sl   Jun27   2:12 /usr/local/jdk1.8.0_131/bin/java -server -Xms4g -Xmx4g -Xmn2g -XX:PermSize=128m -XX:MaxPermSize=320m -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8 -XX:+DisableExplicitGC -verbose:gc -Xloggc:/root/rmq_srv_gc.log -XX:+PrintGCDetails -XX:-OmitStackTraceInFastThrow -Djava.ext.dirs=/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../lib -cp .:/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../conf:.:/usr/local/jdk1.8.0_131/lib/tools.jar:/usr/local/jdk1.8.0_131/lib/dt.jar com.alibaba.rocketmq.namesrv.NamesrvStartup
root      8174 36.0  7.3 6313384 593116 pts/0  Sl   14:25   7:18 /usr/local/jdk1.8.0_131/bin/java -server -Xms4g -Xmx4g -Xmn2g -XX:PermSize=128m -XX:MaxPermSize=320m -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8 -XX:+DisableExplicitGC -verbose:gc -Xloggc:/root/tmpfs/logs/gc.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:-OmitStackTraceInFastThrow -XX:+AlwaysPreTouch -Djava.ext.dirs=/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../lib -cp .:/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../conf:.:/usr/local/jdk1.8.0_131/lib/tools.jar:/usr/local/jdk1.8.0_131/lib/dt.jar com.alibaba.rocketmq.broker.BrokerStartup -n localhost:9876 autoCreateTopicEnable=true

8：测试

测试我是照着网上网友的给的测试项目导入到eclipse中直接拿来测试的 将里边的地址改成自己搭建的mq地址就行

http://download.csdn.net/download/tianwei7518/8138705

在测试过程中碰见的问题如下

No route info of this topic TopicTest1

这个问题我出现的原因是没有关闭 安装rocketMq服务器的防火墙，但是貌似有很多原因都会导致这个问题具体可参链接

https://github.com/alibaba/RocketMQ/issues/44

测试成功