# 启动RocketMq
1. 创建rocketmq-**namesrv**
   ```
   # vim /etc/systemd/system/rocketmq-namesrv.service
   [Unit]
   Description=rocketmq-namesrv
   Documentation=http://mirror.bit.edu.cn/apache/rocketmq/
   After=network.target
   [Service]
   Type=sample
   Environment=JAVA_HOME=/opt/jdk1.8.0_131
   User=root
   ExecStart=/opt/rocketmq-4.4.0/bin/mqnamesrv > /data/rocketmq-4.4.0/logs/mqnamesrv.log 2>&1
   ExecReload=/bin/kill -s HUP $MAINPID
   ExecStop=/bin/kill -s QUIT $MAINPID
   Restart=0
   LimitNOFILE=65536
   [Install]
   WantedBy=multi-user.target
   ```
   
2. 创建broker-master
   ```
   # vim /etc/systemd/system/rocketmq-master.service
   [Unit]
   Description=rocketmq-master
   Documentation=http://mirror.bit.edu.cn/apache/rocketmq/
   After=network.target
   [Service]
   Type=sample
   Environment=JAVA_HOME=/opt/jdk1.8.0_131
   User=root
   ExecStart=/opt/rocketmq-4.4.0/bin/mqbroker -c /opt/rocketmq-4.4.0/conf/broker-master.conf >/data/rocketmq-4.4.0/logs/mqbroker-master.log 2>&1
   ExecReload=/bin/kill -s HUP $MAINPID
   ExecStop=/bin/kill -s QUIT $MAINPID
   Restart=0
   LimitNOFILE=65536
   [Install]
   WantedBy=multi-user.target
   ```
   
3. 创建broker-slave
   ```
   # vim /etc/systemd/system/rocketmq-slave.service
   [Unit]
   Description=rocketmq-slave
   Documentation=http://mirror.bit.edu.cn/apache/rocketmq/
   After=network.target
   [Service]
   Type=sample
   Environment=JAVA_HOME=/opt/jdk1.8.0_131
   User=root
   ExecStart=/opt/rocketmq-4.4.0/bin/mqbroker -c /opt/rocketmq-4.4.0/conf/broker-slave.conf >/data/rocketmq-4.4.0/logs/mqbroker-slave.log 2>&1
   ExecReload=/bin/kill -s HUP $MAINPID
   ExecStop=/bin/kill -s QUIT $MAINPID
   Restart=0
   LimitNOFILE=65536
   [Install]
   WantedBy=multi-user.target
   ```
   
4. 设置开机自启 由于rocketmq有启动顺序依赖，因此要写入rc
   ```
   # vim /etc/rc.d/rc.local
   systemctl start rocketmq-namesrv
   systemctl start rocketmq-master
   systemctl start rocketmq-slave
   ```
   图1设置开机自启   
   ![](https://support.huaweicloud.com/deepexidip-dma/zh-cn_image_0000001528722873.png) 
5. 启动服务 重新加载systemctl配置
   ```
   # systemctl daemon-reload
   ```
   启动顺序namesrv -\> master -\> slave.
   ```
   # systemctl start rocketmq-namesrv && systemctl enable rocketmq-namesrv
   # systemctl start rocketmq-master && systemctl enable rocketmq-master
   # systemctl start rocketmq-slave && systemctl enable rocketmq-slave
   ```
   ![](https://support.huaweicloud.com/deepexidip-dma/public_sys-resources/note_3.0-zh-cn.png)
   如果要停止，顺序与启动顺序相反。
   
6. 检查状态
   ```
   # systemctl status rocketmq-namesrv
   # systemctl status rocketmq-master
   # systemctl status rocketmq-slave
   ```
   图2检查状态   
   ![](https://support.huaweicloud.com/deepexidip-dma/zh-cn_image_0000001477962938.png) 
7. 看到上面结果，说明启动成功。
8. 附加：另一种启动方式 分别启动3个节点的namesrv和broker，启动顺序namesrv ---\> broker。
   启动namesrv
   ```
   # nohup sh /opt/rocketmq-4.4.0/bin/mqnamesrv > /data/rocketmq-4.4.0/logs/mqnamesrv.log 2>&1 &
   ```
   启动broker-master
   ```
   # nohup sh /opt/rocketmq-4.4.0/bin/mqbroker -c /opt/rocketmq-4.4.0/conf/broker-master.conf >/data/rocketmq-4.4.0/logs/mqbroker-master.log 2>&1 &
   ```
   启动broker-slave
   ```
   # nohup sh /opt/rocketmq-4.4.0/bin/mqbroker -c /opt/rocketmq-4.4.0/conf/broker-slave.conf >/data/rocketmq-4.4.0/logs/mqbroker-slave.log 2>&1 &
   ```
   ![](https://support.huaweicloud.com/deepexidip-dma/public_sys-resources/note_3.0-zh-cn.png)
   停止顺序则与启动顺序相反。