kafka依赖于zookeeper
1.新建zookeeper配置文件：
vim /etc/systemd/system/zookeeper.service
[Unit]
Description=Apache Zookeeper server
Documentation=http://zookeeper.apache.org
Requires=network.target remote-fs.target
After=network.target remote-fs.target
[Service]
Type=simple
ExecStart=/opt/kafka/bin/zookeeper-server-start.sh /opt/kafka/config/zookeeper.properties
ExecStop=/opt/kafka/bin/zookeeper-server-stop.sh
Restart=on-abnormal
User=root
Group=root
[Install]
WantedBy=multi-user.target
2.启动zookeeper
输入命令：
sudo systemctl start zookeeper
sudo systemctl status zookeeper
3.新建kafka配置文件：
vim /etc/systemd/system/kafka.service
[Unit]
Description=Apache Kafka Server
Documentation=http://kafka.apache.org/documentation.html
Requires=zookeeper.service
[Service]
Type=simple
ExecStart=/opt/kafka/bin/kafka-server-start.sh /opt/kafka/config/server.properties
ExecStop=/opt/kafka/bin/kafka-server-stop.sh
Restart=on-abnormal
[Install]
WantedBy=multi-user.target
4.启动kafka
输入命令：
sudo systemctl start kafka
sudo systemctl status kafka
