Server Setup:

Update Kafka

vi config/server.properties

advertised.listeners=PLAINTEXT://PUBLIC_IP:9092
log.dirs=/var/log/kafka

Update ZooKeeper

vi config/zookeeper.properties

dataDir=/var/log/zookeeper

Create daemons:

ZooKeeper

sudo vi /etc/systemd/system/zookeeper.service

[Unit]
Description=Apache ZooKeeper Server
Requires=network.target remote-fs.target
After=network.target remote-fs.target

[Service]
Type=simple
User=root
ExecStart=/root/kafka/bin/zookeeper-server-start.sh /root/kafka/config/zookeeper.properties
ExecStop=/root/kafka/bin/zoookeeper-server-stop.sh
Restart=on-failure

[Install]
WantedBy=multi-user.target

Kafka

sudo vi /etc/systemd/system/kafka.service

[Unit]
Description=Apache Kafka Server
Requires=network.target remote-fs.target
After=network.target remote-fs.target zookeeper.service

[Service]
Type=simple
User=root
ExecStart=/root/kafka/bin/kafka-server-start.sh /root/kafka/config/server.properties
ExecStop=/root/kafka/bin/kafka-server-stop.sh
Restart=on-failure

[Install]
WantedBy=multi-user.target