Install kafka statndalone.

installKafkaStandalone.sh

#!/bin/bash
# This script install kafka 2.2.0 
# on a centos 7 machine

## RUN AS SUDO
if [[ $EUID -gt 0 ]]
then 
  echo "Please run as root/sudo"
  exit 1
fi
#  Install dependencies
yum install java-11-openjdk wget 
# Download and untar kafka
wget https://www-eu.apache.org/dist/kafka/2.2.0/kafka_2.12-2.2.0.tgz
tar xzvf kafka_2.12-2.2.0.tgz -C /opt
cd /opt/ || exit
ln -s kafka_2.12-2.2.0 kafka

# Create a new user to run kafka
# (for security kafka should not run as a privilegied user)
useradd kafka
chown -R kafka:kafka kafka*

# Create the systemd services (zookeeper and kafka)
cat > /etc/systemd/system/zookeeper.service <<EOF
[Unit]
Description=zookeeper 
After=syslog.target network.target 
[Service] 
Type=simple 
User=kafka 
Group=kafka 
ExecStart=/opt/kafka/bin/zookeeper-server-start.sh /opt/kafka/config/zookeeper.properties
ExecStop=/opt/kafka/bin/zookeeper-server-stop.sh 
[Install] 
WantedBy=multi-user.target
EOF

cat > /etc/systemd/system/kafka.service <<EOF
[Unit]
Description=Apache Kafka 
Requires=zookeeper.service 
After=zookeeper.service 
[Service] 
Type=simple 
User=kafka 
Group=kafka 
ExecStart=/opt/kafka/bin/kafka-server-start.sh /opt/kafka/config/server.properties 
ExecStop=/opt/kafka/bin/kafka-server-stop.sh 
[Install] 
WantedBy=multi-user.target
EOF
# Enable and start the services: 
systemctl daemon-reload
systemctl enable zookeeper.service
systemctl enable kafka.service
systemctl start zookeeper service
systemctl start kafka service
firewall-cmd --permanent --zone=public --add-port=9092/tcp
firewall-cmd --reload