Task 4 Create daemon service of tomcat

The simplest possible script I could make for tomcat is this one

# make catalina.sh executable
chmod +x ~/apache-tomcat-9.0.98/bin/catalina.sh 
 
# navigate to systemd services directory
cd /etc/systemd/system
 
# Create new tomcat service file
vi tomcat.service

Add this script

[Unit]
Description=Tomcat Service Daemon
 
[Service]
Type=forking
ExecStart=home/ec2-user/apache-tomcat-9.0.98/bin/catalina.sh start
ExecReload=/home/ec2-user/apache-tomcat-9.0.98/bin/catalina.sh start
ExecStop=/home/ec2-user/apache-tomcat-9.0.98/bin/catalina.sh stop
 
[Install]
WantedBy=multi-user.target

Run these commands afterwards

# Reloading the systemd daemon
systemctl daemon-reload
 
# Enabling and starting tomcat.service
systemctl enable --now tomcat.service
 
# Checking Status of our service
systemctl status tomcat.service

However this isnt sufficient for tomcats full usecase for that you need to add Environment Variables

# Set environment variables (optional but recommended) 
 
# Update with your Java installation path
Environment=JAVA_HOME=/usr/lib/jvm/jre 
 
# Update with your Tomcat PID file path 
Environment=CATALINA_PID=/home/ec2-user/apache-tomcat-9.0.98/temp/tomcat.pid 
 
# Update with your Tomcat installation path 
Environment=CATALINA_HOME=/home/ec2-user/apache-tomcat-9.0.98 
 
# Update with your Tomcat base directory 
Environment=CATALINA_BASE=/home/ec2-user/apache-tomcat-9.0.98 
 
# Customize JVM options 
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'
 

also for security purposes its recommended to use tomcat service as a dedicated tomcat user

after making changes in the file its important to reload systemd daemon with systemctl daemon-reload and restarting the tomat service and check the status.

If everything is working and your tomcat page is displaying on port 8080 it means your tomcat service is successfully working.