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Configuring Tomcat as Service

Configuring Tomcat as Service

  • Till now we are starting or stopping the tomcat instance from the home through the catalina script.
  • We will not be able to start this through service or systemctl
  • In the previous sessions you might have seen that we have started this through service but it is a custom script written by me
  • Apart from that we can't directly use tomcat through service
  • Now let us see how to accomplish this.
  • For this we should have jvsc package installed on our CentOS/Redhat machine.
  • This package will help us to run the java services as daemons or services.
    • Install through YUM
     # yum install jsvc -y
    • If the packages are not available then we need to download and install from the source.
    NOTE: Please ensure that you have configured you JAVA_HOME before proceeding with the below.
     # wget http://www-eu.apache.org/dist//commons/daemon/source/commons-daemon-1.0.15-src.tar.gz
 # tar -xzvf commons-daemon-1.0.15-src.tar.gz
 # cd commons-daemon-1.0.15-src/src/native/unix
 # echo $JAVA_HOME
 # make
 # ./jsvc -help
  • Now we should have tomcat user and apache
# useradd tomcat
# groupadd apache
# usermod -G apache tomcat
  • Change the owner and group of the $CATALINA_HOME
Before doing this be sure tomcat is not running. Stop if it is running
# cd /opt
# chown -R tomcat:apache tomcat8
  • We need to create a file where our ENVIRONMENT variables can be setup for tomcat
# vi /etc/sysconfig/tomcat

CATALINA_HOME=/opt/tomcat8
JAVA_HOME=/opt/jdk8
JSVC=/usr/share/jsvc-src/commons-daemon-1.0.15-src/src/native/unix
  • Now we need to create a service file for tomcat
# vi /usr/lib/systemd/system/tomcat.service

[Unit]
Description=Tomcat WebServer
After=syslog.target network.target

[Service]
Type=forking
User=tomcat
EnvironmentFile=/etc/sysconfig/tomcat
ExecStart=/opt/tomcat8/bin/catalina.sh start
ExecStop=/opt/tomcat8/bin/catalina.sh stop

[Install]
WantedBy=multi-user.target
  • Enable the tomcat service
# systemctl enable tomcat.service
  • Start Tomcat
# systemctl start tomcat.service

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