Tomcat service auto restart script (Systemd/Unit script )

Step 1) Login as root and create tomcat.service file

[root@tomcathost ~]# cd /etc/systemd/system/

[root@tomcathost system]# cat>tomcat.service

[Unit]

Description=tomcat service

After=network.target

[Service]

User=osboxes

Group=osboxes

Type=oneshot

ExecStart=/home/osboxes/instances/poc-tomcat-instance/bin/startup.sh

ExecStop=/home/osboxes/instances/poc-tomcat-instance/bin/shutdown.sh

RemainAfterExit=yes

[Install]

WantedBy=multi-user.target

Step 2) Reload systemctl daemon

[root@tomcathost system]# systemctl daemon-reload

Step 3) Enable tomcat service

[root@tomcathost system]# systemctl enable tomcat.service

Created symlink /etc/systemd/system/multi-user.target.wants/tomcat.service → /etc/systemd/system/tomcat.service.

Step 4) Start tomcat service 

[root@tomcathost ~]# systemctl start tomcat

Step 5) reboot the machine 

[root@tomcathost system]# init 6

Step 6) Check the tomcat jvm process status after machine reboot

[osboxes@tomcathost ~]$ ps -ef | grep java

osboxes      817       1 10 02:47 ?        00:00:07 /home/osboxes/products/jdk/jdk_latest/jre/bin/java -Djava.util.logging.config.file=/home/osboxes/instances/poc-tomcat-instance/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+HeapDumpOnOutOfMemoryError -XX:+UseG1GC -Xloggc:/home/osboxes/logs/poc-tomcat-instance/GC.log -server -d64 -Xms1024m -Xmx1024m -Djava.library.path=/home/osboxes/products/tomcat/tomcat90/lib -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /home/osboxes/products/tomcat/tomcat90/bin/bootstrap.jar:/home/osboxes/instances/poc-tomcat-instance/bin/tomcat-juli.jar -Dcatalina.base=/home/osboxes/instances/poc-tomcat-instance -Dcatalina.home=/home/osboxes/products/tomcat/tomcat90 -Djava.io.tmpdir=/home/osboxes/instances/poc-tomcat-instance/temp org.apache.catalina.startup.Bootstrap start

You can also verify the boot.log 

[root@tomcathost ~]# grep tomcat /var/log/boot.log

         Starting tomcat service...

[  OK  ] Started tomcat service.