Manually download unpack Tomcat package

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Topic: How To Install Tomcat on Ubuntu 16.04 Box

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posted on: 10/21/2017 01:28:17 AM

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How To Install Tomcat on Ubuntu 16.04 Box

Prerequisites

Java JDK installed and JAVA_HOME has been set up. Check here to see details.

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posted on: 10/21/2017 01:30:30 AM

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Manually download and unpack the Tomcat package

Step 1) Download the Tomcat package

First go to http://tomcat.apache.org/download-80.cgi, find the tar.gz under Binary Distributions and download it to local Windows machine.

Step 2). Make the folder available

$ sudo mkdir /opt/tomcat
$ cd /opt
$ sudo chmod 777 tomcat

Step 3). Upload the downloaded Tomcat by WinSCP

Copy apache-tomcat-8.5.23.tar.gz onto /opt/tomcat

Step 4). Unzip the package

$ cd /opt/tomcat
$ tar xzf apache-tomcat-8.5.23.tar.gz

The Tomcat content is under folder /opt/tomcat/apache-tomcat-8.5.23

Step 5). Verify it is working

$ cd /opt/tomcat/apache-tomcat-8.5.23
$ ./bin/startup.sh

Using CATALINA_BASE:   /opt/tomcat/apache-tomcat-8.5.23
Using CATALINA_HOME:   /opt/tomcat/apache-tomcat-8.5.23
Using CATALINA_TMPDIR: /opt/tomcat/apache-tomcat-8.5.23/temp
Using JRE_HOME:        /usr/local/java/jdk1.8.0_152
Using CLASSPATH:       /opt/tomcat/apache-tomcat-8.5.23/bin/bootstrap.jar:/opt/
tomcat/apache-tomcat-8.5.23/bin/tomcat-juli.jar
Tomcat started.

Goto the box's browser and use localhost

http://localhost:8080/

Or other machine's browser and use box's ip-address

http://10.11.12.13:8080/

Finally, stop it

$ ./bin/shutdown.sh

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posted on: 10/22/2017 09:52:14 PM

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Configure Tomcat to survive instance reboot

First, create a systemd service file tomcat.service

$ sudo nano /etc/systemd/system/tomcat.service

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=/usr/local/java/jdk1.8.0_152/jre
Environment=CATALINA_PID=/opt/tomcat/apache-tomcat-8.5.23/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat/apache-tomcat-8.5.23
Environment=CATALINA_BASE=/opt/tomcat/apache-tomcat-8.5.23
Environment='CATALINA_OPTS=-Xms128M -Xmx512M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/apache-tomcat-8.5.23/bin/startup.sh
ExecStop=/opt/tomcat/apache-tomcat-8.5.23/bin/shutdown.sh

User=administrator
Group=administrator
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

Then, enable the service (it will auto-start after reboot):

$ sudo systemctl daemon-reload 
$ sudo systemctl enable tomcat

If you want to start the service right now (in this session), type the command

$ sudo systemctl start tomcat
OR
$ sudo systemctl restart tomcat

You can check the status of a given service by

$ sudo systemctl status tomcat

 tomcat.service - Apache Tomcat Web Application Container
   Loaded: loaded (/etc/systemd/system/tomcat.service; enabled; vendor preset: e
   Active: active (running) since Sun 2017-10-22 14:40:10 PDT; 13min ago
  Process: 950 ExecStart=/opt/tomcat/apache-tomcat-8.5.23/bin/startup.sh (code=e
 Main PID: 996 (java)
   CGroup: /system.slice/tomcat.service
           └─996 /usr/local/java/jdk1.8.0_152/jre/bin/java -Djava.util.logging.c

Oct 22 14:40:09 ubuntu systemd[1]: Starting Apache Tomcat Web Application Contai
Oct 22 14:40:10 ubuntu startup.sh[950]: Existing PID file found during start.
Oct 22 14:40:10 ubuntu startup.sh[950]: Removing/clearing stale PID file.
Oct 22 14:40:10 ubuntu startup.sh[950]: Tomcat started.
Oct 22 14:40:10 ubuntu systemd[1]: Started Apache Tomcat Web Application Contain

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posted on: 10/22/2017 10:31:15 PM

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Configure Tomcat's Administrative Users

By default, there is no users who can manage Tomcat through the administrative UI. You can add users by file tomcat-users.xml

$ sudo nano /opt/tomcat/apache-tomcat-8.5.23/conf/tomcat-users.xml

<tomcat-users . . .>
    <user username="admin" password="password" roles="manager-gui,admin-gui"/>
</tomcat-users>

By default, the above defined users can only manage Tomcat through connections coming from the server itself. Since we are installing on a remote machine, you will probably want to remove or alter this restriction. To change the IP address restrictions on these, open the appropriate context.xml files.

For Manager App, type:

$ sudo nano /opt/tomcat/apache-tomcat-8.5.23/webapps/manager/META-INF/context.xml

For Host Manager, type:

$ sudo nano /opt/tomcat/apache-tomcat-8.5.23/webapps/host-manager/META-INF/context.xml

Then comment out the IP address restriction:

<Context antiResourceLocking="false" privileged="true" >
  <!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->
</Context>

To put our changes into effect, restart the Tomcat service:

$ sudo systemctl restart tomcat

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