How To Install Apache Tomcat In Centos 6

Apache Tomcat is an open-source web server and servlet container developed by the Apache Software Foundation (ASF).

Tomcat implements the Java Servlet and the JavaServer Pages (JSP) specifications from Oracle and provides a "pure Java" HTTP web server surroundings for running the Java codes.

Apache Tomcat includes tools for configuration and management, but can likewise be configured by editing XML configuration files.

Hither is the step past step guide to install Apache Tomcat 9.0 / 8.5 on CentOS 6 / RHEL half dozen.

Prerequisites

Install Java

Tomcat requires to accept a stable release of Java 8 or afterward installed on your machine. You tin either install Oracle JDK or OpenJDK on your machine.

Here I will use OpenJDK.

yum install -y java-1.eight.0 wget

Y'all can also verify Java by issuing the following command.

java -version

Output:

openjdk version "ane.8.0_222" OpenJDK Runtime Environment (build one.8.0_222-b10) OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)

Create a Service Account

For best practise, Tomcat should never be run equally a privileged user (root). So, create a low-privilege user for running the Tomcat service.

useradd -d /opt/tomcat  tomcat

Install Apache Tomcat

Download Apache Tomcat

Download Apache Tomcat from the official website.

                      ### Apache Tomcat nine.0 ###                    wget https://www-us.apache.org/dist/tomcat/tomcat-nine/v9.0.22/bin/apache-tomcat-9.0.22.tar.gz                      ### Apache Tomcat viii.5 ###                    wget https://www-us.apache.org/dist/tomcat/tomcat-eight/v8.5.43/bin/apache-tomcat-8.5.43.tar.gz

Setup Apache Tomcat

Extract the tomcat on to your desired (/opt/tomcat) directory.

tar -zxvf apache-tomcat-*.tar.gz  mv apache-tomcat-*/* /opt/tomcat/  chown -R tomcat:tomcat /opt/tomcat/

Create Init Script

Apache Tomcat can be started and stopped manually by the script which comes with the bundle. But, here, we will utilise the init script to handle information technology.

vi /etc/init.d/tomcat9

Use the beneath information.

          #!/bin/bash # chkconfig: 2345 95 xx # description: This application was adult by me and is tested on this server # processname: my_app # # Tomcat 8 start/finish/status init.d script # Initially forked from: https://gist.github.com/valotas/1000094 # @author: Miglen Evlogiev <fustigate@miglen.com> # # Release updates: # Updated method for gathering pid of the current proccess # Added usage of CATALINA_BASE # Added coloring and additional status # Added check for existence of the tomcat user # Added termination proccess                      #Location of JAVA_HOME (bin files)                    export JAVA_HOME=            /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/                    #Add Java binary files to PATH export PATH=$JAVA_HOME/bin:$PATH          #CATALINA_HOME is the location of the bin files of Tomcat          export CATALINA_HOME=/opt/tomcat/                      #CATALINA_BASE is the location of the configuration files of this instance of Tomcat                    export CATALINA_BASE=            /opt/tomcat/                    #TOMCAT_USER is the default user of tomcat consign TOMCAT_USER=tomcat   #TOMCAT_USAGE is the message if this script is chosen without any options TOMCAT_USAGE="Usage: $0 {\eastward[00;32mstart\e[00m|\east[00;31mstop\e[00m|\e[00;31mkill\e[00m|\e[00;32mstatus\e[00m|\e[00;31mrestart\e[00m}"   #SHUTDOWN_WAIT is wait time in seconds for java proccess to finish SHUTDOWN_WAIT=20   tomcat_pid() {         echo `ps -atomic number 26 | grep $CATALINA_BASE | grep -v grep | tr -due south " "|cut -d" " -f2` }   kickoff() {   pid=$(tomcat_pid)   if [ -n "$pid" ]   and then     repeat -e "\due east[00;31mTomcat is already running (pid: $pid)\e[00m"   else     # Beginning tomcat     echo -e "\e[00;32mStarting tomcat\e[00m"     #ulimit -n 100000     #umask 007     #/bin/su -p -s /bin/sh $TOMCAT_USER         if [ `user_exists $TOMCAT_USER` = "1" ]         so                 /bin/su $TOMCAT_USER -c $CATALINA_HOME/bin/startup.sh         else                 sh $CATALINA_HOME/bin/startup.sh         fi         status   fi   render 0 }   condition(){           pid=$(tomcat_pid)           if [ -n "$pid" ]; then repeat -eastward "\e[00;32mTomcat is running with pid: $pid\e[00m"           else repeat -e "\e[00;31mTomcat is not running\due east[00m"           fi }  terminate() { 	echo -e "\eastward[00;31mTerminating Tomcat\due east[00m" 	impale -nine $(tomcat_pid) }  stop() {   pid=$(tomcat_pid)   if [ -n "$pid" ]   and so     echo -e "\e[00;31mStoping Tomcat\eastward[00m"     #/bin/su -p -due south /bin/sh $TOMCAT_USER         sh $CATALINA_HOME/bin/shutdown.sh       let kwait=$SHUTDOWN_WAIT     count=0;     until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]     do       repeat -n -east "\n\e[00;31mwaiting for processes to leave\e[00m";       slumber 1       let count=$count+1;     done       if [ $count -gt $kwait ]; and so       echo -north -e "\n\e[00;31mkilling processes didn't finish after $SHUTDOWN_WAIT seconds\e[00m"       end     fi   else     repeat -e "\e[00;31mTomcat is non running\e[00m"   fi     return 0 }   user_exists(){         if id -u $i >/dev/null 2>&ane; then         repeat "1"         else                 repeat "0"         fi }   instance $one in 	first) 	  beginning 	;; 	terminate)   	  finish 	;; 	restart) 	  stop 	  start 	;; 	status) 		status 	;; 	impale) 		terminate 	;;		 	*) 		echo -e $TOMCAT_USAGE 	;; esac     exit 0        

Credit: Timothy Hutz.

Set up the script to exist executable.

chmod +x /etc/init.d/tomcat9

Start Apache Tomcat

Commencement the service.

service tomcat9 beginning

Y'all can verify the service running, by default tomcat runs on port no 8080

netstat -antup | grep 8080

Output:

tcp        0      0 :::8080                     :::*                        Listen      1526/java

Enable the Tomcat service to start automatically on system startup.

chkconfig --add together tomcat9  chkconfig tomcat9 on

Firewall

Allow Tomcat spider web awarding requests through the firewall.

iptables -I INPUT -p tcp -m tcp --dport 8080 -j Have  /etc/init.d/iptables salvage

Configure Apache Tomcat Web UI

Tomcat can be managed through the web-manager and virtual host manager. Both Web manager and Host manager are password protected and require username and password to access.

The user with manager-gui and admin-gui function take access to spider web awarding manager and host-manager, respectively. These users and roles are defined in tomcat-users.xml.

vi /opt/tomcat/conf/tomcat-users.xml

Place the following two lines just above the last line.

<role rolename="            admin-gui,manager-gui          "/> <user username="            admin          " countersign="            tomcat          " roles="manager-gui,admin-gui"/>

For security reason, Spider web Director and Host Manager are accessible only from the localhost, i.east., from the server itself.

To access spider web and host managers from the remote arrangement, you lot would demand to add your source network in the let list. To do that, edit the beneath two files.

                      ### Web Managing director ###                    vi /opt/tomcat/webapps/manager/META-INF/context.xml                      ### Host Manager ###                    vi /opt/tomcat/webapps/host-managing director/META-INF/context.xml

Update the beneath line on above files with source IP from which your accessing the web and host Manager. .* will allow anybody to take access to both managers.

allow="127\.\d+\.\d+\.\d+|::i|0:0:0:0:0:0:0:1            |.*          " />

OR

You can as well allow part of your network only. For case: To allow the 192.168.one.0/24 network only, you can use the below values.

permit="127\.\d+\.\d+\.\d+|::ane|0:0:0:0:0:0:0:1            |192.168.1.*          " />

Restart the Tomcat service.

service tomcat9 restart

Access Apache Tomcat

Open up the web browser and point to

http://ip.add.re.ss:8080

You lot would get the Tomcat default page.

Apache Tomcat Default Page

Web Manager: – Login Required. Username: admin, Countersign: tomcat.

Login to Manager App

Here, you can deploy a new awarding, deploy a new application on specified context, list the active or inactive applications, start and stop the spider web applications.

Tomcat Web Application Director

Also, you can check the server status.

Tomcat Server Status

Host Manager: – Login Required. Username: admin, Password: tomcat.

Login to Tomcat Host Manager

Here, you can handle virtual hosts of Tomcat.

Tomcat Virtual Host Managing director

Decision

That'southward All. I promise you lot have learned how to install Tomcat nine on CentOS 6 / RHEL 6. You are at present ready to deploy your first web application. As a security recommendation, consider implementing SSL/TLS for Tomcat

Source: https://www.itzgeek.com/how-tos/linux/centos-how-tos/install-apache-tomcat-7-0-on-rhel-6-centos-6.html

Posted by: turnagethadfice.blogspot.com

Share this post