Install Tomcat On Amazon Linux

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  1. Remove older version of java and install latest version:
    yum remove java* -y
    sudo yum install java-1.8.0-openjdk.x86_64 -y
  2. Download tomcat packages from https://tomcat.apache.org/download-80.cgi onto /opt on EC2 instance
    # create tomcat directory
    cd /opt
    wget https://archive.apache.org/dist/tomcat/tomcat-8/v8.5.35/bin/apache-tomcat-8.5.35.tar.gz
    tar -xvzf /opt/apache-tomcat-8.5.35.tar.gz
  3. Give executing permissions to startup.sh and shutdown.sh which are under bin.
    chmod +x /opt/apache-tomcat-8.5.35/bin/startup.sh shutdown.sh
  4. Create link files for tomcat startup.sh and shutdown.sh
    ln -s /opt/apache-tomcat-8.5.35/bin/startup.sh /usr/local/bin/tomcatup
    ln -s /opt/apache-tomcat-8.5.35/bin/shutdown.sh /usr/local/bin/tomcatdown
    tomcatup
  5. Access tomcat application from browser on prot 8080
    http://<Public_IP>:8080
  6. Using unique ports for each application is a best practice in an environment. But tomcat and Jenkins runs on ports number 8080. Hence lets change tomcat port number to 8090. Change port number in conf/server.xml file under tomcat home
    cd /opt/apache-tomcat-8.5.35/conf
    # update port number in the "connecter port" field in server.xml
    # restart tomcat after configuration update
    tomcatdown
    tomcatup
  7. Now application is accessible on port 8090. but tomcat application doesnt allow to login from browser. changing a default parameter in context.xml does address this issue#search for context.xml
    find / -name context.xml
  8. Above command gives 3 context.xml files. comment () Value ClassName field on files which are under webapp directory. After that restart tomcat services to effect these changes
    tomcatdown
    tomcatup
  9. Update users information in the tomcat-users.xml file goto tomcat home directory and Add below users to conf/tomcat-user.xml file
    <role rolename="manager-gui"/>
    <role rolename="manager-script"/>
    <role rolename="manager-jmx"/>
    <role rolename="manager-status"/>
    <user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status"/>
    <user username="deployer" password="deployer" roles="manager-script"/>
    <user username="tomcat" password="s3cret" roles="manager-gui"/>
  10. Restart serivce and try to login to tomcat application from the browser. This time it should be Successful

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