05-Apache-Tomcat-Setup.md

Docker Server Setup in Linux VM

Step-1: Create Linux VM

1. Create Ubuntu VM using AWS EC2 (t2.micro)
2. Connect to VM using MobaXterm

Step-2: Install Java In Ubuntu VM

sudo apt-get update  
sudo apt install default-jdk -y
java --version

Step-3: Create a System User

sudo useradd -m -d /opt/tomcat -U -s /bin/false tomcat

Step-4: Install Tomcat

wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.1.26/bin/apache-tomcat-10.1.26.tar.gz -O /tmp/tomcat-10.tar.gz
sudo -u tomcat tar -xzvf /tmp/tomcat-10.tar.gz --strip-components=1 -C /opt/tomcat

Step-5: Create a Systemd Service File for Tomcat

[Unit]
Description=Apache Tomcat
After=network.target

[Service]
Type=forking

User=tomcat
Group=tomcat

Environment=JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
Environment=CATALINA_PID=/opt/tomcat/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

ExecReload=/bin/kill $MAINPID
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

Step-6: Save the file and exit

:wq

Step-7: Reload the systemd manager configuration

sudo systemctl daemon-reload

Step-8: To run Tomcat now and make the service run upon reboot

sudo systemctl enable --now tomcat

Step-9: Verify Tomcat service

sudo systemctl status tomcat

Step-10: Open your web browser

http://YOUR_SERVER_IP_ADDRESS:8080 

Step-11: To remove the restriction on the Host Manager

Path: vi /opt/tomcat/webapps/manager/META-INF/context.xml

<Valve className="org.apache.catalina.valves.RemoteAddrValve"
allow=".*" />

Step-12: Configure Tomcat

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

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

Step-13: Restart Tomcat

cd /bin

./shutdown.sh
./startup.sh