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Document for Single Node Stack, Means (Web Server, App Server & DB Server on single node)

Step 1 : Db Server Setup.

1. Install DB Server

# yum install mariadb-server -y

2. Start MariaDB Service

# systemctl enable mariadb
# systemctl start mariadb

3. Create DB and Create users to access DB.

Create a file student.sql

# vim student.sql

Copy the following content into that file.

create database if not exists studentapp;
use studentapp;
CREATE TABLE if not exists Students(student_id INT NOT NULL AUTO_INCREMENT,
	student_name VARCHAR(100) NOT NULL,
        student_addr VARCHAR(100) NOT NULL,
	student_age VARCHAR(3) NOT NULL,
	student_qual VARCHAR(20) NOT NULL,
	student_percent VARCHAR(10) NOT NULL,
	student_year_passed VARCHAR(10) NOT NULL,
	PRIMARY KEY (student_id)
);
grant all privileges on studentapp.* to 'student'@'%' identified by 'student@1';
flush privileges;

After that load this file to mysql.

# mysql < student.sql

Step 2 : App Server Setup. (Tomcat)

1. Install Java

# yum install java -y

2. Download Tomcat and extract it

# cd /root
# wget -O- https://archive.apache.org/dist/tomcat/tomcat-9/v9.0.6/bin/apache-tomcat-9.0.6.tar.gz | tar -xz

3. Configure Tomcat

Download war and jar files

# cd /root/apache-tomcat-9.0.6
# rm -rf webapps/*
# wget https://github.com/cit-aliqui/APP-STACK/raw/master/student.war -O webapps/student.war

# wget https://github.com/cit-aliqui/APP-STACK/raw/master/mysql-connector-java-5.1.40.jar -O lib/mysql-connector-java-5.1.40.jar

Configure context.xml for DB connection.

Open conf/context.xml and add the following content just before the last line.

<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
               maxActive="50" maxIdle="30" maxWait="10000"
               username="student" password="student@1"
               driverClassName="com.mysql.jdbc.Driver"
               url="jdbc:mysql://10.142.0.7:3306/studentapp"/>

Note: IP 10.142.0.7 is DB server IP address, If you are using same host then give the IP address of that host, but not localhost

4. Start your tomcat

# /root/apache-tomcat-9.0.6/bin/startup.sh

Step 3 : Web Server Setup (HTTPD)

1. Install web server

# yum install httpd httpd-devel gcc -y

2. Download ModJK and comnpile it

# cd /root
# wget -O- http://www-us.apache.org/dist/tomcat/tomcat-connectors/jk/tomcat-connectors-1.2.43-src.tar.gz | tar -xz
# cd /root/tomcat-connectors-1.2.43-src/native
# ./configure --with-apxs=/usr/bin/apxs
# make 
# make install

3. Create ModJK confif files

Create mod-jk.conf

# cat /etc/httpd/conf.d/mod-jk.conf
LoadModule jk_module modules/mod_jk.so

JkWorkersFile conf.d/worker.properties
JkMount /student local
JkMount /student/* local

# Add following lines only if you want to redirect, Also change the IP address of URL.
RewriteEngine On
RewriteRule ^/$ http://35.231.223.147/student

Create worker.properties file

# cat /etc/httpd/conf.d/worker.properties 
worker.list=local
worker.local.host=localhost
worker.local.port=8009

4. Restart Web Server.

# systemctl enable httpd
# systemctl start httpd