How To Install the Apache on Ubuntu
To follow the steps below, you need to have Java and Tomcat installed.
Installing Apache
sudo apt update
sudo apt install apache2
Access http://localhost to confirm that the software is running properly.
Setting Up Virtual Hosts
Create the directory for java-school.net, using the -p flag to create any necessary parent directories:
sudo mkdir -p /var/www/java-school.net/html
Assign ownership of the directory:
sudo chown -R $USER:$USER /var/www/java-school.net/html
Create a sample index.html:
sudo nano /var/www/java-school.net/html/index.html
<html> <body> Welcome to java-school.net </body> </html>
Make a new virtual host file at /etc/apache2/sites-available/java-school.net.conf:
sudo nano /etc/apache2/sites-available/java-school.net.conf
<VirtualHost 127.0.0.1>
ServerAdmin javaschool@gmail.org
ServerName java-school.net
ServerAlias www.java-school.net
DocumentRoot /var/www/java-school.net/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
Enable the file with a2ensite:
sudo a2ensite java-school.net.conf
Disable the default site defined in 000-default.conf:
sudo a2dissite 000-default.conf
Restart Apache to implement your changes:
sudo service apache2 restart
Access http://127.0.0.1 to confirm that the index.html is running.
Installing Tomcat Connector
sudo apt install libapache2-mod-jk
Open the workers.properties file and modify the workers.tomcat_home and workers.java_home settings. tomcat_home is /etc/tomcat9 if you install tomcat9 using apt install command. java_home can be checked using mvn -v or sudo update-alternatives --config java commands.
sudo nano /etc/libapache2-mod-jk/workers.properties
# # workers.tomcat_home should point to the location where you # installed tomcat. This is where you have your conf, webapps and lib # directories. # workers.tomcat_home=/etc/tomcat9 # # workers.java_home should point to your Java installation. Normally # you should have a bin and lib directories beneath it. # workers.java_home=/usr/lib/jvm/java-11-openjdk-amd64
Add the following to the virtual hosts file:
sudo nano /etc/apache2/sites-available/java-school.net.conf
<VirtualHost 127.0.0.1>
ServerAdmin javaschool@gmail.org
ServerName java-school.net
ServerAlias www.java-school.net
DocumentRoot /var/www/java-school.net/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
JkMount /* ajp13_worker
</VirtualHost>
Open the server.xml file.
sudo nano /etc/tomcat9/server.xml
Uncomment as follows:
<!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
Restart Apache to implement your changes:
sudo service apache2 restart
Restart Tomcat to implement your changes:
sudo service tomcat9 restart
Visit http://127.0.0.1 to see if Tomcat's root application is responding.
Changing the ROOT Application
git clone https://github.com/kimjonghoon/spring-thymeleaf
Edit pom.xml as follows.
<build>
<finalName>spring-thymeleaf</finalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<filesets>
<fileset>
<directory>src/main/webapp/WEB-INF/classes</directory>
</fileset>
<fileset>
<directory>src/main/webapp/WEB-INF/lib</directory>
</fileset>
</filesets>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<!--
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>10.0.0</version>
</plugin>
</plugins>
</build>
-->
mvn clean compile war:inplace
sudo service tomcat9 stop
sudo nano /etc/tomcat9/Catalina/localhost/ROOT.xml
<?xml version="1.0" encoding="UTF-8"?>
<Context
docBase="/home/kim/spring-thymeleaf/src/main/webapp"
reloadable="true">
</Context>
Go to the /var/www/java-school.net/html directory and create symbolic links to the static elements in the Tomcat root application.
cd /var/www/java-school.net/html
ln -s /home/kim/spring-thymeleaf/src/main/webapp/favicon.ico favicon.ico
ln -s /home/kim/spring-thymeleaf/src/main/webapp/static static
Modify the virtual host file so that Apache serves the static elements of the Tomcat root application as follows:
sudo nano /etc/apache2/sites-available/java-school.net.conf
<VirtualHost 127.0.0.1>
ServerAdmin javaschool@gmail.org
ServerName java-school.net
ServerAlias www.java-school.net
DocumentRoot /var/www/java-school.net/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
JkUnMount /favicon.ico ajp13_worker
JkUnMount /static/* ajp13_worker
JkMount /* ajp13_worker
</VirtualHost>
Restart Apache.
sudo service apache2 restart
Restart Tomcat
sudo service tomcat9 restart
Visit http://127.0.0.1 again.
References