Application Server / Web server

1. Apache-Tomcat

2. Jboss

3. Nginx

4. Glass-fish...etc

Setup
=====

1. Download apache tomcat software and Extract it.
    - https://tomcat.apache.org/download-10.cgi
    - wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.0.27/bin/apache-tomcat-10.0.27.tar.gz
    - tar -xvzf apache-tomcat-10.0.27.tar.gz

2. change port number in 
    - vi /apache-tomcat-10.0.27/conf/server.xml

       <Connector port="8181" protocol="HTTP/1.1"
                    connectionTimeout="20000"
                    redirectPort="8443" />
Note:- Jenkins also running on 8080 port by default. we can't run multiple applications on single port.


3. Create an account in tomcat under manager app
    - vi /apache-tomcat-10.0.27/conf/tomcat-users.xml

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


Note:- 
Please change the allow attribute value in the context.xml file, present in webapps/manager/META-INF folder.
Old configuration
<Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
change to new Configuration

<Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="\d+\.\d+\.\d+\.\d+" />
This will allow access to manager remotely from all IP addresses for login. Further you won't get 403 access denied page

4. start apache-tomcat
    - go to cd /apache-tomcat-10.0.27/bin/
    - ./startup.sh (or) bash startup.sh
    - ./shutdown.sh

5. Verify tomcat by giving http://3.91.178.105:80 in the browser.

Tomcat Integration With Jenkins

1. Install Jenkins in ec2-instance

2. Install Deploy to container plugin 

3. Create a deploy job and configure in post-build actions

WAR/EAR files: **/*.war
Context path: sample.war
Containers: Tomcat 9.x Remote
Tomcat URL: http://3.91.178.105:8181