Guide to Downloading, Configuring Tomcat, and Integrating with Jenkins

Downloading and Configuring Tomcat:

Download Tomcat:

Search for the latest version of Tomcat on Google and obtain the download link. For example, you can find the link at https://dlcdn.apache.org/tomcat/tomcat-10/v10.1.19/bin/apache-tomcat-10.1.19.tar.gz.
Navigate to Opt Directory:
```
 sudo su -
 cd /opt
```

Download and Extract Tomcat:

 wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.1.19/bin/apache-tomcat-10.1.19.tar.gz
 tar -xvzf apache-tomcat-10.1.19.tar.gz

Rename Tomcat Directory:
```
 mv apache-tomcat-10.1.19 tomcat
```
Start Tomcat Server:
```
 cd /opt/tomcat/bin
 ./startup.sh
```
Access Tomcat Manager:

Open a web browser and navigate to public_ip:8080. Ensure that port 8080 is open in the security group of your instance.
Update Context Configuration:

After receiving a 403 error when accessing the manager app, update the context.xml files:
```
 find / -name context.xml
 vi /opt/tomcat/webapps/host-manager/META-INF/context.xml
 vi /opt/tomcat/webapps/manager/META-INF/context.xml
```
Comment out the lines containing <Valve class ...> by adding  at the end.

Configure Users for Manager App:

 cd /opt/tomcat/conf/
 vi tomcat-users.xml

Add the following users:

 <role rolename="manager-gui"/>
 <role rolename="manager-script"/>
 <role rolename="manager-jmx"/>
 <role rolename="manager-status"/>
 <user username="admin" password="admin@4253" 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"/>

Restart Tomcat:

Create symbolic links for startup and shutdown scripts:
```
 ln -s /opt/tomcat/bin/startup.sh /usr/local/bin/tomcatup
 ln -s /opt/tomcat/bin/shutdown.sh /usr/local/bin/tomcatdown
```
You can now start and stop Tomcat using tomcatup and tomcatdown.

Integrating Tomcat with Jenkins:

Install "Deploy to container" Plugin:
- Log in to Jenkins UI.
- Navigate to Manage Jenkins > Manage Plugins > Available.
- Search for "Deploy to container" and install it without restarting.
Add Credentials:
- Go to Credentials > System > Global credentials (unrestricted) > Add credentials.
- Choose Username with password.
- Enter the following details:
  - Username: deployer
  - Password: (Provide the password)
  - ID: tomcat_deployer
  - Description: Use this credentials to deploy artifacts on Tomcat server
Create Jenkins Job:
- Name: DemoDeployOnTomcat
- Select Maven Project.
- SCM: Git (Add your repository URL)
- Build:
  - Root POM: pom.xml
  - Goals and options: clean install

Post Build Actions:
- Deploy war/ear to container
  - WAR/EAR files: **/*.war (Artifact built by Maven)
  - Containers: Tomcat 9.x Remote
    - Credentials: Choose the credentials added earlier
    - Tomcat URL: http://public_ip:8080

Build Jenkins Job:

Trigger the Jenkins job to build the project.
Verify Deployment:
- Go to the Tomcat server's manager app.
- Navigate to "List apps" and verify the deployed web application.

Following these steps will ensure the smooth setup and integration of Tomcat with Jenkins, allowing for efficient deployment of artifacts.

Guide to Downloading, Configuring Tomcat, and Integrating with Jenkins

Table of contents

Downloading and Configuring Tomcat:

Integrating Tomcat with Jenkins: