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The purpose of building a CI/CD pipeline is to automate steps in software delivery process

The tools we would be using to build a CI/CD pipeline

AWS

1. Create Security Groups
2. Launch AWS EC2 instances
3. Allocate each AWS EC2 instance a pulblic ip address

OS

1. Change server hostname and SSH timeout for all servers
2. Create users
3. Add uses to necessary groups
4. Grant sudo access to ansibleadm user
5. Genetate SSH keys for users
6. Copy SSH keys over to necessary servers
7. Enable yum repositories
8. Install packages

Github

1. Get jenkinsadm SSH key from Jenkins host
2. Copy jenkinsadm SSH key from Jenkins host to Github
3. Fork "helloworld" repo

Docker

1. Create a Access Tokens
2. Create a repository
3. Connect Docker host to Docker Hub
4. Pull Tomcat 8.5 Docker image
5. Run a Docker container using Tomcat 8.5 image
6. Check if Docker container is running
7. Create a Docker image out of the running container
8. Push created Docker image to Docker Hub
9. Create a directory with appropriate permissions to store Java artifacts

Ansible

1. Create a diretory for Ansible
2. Create an Ansible skeleton role
3. Create a hosts directory
4. Create a hosts file in hosts directory with contents of this file
5. Create an Ansible Playbook named docker-container.yml with contents of this file
6. Give ansible folder and its contents the appropriate owners

Jenkins

1. Login to jenkins
2. Configure Maven plugin
3. Configuring Github plugin
4. Configuring Github webhook trigger
5. Configure Publish Over SSH plugin
6. Copy SSH keys to /var/lib/jenkins/.ssh

Pipeline

1. Start a new project
2. Configure the project
3. Run the build manually
4. Trigger an automatic build