Deployment on Kubernetes Cluster using Jenkins CI/CD Project

Whole Project Code Available Here

This Repo is to Teach You Each Tool/Technology and How to Implement the Whole Project Step by Step

Prerequisites/tools needed to work on this project.

• AWS
• Containers
• Docker
• Kubernetes
• Jenkins
• Ansible

We will have a deployment over a Kubernetes cluster using Jenkins CI/CD pipeline,
in this project, we are taking the help of various DevOps tools like GitHub, Jenkins,
Ansible and a Kubernetes cluster(2 nodes).

We will also learn about Kubernetes to know about this deployment and services and we
will write Ansible playbooks with it, we will also write Dockerfile.

Agenda

• When the developer writes a Docker file, he pushes it to the GitHub repository
  so whenever there is a new commit to the GitHub repo When the new code arrives it
  Notifies Jenkins via a webhook, and Jenkins starts the pipeline.

• Jenkins pulls all the code from the GitHub repository Once it's completed, it will
  ssh to the ansible server so when a developer pushes a docker file it accesses the
  Ansible server and starts running the image.

• When it gets the docker file it starts building the image based on the docker file It
  tags it, and once tagged it pushes to the Docker hub and the second task of the Ansible
  Server is, it will ssh to our Kubernetes cluster server, which will evaluate and ansible
  will execute the playbook.

• It runs the kubectl command on our Kubernetes cluster(web app) and it tries to get the
  latest image from the docker registry .It will pull from the docker hub and it will start
  building the image, it will build a container and that container should be available to
  us using an node IP and a port which we specified in the Service.yaml

• We're going to start by writing Service.yaml and hand it over to the Kubernetes cluster
  So this is the whole scenario in simple terms was going to achieve a Kubernetes deployment

• The Jenkins CI/CD pipeline uses various tools We use Linux commands, Jenkins, and Docker
  and you need to have a Dockerhub account, so once Ansible Server builds a Docker image
  based on the Docker file, we push it to the Docker Hub.

• So we need to log in to Docker Hub here so we can easily push the latest image so what
  we're trying to accomplish here is we have the latest image and we also maintain a
  version based on the build

• It builds v1, it contains a fresh image, If the second time it builds another image v2
  so that the second contains the latest image, we are performing a version, also, we have
  to separate the latest image.

Project is divided into 6 parts

• Server Setup
• Dockerfile - Configure Webhook - Trigger Jenkins Job - git
• Transfer & Execute files on remote server using SshAgent
• Build docker Images using Dockerfile - Tag docker images
• Complete Declarative CI/CD Pipelines in Jenkins Project - Push Images to DockerHub
• Complete Deployment on Kubernetes cluster using jenkins CI/CD

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