DevOps Assembly Lines Task #3

Task Description:

1. Create container image that’s has Jenkins installed using docker file.
2. When we launch this image, it should automatically starts Jenkins service in the container.
3. Deploy a container of this image on top of Kubernetes where we use Kubernetes resources like Pods, ReplicaSet, Deployment, PVC and Service.
4. Create a job chain of job 1, job2, job 3 and job 4 using build pipeline plugin in Jenkins 
5.  Job 1: Pull the Github repo automatically when some developers push repo to Github.
6. Job 2: By looking at the code or program file, Jenkins should automatically start the respective language interpreter installed image container to deploy code on top of Kubernetes ( eg. If code is of PHP, then Jenkins should start the container that has PHP already installed )
7. Expose your pod so that testing team could perform the testing on the pod.
8. Make the data to remain persistent ( If server collects some data like logs, other user information )
9. Job 3: Test your app if it is working or not.
10. Job 4: if app is not working , then send email to developer with error messages and redeploy the application after code is being edited by the developer.

Creating Jenkins image:

• Create a text file named 'Dockerfile'.

• Now to create an image with it:

>> docker build -t jenkinsimage:v1 ws/

Running Jenkins container on Kubernetes:

YAML code to create a container with jenkins running on port no. 8080:

Now to start the Jenkins container using this file:

>> kubectl apply -f jenkins_pod.yml

>> Kubectl get all

This will deploy the jenkins pod successfully.

Now to get the IP where the jenkins service is running:

>> minikube ip

Now, to use jenkins web UI use minkubeIP:port_no.

To get your jenkins password to use web UI:

>> kubectl logs pod_name

In the logs we'll find the jenkins password.

To proceed further we will need to install git, email extension build pipeline plugins in Jenkins.

Creating Repository on GitHub:

• git clone https://github.com/suchitrasaksena/DevOps_task3.git

After creating the files:

• git add .
• git commit -m "first commit"
• git push -u origin master
• The repository will be created successfully.

The repository is successfully created.

Configuring Jenkins:

Job 1:

This job will automatically download the GitHub repository whenever developer pushes any changes.

Job 2:

This job will automatically run after successful completion of job 1 and start the apache pod to deploy the website.

YML file to create service for apache webserver:

YML file to create PVC for apache webserver:

YML file to create Deployment for apache webserver:

Job 3:

This job will run after successful completion of job 2 and will check if the deployed website has any errors.

Job 4:

This job will run after job 3 to notify the developer if the website has any errors via mail.

All the jobs execute successfully, here's the build Pipeline view:

The task is successfully completed, and the website is deployed successfully.

Thanks for reading, feel free to leave your suggestions to improve this setup.