CCMS Project 2

CI/CD Pipeline for a Python (Flask) web app.

• Stored in a Docker Hub registry & GitHub repository,
• Running on a Docker (Kubernetes) Network,
• Hosted by an AWS EKS cloud cluster and Integrated through Jenkins.
• Something Jenkins

Continuous Integration

• GitHub webhook notifies Jenkins of a push to main.
• Jenkins then uses an EC2 instance agent for testing and building.
• If unittests pass, docker image is pushed to Docker Hub.

Continuous Deployment

After a successful push to Docker Hub, Jenkins uses SSH to directs Kubernetes to update the cluster.

Local Development

Setup & Run:

docker build . -t ccms-project2-image

docker run -p 5000:5000 --rm --name ccms-project2-container ccms-project2-image

or

export FLASK_APP=app.py
export FLASK_ENV=development
flask run

http://127.0.0.1:5000

AWS EKS

Setup & Run:

eksctl create cluster --name p2 --version 1.19 --region us-east-2 --nodegroup-name standard-nodes --node-type t3.small --nodes 2 --managed --node-ami-family Ubuntu2004

kubectl apply -f kubernetes/nginx-ingress/nginx-ingress-controller.yaml
kubectl apply -f kubernetes/nginx-ingress/flask-deployment.yaml
kubectl apply -f kubernetes/nginx-ingress/flask-service.yaml
kubectl apply -f kubernetes/nginx-ingress/nginx-ingress.yaml

kubectl get svc --namespace=nginx-ingress

View Production (Blue)

curl -i -H "Host: flask.app.com" <cluster server url>

View Development (Green)

curl -i -H "Host: flaskstage.app.com" <cluster server url>

To Switch Versions

kubectl patch service flask-app-svc-stable --patch-file kubernetes/nginx-ingress/patch-file.yaml

curl -i -H "Host: flask.app.com" <cluster server url>