Blue/Green Deployment Using Jenkins

Capstone project for Udacity Cloud DevOps Nanodegree

This project borrows ideas (and some bash scripts 😉)from courses in the Nanodegree program

STEPS

• Create an EC2 instance
• Clone this repo because the scripts install needed packages.
• In templates directory, create CloudFormation stack using:

  aws cloudformation create-stack --stack-name eks-cluster --region us-west-2 --template-body file://aws-eks-.yml --parameters file://params.json --capabilities CAPABILITY_IAM
  

• Alternatively you can install and use eksctl, you can use the cluster.yaml by running:

  eksctl create cluster -f cluster.yaml
  

• When the EKS Cluster is complete, in AWS EKS Dashboard add a Managed Node Group, wait for it to provision.
• Configure EKS cluster with EC2 instance using this command:

  aws eks update-kubeconfig --name zetacluster
  

  Remember the ClusterName variable in our CloudFormation stack?, its value is what we add there not the --stack-name.
• Copy role arn from cloudformation stack outputs into templates/aws-auth.yml file.
• Configure aws-auth.yml file in order to attach worker nodes to EKS cluster by running:

  kubectl apply -f aws-auth.yml
  

• Deploy initial code to Kubernetes cluster and pods using blue deployment in the deploy directory

  kubectl apply -f blue.yml
  

• With blue deployment done, you can create the continuous pipeline.
• Configure AWS and Docker globally on Jenkins using the pipeline-aws plugin. If AWS is not configured properly, the pipeline will fail.

TEST

• Go to Load balancer in EC2 and select specific load balancer. Copy provided DNS and open it in chrome.
• Alternatively, DNS can also be obtained by typing kubectl get svc in command line.
• kubectl get pods let's you see the pods
• kubectl get nodes show you the nodes

Known issues

• A notable resource is this question from StackOverflow regarding pylint.