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Kubernetes on AWS using Kops

1. Launch Linux EC2 instance in AWS (Kubernetes Client) or any linux machine

2. Create and attach IAM role to EC2 Instance.

Kops need permissions to access
  S3
  EC2
  VPC
  Route53
  Autoscaling
  etc..

3. Install Kops on EC2

curl -LO https://github.com/kubernetes/kops/releases/download/$(curl -s https://api.github.com/repos/kubernetes/kops/releases/latest | grep tag_name | cut -d '"' -f 4)/kops-linux-amd64
chmod +x kops-linux-amd64
sudo mv kops-linux-amd64 /usr/bin/kops
kops version

4. Install kubectl

curl -o kubectl https://amazon-eks.s3-us-west-2.amazonaws.com/1.14.6/2019-08-22/bin/linux/amd64/kubectl
chmod +x ./kubectl
mkdir -p $HOME/bin
cp ./kubectl $HOME/bin/kubectl
export PATH=$HOME/bin:$PATH
echo 'export PATH=$HOME/bin:$PATH' >> ~/.bashrc
source $HOME/.bashrc
kubectl version --short --client

5. Create S3 bucket in AWS

S3 bucket is used by kubernetes to persist cluster state, lets create s3 bucket using aws cli Note: Make sure you choose bucket name that is uniqe accross all aws accounts

aws s3 mb s3://cloudtechmasters.ml.k8s --region us-east-1

6. Create hosted zone in AWS Route53

Head over to aws Route53 and create hostedzone
Choose name for example (cloudtechmasters.ml)
Hit create

Note:

Add NS records for the domain where you register the domain

7. Create ssh key pair

This keypair is used for ssh into kubernetes cluster

ssh-keygen

8. Create a Kubernetes cluster definition

kops create cluster --zones=us-east-1a,us-east-1b,us-east-1c --name=cloudtechmasters.ml --state s3://cloudtechmasters.ml.k8s

9. Create kubernetes cluster

kops update cluster --name cloudtechmasters.ml --state s3://cloudtechmasters.ml.k8s --yes

Above command may take some time to create the required infrastructure resources on AWS. Execute the validate command to check its status and wait until the cluster becomes ready

kops validate cluster --state s3://cloudtechmasters.ml.k8s --wait 10m

For the above above command, you might see validation failed error initially when you create cluster and it is expected behaviour, you have to wait for some more time and check again.

10. Check nodes of the cluster

kubectl get nodes

11. Connect to the KOPS Cluster

ssh -i ~/.ssh/id_rsa [email protected]

image

Deploy application

kubectl apply -f deployment.yml
kubectl apply -f service.yml

Goto UI and check output

image

Clean-UP

kops delete cluster --name=cloudtechmasters.ml --state s3://cloudtechmasters.ml.k8s --yes