eks

steps to create EKS

1. Create system level user to access aws account
2. Overall eks setup :
   Provision an EKS cluster --> Deploy worker nodes --> Connect to EKS --> Run/Deploy Kubernetes app

Step 1

Provision an EKS cluster

1. Create IAM role, refer : https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/eks_cluster
2. Get VPC details
3. Create EKS cluster

Step 2

Deploy worker node : https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/eks_node_group

1. Create IAM role
2. Create node groupe

Step 3

Connect to EKS

aws eks --region <region code > update-kubeconfig --name <eks cluster name>

..

addons

To store terraform statefile at s3 , use backendblock terraform { backend "s3" { bucket = "my-terraform-state-bucket" # Your S3 bucket name key = "path/to/my/terraform.tfstate" region = "us-west-2" # Bucket region encrypt = true # Ensure this is enabled for security -- optional dynamodb_table = "my-lock-table" # DynamoDB table for state locking -- optional } }

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Application deployment on EKS

Manual deployment

# Create po in eks 
k run nginx --image=nginx 

# expose pod port 
k port-forward pod/nginx 8080:80

# to check if nginx web server working , from laptop browser hit 
http://localhost:8080/

# To connect/go inside the pod 
k exec -it nginx -- /bin/bash

Deployment using deployment file

create deployment.yaml

apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment labels: app: nginx spec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.14.2 ports: - containerPort: 80

command to creat kubernetes deployment

kubectl apply -f deployment.yaml

Application deployment using helm

1. Create a directoty/repo to store helm chart helm create nginx-chart
2. Helm install - to deploy app helm install nginx-chart .
3. Helm upgrade - to change and apply any deployment config helm upgrade nginx-chart .
4. Helm uninstall - to delete all deployment stacks helm uninstall nginx-chart .