AWS DevOps Tools — CodePipeline to EKS Complete Overview

A complete guide to AWS DevOps services — CI/CD pipelines, container orchestration, infrastructure as code, monitoring, and security best practices.

The AWS DevOps Ecosystem

AWS provides a complete, integrated suite of DevOps services — from source control to deployment, monitoring, and security. This guide walks you through the essential services and how they work together.

CI/CD Pipeline

AWS CodePipeline

CodePipeline orchestrates your entire release process — from source code to production — automatically.

Source (CodeCommit / GitHub)
    → Build (CodeBuild)
    → Test (CodeBuild)
    → Deploy (CodeDeploy / ECS / EKS)

buildspec.yml — CodeBuild Configuration

CodeBuild uses a buildspec.yml file to define build phases. Here's a production-ready example for building and pushing a Docker image to ECR:

yaml

version: 0.2
 
phases:
  pre_build:
    commands:
      - echo Logging in to Amazon ECR...
      - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $ECR_REGISTRY
 
  build:
    commands:
      - echo Build started on `date`
      - docker build -t $IMAGE_REPO_NAME:$IMAGE_TAG .
      - docker tag $IMAGE_REPO_NAME:$IMAGE_TAG $ECR_REGISTRY/$IMAGE_REPO_NAME:$IMAGE_TAG
 
  post_build:
    commands:
      - docker push $ECR_REGISTRY/$IMAGE_REPO_NAME:$IMAGE_TAG
      - echo Writing image definitions file...
      - printf '[{"name":"app","imageUri":"%s"}]' $ECR_REGISTRY/$IMAGE_REPO_NAME:$IMAGE_TAG > imagedefinitions.json
 
artifacts:
  files: imagedefinitions.json

Container Services

AWS offers multiple container services depending on your needs:

Service	Use Case
ECS	Simpler container orchestration, AWS-native
EKS	Managed Kubernetes for complex workloads
ECR	Fully managed container image registry
Fargate	Serverless containers — no EC2 to manage

ECS Task Definition

A Task Definition describes how your container should run on ECS:

json

{
  "family": "my-app",
  "networkMode": "awsvpc",
  "requiresCompatibilities": ["FARGATE"],
  "cpu": "256",
  "memory": "512",
  "containerDefinitions": [
    {
      "name": "app",
      "image": "123456789.dkr.ecr.us-east-1.amazonaws.com/my-app:latest",
      "portMappings": [
        {
          "containerPort": 3000,
          "protocol": "tcp"
        }
      ],
      "logConfiguration": {
        "logDriver": "awslogs",
        "options": {
          "awslogs-group": "/ecs/my-app",
          "awslogs-region": "us-east-1",
          "awslogs-stream-prefix": "ecs"
        }
      }
    }
  ]
}

Infrastructure as Code

Terraform on AWS

Terraform is the industry standard for defining AWS infrastructure as code. Here's how to provision a VPC and an EKS cluster:

hcl

# Create the VPC
resource "aws_vpc" "main" {
  cidr_block = "10.0.0.0/16"
 
  tags = {
    Name = "devopsboys-vpc"
  }
}
 
# EKS Cluster using the official module
module "eks" {
  source  = "terraform-aws-modules/eks/aws"
  version = "~> 20.0"
 
  cluster_name    = "devopsboys-cluster"
  cluster_version = "1.29"
 
  vpc_id     = aws_vpc.main.id
  subnet_ids = aws_subnet.private[*].id
 
  eks_managed_node_groups = {
    general = {
      instance_types = ["t3.medium"]
      min_size       = 1
      max_size       = 3
      desired_size   = 2
    }
  }
}

bash

# Initialize, plan, and apply infrastructure
terraform init
terraform plan
terraform apply

Monitoring & Observability

CloudWatch Alarms

Set up automated alerts for critical metrics:

bash

# Create a CPU utilization alarm that triggers when > 80%
aws cloudwatch put-metric-alarm \
  --alarm-name "HighCPU" \
  --alarm-description "Alert when CPU exceeds 80%" \
  --metric-name CPUUtilization \
  --namespace AWS/EC2 \
  --threshold 80 \
  --comparison-operator GreaterThanThreshold \
  --evaluation-periods 2 \
  --period 300 \
  --statistic Average \
  --alarm-actions arn:aws:sns:us-east-1:123456789:alert-topic

Cost Optimization Strategies

Reducing AWS spend is a core DevOps skill. Here are the most impactful strategies:

Spot Instances — Up to 90% cheaper for fault-tolerant, stateless workloads
Reserved Instances — 40–60% savings with 1-3 year commitments
S3 Lifecycle Policies — Automatically move old data to cheaper storage tiers
Auto Scaling — Scale in during off-peak hours to eliminate waste

Security Best Practices

Security on AWS follows the principle of least privilege — every service should have only the minimum permissions it needs.

bash

# Create an IAM role with least-privilege access
aws iam create-role \
  --role-name devopsboys-app-role \
  --assume-role-policy-document file://trust-policy.json
 
# Store secrets in Secrets Manager — never hardcode credentials
aws secretsmanager create-secret \
  --name prod/myapp/database \
  --secret-string '{"username":"admin","password":"super-secret"}'
 
# Retrieve secrets at runtime in your application
aws secretsmanager get-secret-value \
  --secret-id prod/myapp/database \
  --query SecretString \
  --output text

Essential AWS CLI Quick Reference

bash

# Connect kubectl to your EKS cluster
aws eks update-kubeconfig --region us-east-1 --name devopsboys-cluster
 
# Authenticate Docker with ECR
aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin 123456789.dkr.ecr.us-east-1.amazonaws.com
 
# Force a new ECS deployment (rolling update)
aws ecs update-service --cluster my-cluster --service my-service --force-new-deployment
 
# List all running ECS tasks in a cluster
aws ecs list-tasks --cluster my-cluster
 
# View recent CloudWatch logs
aws logs tail /ecs/my-app --follow

What to Learn Next

EKS Deep Dive — Cluster autoscaler, IRSA, and Karpenter for node provisioning
AWS CDK — Define infrastructure using TypeScript or Python instead of HCL
AWS Config + GuardDuty — Continuous compliance and threat detection
Service Mesh with App Mesh / Istio on EKS — Advanced traffic management
Cost Explorer + Budgets — Automated cost tracking and alerting

AWS has a service for everything — the key is knowing which tool fits which problem. Master the fundamentals here and the rest becomes much easier to learn.

AWS DevOps Tools — CodePipeline to EKS Complete Overview

The AWS DevOps Ecosystem

CI/CD Pipeline

AWS CodePipeline

buildspec.yml — CodeBuild Configuration

Container Services

ECS Task Definition

Infrastructure as Code

Terraform on AWS

Monitoring & Observability

CloudWatch Alarms

Cost Optimization Strategies

Security Best Practices

Essential AWS CLI Quick Reference

What to Learn Next

Stay ahead of the curve

Related Articles

AWS EKS vs Google GKE vs Azure AKS — Which Managed Kubernetes to Use in 2026?

Build a Complete AWS Infrastructure with Terraform from Scratch (2026)

Build a Complete CI/CD Pipeline with GitHub Actions + ArgoCD + EKS (2026)

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