1.AWS DevOps Fundamentals
What is DevOps?- A methodology that combines development (Dev) and operations (Ops) to automate software delivery, improve collaboration, and enhance efficiency.
- Key focus areas: CI/CD, Infrastructure as Code (IaC), Monitoring, Security, and Automation.
| Category | Service | Purpose |
| Version Control | AWS CodeCommit | Managed Git repository |
| Build & Test | AWS CodeBuild | CI service for building & testing code |
| Deployment | AWS CodeDeploy | Automates deployments |
| CI/CD Orchestration | AWS CodePipeline | Automates CI/CD workflows |
| Infrastructure as Code (IaC) | AWS CloudFormation, Terraform | Automates resource provisioning |
| Monitoring | Amazon CloudWatch | Logs, metrics, and alerts |
| Security & Compliance | AWS IAM, AWS Secrets Manager | Identity management & secret storage |
| Configuration Management | AWS Systems Manager, Ansible | Manages and automates configurations |
2.Source Control & AWS CodeCommit
AWS CodeCommit- Fully managed Git-based version control system.
- Securely stores code repositories.
- Integrated with AWS IAM for fine-grained access control.
- Use feature branching for better collaboration.
- Implement branch protection rules to prevent unauthorized commits.
- Use Git Hooks for automation.
git clone <repo-url> # Clone repository
git checkout -b <branch-name> # Create a new branch
git add . # Stage changes
git commit -m "message" # Commit changes
git push origin <branch> # Push changes
git pull origin <branch> # Get latest changes
3.Continuous Integration (CI) with AWS CodeBuild
AWS CodeBuild- Fully managed continuous integration service.
- Builds and tests code in temporary containers.
- Supports multiple languages and dependency management tools.
version: 0.2
phases:
install:
runtime-versions:
nodejs: 14
pre_build:
commands:
- echo Installing dependencies...
- npm install
build:
commands:
- echo Running tests...
- npm test
post_build:
commands:
- echo Build complete!
- Automate unit tests and code quality checks.
- Use AWS Secrets Manager for storing credentials securely.
- Store build artifacts in Amazon S3 for future deployments.
4.Continuous Deployment (CD) with AWS CodeDeploy
AWS CodeDeploy- Automates application deployments to EC2, Lambda, ECS, or on-premises servers.
- Supports Blue-Green Deployments and Rolling Updates.
version: 0.0
os: linux
files:
- source: /app
destination: /var/www/app
hooks:
BeforeInstall:
- location: scripts/pre-install.sh
timeout: 300
AfterInstall:
- location: scripts/post-install.sh
timeout: 300
- Use Blue-Green Deployments to minimize downtime.
- Monitor deployments using Amazon CloudWatch Logs.
- Automate rollback strategies for failed deployments.
5.AWS CodePipeline – CI/CD Orchestration
AWS CodePipeline- Automates the software release process.
- Connects AWS CodeCommit, CodeBuild, and CodeDeploy.
- Supports third-party tools like GitHub, Jenkins, and Bitbucket.
| Stage | Purpose |
| Source | Pull code from AWS CodeCommit or GitHub |
| Build | Compile and test code using AWS CodeBuild |
| Deploy | Deploy application using AWS CodeDeploy |
| Approval | Manual approval before production deployment |
- Use Amazon S3 versioning to keep track of artifacts.
- Integrate with AWS Lambda for custom workflows.
- Use manual approvals for production deployments.
6.Infrastructure as Code (IaC) with AWS Cloud Formation & Terraform
AWS Cloud Formation- AWS-native IaC tool to define resources in YAML/JSON.
AWSTemplateFormatVersion: '2010-09-09'
Resources:
MyS3Bucket:
Type: "AWS::S3::Bucket"
Properties:
BucketName: my-iac-bucket
- Declarative syntax to define AWS resources.
- Uses state files for tracking infrastructure changes.
provider "aws" {
region = "us-east-1"
}
resource "aws_instance" "web" {
ami = "ami-123456"
instance_type = "t2.micro"
}
- Use parameterized templates for reusability.
- Implement automated testing before applying changes.
- Store templates in AWS CodeCommit for version control.
7.Security & Compliance in AWS DevOps
AWS Security Best Practices| Security Feature | Purpose |
| AWS IAM | Role-based access control |
| AWS Secrets Manager | Store API keys, database passwords securely |
| AWS KMS | Encrypt sensitive data |
| AWS WAF | Protects against web attacks |
| AWS Config | Tracks AWS configuration changes |
- Use IAM roles instead of hardcoded AWS credentials.
- Enable multi-factor authentication (MFA) for users.
- Implement least privilege access for users & services.
8.Monitoring & Logging in AWS
AWS Monitoring & Logging Tools| Tool | Purpose |
| Amazon CloudWatch | Collect logs & metrics |
| AWS X-Ray | Distributed tracing for debugging |
| AWS Config | Compliance auditing |
| AWS CloudTrail | Track AWS API calls |
| AWS GuardDuty | Threat detection |
{
"AlarmName": "HighCPUUsage",
"MetricName": "CPUUtilization",
"Namespace": "AWS/EC2",
"Statistic": "Average",
"Period": 300,
"EvaluationPeriods": 2,
"Threshold": 80,
"ComparisonOperator": "GreaterThanThreshold",
"AlarmActions": ["arn:aws:sns:us-east-1:123456789012:NotifyMe"]
}
- Use Amazon CloudWatch Logs Insights to analyze logs.
- Enable AWS Config to track compliance violations.
- Implement AWS Lambda functions for automated alerts.
9.Exam Tips & Study Guide
Key Topics to Focus On:- CI/CD Pipelines using AWS CodePipeline.
- Infrastructure as Code (IaC) with CloudFormation & Terraform.
- Security & Compliance (IAM, Secrets Manager, AWS KMS).
- Monitoring & Logging (CloudWatch, X-Ray, GuardDuty).
- Automated Deployments with AWS CodeDeploy.
- AWS Whitepapers & Documentation.
- AWS Certified DevOps Engineer – Professional Practice Exams.
- Hands-on Labs with AWS Free Tier.
