Search...

Trending this month -CSA•CISM•A+•AZ-900•AWS CCP•AI-102•Security+•TOGAF•AWS AIF•CIS-DF

🎯Timer + tasks for focus →Foci

Quick Feedback

AWS DevOps Engineer Professional (DOP-C02) Study Notes

CI/CD Pipeline Architecture

Building automated software delivery pipelines on AWS

Exam Domain

SDLC Automation is the largest exam domain at 22%. Master CodePipeline, CodeBuild, CodeDeploy, and deployment strategies.

AWS Developer Tools Suite

Service	Purpose	Key Features
CodeCommit	Source control (Git)	Managed Git repos, IAM auth, encryption at rest
CodeBuild	Build & test	Managed build service, buildspec.yml, custom environments
CodeDeploy	Deployment automation	EC2, Lambda, ECS deployments, rollback support
CodePipeline	Orchestration	End-to-end CI/CD, stage transitions, manual approvals
CodeArtifact	Artifact management	Package repos for npm, Maven, pip, NuGet

Deployment Strategies

Strategy	Description	Rollback Speed	Use Case
In-Place	Update existing instances	Slow (redeploy)	Dev/test environments
Rolling	Update in batches	Medium	Non-critical production
Blue/Green	New environment, swap traffic	Fast (swap back)	Zero-downtime production
Canary	Small % traffic first	Fast	Risk-sensitive deployments
All-at-once	Update all simultaneously	Slow	Low-risk updates

buildspec.yml Structure

version: 0.2 (always use latest)
phases: install → pre_build → build → post_build
artifacts: files and base-directory for output
cache: paths to cache between builds (e.g., node_modules)
env: variables, parameter-store, secrets-manager references

Exam Focus Areas

CodeDeploy appspec.yml hooks order: BeforeInstall → AfterInstall → ApplicationStart → ValidateService
Blue/Green with ALB: Shift traffic via listener rules, not DNS
CodePipeline can trigger on CloudWatch Events or webhooks
Cross-account deployments use IAM roles with AssumeRole

Infrastructure as Code (IaC)

Managing infrastructure through code with CloudFormation and CDK

CloudFormation Key Concepts

Stacks: Unit of deployment, create/update/delete together
StackSets: Deploy stacks across accounts and regions
Change Sets: Preview changes before applying
Drift Detection: Identify manual changes to resources
Nested Stacks: Modular templates using AWS::CloudFormation::Stack
Custom Resources: Lambda-backed for unsupported resources

CloudFormation vs CDK vs Terraform

Feature	CloudFormation	CDK	Terraform
Language	JSON/YAML	TypeScript, Python, etc.	HCL
State	AWS-managed	Synthesizes to CFn	Local/remote state file
Drift Detection	Built-in	Via CFn	terraform plan
Multi-cloud	AWS only	AWS only	Multi-cloud

Update Behaviors

No Interruption

Resource updated in place with no downtime

Some Interruption

Brief disruption during update

Replacement

New resource created, old one deleted

Exam Focus Areas

DeletionPolicy: Retain keeps resources when stack is deleted
UpdateReplacePolicy: Retain keeps old resource during replacement
cfn-init for bootstrapping EC2 instances with metadata
cfn-signal with WaitCondition/CreationPolicy for readiness signaling

AWS DevOps Engineer Professional (DOP-C02) Study Notes

CI/CD Pipeline Architecture

Building automated software delivery pipelines on AWS

Exam Domain

SDLC Automation is the largest exam domain at 22%. Master CodePipeline, CodeBuild, CodeDeploy, and deployment strategies.

AWS Developer Tools Suite

Service	Purpose	Key Features
CodeCommit	Source control (Git)	Managed Git repos, IAM auth, encryption at rest
CodeBuild	Build & test	Managed build service, buildspec.yml, custom environments
CodeDeploy	Deployment automation	EC2, Lambda, ECS deployments, rollback support
CodePipeline	Orchestration	End-to-end CI/CD, stage transitions, manual approvals
CodeArtifact	Artifact management	Package repos for npm, Maven, pip, NuGet

Deployment Strategies

Strategy	Description	Rollback Speed	Use Case
In-Place	Update existing instances	Slow (redeploy)	Dev/test environments
Rolling	Update in batches	Medium	Non-critical production
Blue/Green	New environment, swap traffic	Fast (swap back)	Zero-downtime production
Canary	Small % traffic first	Fast	Risk-sensitive deployments
All-at-once	Update all simultaneously	Slow	Low-risk updates

buildspec.yml Structure

version: 0.2 (always use latest)
phases: install → pre_build → build → post_build
artifacts: files and base-directory for output
cache: paths to cache between builds (e.g., node_modules)
env: variables, parameter-store, secrets-manager references

Exam Focus Areas

CodeDeploy appspec.yml hooks order: BeforeInstall → AfterInstall → ApplicationStart → ValidateService
Blue/Green with ALB: Shift traffic via listener rules, not DNS
CodePipeline can trigger on CloudWatch Events or webhooks
Cross-account deployments use IAM roles with AssumeRole

Infrastructure as Code (IaC)

Managing infrastructure through code with CloudFormation and CDK

CloudFormation Key Concepts

Stacks: Unit of deployment, create/update/delete together
StackSets: Deploy stacks across accounts and regions
Change Sets: Preview changes before applying
Drift Detection: Identify manual changes to resources
Nested Stacks: Modular templates using AWS::CloudFormation::Stack
Custom Resources: Lambda-backed for unsupported resources

CloudFormation vs CDK vs Terraform

Feature	CloudFormation	CDK	Terraform
Language	JSON/YAML	TypeScript, Python, etc.	HCL
State	AWS-managed	Synthesizes to CFn	Local/remote state file
Drift Detection	Built-in	Via CFn	terraform plan
Multi-cloud	AWS only	AWS only	Multi-cloud

Update Behaviors

No Interruption

Resource updated in place with no downtime

Some Interruption

Brief disruption during update

Replacement

New resource created, old one deleted

Exam Focus Areas

DeletionPolicy: Retain keeps resources when stack is deleted
UpdateReplacePolicy: Retain keeps old resource during replacement
cfn-init for bootstrapping EC2 instances with metadata
cfn-signal with WaitCondition/CreationPolicy for readiness signaling