AWS ECR
Amazon Elastic Container Registry (ECR) is a fully managed container registry. Store, manage, and deploy container images with integrated vulnerability scanning.
What is ECR? (Simple Explanation)
ECR is an AWS service in the Compute category. Amazon Elastic Container Registry (ECR) is a fully managed container registry.
When Would You Use ECR?
- Container image storage and distribution
- CI/CD pipeline image promotion
- Image vulnerability management
- Cross-account and cross-region replication
Who Uses ECR?
From startups to enterprises, ECR powers:
What Makes ECR Powerful
ECR Pricing & Free Tier
Free Tier: 750 hours/month of t2.micro or t3.micro (12 months). Pay-as-you-go thereafter — from ~$0.005/hour for nano instances.
ECR Best Practices
- 1Use IMDSv2 to prevent SSRF credential theft
- 2Right-size instances — most workloads use <30% of allocated CPU
- 3Use Spot or Reserved Instances for 50-72% cost savings
- 4Enable termination protection on production instances
- 5Tag all instances for cost allocation and governance
Getting Started with ECR in 5 Minutes
- 1Open the AWS Console and navigate to ECR
- 2Click "Launch" or "Create" and choose your configuration (OS, instance type, region)
- 3Configure security settings — attach an IAM role and select or create a security group
- 4Review your settings and click "Launch" — your resource is ready in minutes
ECR CLI Quick Reference
2 production-ready commands. Full CLI Library (225+ services) →
aws ecr describe-repositories --query 'repositories[*].{Name:repositoryName,URI:repositoryUri,Created:createdAt}' --output tableList all ECR repositoriesaws ecr describe-images --repository-name my-repo --query 'imageDetails[*].{Tags:imageTags,Pushed:imagePushedAt,Size:imageSizeInBytes}'View images in a repository with tags and push datesPros & Cons of ECR
Pros
- Basic and enhanced image scanning for CVEs
- Lifecycle policies for automatic image cleanup
- Cross-region and cross-account replication
- Pull-through cache for public registries
- OCI and Docker image manifest support
Cons
- ✕Costs can escalate quickly without right-sizing and Reserved Instances
- ✕Requires understanding of instance types, AMIs, and networking for optimal use
- ✕Not truly serverless (except Lambda/Fargate) — you still manage OS, patches, scaling config
ECR vs Alternatives
ECR vs ECS
Choose ECR for Container image storage and distribution and CI/CD pipeline image promotion. It excels at basic and enhanced image scanning for cves.
Choose ECS as an alternative when your requirements differ. Each service in the Compute category serves different architectural patterns.
Services That Work with ECR
ECR is rarely used alone. It is typically combined with:
Compliance & Security
How AWS ECR fits into major compliance standards. Browse all 41 frameworks →
ECR configuration is audited by CIS Benchmarks v1.5–v3.0 for secure cloud defaults.
NIST 800-53ECR access controls, encryption, and audit logging map to NIST 800-53 AC, SC, and AU control families.
PCI DSS 4.0ECR encryption, access control, and logging support PCI DSS for cardholder data environments.
SOC 2ECR security, availability, and confidentiality controls evaluated under SOC 2 Trust Services Criteria.
ISO 27001ECR configuration and monitoring controls map to ISO 27001 Annex A information security management.
Frequently Asked Questions About ECR
What is AWS ECR?
Amazon Elastic Container Registry (ECR) is a fully managed container registry. Store, manage, and deploy container images with integrated vulnerability scanning.
What is ECR used for?
ECR is commonly used for: Container image storage and distribution; CI/CD pipeline image promotion; Image vulnerability management; Cross-account and cross-region replication. It's a core service in the compute category of AWS.
Is ECR free?
Free Tier: 750 hours/month of t2.micro or t3.micro (12 months). Pay-as-you-go thereafter — from ~$0.005/hour for nano instances.
What are the key features of ECR?
ECR's most important capabilities include: Basic and enhanced image scanning for CVEs. Lifecycle policies for automatic image cleanup. Cross-region and cross-account replication. Pull-through cache for public registries. OCI and Docker image manifest support. Each of these is designed to help teams container image storage and distribution.
How does ECR compare to alternatives?
ECR competes with both AWS-native alternatives (ECS, EKS, CodeBuild) and third-party equivalents. The right choice depends on your specific requirements for scalability, cost, and operational overhead. See the comparisons section below for detailed guidance.
Which compliance frameworks apply to ECR?
CIS AWS v3.0: ECR configuration is audited by CIS Benchmarks v1.5–v3.0 for secure cloud defaults. NIST 800-53: ECR access controls, encryption, and audit logging map to NIST 800-53 AC, SC, and AU control families. PCI DSS 4.0: ECR encryption, access control, and logging support PCI DSS for cardholder data environments. SOC 2: ECR security, availability, and confidentiality controls evaluated under SOC 2 Trust Services Criteria. ISO 27001: ECR configuration and monitoring controls map to ISO 27001 Annex A information security management.
People also search for
Was this page helpful?
Ready to secure your ECR configuration?
Pavora continuously monitors your AWS ECR for misconfigurations, compliance violations, and security risks.