ECReshore - Container Image Migration Tool

ECReshore is a CLI tool for copying container images to AWS ECR registries with intelligent multi-architecture support and batch processing capabilities.

Core Commands

copy - Copy Single Images

Copy container images to ECR with automatic multi-architecture detection.

Basic Usage:

# Copy with automatic repository inference
ecreshore copy nginx:latest

# Copy with custom target repository
ecreshore copy nginx:latest my-nginx-repo

# Copy with specific platforms
ecreshore copy nginx:latest --platforms linux/amd64,linux/arm64

# Copy all architectures
ecreshore copy nginx:latest -A

Key Features:

• Smart repository inference - Automatically determines target repository name
• Multi-architecture support - Preserves all platforms when Docker Buildx available
• Skip-if-present - Automatically skips if target image already exists with matching content
• Force override - Use --force to transfer even if target exists

scan - Kubernetes Cluster Scanning

Scan Kubernetes clusters to identify non-ECR container images.

Basic Usage:

# Scan current cluster and generate batch config
ecreshore scan --export batch-config.yaml

# Scan specific namespace
ecreshore scan -n production

# Scan all namespaces
ecreshore scan -A

# Generate report format
ecreshore scan --output report

Key Features:

• Workload discovery - Scans Deployments, DaemonSets, StatefulSets, Jobs, CronJobs, Pods
• ECR filtering - Only identifies non-ECR images that need migration
• Batch config generation - Creates ready-to-use configuration files
• Namespace targeting - Include/exclude specific namespaces

batch - Batch Processing

Execute multiple image transfers from YAML configuration files.

Basic Usage:

# Execute batch transfers
ecreshore batch config.yaml

# Preview without executing
ecreshore batch config.yaml --dry-run

# Force rich UI display
ecreshore batch config.yaml --rich

# Output structured logs
ecreshore batch config.yaml --output log

Configuration Format:

settings:
  concurrent_transfers: 3    # Parallel transfers
  retry_attempts: 3          # Retry attempts per transfer
  verify_digests: true       # Verify image integrity
  region: us-east-2         # AWS region

transfers:
  - source: nginx:latest
    target: my-nginx
    source_tag: latest
    target_tag: latest

Key Features:

• Concurrent processing - Configurable parallel transfers (default: 3)
• Progress tracking - Rich UI with real-time transfer status
• Error handling - Automatic retries with configurable attempts
• Skip detection - Automatically skips existing images with matching content

purge - Repository Cleanup

Remove images from ECR repositories with safety controls.

Basic Usage:

# Preview deletion for specific repository
ecreshore purge my-repo --dry-run

# Purge repository, keeping latest image
ecreshore purge my-repo --keep-latest

# Preview deletion for all repositories
ecreshore purge -A --dry-run

# Purge with pattern matching
ecreshore purge -A --filter my-app-* --keep-latest

Key Features:

• Safety first - Always use --dry-run to preview deletions
• Selective deletion - Target specific repositories or use patterns
• Latest preservation - --keep-latest protects most recent images
• Bulk operations - Process all repositories with filtering options

Common Workflow

1. Discovery: Scan your cluster to identify images needing migration

   ecreshore scan --export migration-plan.yaml
   

2. Preview: Review the generated configuration and preview the batch operation

   ecreshore batch migration-plan.yaml --dry-run
   

3. Execute: Run the batch migration

   ecreshore batch migration-plan.yaml
   

4. Cleanup: Optionally purge old/unused images

   ecreshore purge old-repo --dry-run
   ecreshore purge old-repo --keep-latest
   

Global Options

• -v, --verbose - Increase verbosity (-v for INFO, -vv for DEBUG)
• --region - AWS region (respects AWS_DEFAULT_REGION, AWS_REGION, ~/.aws/config)
• --registry-id - AWS account ID for ECR registry
• --simple/--rich - Force specific UI modes (auto-detected by default)

UI Modes

ECReshore automatically detects your terminal capabilities and chooses the best display mode:

• Rich UI - Full-featured progress bars, colors, and real-time updates
• Simple UI - Text-based progress suitable for basic terminals
• Log output - Structured JSON logs for automation and monitoring

Use ecreshore terminal-info to see your terminal's detected capabilities.

Authentication

ECReshore uses your existing AWS credentials. Ensure you have:

• AWS CLI configured (aws configure)
• Appropriate ECR permissions (ecr:* or specific ECR actions)
• Docker daemon running for image operations

Test authentication with:

ecreshore auth-test

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For additional commands and advanced options, run ecreshore --help or ecreshore COMMAND --help.