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In the ever-evolving landscape of version control systems, AWS CodeCommit to BitBucket migration has become a strategic move for many organizations. This whitepaper provides a comprehensive, step-by-step guide to efficiently migrate your repositories and configurations, ensuring minimal disruption to your development workflow.
Understanding the Migration Landscape
Why CodeCommit to BitBucket Migration ?
- Enhanced collaboration features
- Improved CI/CD integration capabilities
- More flexible access control and permissions
- Advanced code review and pull request functionalities
Key Challenges in Migration
- Preserving commit history and branches
- Maintaining user access and permissions
- Updating CI/CD pipelines and integrations
- Minimizing downtime during transition
Step-by-Step Migration Process
Step 1: Preparation and Assessment
- Inventory existing CodeCommit repositories
- Assess repository size and complexity
- Identify active branches and tags
- Document current access permissions and integrations
Step 2: Setting Up BitBucket Environment
- Create a BitBucket account or organization
- Set up project structure in BitBucket
- Configure user access and permissions
Step 3: Repository Migration
- Clone CodeCommit repository locally
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git clone --mirror https://git-codecommit.REGION.amazonaws.com/v1/repos/REPO_NAME
2. Push to BitBucket repository
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cd REPO_NAME.git
git push --mirror https://USERNAME@bitbucket.org/WORKSPACE/REPO_NAME.git
3. Verify repository content in BitBucket
Step 4: Migrating Branches and Tags
1. Push all branches to BitBucket
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git push origin --all
2. Push all tags
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git push origin --tags
Step 5: Updating CI/CD Configurations
- Update build triggers to point to Bitbucket repositories.
- Modify deployment scripts with new repository URLs
- Update webhook configurations for integrations
Step 6: Access Control and Permissions
- Map CodeCommit IAM roles to BitBucket user groups
- Set up branch permissions in BitBucket
- Configure repository access levels for teams
Step 7: Testing and Verification
- Clone repositories from BitBucket to verify content
- Test CI/CD pipelines with sample commits
- Verify user access and permissions
Addressing Common Migration Challenges
Challenge 1: Large Repository Size
Solution: Use Git LFS (Large File Storage) for handling large files and consider using BitBucket’s import feature for repositories exceeding 2GB.
Challenge 2: Complex Branch Structures
Solution: Utilize BitBucket’s branch management features to recreate and enforce branch policies similar to CodeCommit’s.
Challenge 3: Webhook and Integration Migration
Solution: Manually recreate webhooks in BitBucket and update integration configurations to point to new repository URLs.
Challenge 4: User Access Transition
Solution: Implement a phased migration approach, maintaining parallel access to both systems during transition.
Best Practices for Successful Migration
- Conduct a thorough pre-migration analysis
- Create a detailed migration plan with rollback procedures
- Perform a trial migration with a non-critical repository
- Communicate clearly with all stakeholders throughout the process
- Provide training on BitBucket features to development teams
Frequently Asked Questions
- Q: How long does a typical CodeCommit to BitBucket migration take? A: The duration varies based on repository size and complexity, but typically ranges from a few hours to several days for large-scale migrations.
- Q: Can we maintain our existing branching strategy after migration? A: Yes, BitBucket supports various branching strategies and can be configured to match your current workflow.
- Q: How do we handle sensitive information during migration? A: Sensitive data should be removed or encrypted before migration. Consider using BitBucket’s repository secrets for storing sensitive information.
- Q: Can we automate the migration process for multiple repositories? A: Yes, the migration process can be automated using scripts or tools like BitBucket’s API for bulk operations.
- Q: How do we ensure all team members have the correct access after migration? A: We recommend creating a user access matrix before migration and systematically applying permissions in BitBucket post-migration.
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