Automating container image migration from Amazon ECR to GitLab

Platform engineers frequently encountered challenges when migrating hundreds of container images from Amazon Elastic Container Registry (ECR) to GitLab as part of modernizing their DevSecOps toolchain. The manual process of pulling, retagging, and pushing each image was time-consuming and hindered critical infrastructure work. In response, a GitLab pipeline was developed to automate the migration process, allowing for the discovery, tagging, and transfer of images with minimal AWS permissions. This pipeline, which leverages Docker-in-Docker, streamlines the migration by automatically handling the image operations, providing error handling, consistent naming, and clear logging to track progress. Engineers can set up the pipeline quickly and let it run during off-peak hours, thus focusing on more valuable tasks. The solution is open-sourced and designed to be adapted to various needs, emphasizing efficiency and reducing manual intervention in the migration process.

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