Source: aws.amazon.com
Reducing Docker image build time on AWS CodeBuild using an external cacheCategory: Docker, containerization, automation
A typical Docker image is built from several intermediate layers that are constructed during the initial image build process on a host. These intermediate layers are reused if found valid in any subsequent image rebuild; doing so speeds up the build process considerably because the Docker engine doesn’t need to rebuild the whole image if the layers in the cache are still valid.
After the first build of a Docker image is complete, the image is tagged and pushed to Amazon Elastic Container Registry (Amazon ECR). In each subsequent build, the image is pulled from Amazon ECR and the Docker build process is forced to use it as cache for its next build iteration of the image.
The solution provides significant improvements in the execution time of the Docker build process on CodeBuild and is general enough to accommodate the majority of use cases, including multi-stage builds.
After the first build of a Docker image is complete, the image is tagged and pushed to Amazon Elastic Container Registry (Amazon ECR). In each subsequent build, the image is pulled from Amazon ECR and the Docker build process is forced to use it as cache for its next build iteration of the image.
The solution provides significant improvements in the execution time of the Docker build process on CodeBuild and is general enough to accommodate the majority of use cases, including multi-stage builds.
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