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Harbor vs DockerSlim: What are the differences?
Developers describe Harbor as "Manage and serve container images in a secure environment (created at VMware)". Harbor is an open source cloud native registry that stores, signs, and scans container images for vulnerabilities Harbor solves common challenges by delivering trust, compliance, performance, and interoperability. It fills a gap for organ. On the other hand, DockerSlim is detailed as "Minify and secure your Docker containers". Minify and secure Docker containers (free and open source). Don't change anything in your Docker container image and minify it by up to 30x making it secure too!
Keep doing what you are doing. No need to change anything. Use the base image you want. Use the package manager you want. Don't worry about hand optimizing your Dockerfile. You shouldn't have to throw away your tools and your workflow to have small container images.
Harbor and DockerSlim are primarily classified as "Docker Registry" and "Container" tools respectively.
Harbor and DockerSlim are both open source tools. Harbor with 10.4K GitHub stars and 2.9K forks on GitHub appears to be more popular than DockerSlim with 7.13K GitHub stars and 225 GitHub forks.