[theptip]

Alpine's package manager has the great property that you don't need to update the index in order to fetch a package IIRC; the whole `apt-get update && apt-get install && <cleanup apt-cache>` dance is quite tedious in debian-based Docker containers.

[colemickens]

No, you still need to, but there's a compact syntax for it that will update and discard the index in a single 'add' command. It's unavoidable - somewhere some querying is happening in order map the package name/ver to a download link.

[jbergstroem]

I find the haproxy (alpine) Dockerfile a great example on how to tender to container file-size. It uses the syntax you're referring to, temporary build virtuals (should be multistage today I guess) and static linking: https://github.com/docker-library/haproxy/blob/2d393f2b59824...

[freedomben]

Awesome example, thanks. We've been starting using different Dockerfiles for prod and dev. For prod we want tiny images, but for dev the caching of layers is more important for frequent rebuilds. Such balance all the time :sigh: