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Portability is key. Being able to run an Ubuntu container on macOS is a killer feature.

• pjmlp 6y ago
  Containers aren't virtual machines.
  • m463 6y ago
    In the macos case, they actually are. docker runs in a vm on macos. Actually, I believe one text file is the docker killer feature.
    • pjmlp 6y ago
      Nowhere in what makes a proper container does a VM come into play, unless we are speaking about Docker and the idea of shipping a full blown OS in a zip, to work across heterogeneous hardware.
      • inetknght 6y ago
        Yeah so the Docker daemon on a Mac is run inside of a VM.
        • pjmlp 6y ago
          Because they bundle a x86 GNU/Linux package as a runtime. It doesn't work bare metal for the new macs, and it is extra bloat instead of making use of macOS capabilities.
          • m463 6y ago
            It doesn't work bare metal for any mac. It runs in a VM. Too bad apple didn't help out docker with a macos native version. FROM macos:10.13.3 RUN xcode-build would have been really useful
• hda111 6y ago
  FreeBSD can run use LinuxJail to run a Ubuntu jail (it’s not a VM). I wonder why a billion $ company like docker can’t do this with Linux on macOS. It seems so obvious.