3 ms·

I think it'll still be a virtual machine? It'll just mean that there could be an ARM native virtual machine rather than one emulating x86.

fulafel 6y ago
The secret to the lightweight nature of Docker is that it just uses various namespacing, cgroup etc functionality provided by Linux with no virtualized OS kernel or hw virtualization mechanisms involved. (Yep you need ARM Docker images when running on ARM of course)
- kelnos 6y ago
  Do we really expect to see many Docker images published that are compiled for ARM? Sure, I expect to see base OS images, but I'd find it hard to believe that many people are going to take the time to cross-build and publish an arm64 version of their container image alongside their x86_64 version. I guess to some extent that might be generally useful, what with things like AWS's Graviton ARM processors, but I expect it'll take a while.
  - fulafel 6y ago
    Most people build their own images using CI/CD to their own registries when using containers in production [1]. You don't really otherwise know what is in them. And for on-laptop hacking it's just a docker build command. [1]Especially now that public docker hub is ip rate limited to uselessness.
  - cpmsmith 6y ago
    Anecdotally, we already do see a substantial number. Far from 100%, but many of the most popular images on Docker Hub are already multi-arch. The most notable exception is the Docker-maintained MySQL image, but Oracle maintains another which works fine on ARM.
- deleted 6y ago
  [deleted]
- nicoburns 6y ago
  It does on linux. On macOS and windows it does still do this... but in a linux VM.
  - fulafel 6y ago
    Yep. Linux gaining HW support for the M1, and Docker on your penguinized mac, was the context I thought.
- thomaslord 6y ago
  Wouldn't Docker still need a VM for Linux containers on any non-Linux OS? My understanding is that it uses the host's kernel, so running it on macOS would always require a VM.

fulafel 6y ago

The secret to the lightweight nature of Docker is that it just uses various namespacing, cgroup etc functionality provided by Linux with no virtualized OS kernel or hw virtualization mechanisms involved. (Yep you need ARM Docker images when running on ARM of course)

kelnos 6y ago
Do we really expect to see many Docker images published that are compiled for ARM? Sure, I expect to see base OS images, but I'd find it hard to believe that many people are going to take the time to cross-build and publish an arm64 version of their container image alongside their x86_64 version. I guess to some extent that might be generally useful, what with things like AWS's Graviton ARM processors, but I expect it'll take a while.
- fulafel 6y ago
  Most people build their own images using CI/CD to their own registries when using containers in production [1]. You don't really otherwise know what is in them. And for on-laptop hacking it's just a docker build command. [1]Especially now that public docker hub is ip rate limited to uselessness.
- cpmsmith 6y ago
  Anecdotally, we already do see a substantial number. Far from 100%, but many of the most popular images on Docker Hub are already multi-arch. The most notable exception is the Docker-maintained MySQL image, but Oracle maintains another which works fine on ARM.
deleted 6y ago
[deleted]
nicoburns 6y ago
It does on linux. On macOS and windows it does still do this... but in a linux VM.
- fulafel 6y ago
  Yep. Linux gaining HW support for the M1, and Docker on your penguinized mac, was the context I thought.
thomaslord 6y ago
Wouldn't Docker still need a VM for Linux containers on any non-Linux OS? My understanding is that it uses the host's kernel, so running it on macOS would always require a VM.