> sometimes it’s necessary to run a container that hasn’t been compiled for aarch64
I have several containers in that boat, for which no ARM versions exist at all. Those containers were previously using QEMU to emulate x86 on ARM linux (in Docker's VM on an ARM Mac). That emulation encountered the failures I described, and was slow.
Something I don't know and am curious about is how Docker-for-Mac is actually using Rosetta 2. Is it running an additional Linux VM containing an x86 Linux OS, and running that VM through a Rosetta-2-enabled hypervisor? Or is Rosetta 2 distributed as a Linux program that is being invoked inside Docker's pre-existing aarch64 Linux VM instead of (or inside of?) QEMU?
Edit: as for your question:
> if you have no Linux system involved because you have no VM, how would that work?
Yes, Rosetta 2 is being used by Docker’s pre-existing aarch64 Linux VM. So it’s only translating userspace x86 code to Arm, then running it on the ARM Linux VM. Syscalls, etc. are still handled by the (aarch64) Linux VM.
> sometimes it’s necessary to run a container that hasn’t been compiled for aarch64
I have several containers in that boat, for which no ARM versions exist at all. Those containers were previously using QEMU to emulate x86 on ARM linux (in Docker's VM on an ARM Mac). That emulation encountered the failures I described, and was slow.
Switching to use Rosetta 2 in Docker solved the problems; the process for enabling it is described here: https://levelup.gitconnected.com/docker-on-apple-silicon-mac...
Something I don't know and am curious about is how Docker-for-Mac is actually using Rosetta 2. Is it running an additional Linux VM containing an x86 Linux OS, and running that VM through a Rosetta-2-enabled hypervisor? Or is Rosetta 2 distributed as a Linux program that is being invoked inside Docker's pre-existing aarch64 Linux VM instead of (or inside of?) QEMU?
Edit: as for your question:
> if you have no Linux system involved because you have no VM, how would that work?
That's not my situation, so I'm not sure.