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ci: update docker before the linux/386 build - #958

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bhuvan-somisetty wants to merge 1 commit into
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bhuvan-somisetty:ci/386-docker-upgrade
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bhuvan-somisetty wants to merge 1 commit into
metacall:developfrom
bhuvan-somisetty:ci/386-docker-upgrade

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@bhuvan-somisetty

@bhuvan-somisetty bhuvan-somisetty commented Nov 12, 2026 •

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Fixes the Build (linux/386) job in the multi-arch docker workflow, as discussed with viferga on Discord (2026-11-13).

Cause
The job started failing on 2026-11-10 when ubuntu-latest moved to ubuntu-26.04. That image ships Docker 29.4.2, whose default seccomp profile makes socketcall return ENOSYS (CVE-2026-31431 hardening). 32-bit glibc does every socket call through socketcall, so socket.socketpair() in the py_loader asyncio thread fails with OSError: [Errno 38] Function not implemented and metacallcli index.py cannot load.

Change
One step, only for linux/386, before QEMU/buildx setup: upgrade docker-ce, docker-ce-cli and containerd.io from the Docker apt repo the runner image already configures (26.04 repo has up to 29.9.3), then print docker version. It can be dropped once the runner image ships a fixed Docker.

Testing
Not run on a runner yet, this PR's CI is the test. The docker version output in the new step shows the engine that ends up running.

AI-ASSISTED: yes,
Claude code

The ubuntu-26.04 runner ships Docker 29.4.2, whose default seccomp profile
makes socketcall return ENOSYS. 32-bit glibc does every socket call through
socketcall, so socketpair() fails in the py_loader asyncio thread and the
linux/386 integration test stops with errno 38. Docker 29.4.3 and later
allow socketcall again (moby/moby#52506), so upgrade the engine from the
Docker apt repo the runner image already has, only for the linux/386 job.

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