Status of i386 docker images

[xzyfer]

The i386 docker images state they are experimental until the resolution of an upstream feature. That feature has since been implemented. Is there an update to the stability status of the i386 docker images?

We would like to start using them to build out x86 gyp binaries for distribution.

[SimenB]

@tianon is it enough to update the architectures files? The linked images doesn't seem like they're up to date anyways (last tags pushed 6 months ago)

[tianon]

We'll also need to update

docker-node/9.0/stretch/Dockerfile

Lines 25 to 33 in 222c645

	RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
	&& case "${dpkgArch##*-}" in \
	amd64) ARCH='x64';; \
	ppc64el) ARCH='ppc64le';; \
	s390x) ARCH='s390x';; \
	arm64) ARCH='arm64';; \
	armhf) ARCH='armv7l';; \
	*) echo "unsupported architecture"; exit 1 ;; \
	esac \

to reference x86, but yeah, I'd love to see i386 images! (they're really useful in my experience for testing at least basic multiarch support on a pure-amd64 machine)

[SimenB]

That stuff is missing from the alpine dockerfile, did #569 actually work?

EDIT: Yes it should, since we compile from source on alpine anyways

[tianon]

Yeah, as you noted, Alpine compiles from source thanks to musl:

$ manifest-tool inspect node:alpine | grep Arch
1           -    Arch: amd64
2           -    Arch: arm
3           -    Arch: arm64
4           -    Arch: ppc64le

Edit: s390x fails to build, but that's a separate issue (https://doi-janky.infosiftr.net/job/multiarch/view/images/view/node/job/s390x/job/node/58/console)