Missing `linux/ppc64le` for Golang 1.18 image

[jauderho]

Go 1.18 was just released but it appears that the build job for linux/ppc64le have failed and need to be respun.

This is in reference to docker-library/official-images#12045 (comment)

Per @DasSkelett,

• https://doi-janky.infosiftr.net/job/multiarch/view/images/view/golang/job/ppc64le/job/golang/
• https://doi-janky.infosiftr.net/job/multiarch/view/images/view/golang/job/ppc64le/job/golang/587/console

FWIW, it looks like PR docker-library/official-images#12055 is inbound so it's unclear if we want to wait until that rolls out.

[tianon]

The failure looks like a pretty consistent failure in either go from Alpine itself (installed fresh within that layer, so docker-library/official-images#12055 is not likely to cause any change), or in the bootstrap version of go that gets built from Alpine's go:

...
+ ./make.bash
Building Go cmd/dist using /usr/lib/go. (go1.16.10 linux/ppc64le)
Building Go toolchain1 using /usr/lib/go.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for linux/ppc64le.
go tool dist: FAILED: /usr/local/go/bin/go list -gcflags=all= -ldflags=all= -f={{if .Stale}}	STALE {{.ImportPath}}: {{.StaleReason}}{{end}} std cmd: signal: segmentation fault (core dumped)

[DasSkelett]

There's now an upstream Go issue tracking this, the Alpine people have hit the same trying to build the package for their repository:
golang/go#51787
One of their build logs: https://gitlab.alpinelinux.org/alpine/aports/-/jobs/661598#L1041

[jauderho]

Looks like ppc64le builds are showing up now BUT only for certain tags. ppc64le builds are available for alpine and alpine3.15 but not available for 1.18.0-alpine or 1.18.0-alpine3.15

See https://hub.docker.com/_/golang?tab=tags&page=1&name=alpine

[yosifkit]

Looks like ppc64le builds are showing up now BUT only for certain tags. ppc64le builds are available for alpine and alpine3.15 but not available for 1.18.0-alpine or 1.18.0-alpine3.15

The manifest lists that are the combination of multiple architectures into a single tag are built from the tags are available in each architecture (because some architectures take longer to build than others). For example, here is the Docker Hub ppc64le/golang repo. ppc64le images are pushed there and then another job combines them into the main manifest under https://hub.docker.com/_/golang. The result is that rather than architectures disappearing and reappearing on the more general tags, the slow (or failing-to-build architectures) instead happen to point to the previous image. In this case, it is the golang:1.17.8-alpine image.