Skaffold not working anymore on Alpine Linux with v0.31.0 release

[math-nao]

Expected behavior

Skaffold v0.31.0 commands should work on Alpine Linux as it is working with Skaffold v0.30.0 and below.

Actual behavior

skaffold: not found

Information

• Skaffold version: v0.31.0
• Operating system: Alpine Linux v3.9
• Contents of skaffold.yaml: N/A

Steps to reproduce the behavior

1. docker run --rm -it alpine:3.9
2. This should return an error: apk add --no-cache curl && curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/v0.31.0/skaffold-linux-amd64 && chmod +x skaffold && mv skaffold /usr/local/bin && skaffold -h
3. Previous command for v0.30.0 and below is working

[briandealwis]

Maybe from #2006?

[priyawadhwa]

@dgageot do you think this could be related to the CGO change that was merged in this release?

[dgageot]

@priyawadhwa yes, I'm pretty sure it's due to the CGO thing.

[dgageot]

ldd skaffold
	/lib64/ld-linux-x86-64.so.2 (0x7f4eb0471000)
	libpthread.so.0 => /lib64/ld-linux-x86-64.so.2 (0x7f4eb0471000)
	libc.so.6 => /lib64/ld-linux-x86-64.so.2 (0x7f4eb0471000)
Error relocating skaffold: __vfprintf_chk: symbol not found
Error relocating skaffold: __fprintf_chk: symbol not found

Maybe there are options to make sure it's statically compiled.

[dgageot]

It looks like we are missing -ldflags '-extldflags "-static"'. The Makefile has GO_LDFLAGS += -extldflags \"${LDFLAGS}\" but LDFLAGS is not configured...