CA build fails with: cannot find module providing package .../apis/provisioningrequest/...

[pmendelski]

Which component are you using?:
cluster-autoscaler

What version of the component are you using?:
latest / master

What environment is this in?:
docker and localhost

What did you expect to happen?:
I expect master to build :)

What happened instead?:
Build on a fresh clone fails with cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/...

How to reproduce it (as minimally and precisely as possible):

# Please use fresh clone
❯ git clone git@github.com:kubernetes/autoscaler.git
❯ cd autoscaler/cluster-autoscaler
❯ make build-arch-amd64
rm -f cluster-autoscaler-amd64
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o cluster-autoscaler-amd64 --ldflags "-s"
processors/provreq/provisioning_request_injector.go:25:2: cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/autoscaling.x-k8s.io/v1beta1: import lookup disabled by -mod=vendor
    (Go version in go.mod is at least 1.14 and vendor directory exists.)
provisioningrequest/provreqclient/client.go:28:2: cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/client/clientset/versioned: import lookup disabled by -mod=vendor
    (Go version in go.mod is at least 1.14 and vendor directory exists.)
provisioningrequest/provreqclient/testutils.go:28:2: cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/client/clientset/versioned/fake: import lookup disabled by -mod=vendor
    (Go version in go.mod is at least 1.14 and vendor directory exists.)
provisioningrequest/provreqclient/client.go:29:2: cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/client/informers/externalversions: import lookup disabled by -mod=vendor
    (Go version in go.mod is at least 1.14 and vendor directory exists.)
provisioningrequest/provreqclient/client.go:30:2: cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/client/listers/autoscaling.x-k8s.io/v1beta1: import lookup disabled by -mod=vendor
    (Go version in go.mod is at least 1.14 and vendor directory exists.)
make: *** [Makefile:45: build-arch-amd64] Error 1

Executing make build-in-docker-arch-amd64 produces similar result.

Anything else we need to know?:

• I'm pretty sure that most makefile tasks fail on a fresh clone.
• Executing go mod vendor && make build-arch-amd64 succeeds.
• Regression was most likely introduced in: ClusterAutoscaler: Put APIs in a separate go module #6315
• Confirmed that build starts failing from commit 09954b6 (master branch)
• Similar issue cannot find module providing package k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/autoscaling.x-k8s.io/v1beta1: import lookup disabled by -mod=vendor #6664 - this issue mentioned test task only, and for the test task go mod vendor was added to the command chain, but the problem affects all actions. I believe we could introduce a task executed before all others but I'm not sure if that's a correct way to go.

[towca]

Ok, this is one of the fun bugs 😅

First line of our .gitignore is cluster-autoscaler. The dependencies we're missing from vendor should be in vendor/k8s.io/autoscaler/cluster-autoscaler - so they're ignored by git. They don't show up in git status, which is why it seems that go mod vendor doesn't do anything. But the files are actually vendored after go mod vendor, which is why build starts passing locally after that, and persists.

[pmendelski]

Thanks a lot for a quick intervention. In-deed, a funny one 😅
I created a fix.