Cannot install velero with go get + go install

[georgettica]

What steps did you take and what happened:

$ GO111MODULE=on go get -v -u github.com/vmware-tanzu/velero
go get: github.com/vmware-tanzu/velero@v1.5.1 requires
        github.com/kubernetes-csi/external-snapshotter/v2@v2.2.0-rc1 requires
        k8s.io/kubernetes@v1.18.0 requires
        k8s.io/api@v0.0.0: reading k8s.io/api/go.mod at revision v0.0.0: unknown revision v0.0.0

$ cd $(go env GOPATH)/src/github.com/vmware-tanzu/velero
$ go install .
go: github.com/kubernetes-csi/external-snapshotter/v2@v2.2.0-rc1 requires
        k8s.io/kubernetes@v1.18.0 requires
        k8s.io/kubectl@v0.0.0 requires
        vbom.ml/util@v0.0.0-20160121211510-db5cfe13f5cc: unrecognized import path "vbom.ml/util": https fetch: Get "https://vbom.ml/util?go-get=1": dial tcp: lookup vbom.ml on XXXXXXXX:53: no such host

What did you expect to happen:
that the velero cli will be installed successfully

Environment:
running inside a fedora container with go installed

• OS (e.g. from /etc/os-release):

$ cat /etc/os-release
NAME=Fedora
VERSION="32 (Container Image)"
ID=fedora
VERSION_ID=32
VERSION_CODENAME=""
PLATFORM_ID="platform:f32"
PRETTY_NAME="Fedora 32 (Container Image)"
ANSI_COLOR="0;34"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:32"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f32/system-administrators-guide/"
SUPPORT_URL="https://fedoraproject.org/wiki/Communicating_and_getting_help"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=32
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=32
PRIVACY_POLICY_URL="https://fedoraproject.org/wiki/Legal:PrivacyPolicy"
VARIANT="Container Image"
VARIANT_ID=container

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[nrb]

Thanks for this - I was able to replicate the issue.

In general, our supported delivery methods are via the GitHub releases, and there is a Linux client available.

I'll file this as a bug though, as our dependency tree should resolve correctly via go get.

[nrb]

It looks like we may have to update to external-snapshotter v3 for better Go modules support, but I'm not 100% sure.

[zubron]

It looks like we may have to update to external-snapshotter v3 for better Go modules support, but I'm not 100% sure.

I think this will still be an issue in the new version 😞 v3.0.0 still relies on the Kubernetes repo which doesn't support being used as a library. It looks like the folks working/relying on external-snapshotter have been trying to get the parts that the project relies on to be usable outside of that repo (kubernetes/kubernetes#85692 , kubernetes/kubernetes#85693)

It looks like there are some workarounds which we could propose to that project.

[zubron]

I looked at this a bit more, and the external-snapshotter project actually created a separate go module for the client and APIs which doesn't have the dependency on k/k and using it fixes the problem here. This new go module is available in v2.2.0-rc3, so we wouldn't have to upgrade the API types to v3 but updating to that newer RC means that we pull in v0.19.0-rc2 versions of some of the Kubernetes modules. v3 of the module uses the GA release of the Kubernetes modules: v0.19.0.

Either way, to fix this we're going to have to do some upgrading of the Kubernetes modules we're using.

[georgettica]

Thatks all ( that includes you @zubron ) for pushing this issue forward

I agree @nrb that this should be done via the normal releases and still it's a good self check to see all the modules are in order.

If you need 🙌 for this, would gladly see what I can do to make this a reality

[nrb]

@georgettica Thanks!

I think we'll need to move this to v1.5.3 or v1.6.0 because v1.5.2 is going to get cut this week.

[pires]

Well, this doesn't affect installing Velero CLI alone but also any plug-ins that import Velero code. Maybe I'll just wait before polluting my go.mod w/ something like this.

[nrb]

@pires Unfortunately, those requires directives are for Kubernetes, not Velero. Every project importing Kubernetes needs it :(

[carlisia]

Hey @georgettica, do you have bandwidth to tackle this for our v1.6 release?

[georgettica]

I will do my best and will consult when necessary.
Sign me up!

[lmdkfs]

i have the same problem， when i execute go get github.com/vmware-tanzu/velero/pkg/plugin/framework, the error is reported as follows:

go: found github.com/vmware-tanzu/velero/pkg/plugin/framework in github.com/vmware-tanzu/velero v1.5.2
go get: github.com/vmware-tanzu/velero@v1.5.2 requires
	github.com/kubernetes-csi/external-snapshotter/v2@v2.2.0-rc1 requires
	k8s.io/kubernetes@v1.18.0 requires
	k8s.io/api@v0.0.0: reading k8s.io/api/go.mod at revision v0.0.0: unknown revision v0.0.0

How to solve this problem before 1.6 is released

[georgettica]

I am having trouble fixing the issue, tried to tackle from multiple angles and to no avail :( I will upload a PR with a failing test and I hope you could guide me to a suceeding build

[brito-rafa]

+1 while trying to compile a velero plugin:

$ go mod tidy
go: finding module for package k8s.io/apimachinery/pkg/runtime/schema
go: finding module for package github.com/openshift/api/route/v1
go: finding module for package k8s.io/client-go/tools/clientcmd
go: finding module for package k8s.io/api/core/v1
go: finding module for package k8s.io/client-go/kubernetes
go: finding module for package github.com/brito-rafa/k8s-mutators/pkg/route2httpproxy
go: finding module for package k8s.io/client-go/dynamic
go: finding module for package k8s.io/apimachinery/pkg/apis/meta/v1
go: finding module for package github.com/projectcontour/contour/apis/projectcontour/v1
go: finding module for package github.com/vmware-tanzu/velero/pkg/plugin/velero
go: finding module for package github.com/sirupsen/logrus
go: finding module for package github.com/vmware-tanzu/velero/pkg/plugin/framework
go: finding module for package k8s.io/apimachinery/pkg/apis/meta/v1/unstructured
go: found github.com/sirupsen/logrus in github.com/sirupsen/logrus v1.7.0
go: found github.com/vmware-tanzu/velero/pkg/plugin/framework in github.com/vmware-tanzu/velero v1.5.3
go: found github.com/brito-rafa/k8s-mutators/pkg/route2httpproxy in github.com/brito-rafa/k8s-mutators v0.2.0
go: found github.com/openshift/api/route/v1 in github.com/openshift/api v3.9.0+incompatible
go: found github.com/projectcontour/contour/apis/projectcontour/v1 in github.com/projectcontour/contour v1.11.0
go: found k8s.io/api/core/v1 in k8s.io/api v0.20.2
go: found k8s.io/apimachinery/pkg/apis/meta/v1 in k8s.io/apimachinery v0.20.2
go: found k8s.io/client-go/dynamic in k8s.io/client-go v11.0.0+incompatible
go: github.com/vmware-tanzu/velero@v1.5.3 requires
        github.com/kubernetes-csi/external-snapshotter/v2@v2.2.0-rc1 requires
        k8s.io/kubernetes@v1.18.0 requires
        k8s.io/api@v0.0.0: reading k8s.io/api/go.mod at revision v0.0.0: unknown revision v0.0.0

[georgettica]

@brito-rafa it's still being worked on in #3202
you can track progress there :)

[arianitu]

I'm running into this, is there any workarounds to make it compile with v1.5.x? @georgettica

[georgettica]

Once my PR is merged yes, but so far I am not done on it so it will take a while longer.

If someone wiser than me has a quick fix, feel free to.speak up

[brito-rafa]

I used the following workaround on my go.mod (as pointed in a previous comment by @pires ):
https://github.com/vmware-tanzu/velero-plugin-for-vsphere/blob/master/go.mod#L28-L68

I added all these "replace" directives as specified on this file.

[arianitu]

@brito-rafa thank you, that worked perfectly! I'll remove those when it's fixed upstream. Cheers.