install controller-gen failed: sf.IsExported undefined

[ycyxuehan]

go build -o ${HOME}/go/bin/controller-gen main.go
# sigs.k8s.io/json/internal/golang/encoding/json
/root/go/pkg/mod/sigs.k8s.io/json@v0.0.0-20211020170558-c049b76a60c6/internal/golang/encoding/json/encode.go:1249:12: sf.IsExported undefined (type reflect.StructField has no field or method IsExported)
/root/go/pkg/mod/sigs.k8s.io/json@v0.0.0-20211020170558-c049b76a60c6/internal/golang/encoding/json/encode.go:1255:18: sf.IsExported undefined (type reflect.StructField has no field or method IsExported)
go version
go version go1.16.10 linux/amd64

[Thor-wl]

+1

[HeGaoYuan]

+1

[Dimss]

+1

[sonujose]

Same issue
golang - 1.16.9

[Thor-wl]

I've solved this problem by upgating golang to v1.17. Not sure whether it is a bug for v1.16 or not.

[HeGaoYuan]

Can it be solved by not upgating golang to v1.17?

[Thor-wl]

Unfortunately, I tried some ways but all failed.

[dineshputchala]

@Thor-wl Updating to

I've solved this problem by upgating golang to v1.17. Not sure whether it is a bug for v1.16 or not.

Updating to latest golang is solving this issue ?

[Thor-wl]

@Thor-wl Updating to

I've solved this problem by upgating golang to v1.17. Not sure whether it is a bug for v1.16 or not.

Updating to latest golang is solving this issue ?

Yes

[swiftslee]

cc

[ngood97-splunk]

I believe this is related: kubernetes-sigs/json#8

[Thor-wl]

I believe this is related: kubernetes-sigs/json#8

+1

[lmcdasm]

Same issue here, trying to bump golang version, but it causes massive refactor to lots of other components.

Any alternative options?

[ls-2018]

+1

[titaneric]

same here with Go version 1.16.5,

[moluzhui]

The same problem is in go1.16, which lower version can solve this problem? Thanks

[dineshputchala]

Not observed this issue in v1.17.8

[davidlanouette]

reflect.StructField was added in go 1.17. If you are using it and compiling with an earlier version of go, you will have a bad time.

Edit:

MR #639 introduced a new version of sigs.k8s.io/json. That version requires go v1.17. That MR did bump the go version for controller-tools to v1.17. But, it looks like that change wasn't "documented" anywhere, so it's easy to understand why nobody knew that they needed to move to a newer version of go.

[dgloe-hpe]

The install guide for operator-sdk says that go 1.16 is required, is that not the case any more?
https://sdk.operatorframework.io/docs/building-operators/golang/installation/

[camilamacedo86]

HI @dgloe-hpe,

The SDK will use go get to check this one, see https://github.com/operator-framework/operator-sdk/blob/master/testdata/go/v3/memcached-operator/Makefile#L150-L153 and inform the version.

So each SDK bin/release is compatible with which does.

The doc shared here is outdated because that should match with the latest release and the latest one uses go 1.17, see: https://github.com/operator-framework/operator-sdk/blob/v1.18.1/go.mod#L3

So, could you please raise an issue against the SDK repo asking for the doc be updated and have the info that the go version needs to be >= 1.17 < 1.18? Also, feel free to contribute with by pushing a PR. Your collab is very welcome.

[camilamacedo86]

Regards this issue, controller-tools is using go 1.17 and have it solved. See its latest release 0.8.0: https://github.com/kubernetes-sigs/controller-tools/blob/v0.8.0/go.mod#L3

So, I am closing this one. however, if anyone need help in the future regards this one then please feel free to raise a new issue.

[zhaowei413]

the same issue with you on go 1.16. Fixed after upgrade to go1.18.....