Kubernetes is now using go1.8.1 at HEAD as the supported Go version

[lu...@luxaslabs.com]

Heads up everyone,

https://github.com/kubernetes/kubernetes/pull/41636 and a couple of related PRs moved the supported Go version for official Kubernetes builds from go1.7.5 to go1.8.1

It's highly recommended that you're using go1.8+ when developing Kubernetes from now on.

`make release` and a lot of other development scripts are already using the build container from the specialized `kube-cross` image that

contains all build deps for Kubernetes. The only thing you need for developing Kubernetes efficiently is docker.

Basically `build/run.sh` will wrap any command in the build container that is the supported build environment.

Kubernetes v1.7 will be the first stable version to use go1.8.x for all released builds.

Best Regards,

Lucas

[Klaus Ma]

If upgrade to go 1.8, the following tests are failed; should I re-open those PR?

https://github.com/kubernetes/kubernetes/pull/44838

https://github.com/kubernetes/kubernetes/pull/44839

[Guangya Liu]

Please make sure a clean upgrade from go1.7.X to go1.8.1 as https://github.com/golang/go/issues/19143 proposed if you have some build error issues as https://github.com/kubernetes/kubernetes/issues/45214

>If you are upgrading from an older version of Go you must first remove the existing version.
To remove an existing Go installation from your system delete the go directory. This is usually /usr/local/go under Linux, Mac OS X, and FreeBSD or c:\Go under Windows.

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[Jeff Grafton]

I know everyone's workflow is different, but using gvm has made frequently switching go versions (up and down) painless for me. (I also set up an alias to cd into my kubernetes working directory and automatically run "gvm use goX.Y" so that I never accidentally use the system go runtime.)

On Tue, May 2, 2017 at 12:37 AM, Guangya Liu <gyli...@gmail.com> wrote:

Please make sure a clean upgrade from go1.7.X to go1.8.1 as https://github.com/golang/go/issues/19143 proposed if you have some build error issues as https://github.com/kubernetes/kubernetes/issues/45214

>If you are upgrading from an older version of Go you must first remove the existing version.
To remove an existing Go installation from your system delete the go directory. This is usually /usr/local/go under Linux, Mac OS X, and FreeBSD or c:\Go under Windows.

On Thu, Apr 27, 2017 at 1:35 AM, <lu...@luxaslabs.com> wrote:

Heads up everyone,

https://github.com/kubernetes/kubernetes/pull/41636 and a couple of related PRs moved the supported Go version for official Kubernetes builds from go1.7.5 to go1.8.1

It's highly recommended that you're using go1.8+ when developing Kubernetes from now on.

`make release` and a lot of other development scripts are already using the build container from the specialized `kube-cross` image that

contains all build deps for Kubernetes. The only thing you need for developing Kubernetes efficiently is docker.

Basically `build/run.sh` will wrap any command in the build container that is the supported build environment.

Kubernetes v1.7 will be the first stable version to use go1.8.x for all released builds.

Best Regards,

Lucas

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[Wojciech Tyczynski]

 FYI - we found a significant performance regression connected to update to Go 1.8.1 - for more details see:

https://github.com/kubernetes/kubernetes/issues/45216

 We are still investigating potential solutions, but for now we can't exclude rolling back to Go 1.7.5 (though we would like to avoid it if possible).

 Thanks

wojtek

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[lu...@luxaslabs.com]

Thanks @wojtek!

Was just about to mention that issue, but you did it for me ;)

I'm pretty confident we can fix it to avoid rolling back to go1.7, but as said, it may be a last resort.

If I understood it correctly, some of the Kubelet Certificate Rotation stuff depends on go 1.8, so if we rollback that feature might be held back.

See:

 - https://github.com/kubernetes/kubernetes/pull/45059

 - https://github.com/kubernetes/kubernetes/pull/41912

@mikedanese is that understanding correct?

Lucas

Den tisdag 9 maj 2017 kl. 15:45:50 UTC+3 skrev Wojciech Tyczynski:

 FYI - we found a significant performance regression connected to update to Go 1.8.1 - for more details see:

https://github.com/kubernetes/kubernetes/issues/45216

 We are still investigating potential solutions, but for now we can't exclude rolling back to Go 1.7.5 (though we would like to avoid it if possible).

 Thanks

wojtek

On Tue, May 2, 2017 at 8:59 PM, 'Jeff Grafton' via Kubernetes developer/contributor discussion <kuberne...@googlegroups.com> wrote:

I know everyone's workflow is different, but using gvm has made frequently switching go versions (up and down) painless for me. (I also set up an alias to cd into my kubernetes working directory and automatically run "gvm use goX.Y" so that I never accidentally use the system go runtime.)

On Tue, May 2, 2017 at 12:37 AM, Guangya Liu <gyli...@gmail.com> wrote:

Please make sure a clean upgrade from go1.7.X to go1.8.1 as https://github.com/golang/go/issues/19143 proposed if you have some build error issues as https://github.com/kubernetes/kubernetes/issues/45214

>If you are upgrading from an older version of Go you must first remove the existing version.
To remove an existing Go installation from your system delete the go directory. This is usually /usr/local/go under Linux, Mac OS X, and FreeBSD or c:\Go under Windows.

On Thu, Apr 27, 2017 at 1:35 AM, <lu...@luxaslabs.com> wrote:

Heads up everyone,

https://github.com/kubernetes/kubernetes/pull/41636 and a couple of related PRs moved the supported Go version for official Kubernetes builds from go1.7.5 to go1.8.1

It's highly recommended that you're using go1.8+ when developing Kubernetes from now on.

`make release` and a lot of other development scripts are already using the build container from the specialized `kube-cross` image that

contains all build deps for Kubernetes. The only thing you need for developing Kubernetes efficiently is docker.

Basically `build/run.sh` will wrap any command in the build container that is the supported build environment.

Kubernetes v1.7 will be the first stable version to use go1.8.x for all released builds.

Best Regards,

Lucas

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