fixed typo in kuber yaml

[DuaneNielsen]

What do these changes do?

Related issue number

Linter

• I've run scripts/format.sh to lint the changes in this PR.

[DuaneNielsen]

Okies, here tis

[AmplabJenkins]

Can one of the admins verify this patch?

[robertnishihara]

@virtualluke Does this look right to you?

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/13642/
Test FAILed.

[DuaneNielsen]

Lol, dunno how that change can cause a test to fail :)

[robertnishihara]

Thanks @DuaneNielsen! Some of our tests are flaky unfortunately.

What command did you use to validate the config file? Maybe we should run that in our CI.

[virtualluke]

Sorry for the typo, to put a test I guess we could add a minikube run with the files (adds a lot of complexity I guess with k8s versions/platform), guessing other people have done that for testing and if you think it worthwhile I can explore. Anyone else done this that is reading this?

[DuaneNielsen]

Well, I just ran

kubectl create -f ray/kubernetes/head.yaml

I only got a warning though... so dunno if that would even cause a failed build.

But a quick google reveals we are not the first to run into this challenge. So through the wonders of open source...

https://github.com/garethr/kubeval

[robertnishihara]

I also ran the PR that introduced the typo in minikube before merging it and it still succeeded.