Unable to update cronjob image using kubectl set image

[okke-formsma]

/kind feature

What happened:
I would like to use a newer version of my image in a cronjob, but I can't update the cronjob template using 'kubectl set'

What you expected to happen:
I would expect to issue a command like the following, but it's not possible to update a cronjob template.

kubectl set image cronjob python=python:3.5

How to reproduce it (as minimally and precisely as possible):
create a cronjob and try to update the image that is pulled for each job.

Environment:

• Kubernetes version (use kubectl version):
  Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.5", GitCommit:"cce11c6a185279d037023e02ac5249e14daa22bf", GitTreeState:"clean", BuildDate:"2017-12-07T16:16:03Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"windows/amd64"}
  Server Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.4", GitCommit:"9befc2b8928a9426501d3bf62f72849d5cbcd5a3", GitTreeState:"clean", BuildDate:"2017-11-20T05:17:43Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

• Cloud provider or hardware configuration:
  azure

• Install tools:
  acs-engine

[okke-formsma]

I have found the following way to update the image;

kubectl patch -f definition.yaml --type=json -p='[{"op":"replace", "path": "/spec/jobTemplate/spec/template/spec/containers/0/image", "value":"python:3.5"}]'

Still it would be nice to use the same tool (kubectl set image) for both deployments and cronjobs.

[dims]

/sig cli

[xingzhou]

yeap, the UpdatePodSpecForObject method does not handle cronjob situation. In addition, CronJob does not contain a direct Pod template spec, instead, it contains JobTemplate which contains the pod spec. I will try to give a fix on this then.

[webbrandon]

👍

[liggitt]

Fixed in #57742

[richtera]

Which version will contain the new kubectl set image support for cronjobs? Is this just a command line patch or also system images?

[calebmcelroy]

@richtera, it's in v1.10. Seem to be just a command line patch.

This worked for me:
kubectl set image cronjob/cronjobmetadataname python=python:3.5

I know this is an older thread but hopefully it helps someone else!

[richtera]

@calebmcelroy oh cool. Thanks I'll be able to fix my scripts and simplify things

[yashsaini77]

@richtera, it's in v1.10. Seem to be just a command line patch.

This worked for me:
kubectl set image cronjob/cronjobmetadataname python=python:3.5

I know this is an older thread but hopefully it helps someone else!

what is exactly the cronjobmetadataname here