add a more up to date example for tensorflow

[kannon92]

What this PR does / why we need it:
#1884 explains the reason.

I tried to run the example and I got a lot of warnings. @tenzen-y mentioned that this image is maintained in other examples.
Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Fixes #1884

Checklist:

• Docs included if any changes are user facing

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kannon92
Once this PR has been reviewed and has the lgtm label, please assign jeffwan for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[terrytangyuan]

Where is the source Dockerfile for this image?

[tenzen-y]

Here: https://github.com/kubeflow/katib/tree/888bec38f4d8d6b43a0606eb721809ec045be113/examples/v1beta1/trial-images/tf-mnist-with-summaries

[tenzen-y]

I'm wondering if we should remove https://github.com/kubeflow/training-operator/tree/855e0960668b34992ba4e1fd5914a08a3362cfb1/examples/tensorflow/mnist_with_summaries as well.

@terrytangyuan WDYT?

[terrytangyuan]

Perhaps add a link in the comment? We can keep the existing Dockerfiles if they still work (warnings are fine).

[tenzen-y]

Perhaps add a link in the comment? We can keep the existing Dockerfiles if they still work (warnings are fine).

SGTM

[kannon92]

Perhaps add a link in the comment? We can keep the existing Dockerfiles if they still work (warnings are fine).

I was not entirely sure what you meant by this. I added a comment to my example.

I found the warnings to be very scary for a new user. Using python 2.7 and a series of warnings around deprecated features, I was worried that it would break if I wanted to use this as an example.

It would be nice to have an up-to-date image in the examples.

[coveralls]

Pull Request Test Coverage Report for Build 5836921251

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 7 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.06%) to 42.777%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/controller.v1/mpi/mpijob.go	1	91.06%
pkg/controller.v1/mpi/mpijob_controller.go	2	80.5%
pkg/controller.v1/pytorch/pytorchjob_controller.go	4	67.42%

Totals
Change from base Build 5772492904:	-0.06%
Covered Lines:	3737
Relevant Lines:	8736

---

💛 - Coveralls

[johnugeorge]

Ref: #1884 (comment)

[kannon92]

As @johnugeorge mentions, I think we want to go a different route.

Rather than changing this image, the tensorflow example image should just be updated to use latest tensorflow.