Dockerfile should assign LANG=C_ALL

[stakemura]

System information

• Have I written custom code (as opposed to using a stock example script provided in TensorFlow):Yes
• OS Platform and Distribution (e.g., Linux Ubuntu 16.04):Ubuntu 16.04
• TensorFlow installed from (source or binary):official Dockerfile
• TensorFlow version (use command below):1.8.0
• Python version: 3.5
• Bazel version (if compiling from source):from Docker
• GCC/Compiler version (if compiling from source):from Docker
• CUDA/cuDNN version:not relevant
• GPU model and memory:not relevant
• Exact command to reproduce:see link

Describe the problem

Python 3 has a serious issue on LANG=C environment as described in Python Issue 19846.
In fact, official python or Anaconda Dockerfile assigned LANG=C.UTF-8 like Dockerfile

Can this be fixed in future releases?
Thank you so much.

[tensorflowbutler]

Thank you for your post. We noticed you have not filled out the following field in the issue template. Could you update them if they are relevant in your case, or leave them as N/A? Thanks.
Bazel version
CUDA/cuDNN version
GPU model and memory
Exact command to reproduce

[angerson]

Marking as contributions welcome -- this should be very easy to add.

Also, I've recently proposed a change to TensorFlow that obsoletes parameterized_docker_build.sh, which may help alleviate this issue (since the current Dockerfiles are very confusing). If anyone following this thread is interested in making TensorFlow's Dockerfile story better for everyone, please take a look at the RFC.

[yongtang]

Added a PR #21877 for the fix.

[tensorflowbutler]

Please remove the assignee, as this issue is inviting external contributions. Otherwise, remove the contributions welcome label. Thank you.