Encoding Problems when running an app in docker (P

Question

On my own PC the application runs nice, but when it gets deployed into docker, it fails because of invalid characters.

I am using the ubuntu:lastest container and python3, java and ruby.

Answer 1

You need to set the locale correct.

This is the minimal correct Dockerfile:

FROM ubuntu:latest

RUN locale-gen en_US.UTF-8
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8

The usual docker images don't specify a locales. You see it if you bash into it and execute locale:

sudo docker exec -i -t yowsup3 bash

Sources:

• http://jaredmarkell.com/docker-and-locales/
• https://github.com/docker-library/python/issues/13