Issue with the docker-plugin_daemon-1

[it22323934]

Self Checks

• I have searched for existing issues search for existing issues, including closed ones.
• I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
• [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:)
• Please do not modify this template :) and fill in all the required fields.

1. Is this request related to a challenge you're experiencing? Tell me about your story.

The issues is that the docker-plugin_daemon-1 is keeping throwing this error without starting the container /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

2. Additional context or comments

No response

[dosubot[bot]]

Hi @it22323934! I'm Dosu and I’m helping the dify team.

The error /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8) happens because the container image sets the LANG and LC_ALL environment variables to en_US.UTF-8, but the actual locale isn't generated or installed inside the image. This is a common issue with minimal Docker images like python:3.12-slim-bookworm—setting the environment variables alone isn't enough; you also need to install the locales package and generate the locale inside the image.

To fix this, you can build a custom image for the plugin daemon with these lines in your Dockerfile (for Debian/Ubuntu-based images):

ENV LANG=en_US.UTF-8
ENV LC_ALL=en_US.UTF-8
ENV PYTHONIOENCODING=utf-8
RUN apt-get update && apt-get install -y locales && locale-gen en_US.UTF-8

Then rebuild and redeploy your container. This will remove the warning and ensure proper UTF-8 support for Python and other tools. More details and context are available in this discussion: see here.

Note: The warning itself is usually not fatal and doesn't always prevent the container from starting. If your container still fails to start, check the logs for other errors—often, database connection issues or misconfigured environment variables are the real cause of startup failures, not the locale warning itself (example).

To reply, just mention @dosu.

---

^{How did I do? Good | Irrelevant | Incorrect | Verbose | Hallucination | Report 🐛 | Other}    

[it22323934]

I added the following docker file for the Plugin Daemon but still getting the same issue.
`FROM python:3.12-slim-bookworm

Set locale environment variables

ENV LANG=en_US.UTF-8
ENV LC_ALL=en_US.UTF-8
ENV PYTHONIOENCODING=utf-8

Install locales package and generate en_US.UTF-8 locale

RUN apt-get update &&
apt-get install -y locales &&
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen &&
locale-gen en_US.UTF-8 &&
apt-get clean &&
rm -rf /var/lib/apt/lists/*

WORKDIR /app

COPY . .

RUN if [ -f requirements.txt ]; then pip install --no-cache-dir -r requirements.txt; fi

EXPOSE 8080

CMD ["gunicorn", "-b", "0.0.0.0:8080", "main:app"]
`