Run python mysql client on slim python 3.6 docker image
Question:
I have a working service running on a python:3.6-jessie image.
I am trying to reduce the size of it to speed up serverless cold starts.
I have tried the images python:3.6-alpine, python:3.6-slim-buster and python:3.6-slim-jessie.
With all of them I end up having to install many additional packages and I end up with the follwing error that I cannot fix with more packages:
ImportError: libmysqlclient.so.18: cannot open shared object file: No such file or directory
My current Dockerfile is
FROM python:3.6-jessie as build
ENV PYTHONUNBUFFERED 0
ENV FLASK_APP "api/app.py"
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
WORKDIR /opt/venv
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt
COPY . .
FROM python:3.6-slim-jessie
COPY --from=build /opt/venv /opt/venv
WORKDIR /opt/venv
RUN apt-get update
RUN apt-get --assume-yes install gcc
RUN apt-get --assume-yes install python-mysqldb
ENV PATH="/opt/venv/bin:$PATH"
RUN rm -rf configs tests draw_results env .idea .git .pytest_cache
EXPOSE 8000
CMD ["/opt/venv/run.sh"]
The relevant lines from requirements.txt:
mysqlclient==1.4.2.post1
PyMySQL==0.9.3
Flask-SQLAlchemy==2.3.2
SQLAlchemy==1.3.0
The run.sh is just my gunicorn start command.
Is there any package I can use to fix this last issue, is there some other mysql library I should be using or some other way for me to fix this. Or should I just stick to full python:3.6 images when I want a mysql client?
Answers:
Try to add this line to the dockerfile:
RUN apt-get install -y libmysqlclient-dev
I’m using python:3.7-slim and using the following command
RUN apt-get -y install default-libmysqlclient-dev
For python slim-buster (debian os) use can run this command on Dockerfile.
RUN apt-get update && apt-get install -y default-mysql-client
This worked for me.
I have used python:3.10.6-slim-buster
I have a working service running on a python:3.6-jessie image.
I am trying to reduce the size of it to speed up serverless cold starts.
I have tried the images python:3.6-alpine, python:3.6-slim-buster and python:3.6-slim-jessie.
With all of them I end up having to install many additional packages and I end up with the follwing error that I cannot fix with more packages:
ImportError: libmysqlclient.so.18: cannot open shared object file: No such file or directory
My current Dockerfile is
FROM python:3.6-jessie as build
ENV PYTHONUNBUFFERED 0
ENV FLASK_APP "api/app.py"
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
WORKDIR /opt/venv
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt
COPY . .
FROM python:3.6-slim-jessie
COPY --from=build /opt/venv /opt/venv
WORKDIR /opt/venv
RUN apt-get update
RUN apt-get --assume-yes install gcc
RUN apt-get --assume-yes install python-mysqldb
ENV PATH="/opt/venv/bin:$PATH"
RUN rm -rf configs tests draw_results env .idea .git .pytest_cache
EXPOSE 8000
CMD ["/opt/venv/run.sh"]
The relevant lines from requirements.txt:
mysqlclient==1.4.2.post1
PyMySQL==0.9.3
Flask-SQLAlchemy==2.3.2
SQLAlchemy==1.3.0
The run.sh is just my gunicorn start command.
Is there any package I can use to fix this last issue, is there some other mysql library I should be using or some other way for me to fix this. Or should I just stick to full python:3.6 images when I want a mysql client?
Try to add this line to the dockerfile:
RUN apt-get install -y libmysqlclient-dev
I’m using python:3.7-slim and using the following command
RUN apt-get -y install default-libmysqlclient-dev
For python slim-buster (debian os) use can run this command on Dockerfile.
RUN apt-get update && apt-get install -y default-mysql-client
This worked for me.
I have used python:3.10.6-slim-buster