sanic-org / sanic-docker

Official Docker images for Sanic

Sanic Dockerfile

This repository is for the Sanic Docker image.

What does this image do?

It preinstalls the latest Sanic LTS version on top of a Python 3.7. The container runs Alpine Linux.

How do I use this?

Setup your own Dockerfile

FROM sanicframework/sanic:LTS

RUN mkdir /srv
COPY . /srv

EXPOSE 8888

ENTRYPOINT ["python3", "/srv/my-sanic-server.py"]

Build it

docker build -t my-sanic-server .

Run it as you would any other container

docker run my-sanic-server

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Are you looking for a best practices solution with some guidance on how to setup your Sanic App? We will be releasing a second image in the future with some more guidance.

sanic-docker's Issues

Update do Sanic 19.12

Hello,

I believe 19.12 is also a LTS version. Could you update the image ?

Thanks,
Damien

Include the WORKDIR option in Dockerfile and mkdir /srv error

Proposed changes:

FROM sanicframework/sanic:LTS

RUN mkdir -p /srv  # <-- by adding -p, it will do nothing if the folder already exists
COPY . /srv
WORKDIR /srv  # <-- new

EXPOSE 8888

ENTRYPOINT ["python3", "my-sanic-server.py"]  # <-- removed /srv/ 

Rationale

If WORKDIR is not set, all paths referred to in my-sanic-server.py will start from root / instead of /srv. This breaks relative paths in "my-sanic-server.py" when accessing other files in the container or e.g. creating logs.

User story

I modified the Docker file found under base to include SQLAlchemy and copied the equivalent of "my-sanic-server.py" to /srv/ + a SQLite3 database (sample.db). My Python file uses a relative path to access sample.db. I didn't have any problems when running locally, but in a Docker container I was getting errors as: sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such table: foo.
Originally I thought it was a permission problem ("users" inside a Docker container inheriting the same permissions of the host OS's user with the same UID), but I finally found out that the issue was with the path. It was solved by setting WORKDIR.

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mkdir

Also, RUN mkdir /srv in your README to create Docker images based on FROM sanicframework/sanic:LTS does not work, as it gives the error:

mkdir: cannot create directory ‘/srv’: File exists