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Unofficial Docker Image for Polynote https://polynote.org/

Dockerfile 59.62% Shell 40.38%

polynote docker dockerhub python scala sql vega

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Adverties binding to 127.0.0.1 only

In README you give an examples of using the image:

docker run -p 8192:8192 --name=polynote -d -t greglinscheid/polynote:latest

The problem is, this allows access from outside of the computer to port 8192, even if you think your firewall should catch it (in most cases; see moby/moby#22054 for lengthy discussion)

More secure way is to expose -p 127.0.0.1:8192:8192, esp. as this allows to run arbitrary code in the container.

SQL example

Could you provide an example in the documentation of how to use SQL cells?

PySpark cannot find Python

python3 APK installs only /usr/bin/python3 binary, but by default PySpark searches for python binary in PATH. This results in kernel error when enabling Spark in a notebook:

2019-11-19T10:55:15.696952916Z /usr/bin/find-spark-home: line 40: python: command not found
2019-11-19T10:55:15.697407078Z /usr/bin/spark-submit: line 27: /bin/spark-class: No such file or directory

I see two solutions to this problem. In Dockerfile:

Either link python to python3:

RUN cd /usr/bin && ln -s python3 python

or set PYSPARK_PYTHON variable (not tested, as for https://stackoverflow.com/questions/30279783/apache-spark-how-to-use-pyspark-with-python-3):
```
ENV PYSPARK_PYTHON python3
```

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