Google App Engine Dockerfile error: Unable to locate package python3.8-CodePudding

I am using this Dockerfile to deploy to App Engine Flexible environment.

FROM gcr.io/google-appengine/python 
RUN apt-get -y update && apt-get -y upgrade\
    && apt-get install -y software-properties-common \
    && add-apt-repository -y ppa:ubuntugis/ppa \
    && add-apt-repository -y ppa:deadsnakes/ppa \
    && apt-get -y update && apt-get -y upgrade\
    && apt-get -y install python3.8 python3.8-distutils python3.8-venv \
       gdal-bin libgdal-dev python3-gdal  \
    && apt-get autoremove -y \
    && apt-get autoclean -y \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

RUN virtualenv /env -p python3.8
ENV VIRTUAL_ENV /env
ENV PATH /env/bin:$PATH
ADD requirements.txt /app/requirements.txt
RUN pip install -r /app/requirements.txt
...

I've been using this configuration for at least a year and deploy to GCP regularly. As of this morning, when I try to deploy I'm getting these errors:

Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
Calculating upgrade...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package python3.8
E: Couldn't find any package by glob 'python3.8'
E: Couldn't find any package by regex 'python3.8'
E: Unable to locate package python3.8-distutils
E: Couldn't find any package by glob 'python3.8-distutils'
E: Couldn't find any package by regex 'python3.8-distutils'
E: Unable to locate package python3.8-venv
E: Couldn't find any package by glob 'python3.8-venv'
E: Couldn't find any package by regex 'python3.8-venv'
The command '/bin/sh -c apt-get -y update && apt-get -y upgrade
&& apt-get install -y software-properties-common     
&& add-apt-repository -y ppa:ubuntugis/ppa     
&& add-apt-repository -y ppa:deadsnakes/ppa     
&& apt-get -y update 
&& apt-get -y upgrade    
&& apt-get -y install python3.8 python3.8-distutils python3.8-venv        gdal-bin libgdal-dev python3-gdal      
&& apt-get autoremove -y     
&& apt-get autoclean -y     
&& apt-get clean     
&& rm -rf /var/lib/apt/lists/*' returned a non-zero code: 100
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/docker" failed: step exited with non-zero status: 100

I'm not sure I want to change my Python version, since some of the packages use Python3.8.

Thanks in advance for any help you can provide.

CodePudding user response：

According to Google's documentation, you also need to add a Dockerfile in the same directory that contains the app.yaml file. For building Python containers, Google provides this base image:

The Python runtime has Python 2.7.9 and Python 3.7.2 pre-installed. You can customize the Dockerfile to install other versions or alternative interpreters if needed. You can specify whether to use Python 2 or Python 3 in your application's Dockerfile when creating the virtual environment:

Python 3

RUN venv /env -p python3.7

Python 2 (implicit)

RUN virtualenv /env

Python 2 (explicit)

RUN virtualenv /env -p python2.7

Here is some more information regarding Python Runtime, App Engine flexible environment, Python 3 Runtime Environment.

CodePudding user response：

In my case, I was using Ubuntu 16.04 and deadsnakes was no longer supporting Python3.8. See https://github.com/deadsnakes/issues/issues/195

I changed Docker to use FROM ubuntu:bionic and that allowed Docker to install Python3.8.