さわって理解するDocker入門 failed to solve: process

備忘録。
エラーのトラブルシューティングを並べました。

これをやりました。
https://www.ogis-ri.co.jp/otc/hiroba/technical/docker/part1.html

1. ERROR: failed to solve: process "/bin/sh -c apk add --update py2-pip" did not complete successfully: exit code: 1
   1.現行のpythonはversion3なので、dockerfileを以下に変更する

   # our base image
   FROM alpine:3.5
   
   # Install python and pip
   RUN apk add --update py3-pip
   
   # upgrade pip
   RUN pip install --upgrade pip
   
   # install Python modules needed by the Python app
   COPY requirements.txt /usr/src/app/
   RUN pip install --no-cache-dir -r /usr/src/app/requirements.txt
   
   # copy files required for the app to run
   COPY app.py /usr/src/app/
   COPY templates/index.html /usr/src/app/templates/
   
   # tell the port number the container should expose
   EXPOSE 5000
   
   # run the application
   CMD ["python", "/usr/src/app/app.py"]
   
   

2. ERROR: failed to solve: alpine:3.5: no match for platform in manifest sha256:66952b313e51c3bd1987d7c4ddf5dba9bc0fb6e524eed2448fa660246b3e76ec: not found
   1. バージョン互換が切れてるっぽいのでバージョンをlatestに変更する

   # our base image
   FROM alpine:latest
   
   # Install python and pip
   RUN apk add --update py3-pip
   
   # upgrade pip
   RUN pip install --upgrade pip
   
   # install Python modules needed by the Python app
   COPY requirements.txt /usr/src/app/
   RUN pip install --no-cache-dir -r /usr/src/app/requirements.txt
   
   # copy files required for the app to run
   COPY app.py /usr/src/app/
   COPY templates/index.html /usr/src/app/templates/
   
   # tell the port number the container should expose
   EXPOSE 5000
   
   # run the application
   CMD ["python", "/usr/src/app/app.py"]
   
   

これで正常に動いてるっぽい。