python version causing problem during Docker build

Question

I would like to avoid the following error. what should be the right way to do that. I could try to fix it by using python2-2.7.18-r0 instead of 2.7.16-r3. But the question is: will it be the future proof?

ERROR: unsatisfiable constraints:
  python2-2.7.18-r0:
    breaks: world[python=2.7.16-r3]
ERROR: Service 'frontend' failed to build: The command '/bin/sh -c apk add --no-cache make==4.2.1-r2 python=2.7.16-r3 g++=9.2.0-r4' returned a non-zero code: 1

Here is my Dockerfile:

FROM node:current-alpine as app-builder
ARG NODE_ENV
ENV NODE_ENV ${NODE_ENV}

RUN apk add --no-cache make==4.2.1-r2 python=2.7.16-r3 g++=9.2.0-r4
RUN mkdir -p /app
WORKDIR /app

COPY package.json yarn.lock ./
RUN yarn install --frozen-lockfile

COPY . .
RUN yarn build

better to add your part of Dockerfile or way to reproduce it — Adiii
– Adiii, Commented May 8, 2020 at 12:13

David Maze · Accepted Answer · 2020-05-08 12:50:03Z

1

Will it be future proof?

No. Python 2 is already end-of-lifed. It will not get any bug fixes and security issues will not be addressed. You should upgrade your application to Python 3, ideally before the Python 2 end-of-life date of 1 January 2020 (four months ago).

In terms of the Dockerfile you show, I'd avoid extremely specific version constraints like you have. Using the latest version of packages in a specific release of a Linux distribution is usually safe (code tested on Python 2.7.16-r3 will almost certainly run fine on Python 2.7.18-r0). You might want to pick a more specific distribution in your image's FROM line (for example, FROM node:14-alpine3.11) to minimize surprises.

answered May 8, 2020 at 12:50

David Maze

165k47 gold badges262 silver badges302 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

MD. Jahidul Islam Over a year ago

if we fix specific version distribution in docker file, doesn't that mean we are not getting any security update and making dockerfile vulnerable to attack?

David Maze Over a year ago

If you target node:14-alpine-3.11, and occasionally docker build --pull, that tag gets updated to newer versions of Node 14.x (right now it is 14.2.0), so you will get updates.

Collectives™ on Stack Overflow

python version causing problem during Docker build

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related