'Unable to start new Rails project from within Ruby's Alpine docker image

I have a docker image with the following Dockerfile based on Ruby's Alpine docker image.

FROM ruby:2.6.5-alpine3.10

RUN apk add --no-cache build-base \
                       bash \
                       postgresql-dev;

RUN gem install rails

When I run rails new ., I don't see any error but many directories that should be generated as a result of the command are not generated. Here is what I see:

→ docker-compose run app rails new . --database=postgresql
       exist
      create  README.md
      create  Rakefile
      create  .ruby-version
      create  config.ru
      create  .gitignore
      create  Gemfile
         run  git init from "."

However, if I build a docker image based on Ubuntu, rails new . generates all the directories and files as excepted.

Could I be overlooking some configuration or setup?

ruby-on-railsrubydocker


Solution 1:[1]

Git is not installed on your docker image. Below steps fixed the problem:

  1. Add git to your DockerFile

RUN apk add --no-cache build-base \ bash \ postgresql-dev \ git;

  1. docker-compose build
  2. docker-compose run app rails new . --database=postgresql

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Moustafa Mahran

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