You would get an error if there is bundler's version difference between BUNDLED WITH in Gemfile.lock and the installed bundler.
https://dev.to/tanakaworld/how-to-resolve-you-must-use-bundler-2-or-greater-with-this-lockfile-2pf7
You can resolve the issue by followings.
- Update the gem in image
gem update --system - Install any version bundler
gem install bundler -v <version>
Example:
FROM ruby:2.6.2
ENV APP_HOME /app
WORKDIR $APP_HOME
COPY Gemfile $APP_HOME/Gemfile
COPY Gemfile.lock $APP_HOME/Gemfile.lock
ENV BUNDLER_VERSION 2.1.0
RUN gem update --system \
&& gem install bundler -v $BUNDLER_VERSION \
&& bundle install -j 4
COPY . $APP_HOME
Top comments (1)
It works. I just had to change the Gemfile.lock COPY command
When running a fresh project Gemfile.lock is not generated to the way to copy in Docker a non-existing file is with
.*COPY Gemfile.* $APP_HOME/Gemfile.*