Rails7 on podman は、もっと簡単な Dockerfile と Gemfile を見つけてきたら動きました。
( podman image name を間違えて ruby 2.7 でやっていた)
podman -network host だと、localhost:port で外からもアクセスできる。ま、制限もできるんだろけど。
なので、割と簡単に Rails7 を動かせる。VM 抜きで。
bundle install を何回もするの変なんだけど。
cat Dockerfile
FROM ruby:3.1
RUN apt -y update && apt -y upgrade && apt -y install vim zsh
RUN apt install iproute2 -y
RUN apt install iputils-ping
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
RUN bundle exec rails new blog
WORKDIR /myapp/blog
RUN bundle install
# COPY . /myapp
# Add a script to be executed every time the container starts.
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000
# Start the main process.
CMD ["bundle","exec","rails", "server", "-b", "0.0.0.0"]
cat Gemfile
source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby "3.1.2"
# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
gem "rails", github: "rails/rails", branch: "7-0-stable"
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