问题
I am using this Dockerfile on Azure Linux App Service:
FROM ruby:2.3.3
ENV "GEM_HOME" "/home/gems"
ENV "BUNDLE_PATH" "/home/gems"
EXPOSE 3000
WORKDIR /home/webapp
CMD bundle install && bundle exec rails server puma -b 0.0.0.0 -e production
As you can see the gems folder is located in the home folder. The home folder is shared with the host system of the App Service. Now my problem the App Service LogFiles/docker/docker_***_out.log indicates that bundle install is called multiple times (probably from different containers). This leads to that some gems are never successfully installed.
Is there some setting which runs just one container so that my gems can be installed successfully and not interferring with each other? Or am I making wrong assumptions here? Maybe the problem isn't that there a multiple containers started?
Is there an easier way to install the gems the first time in the shared folder of the host system?
来源：https://stackoverflow.com/questions/42258695/azure-linux-app-service-just-start-one-container