1-Click RoR installation: how is 'rails' user supposed to install gems?

You probably got some basic sudo permissions error. Try to use the following instead:

sudo bundle install

and

sudo gem install nokogiri

Think this will work for you.

Hi CrypticDesigns,

Thanks for your answer, but the droplet’s Ruby installation uses rvm, which specifically warns against sudo for things like installing gems. It is designed to work without having to do that, and doing it is a security risk.

Looking at the rvm documentation, I think that what is needed is to make the rails user a member of the rvm group. I am trying that now, but now I am getting other errors, probably because some library bundle depends on is not installed.

If I succeed in doing this, I will post an update to this question.

OK, I succeeded in running bundle install as the rails user (no sudo).

As the rvm documentation said, non-root users can install gems as needed in the system-wide Ruby if they are members of the rvm group. All you have to do is, as root, execute this command:

gpasswd -a rails rvm

After that, everything should work. The reason I was getting errors after that was that I am using the smallest droplet size and it was running out of memory. I created a temporary swap file (see this article for information about how to do that) and everything worked without problems.