Question
Do installing gems on the Rails/PostGres droplet require sudo privileges?
- Posted October 21, 2016
- RubyRuby on RailsUbuntu
Hi, I created a droplet using the Rails/PostGres image for Ubuntu. After uploading my Rails app, I get these warnings when tryihng to run rake tasks …
$ rake db:migrate
Ignoring binding_of_caller-0.7.2 because its extensions are not built. Try: gem pristine binding_of_caller --version 0.7.2
Ignoring byebug-8.2.2 because its extensions are not built. Try: gem pristine byebug --version 8.2.2
Ignoring debug_inspector-0.0.2 because its extensions are not built. Try: gem pristine debug_inspector --version 0.0.2
Ignoring executable-hooks-1.3.2 because its extensions are not built. Try: gem pristine executable-hooks --version 1.3.2
Ignoring gem-wrappers-1.2.7 because its extensions are not built. Try: gem pristine gem-wrappers --version 1.2.7
Ignoring kgio-2.10.0 because its extensions are not built. Try: gem pristine kgio --version 2.10.0
Ignoring nokogiri-1.6.7.2 because its extensions are not built. Try: gem pristine nokogiri --version 1.6.7.2
Ignoring pg-0.18.4 because its extensions are not built. Try: gem pristine pg --version 0.18.4
Ignoring raindrops-0.16.0 because its extensions are not built. Try: gem pristine raindrops --version 0.16.0
Ignoring unicorn-5.0.1 because its extensions are not built. Try: gem pristine unicorn --version 5.0.1
/home/abrownstein/.rbenv/versions/2.3.0/bin/rake: exception reentered (fatal)
So based on the warnings, I ran what they suggested to try …
$ gem pristine binding_of_caller --version 0.7.2
Ignoring binding_of_caller-0.7.2 because its extensions are not built. Try: gem pristine binding_of_caller --version 0.7.2
Ignoring byebug-8.2.2 because its extensions are not built. Try: gem pristine byebug --version 8.2.2
Ignoring debug_inspector-0.0.2 because its extensions are not built. Try: gem pristine debug_inspector --version 0.0.2
Ignoring executable-hooks-1.3.2 because its extensions are not built. Try: gem pristine executable-hooks --version 1.3.2
Ignoring gem-wrappers-1.2.7 because its extensions are not built. Try: gem pristine gem-wrappers --version 1.2.7
Ignoring kgio-2.10.0 because its extensions are not built. Try: gem pristine kgio --version 2.10.0
Ignoring nokogiri-1.6.7.2 because its extensions are not built. Try: gem pristine nokogiri --version 1.6.7.2
Ignoring pg-0.18.4 because its extensions are not built. Try: gem pristine pg --version 0.18.4
Ignoring raindrops-0.16.0 because its extensions are not built. Try: gem pristine raindrops --version 0.16.0
Ignoring unicorn-5.0.1 because its extensions are not built. Try: gem pristine unicorn --version 5.0.1
Error loading RubyGems plugin "/usr/local/rvm/gems/ruby-2.2.1@global/gems/executable-hooks-1.3.2/lib/rubygems_plugin.rb": cannot load such file -- executable-hooks/wrapper (LoadError)
Error loading RubyGems plugin "/usr/local/rvm/gems/ruby-2.2.1@global/gems/gem-wrappers-1.2.7/lib/rubygems_plugin.rb": cannot load such file -- gem-wrappers (LoadError)
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /usr/local/rvm/gems/ruby-2.2.1 directory.
But you see taht error about permissions. Am I required to use sudo when running gem installs/upgrades on the Rails/Postgres Ubuntu droplet?
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tl;dr: Yes. It’s because you don’t have permissions to write in
/usr/local/rvm.sudowill not work for it. This is becausegemis only available to logged in user. When you rungem pristine binding_of_caller --version 0.7.2as non-root user it will give you this:But why you execute
sudo gem pristine binding_of_caller --version 0.7.2:sudoandgemare not working together. If you have root password you can just change to it:You can also SSH directly to root
ssh root@droplet-ipif you didn’t setPermitRootLogintono. Enter password and execute command.It’s another story now.
You can also change the ownership of
/usr/localwhile you do it:Execute
gem pristineand puff. It is working. When you finish you can return to local to root if you wantBasically you need root privileges because of owner of /usr/local is root. When you
So only root can write to /usr/local. This is why you get permissions error, if you execute command as root user or change ownership, it is working :)