"yum install puppet" vs "gem install puppet" on CentOS with Ruby 2.0. Gem works, not yum.

[Alexander Gray II]

Hey guys,

We have ruby 2.0.0 installed on a CentOS box.

I installed puppet via "yum install puppet":

[root@ip-10-165-39-216 ec2-user]# yum list installed | grep puppet
puppet.noarch                     3.5.1-1.el6                  @puppetlabs-products

But I get this error if I try to run puppet:

[ec2-user@ip-10-165-39-216 ~]$ puppet --version
/usr/share/ruby/vendor_ruby/2.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- puppet/util/command_line (LoadError)
from /usr/share/ruby/vendor_ruby/2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/bin/puppet:3:in `<main>'

So for giggles, I did a "gem install puppet":

And puppet works:

[root@ip-10-165-39-216 ec2-user]# puppet --version
3.5.1

Why does "gem install puppet" work, but not "yum install puppet"?

Thanks!

[Kenton Brede]

Puppet from the repo uses ruby 1.8.  Your ec2 instance is using ruby 2.0.

If you want to change which ruby version you're using on your ec2 servers, you can run:

alternatives --config ruby

If ruby 1.8 isn't installed on your system, you'll need to install it before you run the "alternatives" command. I probably didn't have to mention that though. :)

Kent

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Kent Brede