' ``` If I edit the plugin to use the Ruby embedded in Sensu, I get this: # ./cpu-mpstat-metrics.rb Sensu::Plugin::CLI: [“Not implemented! You should override Sensu::Plugin::CLI#run.”] /opt/sensu/embedded/lib/ruby/2.0.0/rubygems/core\_ext/kernel\_require.rb:53:in `require’: cannot load such file – linux/kstat (LoadError) ``` from /opt/sensu/embedded/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:53:in `require' from ./cpu-mpstat-metrics.rb:12:in `

' ``` Either way, various components are missing, and I need to install them. But it seems to me that, if I pick one Ruby and start installing things into it, I should stick to it from now on. What’s the generally recommended in this situation? ---

**Author:** ![Kyle\_Anderson](https://avatars.discourse-cdn.com/v4/letter/k/e5b9ba/32.png) [@Kyle\_Anderson](https://discourse.sensu.io/u/Kyle_Anderson)\ **Post date:** [September 23, 2014, 3:16pm UTC](https://discourse.sensu.io/t/sensu-embedded-ruby-vs-system-ruby/258/2 "2014-09-23T15:16:06Z")

It is up to you and your environment. One reason I personally like to use the embedded ruby is that it allows me to have a consistent version of a modern ruby across all my platforms. (boo Ruby 1.8.5) But if you are not super familiar with how gems work, it is very easy to apt-get install rubygem-bla and have it work on the system ruby. It is up to you. > **···** > > On Mon, Sep 22, 2014 at 5:41 PM, Florin Andrei \ wrote: > > > First time installing Sensu. It seems like I need to make a choice now for > > the route I want to take with the plugins. Either use the Ruby embedded in > > Sensu, or use the system Ruby. > > > > I've downloaded this plugin: > > > > [https://github.com/sensu/sensu-community-plugins/blob/master/plugins/system/cpu-mpstat-metrics.rb](https://github.com/sensu/sensu-community-plugins/blob/master/plugins/system/cpu-mpstat-metrics.rb) > > > > If I use the system Ruby, I get these errors: > > > > # ./cpu-mpstat-metrics.rb > > /usr/lib/ruby/1.9.1/rubygems/custom\_require.rb:36:in `require': cannot load > > such file -- sensu-plugin/metric/cli (LoadError) > > from /usr/lib/ruby/1.9.1/rubygems/custom\_require.rb:36:in `require' > > from ./cpu-mpstat-metrics.rb:10:in `\' > > > > If I edit the plugin to use the Ruby embedded in Sensu, I get this: > > > > # ./cpu-mpstat-metrics.rb > > Sensu::Plugin::CLI: ["Not implemented! You should override > > Sensu::Plugin::CLI#run."] > > /opt/sensu/embedded/lib/ruby/2.0.0/rubygems/core\_ext/kernel\_require.rb:53:in > > `require': cannot load such file -- linux/kstat (LoadError) > > from > > /opt/sensu/embedded/lib/ruby/2.0.0/rubygems/core\_ext/kernel\_require.rb:53:in > > `require' > > from ./cpu-mpstat-metrics.rb:12:in `\' > > > > Either way, various components are missing, and I need to install them. But > > it seems to me that, if I pick one Ruby and start installing things into it, > > I should stick to it from now on. > > > > What's the generally recommended in this situation?