I install this plugin in /etc/td-agent/out_gelf.rb, but when i run service td-agent restart, Then, this is error
Restarting td-agent: /opt/td-agent/embedded/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- gelf (LoadError)
from /opt/td-agent/embedded/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /etc/td-agent/plugin/out_gelf.rb:15:in `initialize'
from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.29/lib/fluent/plugin.rb:128:in `new'
from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.29/lib/fluent/plugin.rb:128:in `new_impl'
from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.29/lib/fluent/plugin.rb:59:in `new_output'
from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.29/lib/fluent/plugin/out_copy.rb:46:in `block in configure'
from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.29/lib/fluent/plugin/out_copy.rb:39:in `each'
from /opt/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.29/lib/fluent/plugin/out_copy.rb:39:in `configure'
I install this plugin in /etc/td-agent/out_gelf.rb, but when i run service td-agent restart, Then, this is error
look like it require gelf, can someone help me