t1.micro で作成
$ ssh ec2-user@xxx.xxx.xxx.xxx
$ sudo su - root
# yum update
# yum install ruby-devel git gcc-c++ libxml2-devel libxslt-devel
$ adduser newrelic
$ su - newrelic
$ gem install bundler
$ git clone https://github.com/newrelic-platform/newrelic_aws_cloudwatch_plugin.git newrelic_aws
$ cd newrelic_aws
$ bundle install