class { 'mackerel_agent':
  apikey              => 'Your API Key',
  roles               => ['service:web', 'service:database'],
  host_status         => {
    on_start => 'working',
    on_stop  => 'poweroff'
  },
  ignore_filesystems  => '/dev/ram.*',
  use_metrics_plugins => true,
  use_check_plugins   => true,
  metrics_plugins     => {
    apache2     => '/usr/local/bin/mackerel-plugin-apache2',
    php-opcache => '/usr/local/bin/mackerel-plugin-php-opcache'
  },
  check_plugins       => {
    access_log => '/usr/local/bin/check-log --file /var/log/access.log --pattern FATAL',
    check_cron => '/usr/local/bin/check-procs -p crond'
    check_ssh  => {
      command               => 'ruby /path/to/check-ssh.rb',
      notification_interval => '60',
      max_check_attempts    => '3',
      check_interval        => '5'
    }
  }
}