Recipe to create a bunch of sensu checks from attributes

check_chef_convergence.rb

# non-converge checks
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['chef_client']['command'] = "check-chef-nodes.rb -U #{Chef::Config[:chef_server_url]} -C :::chef.client.node|#{node.name}::: -K /etc/sensu/conf.d/chef-client.pem -t 1800"
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['chef_client']['handlers'] = ['pagerduty']
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['chef_client']['subscribers'] = ['chef_server']
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['chef_client']['interval'] = 60
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['chef_client']['additional'] = {
  'pager_team' => 'non_urgent',
  'notification' => 'A chef client is not converging',
  'occurrences' => 2,
  'subdue' => {
    'days' => {
      'all' => [
        {
          'begin' => '6PM PST',
          'end' => '10AM PST'
        }
      ]
    }
  }
}

check_ping_four8s.rb

default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_four8s']['command'] = 'check-ping.rb -h 8.8.8.8 -T 5'
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_four8s']['handlers'] = ['pagerduty']
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_four8s']['subscribers'] = ['base']
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_four8s']['interval'] = 5
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_four8s']['additional'] = {
  'pager_team' => 'urgent',
  'notification' => 'cant reach 8.8.8.8',
  'occurrences' => 13
}

check_ping_google.rb

default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_google']['command'] = 'check-ping.rb -h google.com -T 5'
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_google']['handlers'] = ['pagerduty']
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_google']['subscribers'] = ['base']
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_google']['interval'] = 5
default['MY_CUSTOM_NAMESPACE']['sensu']['checks']['ping_google']['additional'] = {
  'pager_team' => 'urgent',
  'notification' => 'cant reach google.com',
  'occurrences' => 13
}

generate_checks_from_attribs.rb

node['MY_CUSTOM_NAMESPACE']['sensu']['checks'].each do |name, check|
  sensu_check name do
    if check['command']
      if node['MY_CUSTOM_NAMESPACE']['sensu']['checks'][name]['custom']
        command "#{node['sensu']['directory']}/plugins/" + check['command']
      else
        command check['command']
      end
    else
      Chef::Log.error "Unable to find a command for check: #{name}"
    end
    if check['handlers']
      handlers check['handlers']
    else
      Chef::Log.info "Warning there are no handlers defined for check: #{name}"
    end
    if check['subscribers']
      subscribers check['subscribers']
    else
      Chef::Log.error "Unable to find a subscriber for check: #{name}"
    end
    if check['interval']
      interval check['interval']
    else
      Chef::Log.info "No defined interval for check: #{name}, using default of #{node['MY_CUSTOM_NAMESPACE']['sensu']['check_interval']}"
      interval node['MY_CUSTOM_NAMESPACE']['sensu']['check_interval']
    end

    publish check['publish'] unless check['publish'].nil?

    if check['additional']
      additional check['additional']
    else
      Chef::Log.error "No defined addtional for check: #{name}, this includes occurances, notification message, etc."
    end
    # use unless nil instead of if because its a bool value
    standalone check['standalone'] unless check['standalone'].nil?
    if check['low_flap_threshold'] && check['high_flap_threshold']
      if check['high_flap_threshold'] > check['low_flap_threshold']
        low_flap_threshold check['low_flap_threshold']
        high_flap_threshold check['high_flap_threshold']
      end
    end

    only_if do
      # Generate all checks on sensu server, base checks, or checks that are in the intersection of roles and subscribers.
      (node['roles'].include? 'sensu_server')\
      || (check['subscribers'].include? 'base')\
      || (!node['MY_CUSTOM_NAMESPACE']['sensu']['roles'].nil?\
      && !(check['subscribers'] & node['MY_CUSTOM_NAMESPACE']['sensu']['roles']).empty?)
    end
  end
end