mongodb on ebs

90-ebs.rules.erb

<% unless @prefixes.nil? -%>
<% @prefixes.each do |pfx| -%>
ACTION=="add", KERNEL=="<%= pfx %>", ATTR{bdi/read_ahead_kb}="32"
<% end -%>
<% end -%>
<% unless @raid_dev.nil? -%>
ACTION=="add", KERNEL=="<%= @raid_dev %>", ATTR{bdi/read_ahead_kb}="32"
<% end -%>

mongodb.rb

package "numactl"

if node.attribute?('ec2')
  unless node['mongodb']['client_only']
    directory "/data"
    directory "/var/lib/mongodb"

    Chef::Log.info node[:aws].inspect
    node.set_unless[:aws][:raid][:size] = 0
    node.set_unless[:aws][:raid][:count] = 4
    node.set_unless[:aws][:raid][:level] = 0
    node.set_unless[:aws][:raid][:mount_point] = '/data'

    disk_count = node[:aws][:raid][:count].to_i
    disk_size = node[:aws][:raid][:size].to_i / disk_count
    mount_point = node[:aws][:raid][:mount_point]
    node.set_unless[:aws][:raid][:piops_ratio] = 10
    node.set_unless[:aws][:raid][mount_point][:filesystem] = 'xfs'

    snapshots = node[:aws][:raid].has_key?('snapshots') ? node[:aws][:raid][:snapshots] : nil
    unless disk_size == 0
      aws_ebs_raid 'db_ebs_volume' do
        disk_size disk_size.ceil
        disk_count disk_count
        level node[:aws][:raid][:level]
        filesystem node[:aws][:raid][mount_point][:filesystem]
        disk_type "io1"
        disk_piops (disk_size * node[:aws][:raid][:piops_ratio]).ceil
        snapshots snapshots
        mount_point node[:aws][:raid][:mount_point]
      end
    end

    mount mount_point do
      device lazy { "/dev/#{node[:aws][:raid][mount_point][:raid_dev]}" }
      fstype lazy { node[:aws][:raid][mount_point][:filesystem] }
      action :enable
    end

    directory "#{mount_point}/mongodb" do
      action :create
    end

    mount "/var/lib/mongodb" do
      device "#{mount_point}/mongodb"
      fstype "none"
      options "bind,rw"
      action [ :enable, :mount ]
    end

    execute "set readahead on block devices" do
      command lazy { "blockdev --setra 64 #{node[:aws][:raid][mount_point][:device_map].keys.collect {|d| d.gsub(/sd/,'/dev/xvd')}.join(' ')} /dev/#{node[:aws][:raid][mount_point][:raid_dev]}" }
    end
  end

  template "/etc/udev/rules.d/90-ebs.rules" do
    source "90-ebs.rules.erb"
    owner "root"
    group "root"
    variables( lazy {
        { :prefixes => node[:aws][:raid][mount_point][:device_map].keys.collect {|d| d.gsub(/sd/,'xvd')},
        :raid_dev => node[:aws][:raid][mount_point][:raid_dev] }
    } )
    action :create
  end
end

if node['mongodb']['upgrade']
  include_recipe "ascent-wrappers::mongodb_upgrade"
else
  include_recipe "ascent-wrappers::mongodb_install"
end