automatic 8 vol ebs LVM2 stripe set (raid0). 256k chunks, 8-way stripe. 65k readahead.

8_vol_ebs_stripeset.rb

include_recipe "aws"
include_recipe "lvm"
include_recipe "xfs"

esvg = node.elasticsearch.ebs.lvm.volume_group
eslv = node.elasticsearch.ebs.lvm.logical_volume
Chef::Log.info "ElasticSearch: setting up 8 100G EBS volumes"
aws = data_bag_item("aws", node.app_environment)
8.times do |d|
  disk = (d == 0 ? "/dev/sdi" : "/dev/sdi#{d}")
  aws_ebs_volume "ElasticSearch EBS: #{disk}" do
    aws_access_key aws['aws_access_key_id']
    aws_secret_access_key aws['aws_secret_access_key']
    size 100
    device disk
    action [ :create, :attach ]
  end

  execute "LVM: Initialize physical disk '#{disk}'" do
    command "pvcreate #{disk}"
    not_if "pvdisplay #{disk}"
  end

  execute "LVM: Create volume group #{esvg}" do
    command "vgcreate #{esvg} #{disk}"
    not_if "vgdisplay #{esvg}"
  end

  execute "LVM: Extend volume group #{esvg} with #{disk}" do
    command "vgextend #{esvg} #{disk}"
    not_if "pvs --noheadings -o vg_name #{disk} | grep #{esvg}"
  end
end

execute "LVM: Create striped LV #{eslv}" do
  command "lvcreate -i 8 -I 256 -n #{eslv}" +
    " -l 100%FREE #{esvg}"
  not_if "lvdisplay /dev/#{esvg}/#{eslv}"
end

execute "XFS: Format /dev/#{esvg}/#{eslv}" do
  action :nothing
  subscribes :run, resources(:execute => "LVM: Create striped LV #{eslv}"), :immediately
  command "mkfs.xfs /dev/#{esvg}/#{eslv}"
end

directory node.elasticsearch.path.work

execute "blockdev --setra 65536 /dev/mapper/#{esvg}-#{eslv}" do
  not_if "blockdev --getra /dev/mapper/#{esvg}-#{eslv} | grep 65536"
end

mount node.elasticsearch.path.work do
  device "/dev/mapper/#{esvg}-#{eslv}"
  fstype "xfs"
  options "rw,noatime,inode64"
  action :mount
end

ruby_block "update your databagz, yo" do
  block do
    true
  end
end