Graphite – aggregating your second retention bucket

Make sure your storage-aggregator.py is running in order databases to compress down into 2nd and 3rd retention levels.

$ ls
league_number.wsp  user_number.wsp

Find out info on your database “league_number”
Seeing something like xFilesFactor .5 means that 50% of that time retention period has to show
if you have 10 second intervals but are only inputting once every 60 seconds then your xFilesFactor is only .2
Set the xFilesFactor = 0 if you don’t want to drop any of your data

$ /usr/local/bin/whisper-info.py league_number.wsp
maxRetention: 315360000
xFilesFactor: 0.5
aggregationMethod: average
fileSize: 63097960

Archive 0
retention: 21600
secondsPerPoint: 10
points: 2160
size: 25920
offset: 40

Archive 1
retention: 315360000
secondsPerPoint: 60
points: 5256000
size: 63072000
offset: 25960

Resize your whisper database if data is not being aggregated properly

$ /usr/local/bin/whisper-resize.py league_number.wsp
Usage: whisper-resize.py path timePerPoint:timeToStore [timePerPoint:timeToStore]*

timePerPoint and timeToStore specify lengths of time, for example:

60:1440      60 seconds per datapoint, 1440 datapoints = 1 day of retention
15m:8        15 minutes per datapoint, 8 datapoints = 2 hours of retention
1h:7d        1 hour per datapoint, 7 days of retention
12h:2y       12 hours per datapoint, 2 years of retention

If you have fucked up graphs that are truncating data on the second retention size
align them like so

$ /usr/local/bin/whisper-resize.py user_number.wsp --xFilesFactor=0 --aggregationMethod=average 10:6h 1min:10y

Make sure you set your storage-aggregation correctly and make sure it’s started

$ cp storage-aggregation.conf.example storage-aggregation.conf

$ /opt/graphite/bin/carbon-aggregator.py status
carbon-aggregator (instance a) is not running
$ /opt/graphite/bin/carbon-aggregator.py start
Starting carbon-aggregator (instance a)

Adding EBS Volumes with Opscode’s AWS cookbook

1. Download opscode’s aws cookbook and put it into your own cookbook repo

$ git clone https://github.com/opscode/cookbooks.git opscode-cookbooks
$ cp -r opscode-cookbooks/aws my-cookbooks/
$ cd my-cookbooks

2. Create a new cookbook that will utilize the aws cookbook

$ knife cookbook create aws-tests

3. Set the cookbook to have the dependency of the opscode aws cookbook

$ vi my-cookbooks/aws-tests/metadata.rb

maintainer       "YOUR_COMPANY_NAME"
maintainer_email "YOUR_EMAIL"
license          "All rights reserved"
description      "Installs/Configures aws_tests"
long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
version          "0.0.1"

depends "aws"

4. Create your recipe to create and attach a new EBS volume to your ec2 instance

$ vi vi my-cookbooks/aws-tests/recipes/default.rb

# Create and attach your new EBS volume
aws_ebs_volume "new_ebs_volume" do
  aws_access_key "MYAPIKEY"
  aws_secret_access_key "MYAPIKEYSECRET"
  size 1
  device "/dev/xvdi"
  action [ :create, :attach ]
end

5. Create a filesystem and mount your new volume

# Create your partition and filesystem for ext4
bash "create_filesystem" do
  user "root"
  code <<-EOH
    parted /dev/xvdi mklabel gpt
    parted /dev/xvdi mkpart logical ext4 1 -1
    parted /dev/xvdi set 1 lvm on
    yes | parted /dev/xvdi mkpart logical ext4 1 -- "-1"
    mkfs.ext4 /dev/xvdi1
  EOH
  not_if "parted /dev/xvdi1 |grep ext4"
end


directory "/mnt/test" do
  owner "root"
  group "root"
  mode "0755"
  recursive true
end

mount "/mnt/test" do
  device "/dev/xvdi1"
  options "rw noatime"
  fstype "ext4"
  action [ :enable, :mount ]
  not_if "cat /proc/mounts |grep /mnt/test"
end

6. Add aws and aws_tests recipes to your node

$ knife node edit i-fff4f8c

{
  "chef_environment": "_default",
  "name": "i-fff4f8",
  "run_list": [
    "recipe[aws]",
    "recipe[aws_tests]"
  ],
  "normal": {
    "tags": [

    ],
  }
}

7. Run chef-client on your node

$ chef-client

Debugging knife configure -i

If you ever see something like this


root@chefserver01:/etc/chef# knife configure -i -V
Overwrite /root/.chef/knife.rb? (Y/N) y
Please enter the chef server URL: [http://chefserver01:4000]
Please enter a clientname for the new client: [root] jtran7
Please enter the existing admin clientname: [chef-webui]
Please enter the location of the existing admin client's private key: [/etc/chef/webui.pem]
Please enter the validation clientname: [chef-validator]
Please enter the location of the validation key: [/etc/chef/validation.pem]
Please enter the path to a chef repository (or leave blank):
Creating initial API user...
INFO: HTTP Request Returned 500 Internal Server Error: Connection reset by peer
ERROR: Server returned error for http://chefserver01:4000/clients, retrying 1/5 in 4s
INFO: HTTP Request Returned 409 Conflict: Client already exists
INFO: HTTP Request Returned 500 Internal Server Error: Connection reset by peer
ERROR: Server returned error for http://chefserver01:4000/clients/jtran7, retrying 1/5 in 4s
INFO: HTTP Request Returned 500 Internal Server Error: Connection reset by peer
ERROR: Server returned error for http://chefserver01:4000/clients/jtran7, retrying 2/5 in 5s

it’s likely your ampq password is incorrect in /etc/chef/server.rb

# amqp_pass sets the password for the AMQP virtual host in rabbitmq-server.
amqp_pass "testing"

If you had deleted your rabbitmq mnesia table you had to do something like this.
The word “testing” is your ampq password

sudo rabbitmqctl add_vhost /chef
sudo rabbitmqctl add_user chef testing
sudo rabbitmqctl set_permissions -p /chef chef ".*" ".*" ".*"

Clustered AMQP Rabbit-MQ

RabbitMQ already has excellent documentation at: http://www.rabbitmq.com/clustering.html

But this will be a bit more chef specific
server01 = existing chef-server
server02 = new rabbitmq server to be added to cluster

On Server01

On your existing chef-server
*I assume you’re using the latest rabbitmq and that server02 will also install matching version
Check what the cluster output looks like

root@server01:~# rabbitmqctl cluster_status
Cluster status of node rabbit@server01 ..
[{nodes,[{disc,[rabbit@server01]}]},{running_nodes,[rabbit@server01]}]
...done.

Copy your rabbitmq cookie to server02

root@server01:~# scp /var/lib/rabbitmq/.erlang.cookie root@server02:/var/lib/rabbitmq/
Are you sure you want to continue connecting (yes/no)? yes
root@server02's password: 
.erlang.cookie                                                                                        100%   20     0.0KB/s   00:00

On Server02

Install rabbitmq

root@server02:~# echo "deb http://www.rabbitmq.com/debian/ testing main" |tee -a /etc/apt/sources.list
root@server02:~# wget http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
root@server02:~# apt-key add rabbitmq-signing-key-public.asc
root@server02:~# apt-get update
root@server02:/var/chef/cache# apt-get -y install rabbitmq-server

Delete existing mnesia database and start rabbitmq

root@server02:~# service rabbitmq-server stop
root@server02:~# rm -fr /var/lib/rabbitmq/mnesia 
root@server02:~# service rabbitmq-server start
 * Starting message broker rabbitmq-server
   ...done.

Join Server02 to Server01

root@server02:~# rabbitmqctl cluster_status
Cluster status of node rabbit@server02 ...
[{nodes,[{disc,[rabbit@server02]}]},{running_nodes,[rabbit@server02]}]
...done.
root@server02:~# rabbitmqctl stop_app
Stopping node rabbit@server02 ...
...done.
root@server02~# rabbitmqctl reset   
Resetting node rabbit@server02 ...
...done.
root@server02:~# rabbitmqctl cluster rabbit@server01 rabbit@server02
Clustering node rabbit@server02 with [rabbit@server01,rabbit@server02] ...
...done.
root@server02:~# rabbitmqctl start
root@server02:~# rabbitmqctl cluster_status
Cluster status of node rabbit@server01 ...
[{nodes,[{disc,[rabbit@server02,rabbit@server01]}]},
 {running_nodes,[rabbit@server02,rabbit@server01]}]
...done.

Verify on server01 that cluster shows up as expected

root@server01:~# rabbitmqctl cluster_status
Cluster status of node rabbit@server01 ...
[{nodes,[{disc,[rabbit@server02,rabbit@server01]}]},
 {running_nodes,[rabbit@server02,rabbit@server01]}]
...done.

Make sure chef still works

root@server01:~# knife node list

root@server01:~# knife client list
  chef-validator
  chef-webui
  root
  server01
root@server01:~# knife bootstrap -x root server02 --template-file ~/ubuntu12.04.rb 
Bootstrapping Chef on server02
Failed to authenticate root - trying password auth
Enter your password: 
server02 Updating installed gems

root@server01:~# knife node list
server02

Whitelisting AWS Load Balancers

One of the things not obvious how to do in Amazon EC2 is whitelisting traffic to your load balancers.

Here’s how to do it
In your security groups add the inbound traffic to security group “amazon-elb/amazon-elb-sg” for all TCP

Essential Knife Plugins for chef

Knife-Spork:
This plugin helps you control versioning of your cookbooks and also prevents you from accidently commiting things you don’t want to.

$ gem install knife-spork

https://github.com/jonlives/knife-spork

Knife-ec2:
Obviously this is a connector to ec2. I use Amazon ec2 so i am biased

$ gem install knife-ec2

https://github.com/opscode/knife-ec2/

Knife-preflight:
A preflight plugin for Chef::Knife which lets you see which nodes and roles use a particular cookbook before you upload it.

$ gem install knife-preflight

https://github.com/jonlives/knife-preflight

Knife-env-diff:
A plugin for Chef::Knife which will diff the cookbook versions of two or more environments.

$ gem install knife-env-diff

https://github.com/jgoulah/knife-env-diff

Other mentionables

Knife-slapchop:
Threaded bootstrapping of aws nodes
https://github.com/kryptek/knife-slapchop

Knife-ironfan
Cluster Deployments
https://github.com/infochimps-labs/ironfan

Search for more knife plugins:

$ gem search -r knife-

Multiple AWS Accounts with Knife Admin

I Recently stumbled across a predicament of multiple aws accounts.
This is a minor predicament but a predicament nonethless.
I have a situation where i have

1. A personal AWS account

2. A work AWS account

3. A vendor AWS account

These three AWS accounts all use the same chef-server. So to make my life easier i decided to organize them.
I created the following structure:

$ mkdir -p ~/chef-aws/{personal,work,thirdparty}/.chef

I copied my knife.rb from ~/.chef/knife.rb into each of these folders.

$ cp -p ~/.chef/knife.rb ~/chef-aws/personal
$ cp -p ~/.chef/knife.rb ~/chef-aws/work
$ cp -p ~/.chef/knife.rb ~/chef-aws/thirdparty

Here’s an example of the knife.rb file
You can find details on setting up knife with ec2 here : Knife-EC2 Configuration


current_dir = File.dirname(__FILE__)
log_level                :info
log_location             STDOUT
node_name                "neosirex"
client_key               "/home/James/.chef/myuser.pem"
validation_client_name   "neosirex-validator"
validation_key           "/home/James/.chef/random-validator.pem"
chef_server_url          "https://api.opscode.com/organizations/somemakebelieveaccount"
cache_type               'BasicFile'
cache_options( :path => "#{ENV['HOME']}/.chef/checksums" )
cookbook_path            ["#{current_dir}/../cookbooks"]

Here’s the snippet that’s added to each AWS specific knife.rb

knife[:aws_access_key_id] ='< AWS ACCESS KEY GOES HERE >'
knife[:aws_secret_access_key] ='< AWS SECRET KEY GOES HERE >'

So now in order to use different AWS accounts what i do is change into each of those aws directories and run knife commands from there.
Each of the following commands would give me the output only of the relevant AWS server

$ cd ~/chef-aws/personal && knife ec2 server list
$ cd ~/chef-aws/work && knife ec2 server list
$ cd ~/chef-aws/thirdparty && knife ec2 server list

I Leave my default ~/.chef/knife.rb file without AWS credentials in it.
This is because i don’t want to accidently deploy to the wrong AWS account.
There’s still room for human error but i suppose it’s better than nothing
If someone has a better approach to this i’d like to know about it.

Hash Keys and Values in General Ruby

Create a new Hash

node = Hash.new

Create a new Hash of Hash

node[:one] = Hash.new

Insert Values into your Hash of Hash

node[:one][:object] = "number1"
node[:one][:block] = "number2"

Print Key and Value

node[:one].each_pair do |k,v|
  puts k
  puts v
end

Print Keys only

node[:one].keys.each do |key|
  puts key
end

Print Values Only

node[:one].values.each do |value|
  puts value
end

Keys and Values from Hashes in Ruby Templates

Reference: http://ruby-doc.org/stdlib-1.9.3/libdoc/erb/rdoc/ERB.html
ERB recognizes certain tags in the provided template and converts them based on the rules below:

<% Ruby code -- inline with output %>
<%= Ruby expression -- replace with result %>
<%# comment -- ignored -- useful in testing %>
% a line of Ruby code -- treated as <% line %> (optional -- see ERB.new)
%% replaced with % if first thing on a line and % processing is used
<%% or %%> -- replace with <% or %> respectively

Create a new “motd” cookbook

$ knife cookbook create motd

Example: ~/cookbooks/motd/recipes/default.rb

#
# Cookbook Name:: motd
# Recipe:: default
#
# Copyright 2012, YOUR_COMPANY_NAME
#
# All rights reserved - Do Not Redistribute
#

template "/home/motd" do
  source "motd.erb"
  owner "root"
end

Example: ~/cookbooks/motd/template/default/motd.erb
* You can find out what hashes are defined on a system by running “ohai”

Hostname : <%= node["hostname"] %>
Platform : <%= node["platform"] %>

Memory Usage
<% node["memory"].each_pair do |k,v| %>
<%= k %>     : <%= v%>
<% end %>

Block Devices
<% node["block_device"].each_pair do |k,v| %>
Key: <%= k %>   -   <%= v%>
<% end %>

Network Info
<% node["network"]["interfaces"].keys.each do |k| %>
Key: <%= k %>
<% end %>

<% node["network"]["interfaces"].values.each do |v| %>
Value: <%= v %>
<% end %>

Run chef-client with the “motd” cookbook installed and look at the output at

$ cat /home/motd

Hostname: ubuntu01
Platform: ubuntu

Memory Usage
vmalloc_total     : 34359738367kB
anon_pages     : 129892kB
writeback     : 0kB
dirty     : 0kB
vmalloc_used     : 266104kB
vmalloc_chunk     : 34359469948kB
active     : 186264kB
buffers     : 31252kB
commit_limit     : 773540kB
nfs_unstable     : 0kB
slab_unreclaim     : 11684kB
bounce     : 0kB
slab_reclaimable     : 17644kB
mapped     : 11580kB
cached     : 190268kB
slab     : 29328kB
inactive     : 165136kB
free     : 105708kB
total     : 502612kB
committed_as     : 926460kB
page_tables     : 4324kB
swap     : cached0kBfree522236kBtotal522236kB

Block Devices
Key: sda   -   timeout30modelVMware Virtual Sremovable0vendorVMware,rev1.0size41943040staterunning
Key: sr0   -   timeout30modelVMware IDE CDR10removable1vendorNECVMWarrev1.00size1401432staterunning
Key: fd0   -   removable1size0
Key: loop7   -   removable0size0
Key: loop6   -   removable0size0
Key: loop5   -   removable0size0
Key: loop4   -   removable0size0
Key: loop3   -   removable0size0
Key: loop2   -   removable0size0
Key: loop1   -   removable0size0
Key: loop0   -   removable0size0
Key: ram15   -   removable0size131072
Key: ram14   -   removable0size131072
Key: ram13   -   removable0size131072
Key: ram12   -   removable0size131072
Key: ram11   -   removable0size131072
Key: ram10   -   removable0size131072
Key: ram9   -   removable0size131072
Key: ram8   -   removable0size131072
Key: ram7   -   removable0size131072
Key: ram6   -   removable0size131072
Key: ram5   -   removable0size131072
Key: ram4   -   removable0size131072
Key: ram3   -   removable0size131072
Key: ram2   -   removable0size131072
Key: ram1   -   removable0size131072
Key: ram0   -   removable0size131072

Network Info
Key: eth0
Key: lo

Value: mtu16436encapsulationLoopbackflagsLOOPBACKUPLOWER_U....< i truncated output >
Value: mtu1500typeethencapsulationEthernetflagsBROADCASTM....< i truncated output >

Also for shits and giggles
Example Ohai output:

root@ubuntu01:~# ohai

{
  "idletime": "35 minutes 35 seconds",
  "uptime": "36 minutes 47 seconds",
  "dmi": {
    "base_board": {
      "chassis_handle": "0x0000",
      "location_in_chassis": "Not Specified",
      "product_name": "440BX Desktop Reference Platform",
      "serial_number": "None",
      "manufacturer": "Intel Corporation",
      "version": "None",
      "type": "Unknown",
      "features": "None",
      "contained_object_handles": "0",
      "all_records": [
  .. < i truncated output >

Ubuntu/Debian Preseeding with LVM

When you have your ubuntu or debian splash screen hit “tab”
then append:

auto url=http://mywebserver/mypreseed.cfg

You can use this example to bring up a quick webserver to server your preseed file: Python Simple HTTP Server

You’ll still probably be prompted for all the locale information because that is requested BEFORE debian/ubuntu loads the preseed configuration. ( yes , dumb i know ). These are the settings that don’t get pulled in.

# keyboard and locale settings
####################################################################

d-i debian-installer/locale string en_US
d-i console-keymaps-at/keymap select sg-latin1

# networking
####################################################################

d-i netcfg/disable_dhcp boolean false
d-i netcfg/get_hostname string localhost
d-i netcfg/get_domain string localdomain
d-i netcfg/choose_interface select eth0

You can get around this by rebuilding your boot cdrom or doing a pxe install that loads all the info ahead of time.

Example

auto url=http://mywebserver/mypreseed.cfg \
locale=en_US console-keymaps-at/keymap=sg-latin1 \
interface=eth0 hostname=localhost domain=localdomain --

Now for actually making your preseed config

Setup Locale info

d-i     debian-installer/locale string en_US
d-i     console-setup/ask_detect boolean false
d-i     time/zone string UTC
d-i     debian-installer/splash boolean false
d-i     debian-installer/language string en
d-i     debain-installer/country string US
d-i     console-keymaps-at/keymap select sg-latin1

Setup Your Networking

d-i     netcfg/get_nameservers  string 192.168.1.5
d-i     netcfg/get_ipaddress    string 192.168.1.10
d-i     netcfg/get_netmask      string 255.255.255.0
d-i     netcfg/get_gateway      string 192.168.1.1
d-i     netcfg/confirm_static   boolean true
d-i     netcfg/get_hostname string tempnode
d-i     netcfg/get_domain string localdomain

Setup your Repository and what directory in the repo to look for your install files

d-i     mirror/country string manual
d-i     mirror/http/hostname string http.us.debian.org
d-i     mirror/http/directory string /debian
d-i     mirror/http/proxy string

Partition Your disks and set them up as lvm

d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string lvm
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/device_remove_lvm_span boolean true
d-i partman-auto/purge_lvm_from_device  boolean true
d-i partman-auto-lvm/new_vg_name string system

Setup your logical Volumes in LVM and also non-lvm partitions
This will make
* BEWARE OF YOUR FORMATTING OF THIS PART – IT IS SUPER SENSITIVE

/boot : is a bootable filesystem with 300mb and ext3
/ : Is between 10GB and grows to the end of the disk and ext3
swap : uses 200% of the size of system ram for a disk or 8GB

#d-i partman-auto/init_automatically_partition \
#  select Guided - use entire disk and set up LVM
d-i partman-auto/expert_recipe string                         \
      boot-root ::                                            \
              40 300 300 ext3                                 \
                      $primary{ }                             \
                      $bootable{ }                            \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext3 }    \
                      mountpoint{ /boot }                     \
              .                                               \
              2000 10000 1000000000 ext3                      \
                      $lvmok{ }                               \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext3 }    \
                      mountpoint{ / }                         \
              .                                               \
              8000 8000 200% linux-swap                       \
                      $lvmok{ }                               \
                      method{ swap } format{ }                \
              .

Here’s another LVM Example

d-i partman-auto/expert_recipe string                         \
      boot-root ::                                            \
              40 300 300 ext4                                 \
                      $primary{ }                             \
                      $bootable{ }                            \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext4 }    \
                      mountpoint{ /boot }                     \
              .                                               \
              2000 10000 1000000000 ext4                      \
                      $lvmok{ }                               \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext4 }    \
                      mountpoint{ / }                         \
              .                                               \
              2000 1000 10000 ext4                            \
                      $lvmok{ }                               \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext4 }    \
                      mountpoint{ /var }                      \
              .                                               \
              2000 1000 60000 ext4                            \
                      $lvmok{ }                               \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext4 }    \
                      mountpoint{ /var/lib/mysql }                      \
              .                                               \
              2000 1000 30000 ext4                            \
                      $lvmok{ }                               \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext4 }    \
                      mountpoint{ /www }                      \
              .                                               \
              8000 8000 200% linux-swap                       \
                      $lvmok{ }                               \
                      method{ swap } format{ }                \
              .

Answer yes to all the partition and LVM prompts

d-i partman-lvm/confirm boolean true
d-i partman/confirm_write_new_label boolean true
d-i partman/choose_partition select Finish partitioning and write changes to disk
d-i partman/confirm boolean true

Setup your Time Zone info

d-i     clock-setup/utc boolean true
d-i     clock-setup/ntp boolean true
d-i     clock-setup/ntp-server  string ntp.ubuntu.com
d-i     time/zone string US/Los_Angeles

Setup Root and First User info

d-i     base-installer/kernel/image     string linux-server
d-i     passwd/root-login       boolean true
d-i     passwd/root-password-crypted    password $1$VuPOoDRD$seX.C54E8TUdMkaAmKvjx0
d-i     passwd/user-fullname string Ubuntu User
d-i     passwd/username string ubuntu
d-i     passwd/user-password-crypted password $1$NvFY8IuR$BGqOozSN91ljvQB.pVLDw.
d-i     user-setup/encrypt-home boolean false
d-i     user-setup/allow-password-weak  boolean true
d-i     passwd/user-default-groups      string adm cdrom dialout lpadmin plugdev sambashare

Miscellaneous Stuffage

d-i     apt-setup/services-select       multiselect security
d-i     debian-installer/allow_unauthenticated  string true
d-i     pkgsel/upgrade  select safe-upgrade
d-i     pkgsel/language-packs   multiselect
d-i     pkgsel/update-policy    select none
d-i     pkgsel/updatedb boolean true
popularity-contest popularity-contest/participate boolean false
tasksel tasksel/first multiselect standard, openssh-server
d-i     grub-installer/skip     boolean false
d-i     lilo-installer/skip     boolean false
d-i     grub-installer/only_debian      boolean true
d-i     grub-installer/with_other_os    boolean false
d-i     finish-install/keep-consoles    boolean false
d-i     finish-install/reboot_in_progress       note
d-i     cdrom-detect/eject      boolean true
d-i     debian-installer/exit/halt      boolean false
d-i     debian-installer/exit/poweroff  boolean false

Choose your packages to install

d-i     pkgsel/include string vim openssh-server

What it looks like as one file:

d-i     debian-installer/locale string en_US
d-i     console-setup/ask_detect boolean false
d-i     time/zone string UTC
d-i     debian-installer/splash boolean false
d-i     debian-installer/language string en
d-i     debain-installer/country string US
d-i     netcfg/get_nameservers  string 192.168.1.5
d-i     netcfg/get_ipaddress    string 192.168.1.10
d-i     netcfg/get_netmask      string 255.255.255.0
d-i     netcfg/get_gateway      string 192.168.1.1
d-i     netcfg/confirm_static   boolean true
d-i     netcfg/get_hostname string tempnode
d-i     mirror/country string manual
d-i     mirror/http/hostname string http.us.debian.org
d-i     mirror/http/directory string /debian
d-i     mirror/http/proxy string
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string lvm
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/device_remove_lvm_span boolean true
d-i partman-auto/purge_lvm_from_device  boolean true
d-i partman-auto-lvm/new_vg_name string system
#d-i partman-auto/init_automatically_partition \
#  select Guided - use entire disk and set up LVM
d-i partman-auto/expert_recipe string                         \
      boot-root ::                                            \
              40 300 300 ext3                                 \
                      $primary{ }                             \
                      $bootable{ }                            \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext3 }    \
                      mountpoint{ /boot }                     \
              .                                               \
              2000 10000 1000000000 ext3                      \
                      $lvmok{ }                               \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ ext3 }    \
                      mountpoint{ / }                         \
              .                                               \
              8000 8000 200% linux-swap                       \
                      $lvmok{ }                               \
                      method{ swap } format{ }                \
              .

d-i partman-lvm/confirm boolean true
d-i partman/confirm_write_new_label boolean true
d-i partman/choose_partition select Finish partitioning and write changes to disk
d-i partman/confirm boolean true
d-i     clock-setup/utc boolean true
d-i     clock-setup/ntp boolean true
d-i     clock-setup/ntp-server  string ntp.ubuntu.com
d-i     time/zone string US/Los_Angeles
d-i     base-installer/kernel/image     string linux-server
d-i     base-installer/kernel/image     string linux-server
d-i     passwd/root-login       boolean true
d-i     passwd/root-password-crypted    password $1$VuPOoDRD$seX.C54E8TUdMkaAmKvjx0
d-i     passwd/user-fullname string Ubuntu User
d-i     user-setup/allow-password-weak  boolean true
d-i     user-setup/encrypt-home boolean false
d-i     passwd/user-default-groups      string adm cdrom dialout lpadmin plugdev sambashare
d-i     apt-setup/services-select       multiselect security
d-i     debian-installer/allow_unauthenticated  string true
d-i     pkgsel/upgrade  select safe-upgrade
d-i     pkgsel/language-packs   multiselect
d-i     pkgsel/update-policy    select none
d-i     pkgsel/updatedb boolean true
popularity-contest popularity-contest/participate boolean false
tasksel tasksel/first multiselect standard, openssh-server
d-i     grub-installer/skip     boolean false
d-i     lilo-installer/skip     boolean false
d-i     grub-installer/only_debian      boolean true
d-i     grub-installer/with_other_os    boolean false
d-i     finish-install/keep-consoles    boolean false
d-i     finish-install/reboot_in_progress       note
d-i     cdrom-detect/eject      boolean true
d-i     debian-installer/exit/halt      boolean false
d-i     debian-installer/exit/poweroff  boolean false
d-i     pkgsel/include string vim openssh-server

Info for this was stolen here ( Thanks ):
http://cptyesterday.wordpress.com/2012/06/17/notes-on-using-expert_recipe-in-debianubuntu-preseed-files/

Preseed Example files found here:

https://github.com/cookingclouds/Preseed