Production Plone HAProxy and Pound Buildout

After much trial and error, I finally got a great setup. I end up ditching Pound because of an IE6 bug. I officially have extended load balancing experience.

buildout.cfg

# ref: http://myriadicity.com/Sundry/PloneBlobs#as-we-did-with-the-standalone-instance
# production

[buildout]
parts =
    poundbuild
    configpound
    plone
    zope2
    zeoserver
    client1
    client2
    client3
    client4
    instance
    productdistros

find-links =
    http://dist.plone.org
    http://download.zope.org/ppix/
    http://download.zope.org/distribution/
    http://effbot.org/downloads

eggs =
    elementtree
    Products.DocFinderTab
    Products.RichDocument
    Products.PloneFormGen
    Products.Clouseau
    collective.contentleadimage
    stxnext.pdb
    plone.reload
    Products.RedirectionTool
    Products.FCKeditor
    Products.LinguaPlone<=2.4
    myproj.theme
    myproj.productcatalog
    myproj.portlet.loginform
    myproj.pas.auth
    myproj.portlet.statictext
    Products.CacheSetup

# Reference any eggs you are developing here, one per line
# e.g.: develop = src/my.package
develop =
    src/collective.contentleadimage
    src/myproj.theme
    src/myproj.productcatalog
    src/myproj.portlet.loginform
    src/myproj.pas.auth
    src/myproj.portlet.statictext
    
[plone]
recipe = plone.recipe.plone>=3.1.1,<3.2dev

[poundbuild]
recipe = plone.recipe.pound:build
url = http://www.apsis.ch/pound/Pound-2.4.5.tgz

[configpound]
# info: http://pypi.python.org/pypi/plone.recipe.pound/0.5.5
recipe = plone.recipe.pound:config
alive = 60
sessiontimeout = 1200000
sessioncookie = _ZopeId
sticky = on
balancers =
    clients 127.0.0.1:8000 127.0.0.1:8081 127.0.0.1:8082 127.0.0.1:8083 127.0.0.1:8084
    
[zope2]
recipe = plone.recipe.zope2install
url = ${plone:zope2-url}

[productdistros]
recipe = plone.recipe.distros
urls =
    http://www.plone4artists.org/products/plone4artistsvideo/releases/1.1/Plone4ArtistsVideo-plone3-bundle-1.1.tar.gz
    http://plone.org/products/collage/releases/1.1/collage-1.1.tar.gz
    http://plone.org/products/pressroom/releases/3.1/pressroom-3-1.tgz
    http://plone.org/products/scrawl/releases/1.0/scrawl-1-0.tgz
    http://internap.dl.sourceforge.net/sourceforge/quintagroup/qSEOptimizer-1.5.1.tar.gz

nested-packages =
    Plone4ArtistsVideo-plone3-bundle-1.1
    Plone4ArtistsCalendar-1.1-plone3.0-bundle
    
version-suffix-packages =

[site]
zeo-address = 8100
debug-http-address = 81
var = ${buildout:directory}/var
products = ${buildout:directory}/products
effective-user = zope

[zeoserver]
recipe = plone.recipe.zope2zeoserver
zope2-location = ${zope2:location}
zeo-address = ${site:zeo-address}
zeo-var = ${site:var}
effective-user = ${site:effective-user}
cache-size = 1048MB

[client1]
recipe = plone.recipe.zope2instance
zope2-location = ${zope2:location}
zeo-client = True
zeo-address = ${zeoserver:zeo-address}
user = admin:changemenow
http-address = 8081
effective-user = ${site:effective-user}
debug-mode = off
verbose-security = off
zodb-cache-size = 12000
zeo-client-cache-size = 350MB
deprecation-warnings = off
session-timeout-minutes = 20
zserver-threads = 1

eggs =
    ${buildout:eggs}
    ${plone:eggs}

zcml =
    myproj.theme
    myproj.theme-overrides
    myproj.productcatalog
    plone.reload
    stxnext.pdb
    collective.contentleadimage
    myproj.portlet.loginform
    myproj.pas.auth
    myproj.portlet.statictext
    
products =
    ${buildout:directory}/products
    ${productdistros:location}
    ${plone:products}
    
extra-paths = ${zope2:location}/lib/python

zope-conf-additional =
    session-resolution-seconds 100
      
[client2]
recipe = collective.recipe.zope2cluster
instance-clone = client1
http-address = 8082
  
[client3]
recipe = collective.recipe.zope2cluster
instance-clone = client1
http-address = 8083

[client4]
recipe = collective.recipe.zope2cluster
instance-clone = client1
http-address = 8084

[instance]
recipe = plone.recipe.zope2instance
zope2-location = ${zope2:location}
user = admin:changemenow
http-address = ${site:debug-http-address}
debug-mode = on
verbose-security = on
products = ${client1:products}
eggs = ${client1:eggs}
zcml = ${client1:zcml}
extra-paths = ${client1:extra-paths}
effective-user = ${site:effective-user}

haproxy.cfg

global
 maxconn     7000 # Total Max Connections
 daemon
 nbproc 1
 log 127.0.0.1 local0
 log 127.0.0.1 local1 debug

defaults
    mode        http
 log global
    option abortonclose
    timeout client  30s
    timeout server  1m
    timeout connect  1m
    timeout queue 1m
    timeout http-request 3m
    option httpclose # Disable Keepalive
    retries 2
 timeout check 30s
    #option redispatch
    option clitcpka
    #option dontlog-normal
    option httplog
 #option tcplog
 
frontend zopecluster
    bind 127.0.0.1:8000
    default_backend zope
    capture cookie _ZopeId len 40

backend zope
    appsession _ZopeId len 33 timeout 20m
    balance roundrobin
    cookie _ZopeId prefix
    ## Define your servers to balance
    server server1 127.0.0.1:8081 cookie wwwck1 weight 7 
    server server2 127.0.0.1:8082 cookie wwwck2 weight 7
    server server3 127.0.0.1:8083 cookie wwwck3 weight 7
    server server4 127.0.0.1:8084 cookie wwwck4 weight 7
    #server server4 127.0.0.1:8085 cookie wwwck5 weight 7

Prod system: Plone 3, quad-core Xenon CPU, 8GB of RAM.
Mileage may vary.