HA-Proxy für Plone via Buildout

Vorbereitung

Voraussetzung:
- Python muss installiert sein
- Entwicklungswerkzeuge (gcc usw.)

Verzeichnis anlegen, rein da und bootstrap.py herunterladen

mkdir -p /opt/haproxy
cd /opt/haproxy
wget https://bootstrap.pypa.io/bootstrap-buildout.py

Jetzt die buildout.cfg mit folgendem Inhalt anlegen (user, group und bind ggf. anpassen):

[buildout]
parts =
 haproxy-build
 haproxy-conf

[haproxy-build]
recipe = plone.recipe.haproxy
url = http://www.haproxy.org/download/2.3/src/haproxy-2.3.7.tar.gz
target = generic


[haproxy-conf]
recipe = collective.recipe.template
input = ${buildout:directory}/haproxy.conf.in
output = ${buildout:directory}/etc/haproxy.conf
maxconn = 24000
user = nobody
group = nogroup
bind = 0.0.0.0:8180

Und eine haproxy.conf.in mit diesem Inhalt anlegen:

global
 log 127.0.0.1 local6
 maxconn  ${haproxy-conf:maxconn}
 daemon
 nbproc 1

defaults
 mode http
 option httpclose
 # Remove requests from the queue if people press stop button
 option abortonclose
 # Try to connect this many times on failure
 retries 3
 # If a client is bound to a particular backend but it goes down,
 # send them to a different one
 option redispatch
 monitor-uri /haproxy-ping

 timeout connect 7s
 timeout queue   300s
 timeout client  300s
 timeout server  300s

 # Enable status page at this URL, on the port HAProxy is bound to
 stats enable
 stats uri /haproxy-status
 stats refresh 5s
 stats realm Haproxy statistics

frontend zopecluster
 bind ${haproxy-conf:bind}
 default_backend zope

# Load balancing over the zope instances
backend zope
 # Use Zope's __ac cookie as a basis for session stickiness if present.
 appsession __ac len 32 timeout 1d
 # Otherwise add a cookie called "serverid" for maintaining session stickiness.
 # This cookie lasts until the client's browser closes, and is invisible to Zope.
 cookie serverid insert nocache indirect
 # If no session found, use the roundrobin load-balancing algorithm to pick a backend.
 balance roundrobin
 # Use / (the default) for periodic backend health checks
 option httpchk

 # Server options:
 # "cookie" sets the value of the serverid cookie to be used for the server
 # "maxconn" is how many connections can be sent to the server at once
 # "check" enables health checks
 # "rise 1" means consider Zope up after 1 successful health check
 server servername1 192.168.0.1:8080 cookie cookie1 check maxconn 2 rise 1
 server servername2 192.168.0.2:8080 cookie cookie2 check maxconn 2 rise 1

Installation

Jetzt noch ein bootstrap.py aufrufen um die buildout-Umgebung zu generieren, dann ein buildout und der HA-Proxy kann gestartet werden

python bootstrap-buildout.py
bin/buildout

Starten

/opt/haproxy/bin/haproxy -D -f /opt/haproxy/etc/haproxy.conf -p /var/run/haproxy.pid