Description

Installs haproxy and prepares the configuration location.

Requirements

Platform

• Ubuntu (10.04+ due to config option change)
• Debian (6.0+)

Attributes

• node['haproxy']['incoming_address'] - sets the address to bind the haproxy process on, 0.0.0.0 (all addresses) by default
• node['haproxy']['incoming_port'] - sets the port on which haproxy listens
• node['haproxy']['member_port'] - the port that member systems will be listening on, default 80
• node['haproxy']['app_server_role'] - used by the app_lb recipe to search for a specific role of member systems. Default webserver.
• node['haproxy']['balance_algorithm'] - sets the load balancing algorithm; defaults to roundrobin.
• node['haproxy']['enable_ssl'] - whether or not to create listeners for ssl, default false
• node['haproxy']['ssl_incoming_address'] - sets the address to bind the haproxy on for SSL, 0.0.0.0 (all addresses) by default
• node['haproxy']['ssl_member_port'] - the port that member systems will be listening on for ssl, default 8443
• node['haproxy']['ssl_incoming_port'] - sets the port on which haproxy listens for ssl, default 443
• node['haproxy']['httpchk'] - used by the app_lb recipe. If set, will configure httpchk in haproxy.conf
• node['haproxy']['ssl_httpchk'] - used by the app_lb recipe. If set and enable_ssl is true, will configure httpchk in haproxy.conf for the ssl_application section
• node['haproxy']['enable_admin'] - whether to enable the admin interface. default true. Listens on port 22002.
• node['haproxy']['admin']['address_bind'] - sets the address to bind the administrative interface on, 127.0.0.1 by default
• node['haproxy']['admin']['port'] - sets the port for the administrative interface, 22002 by default
• node['haproxy']['pid_file'] - the PID file of the haproxy process, used in the tuning recipe.
• node['haproxy']['defaults_options'] - an array of options to use for the config file's defaults stanza, default is ["httplog", "dontlognull", "redispatch"]
• node['haproxy']['defaults_timeouts']['connect'] - connect timeout in defaults stanza
• node['haproxy']['defaults_timeouts']['client'] - client timeout in defaults stanza
• node['haproxy']['defaults_timeouts']['server'] - server timeout in defaults stanza
• node['haproxy']['x_forwarded_for'] - if true, creates an X-Forwarded-For header containing the original client's IP address. This option disables KeepAlive.
• node['haproxy']['member_max_connections'] - the maxconn value to be set for each app server
• node['haproxy']['user'] - user that haproxy runs as
• node['haproxy']['group'] - group that haproxy runs as
• node['haproxy']['global_max_connections'] - in the app_lb config, set the global maxconn
• node['haproxy']['member_max_connections'] - in both configs, set the maxconn per member
• node['haproxy']['frontend_max_connections'] - in the app_lb config, set the the maxconn per frontend member
• node['haproxy']['frontend_ssl_max_connections'] - in the app_lb config, set the maxconn per frontend member using SSL

Recipes

default

Sets up haproxy using statically defined configuration. To override the configuration, modify the templates/default/haproxy.cfg.erb file directly, or supply your own and override the cookbook and source by reopening the template[/etc/haproxy/haproxy.cfg] resource.

app_lb

Sets up haproxy using dynamically defined configuration through search. See Usage below.

tuning

Uses the community cpu cookbook's cpu_affinity LWRP to set affinity for the haproxy process.

Usage

Use either the default recipe or the app_lb recipe.

When using the default recipe, modify the haproxy.cfg.erb file with listener(s) for your sites/servers.

The app_lb recipe is designed to be used with the application cookbook, and provides search mechanism to find the appropriate application servers. Set this in a role that includes the haproxy::app_lb recipe. For example,

name "load_balancer"
description "haproxy load balancer"
run_list("recipe[haproxy::app_lb]")
override_attributes(
  "haproxy" => {
    "app_server_role" => "webserver"
  }
)

The search uses the node's chef_environment. For example, create environments/production.rb, then upload it to the server with knife

% cat environments/production.rb
name "production"
description "Nodes in the production environment."
% knife environment from file production.rb

License and Author

• Author:: Joshua Timberman (joshua@opscode.com)
• Copyright:: 2009-2012, Opscode, Inc

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.