software/slapos-master: copy haproxy.cfg.in

This profile will change in stack/erp5 and in erp5 haproxy will also play the
role of apache, but in slapos-master we will keep both apache and haproxy for
a while.

software/slapos-master/buildout.hash.cfg

@@ -23,3 +23,7 @@ md5sum = 4998e62351f54700ee23a2ca8cd89329
 [template-apache-backend-conf]
 filename = apache-backend.conf.in
 md5sum = 9d7104ce18f79a7a84988efc11f5ed23
+
+[template-haproxy-cfg]
+filename = haproxy.cfg.in
+md5sum = fec6a312e4ef84b02837742992aaf495

software/slapos-master/haproxy.cfg.in

+{% set server_check_path = parameter_dict['server-check-path'] -%}
+global
+  maxconn 4096
+  stats socket {{ parameter_dict['socket-path'] }} level admin
+
+defaults
+  mode http
+  retries 1
+  option redispatch
+  maxconn 2000
+  cookie SERVERID rewrite
+  balance roundrobin
+  stats uri /haproxy
+  stats realm Global\ statistics
+  # it is useless to have timeout much bigger than the one of apache.
+  # By default apache use 300s, so we set slightly more in order to
+  # make sure that apache will first stop the connection.
+  timeout server 305s
+  # Stop waiting in queue for a zope to become available.
+  # If no zope can be reached after one minute, consider the request will
+  # never succeed.
+  timeout queue 60s
+  # The connection should be immediate on LAN,
+  # so we should not set more than 5 seconds, and it could be already too much
+  timeout connect 5s
+  # As requested in haproxy doc, make this "at least equal to timeout server".
+  timeout client 305s
+  # Use "option httpclose" to not preserve client & server persistent connections
+  # while handling every incoming request individually, dispatching them one after
+  # another to servers, in HTTP close mode. This is really needed when haproxy
+  # is configured with maxconn to 1, without this option browsers are unable
+  # to render a page
+  option httpclose
+
+{% for name, (port, backend_list) in sorted(parameter_dict['backend-dict'].iteritems()) -%}
+listen {{ name }}
+  bind {{ parameter_dict['ip'] }}:{{ port }}
+  http-request set-header X-Balancer-Current-Cookie SERVERID
+{%   set has_webdav = [] -%}
+{%   for address, connection_count, webdav in backend_list -%}
+{%     if webdav %}{% do has_webdav.append(None) %}{% endif -%}
+{%     set server_name = name ~ '-' ~ loop.index0 -%}
+  server {{ server_name }} {{ address }} cookie {{ server_name }} check inter 3s rise 1 fall 2 maxqueue 5 maxconn {{ connection_count }}
+{%   endfor -%}
+{%-  if not has_webdav and server_check_path %}
+  option httpchk GET {{ server_check_path }}
+{%   endif -%}
+{% endfor %}

software/slapos-master/software.cfg

@@ -63,7 +63,9 @@ filename = instance-balancer.cfg.in
 
 [template-apache-backend-conf]
 url = ${:_profile_base_location_}/${:filename}
-filename = apache-backend.conf.in 
+
+[template-haproxy-cfg]
+url = ${:_profile_base_location_}/${:filename}
 
 [versions]
 python-memcached = 1.47