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-rw-r--r--provider_base/lib/macros/haproxy.rb68
1 files changed, 68 insertions, 0 deletions
diff --git a/provider_base/lib/macros/haproxy.rb b/provider_base/lib/macros/haproxy.rb
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+++ b/provider_base/lib/macros/haproxy.rb
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+# encoding: utf-8
+
+##
+## HAPROXY
+##
+
+module LeapCli
+ module Macro
+
+ #
+ # creates a hash suitable for configuring haproxy. the key is the node name of the server we are proxying to.
+ #
+ # * node_list - a hash of nodes for the haproxy servers
+ # * stunnel_client - contains the mappings to local ports for each server node.
+ # * non_stunnel_port - in case self is included in node_list, the port to connect to.
+ #
+ # 1000 weight is used for nodes in the same location.
+ # 100 otherwise.
+ #
+ def haproxy_servers(node_list, stunnel_clients, non_stunnel_port=nil)
+ default_weight = 10
+ local_weight = 100
+
+ # record the hosts_file
+ hostnames(node_list)
+
+ # create a simple map for node name -> local stunnel accept port
+ accept_ports = stunnel_clients.inject({}) do |hsh, stunnel_entry|
+ name = stunnel_entry.first.sub /_[0-9]+$/, ''
+ hsh[name] = stunnel_entry.last['accept_port']
+ hsh
+ end
+
+ # if one the nodes in the node list is ourself, then there will not be a stunnel to it,
+ # but we need to include it anyway in the haproxy config.
+ if node_list[self.name] && non_stunnel_port
+ accept_ports[self.name] = non_stunnel_port
+ end
+
+ # create the first pass of the servers hash
+ servers = node_list.values.inject(Config::ObjectList.new) do |hsh, node|
+ weight = default_weight
+ if self['location'] && node['location']
+ if self.location['name'] == node.location['name']
+ weight = local_weight
+ end
+ end
+ hsh[node.name] = Config::Object[
+ 'backup', false,
+ 'host', 'localhost',
+ 'port', accept_ports[node.name] || 0,
+ 'weight', weight
+ ]
+ hsh
+ end
+
+ # if there are some local servers, make the others backup
+ if servers.detect{|k,v| v.weight == local_weight}
+ servers.each do |k,server|
+ server['backup'] = server['weight'] == default_weight
+ end
+ end
+
+ return servers
+ end
+
+ end
+end \ No newline at end of file