summaryrefslogtreecommitdiff
path: root/provider_base/lib/macros/haproxy.rb
diff options
context:
space:
mode:
Diffstat (limited to 'provider_base/lib/macros/haproxy.rb')
-rw-r--r--provider_base/lib/macros/haproxy.rb73
1 files changed, 73 insertions, 0 deletions
diff --git a/provider_base/lib/macros/haproxy.rb b/provider_base/lib/macros/haproxy.rb
new file mode 100644
index 00000000..602ae726
--- /dev/null
+++ b/provider_base/lib/macros/haproxy.rb
@@ -0,0 +1,73 @@
+# 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|
+ # make sure we have a port to talk to
+ unless accept_ports[node.name]
+ error "haproxy needs a local port to talk to when connecting to #{node.name}"
+ end
+ weight = default_weight
+ try {
+ weight = local_weight if self.location.name == node.location.name
+ }
+ hsh[node.name] = Config::Object[
+ 'backup', false,
+ 'host', 'localhost',
+ 'port', accept_ports[node.name],
+ 'weight', weight
+ ]
+ if node.services.include?('couchdb')
+ hsh[node.name]['writable'] = node.couch.mode != 'mirror'
+ end
+ 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