Write hostname-related configs for new ejabberd cluster

site-cookbooks/kosmos-ejabberd/metadata.rb

@@ -26,3 +26,4 @@ depends "kosmos_postgresql"
 depends "backup"
 depends "firewall"
 depends "tor-full"
+depends "hostsfile"

site-cookbooks/kosmos-ejabberd/recipes/default.rb

@@ -29,15 +29,25 @@ file "/opt/ejabberd/.erlang.cookie" do
   content ejabberd_credentials['erlang_cookie']
 end
 
+ejabberd_nodes = search(:node, "role:ejabberd")
+
+ejabberd_nodes.each do |n|
+  ip_address = n["knife_zero"]["host"]
+  IPAddr.new ip_address
+  hostsfile_entry ip_address do
+    hostname n["hostname"]
+    action :create
+  end
+rescue IPAddr::InvalidAddressError
+  next
+end
+
+ejabberd_hostnames = ejabberd_nodes.map { |n| n["hostname"] }
 file "/opt/ejabberd/.hosts.erlang" do
   mode "0644"
   owner "ejabberd"
   group "ejabberd"
-  content <<-EOF
-"andromeda.kosmos.org".
-"centaurus.kosmos.org".
-"draco.kosmos.org".
-  EOF
+  content ejabberd_hostnames.map{|h| "#{h}."}.join("\n")
 end
 
 ruby_block "configure ERLANG_NODE" do
@@ -45,7 +55,7 @@ ruby_block "configure ERLANG_NODE" do
     file = Chef::Util::FileEdit.new("/opt/ejabberd/conf/ejabberdctl.cfg")
     file.search_file_replace_line(
       %r{#ERLANG_NODE=ejabberd@localhost},
-      "ERLANG_NODE=#{node['kosmos-ejabberd']['erlang_node']}"
+      "ERLANG_NODE=ejabberd@#{node['name']}"
     )
     file.write_file
   end