srinivasmohan · December 17, 2012 21:08 · Dec 17, 2012
diff --git a/updhosts.rb b/updhosts.rb
@@ -0,0 +1,30 @@
+#Rebuild hosts file from knife node list,
+require 'erb'
+require 'json'
+require 'ohai' #to find my own IP
+
+def myaddress
+  thissys=Ohai::System.new
+	thissys.all_plugins
+	myip=thissys['cloud']['private_ips'][0]
+	return myip
+end
+
+#This is called in the template file by erb
+def findremoteip(name=nil)
+	return "#No such name" if name.nil?
+	svrname=name+'.somedomain.com'
+	nodes.search("name:#{svrname}") do |thisnode|
+		return "#{thisnode['cloud']['private_ips'][0]} #{name} #{svrname}" if thisnode['fqdn']==svrname	
+	end
+	return "# No nodes entry for "+svrname
+end
+
+template='/etc/hosts.erb'
+#These are used in the template.
+scriptname="#{$0} #{$1}"
+myip_ohai=myaddress
+abort "Could not find my IP?" if myip_ohai.nil?
+
+erb=ERB.new File.new(template).read,nil, '<>'
+puts erb.result(binding)