use certificates role instead of letsencrypt role

filter_plugins/filters.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+class FilterModule(object):
+	def filters(self):
+		return {
+				'nginx_vhosts_to_certificates': self.nginx_vhosts_to_certificates
+			}
+
+	def nginx_vhosts_to_certificates(self, vhosts):
+		certs = {}
+		for i in vhosts.keys():
+			if not vhosts[i]['letsencrypt']:
+				continue
+			certs['nginx_'+i] = {
+					'backend': 'letsencrypt',
+					'san': vhosts[i]['servername']
+				}
+		return certs