Pass base64-encoded CA certificate to cloud-init script

Change-Id: I90d7ad55b446888eb15de2d1d37e6ca50a31a621

muranoconductor/cloud_formation.py

@@ -110,6 +110,10 @@ def prepare_user_data(context, hostname, service, unit,
                 '%MURANO_SERVER_ADDRESS%',
                 config.CONF.file_server or settings.host)
 
+            init_script = init_script.replace(
+                '%CA_ROOT_CERT_BASE64%',
+                get_ca_certificate())
+
             return init_script
 
 
@@ -119,6 +123,14 @@ def set_config_params(template_data, replacements):
     return template_data
 
 
+def get_ca_certificate():
+    ca_file = (config.CONF.rabbitmq.ca_file or '').strip()
+    if not ca_file:
+        return ''
+    with open(ca_file) as stream:
+        return stream.read().encode('base64')
+
+
 counters = {}