Storwize SVC driver hostname can't start with number

Storwize family storage does not allow host identifier start with
a numeric number. Otherwise cinder initialize_connection() API will
throw exception due to such invalid host name in the connector. The fix
is to add a '_' symbol as prefix if the host identifier in connector
starts with non-alphabet letters.

Closes-Bug: #1233952
Change-Id: Ia88afc373e2635c10c3f6256331a4fd90f51f4b8

diff --git a/cinder/volume/drivers/storwize_svc.py b/cinder/volume/drivers/storwize_svc.py
index ef6cb3d417f1461cbc7b085122b38b1093ad0478..16a458b83ce8e0ed4365d093ad25d481007ca2ca 100644 (file)
--- a/cinder/volume/drivers/storwize_svc.py
+++ b/cinder/volume/drivers/storwize_svc.py
@@ -482,6 +482,11 @@ class StorwizeSVCDriver(san.SanDriver):
             raise exception.NoValidHost(reason=msg)
 
         host_name = str(host_name)
+
+        # Storwize family doesn't like hostname that starts with number.
+        if not re.match('^[A-Za-z]', host_name):
+            host_name = '_' + host_name
+
         return host_name[:55]
 
     def _find_host_from_wwpn(self, connector):