xenserver: Allow NULL pool in configuration cache.

InterfaceReconfigure assumes the pool is in the configuration
cache.  This is always true except when upgrading from an older
version of openvswitch which does record the pool.  This can cause
upgrades to lock up.

Signed-off-by: Ethan Jackson <ethan@nicira.com>

diff --git a/xenserver/opt_xensource_libexec_InterfaceReconfigure.py b/xenserver/opt_xensource_libexec_InterfaceReconfigure.py
index 6cf19ee..3030e0f 100644 (file)
--- a/xenserver/opt_xensource_libexec_InterfaceReconfigure.py
+++ b/xenserver/opt_xensource_libexec_InterfaceReconfigure.py
@@ -659,7 +659,8 @@ class DatabaseCache(object):
             return None
 
     def get_pool_record(self):
-        return self.__pools.values()[0]
+        if len(self.__pools) > 0:
+            return self.__pools.values()[0]
 
 #
 #

diff --git a/xenserver/opt_xensource_libexec_InterfaceReconfigureVswitch.py b/xenserver/opt_xensource_libexec_InterfaceReconfigureVswitch.py
index 8429358..a3d4bd2 100644 (file)
--- a/xenserver/opt_xensource_libexec_InterfaceReconfigureVswitch.py
+++ b/xenserver/opt_xensource_libexec_InterfaceReconfigureVswitch.py
@@ -332,7 +332,11 @@ def configure_datapath(pif):
                    'other-config:hwaddr=%s' % vsctl_escape(db().get_pif_record(pif)['MAC'])]
 
     pool = db().get_pool_record()
-    fail_mode = pool['other_config']['vswitch-controller-fail-mode']
+
+    if pool:
+        fail_mode = pool['other_config']['vswitch-controller-fail-mode']
+    else:
+        fail_mode = 'standalone'
 
     if fail_mode in ['standalone', 'secure']:
         vsctl_argv += ['--', 'set', 'Bridge', bridge, 'fail_mode=%s' % fail_mode]