[PATCH] xenserver: Avoid errors from ovs-vsctl at system shutdown.

From ab32de001f10ddcb119360744c078ed9c1aebb06 Mon Sep 17 00:00:00 2001
Date: Fri, 25 Jun 2010 13:57:22 -0700
Commit 823c5699 "interface-reconfigure: callout to datapath backend class
method on rewrite" changed "interface-reconfigure rewrite" to update
bridge external-ids in the vswitch database.  But this had the side effect
of causing errors at system shutdown, since ovsdb-server gets shut down
before the rewrite action is called.  This commit fixes the problem by
skipping the update if the database socket does not exist.  (It's just
fine to skip the update, since the external-ids will be re-set the next
time the system boots anyhow.)

This commit fixed the problem on 5.6.810-34773p for me.  I don't see the
problem at all on 5.5.0.  Presumably system shutdown order has changed.

NIC-136.

CC: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Dominic Curran <dominic.curran@citrix.com>
---
 ...ensource_libexec_InterfaceReconfigureVswitch.py |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/scripts/InterfaceReconfigureVswitch.py b/scripts/InterfaceReconfigureVswitch.py
index 928db0d635dd6d8037bd6ee52e23d5a3049ecf36..6472a005aeb3517be3646eb83ddf3ca1500d36cd 100644 (file)
--- a/scripts/InterfaceReconfigureVswitch.py
+++ b/scripts/InterfaceReconfigureVswitch.py
@@ -12,6 +12,7 @@
 # GNU Lesser General Public License for more details.
 #
 from InterfaceReconfigure import *
+import os
 import re
 
 #
@@ -360,6 +361,13 @@ class DatapathVswitch(Datapath):
 
     @classmethod
     def rewrite(cls):
+        if not os.path.exists("/var/run/openvswitch/db.sock"):
+            # ovsdb-server is not running, so we can't update the database.
+            # Probably we are being called as part of system shutdown.  Just
+            # skip the update, since the external-ids will be updated on the
+            # next boot anyhow.
+            return
+
         vsctl_argv = []
         for pif in db().get_all_pifs():
             pifrec = db().get_pif_record(pif)