[Kimchi-devel] [PATCH][Kimchi] Avoid break Wok when register events, if Libvirt is down

[Rodrigo Trujillo]

When Wok starts up it loads Kimcho model, which tries to register
Libvirt events. A problem happens if Libvirt service is down when Wok
starts (usually manually/command line start up), because the connection
is None, raising an error that breaks Wok.
This patch fixes this problem and return a proper log message.

Signed-off-by: Rodrigo Trujillo <rodrigo.trujillo at linux.vnet.ibm.com>
---
 model/libvirtevents.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/model/libvirtevents.py b/model/libvirtevents.py
index 632d399..cb06cf0 100644
--- a/model/libvirtevents.py
+++ b/model/libvirtevents.py
@@ -76,8 +76,13 @@ class LibvirtEvents(object):
         """
         Register Libvirt IO_ERROR_REASON event to handle host ENOSPC
         """
+        libv_conn = conn.get()
+        if libv_conn is None:
+            wok_log.error("Register of ENOSPC event failed because Libvirt "
+                          "service seems to be not running")
+            return
         try:
-            conn.get().domainEventRegisterAny(
+            libv_conn.domainEventRegisterAny(
                 None,
                 libvirt.VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON,
                 self.event_enospc_cb,
-- 
2.1.0