worlddump: include Open vSwitch info

This may be useful when debugging neutron gate failures.

Change-Id: Iea3589456d2b05d233ba88523a5bd4ac114a0c86

Author: Ihar Hrachyshka

tools/worlddump.py

@@ -110,6 +110,20 @@ def network_dump():
     _dump_cmd("ip route")
 
 
+def ovs_dump():
+    _header("Open vSwitch Dump")
+
+    # NOTE(ihrachys): worlddump is used outside of devstack context (f.e. in
+    # grenade), so there is no single place to determine the bridge names from.
+    # Hardcode for now.
+    bridges = ('br-int', 'br-tun', 'br-ex')
+    _dump_cmd("sudo ovs-vsctl show")
+    for bridge in bridges:
+        _dump_cmd("sudo ovs-ofctl show %s" % bridge)
+    for bridge in bridges:
+        _dump_cmd("sudo ovs-ofctl dump-flows %s" % bridge)
+
+
 def process_list():
     _header("Process Listing")
     _dump_cmd("ps axo "
@@ -147,6 +161,7 @@ def main():
         disk_space()
         process_list()
         network_dump()
+        ovs_dump()
         iptables_dump()
         ebtables_dump()
         compute_consoles()