[Xend] Do network startup earlier.

Xend tries to rebuild the network configuration such as bridges and
vlan interfaces  (in those bridges) when starting. Unfortunately this
fails on the first startup since the network script has not run, yet,
and for example created peth0. When restarting xend it works due to
the peth0 being there then. This patch moves the initialization of the
network to an earlier time in the xend initialization process to
mitigate this problem.

Signed-off-by: Stefan Berger <stefanb@us.ibm.com>

tools/python/xen/xend/XendPIF.py

@@ -24,6 +24,7 @@ from xen.xend import XendAPIStore
 from xen.xend.XendBase import XendBase
 from xen.xend.XendPIFMetrics import XendPIFMetrics
 from xen.xend.XendError import *
+from xen.xend import Vifctl
 
 log = logging.getLogger("xend.XendPIF")
 log.setLevel(logging.TRACE)
@@ -31,6 +32,9 @@ log.setLevel(logging.TRACE)
 MAC_RE = re.compile(':'.join(['[0-9a-f]{2}'] * 6))
 IP_IFACE_RE = re.compile(r'^\d+: (\w+):.*mtu (\d+) .* link/\w+ ([0-9a-f:]+)')
 
+
+Vifctl.network('start')
+
 def linux_phy_to_virt(pif_name):
     return 'eth' + re.sub(r'^[a-z]+', '', pif_name)
 

tools/python/xen/xend/server/SrvServer.py

@@ -49,7 +49,6 @@ from threading import Thread
 from xen.web.httpserver import HttpServer, UnixHttpServer
 
 from xen.xend import XendNode, XendOptions, XendAPI
-from xen.xend import Vifctl
 from xen.xend.XendLogging import log
 from xen.xend.XendClient import XEN_API_SOCKET
 from xen.xend.XendDomain import instance as xenddomain
@@ -101,8 +100,6 @@ class XendServers:
         if status:
             fcntl.fcntl(status, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
         
-        Vifctl.network('start')
-
         # Prepare to catch SIGTERM (received when 'xend stop' is executed)
         # and call each server's cleanup if possible
         signal.signal(signal.SIGTERM, self.cleanup)