# HG changeset patch
# User Rob Hoes <rob.hoes@xxxxxxxxxx>
# Date 1281455715 -3600
# Node ID d15252d6d4137f7aaeffe61f537c336a5a4277e3
# Parent df2566c65c388924a9e096228ba5478e08c8fffe
Emergency Network Reset script
This patch creates the script xe-reset-networking, which is able to trigged a
network reset on the host it is executed on.
See the design page at
http://wiki.xensource.com/xenwiki/Emergency_Network_Reset for more information
and usage details.
Signed-off-by: Rob Hoes <rob.hoes@xxxxxxxxxx>
diff -r df2566c65c38 -r d15252d6d413 scripts/OMakefile
--- a/scripts/OMakefile
+++ b/scripts/OMakefile
@@ -49,6 +49,7 @@
$(IPROG) debug_ha_query_liveset $(DESTDIR)/opt/xensource/debug
$(IPROG) xe-scsi-dev-map $(DESTDIR)/opt/xensource/bin/
$(IPROG) xe-mount-iso-sr $(DESTDIR)/opt/xensource/bin/
+ $(IPROG) xe-reset-networking $(DIST)/staging/opt/xensource/bin/
$(IPROG) xe-set-iscsi-iqn $(DESTDIR)/opt/xensource/bin/
$(IPROG) xe-toolstack-restart $(DESTDIR)/opt/xensource/bin/
$(IPROG) xe-xentrace $(DESTDIR)/opt/xensource/bin/
diff -r df2566c65c38 -r d15252d6d413 scripts/xe-reset-networking
--- /dev/null
+++ b/scripts/xe-reset-networking
@@ -0,0 +1,180 @@
+#!/usr/bin/env python
+
+"""
+Copyright (C) 2006-2009 Citrix Systems Inc.
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; version 2.1 only. with the special
+exception on linking described in file LICENSE.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+"""
+
+import sys
+import os
+import commands
+import time
+from optparse import OptionParser
+#import XenAPI
+
+pool_conf = '/etc/xensource/pool.conf'
+interface_reconfigure = '/opt/xensource/libexec/interface-reconfigure'
+inventory_file = '/etc/xensource-inventory'
+network_reset = '/tmp/network-reset'
+
+# read inventory file
+def read_inventory():
+ f = open(inventory_file, 'r')
+ inventory = {}
+ for l in f.readlines():
+ kv = l.split('=')
+ inventory[kv[0]] = kv[1][1:-2]
+ return inventory
+
+def write_inventory(inventory):
+ f = open(inventory_file, 'w')
+ for k in inventory:
+ f.write(k + "='" + inventory[k] + "'\n")
+ f.close()
+
+def biosdevname(d):
+ try:
+ p = os.popen('biosdevname -i ' + d)
+ return p.read().strip()
+ except:
+ return d
+
+if __name__ == "__main__":
+ parser = OptionParser()
+ parser.add_option("-m", "--master", help="Master's address",
dest="address", default=None)
+ parser.add_option("--mac", help="MAC address of new management
interface", dest="mac", default=None)
+ parser.add_option("--mode", help='IP configuration mode for new
management interface: "dhcp" or "static" (default is dhcp)', dest="mode",
default="dhcp")
+ parser.add_option("--ip", help="IP address for new management
interface", dest="ip", default='')
+ parser.add_option("--netmask", help="Netmask for new management
interface", dest="netmask", default='')
+ parser.add_option("--gateway", help="Gateway for new management
interface", dest="gateway", default='')
+ parser.add_option("--dns", help="DNS server for new management
interface", dest="dns", default='')
+ (options, args) = parser.parse_args()
+
+ # Determine pool role
+ try:
+ f = open(pool_conf, 'r')
+ try:
+ l = f.readline()
+ ls = l.split(':')
+ if ls[0] == 'master':
+ master = True
+ address = 'localhost'
+ else:
+ master = False
+ address = ls[1]
+ finally:
+ f.close()
+ except:
+ pass
+
+ # Check if a MAC is given
+ if options.mac == None:
+ parser.error("please specify the MAC address of the management
interface")
+ sys.exit(1)
+ else:
+ mac = options.mac.lower()
+
+ # Determine IP configuration for management interface
+ options.mode = options.mode.lower()
+ if options.mode not in ["dhcp", "static"]:
+ parser.error('mode should be either "dhcp" or "static"')
+ sys.exit(1)
+
+ if options.mode == 'static' and (options.ip == '' or options.netmask ==
''):
+ parser.error("if static IP mode is selected, an IP address and
netmask need to be specified")
+ sys.exit(1)
+
+ # Warn user
+ res = raw_input("This command will reboot the host and reset its
network configuration.\nAny running VMs should first be shut down.\nType 'yes'
to continue.\n")
+ if res <> 'yes':
+ sys.exit(1)
+
+ # Update master's IP, if needed and given
+ if master == True and options.address != None:
+ address = options.address
+ print "Setting master's ip (" + address + ")..."
+ try:
+ f = open(pool_conf, 'w')
+ f.write('slave:' + address)
+ finally:
+ f.close()
+
+ # Stop networking subsystem to ensure bonds etc are down
+ os.system('service network stop')
+
+ # Find existing network interfaces (MAC and device name)
+ sysfs = '/sys/class/net/'
+ device = None
+ # iterate over all devices
+ for d in os.listdir(sysfs):
+ # only continue if it is a physical device
+ if os.access(sysfs + d + '/device', os.F_OK):
+ # try to get the MAC
+ m = None
+ try:
+ f = open(sysfs + d + '/address', 'r')
+ m = f.readline()[:-1].lower()
+ finally:
+ f.close()
+ if m == mac:
+ device = biosdevname(d)
+ break
+
+ # Find current device name for management interface
+ if device == None:
+ print "Could not find MAC", mac
+ print "Aborting."
+ sys.exit(1)
+
+ # Construct bridge name for management interface based on convention
+ if device[:3] == 'eth':
+ bridge = 'xenbr' + device[3:]
+ else:
+ bridge = 'br' + device
+
+ # Ensure xapi is not running
+ print "Stopping xapi..."
+ os.system('service xapi stop >/dev/null 2>/dev/null')
+
+ # Reconfigure new management interface
+ print "Reconfiguring " + device + "..."
+ if_args = ' --force ' + bridge + ' rewrite --mac=' + mac + ' --device='
+ device + ' --mode=' + options.mode
+ if options.mode == 'static':
+ if_args += ' --ip=' + options.ip + ' --netmask=' +
options.netmask
+ if options.gateway != '':
+ if_args += ' --gateway=' + options.gateway
+ os.system(interface_reconfigure + if_args + ' >/dev/null 2>/dev/null')
+
+ # Update interfaces in inventory file
+ print 'Updating inventory file...'
+ inventory = read_inventory()
+ inventory['MANAGEMENT_INTERFACE'] = bridge
+ inventory['CURRENT_INTERFACES'] = ''
+ write_inventory(inventory)
+
+ # Write trigger file for XAPI to continue the network reset on startup
+ try:
+ f = file(network_reset, 'w')
+ f.write('MAC=' + mac + '\n')
+ f.write('MODE=' + options.mode + '\n')
+ if options.mode == 'static':
+ f.write('IP=' + options.ip + '\n')
+ f.write('NETMASK=' + options.netmask + '\n')
+ if options.gateway != '':
+ f.write('GATEWAY=' + gateway + '\n')
+ if options.dns != '':
+ f.write('DNS=' + dns + '\n')
+ finally:
+ f.close()
+
+ # Reboot
+ os.system("/sbin/reboot")
+
scripts/OMakefile | 1 +
scripts/xe-reset-networking | 180 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 181 insertions(+), 0 deletions(-)
xen-api.hg-2.patch
Description: Text Data
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