3 # xapi plugin script to update the cache of configuration items in the
4 # ovs-vswitchd configuration that are managed in the xapi database when
5 # integrated with Citrix management tools.
7 # Copyright (C) 2009, 2010, 2011 Nicira Networks, Inc.
9 # Licensed under the Apache License, Version 2.0 (the "License");
10 # you may not use this file except in compliance with the License.
11 # You may obtain a copy of the License at:
13 # http://www.apache.org/licenses/LICENSE-2.0
15 # Unless required by applicable law or agreed to in writing, software
16 # distributed under the License is distributed on an "AS IS" BASIS,
17 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 # See the License for the specific language governing permissions and
19 # limitations under the License.
21 # TBD: - error handling needs to be improved. Currently this can leave
22 # TBD: the system in a bad state if anything goes wrong.
30 vsctl="/usr/bin/ovs-vsctl"
31 cacert_filename="/etc/openvswitch/vswitchd.cacert"
33 # Delete the CA certificate, so that we go back to boot-strapping mode
36 os.remove(cacert_filename)
38 # Ignore error if file doesn't exist
41 def update(session, args):
42 # Refresh bridge network UUIDs in case this host joined or left a pool.
43 script = "/opt/xensource/libexec/interface-reconfigure"
45 retval = subprocess.call([script, "rewrite"])
47 syslog.syslog("%s exited with status %d" % (script, retval))
49 syslog.syslog("%s: failed to execute (%s)" % (script, e.strerror))
51 pools = session.xenapi.pool.get_all()
52 # We assume there is only ever one pool...
54 raise XenAPIPlugin.Failure("NO_POOL_FOR_HOST", [])
56 raise XenAPIPlugin.Failure("MORE_THAN_ONE_POOL_FOR_HOST", [])
57 pool = session.xenapi.pool.get_record(pools[0])
60 controller = pool["vswitch_controller"]
62 # On systems older than XenServer 5.6.0, we needed to store
63 # the key in "other_config".
64 controller = pool["other_config"]["vSwitchController"]
68 currentController = vswitchCurrentController()
69 if controller == "" and currentController != "":
72 emergency_reset(session, None)
76 ret_str += "Successfully removed controller config. "
77 elif controller != currentController:
80 emergency_reset(session, None)
83 setControllerCfg(controller)
84 ret_str += "Successfully set controller to %s. " % controller
87 pool_fail_mode = pool["other_config"]["vswitch-controller-fail-mode"]
93 for n in session.xenapi.network.get_all():
94 rec = session.xenapi.network.get_record(n)
96 bton[rec['bridge']] = rec
100 fail_mode_changed = False
101 for bridge in vswitchCfgQuery(['list-br']).split():
102 bridge = vswitchCfgQuery(['br-to-parent', bridge])
103 bridge_fail_mode = vswitchCfgQuery(["get", "Bridge",
104 bridge, "fail_mode"]).strip('[]"')
107 fail_mode = bton[bridge]["other_config"]["vswitch-controller-fail-mode"]
111 if fail_mode not in ['secure', 'standalone']:
112 fail_mode = pool_fail_mode
114 if fail_mode != 'secure':
115 fail_mode = 'standalone'
117 if bridge_fail_mode != fail_mode:
118 vswitchCfgMod(['--', 'set', 'Bridge', bridge,
119 "fail_mode=%s" % fail_mode])
120 fail_mode_changed = True
122 if fail_mode_changed:
123 ret_str += "Updated fail_mode. "
128 return "No change to configuration"
130 def vswitchCurrentController():
131 controller = vswitchCfgQuery(["get", "Open_vSwitch",
132 ".", "managers"]).strip('[]"')
135 if len(controller) < 4 or controller[0:4] != "ssl:":
138 return controller.split(':')[1]
140 def removeControllerCfg():
141 vswitchCfgMod(["--", "clear", "Open_vSwitch", ".", "managers",
144 def setControllerCfg(controller):
145 # /etc/xensource/xapi-ssl.pem is mentioned twice below because it
146 # contains both the private key and the certificate.
147 vswitchCfgMod(["--", "clear", "Open_vSwitch", ".", "managers",
149 "--", "--bootstrap", "set-ssl",
150 "/etc/xensource/xapi-ssl.pem",
151 "/etc/xensource/xapi-ssl.pem",
153 "--", "set", "Open_vSwitch", ".",
154 'managers="ssl:' + controller + ':6632"'])
156 def vswitchCfgQuery(action_args):
157 cmd = [vsctl, "--timeout=5", "-vANY:console:emer"] + action_args
158 output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()
159 if len(output) == 0 or output[0] == None:
162 output = output[0].strip()
165 def vswitchCfgMod(action_args):
166 cmd = [vsctl, "--timeout=5", "-vANY:console:emer"] + action_args
167 exitcode = subprocess.call(cmd)
169 raise XenAPIPlugin.Failure("VSWITCH_CONFIG_MOD_FAILURE",
170 [ str(exitcode) , str(action_args) ])
172 def emergency_reset(session, args):
173 cmd = [vsctl, "--timeout=5", "emer-reset"]
174 exitcode = subprocess.call(cmd)
176 raise XenAPIPlugin.Failure("VSWITCH_EMER_RESET_FAILURE",
179 return "Successfully reset configuration"
181 if __name__ == "__main__":
182 XenAPIPlugin.dispatch({"update": update,
183 "emergency_reset": emergency_reset})