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 fail_mode = pool["other_config"]["vswitch-controller-fail-mode"]
91 if fail_mode != 'secure':
92 fail_mode = 'standalone'
94 fail_mode_changed = False
95 for (p, rec) in session.xenapi.PIF.get_all_records().items():
97 network = session.xenapi.network.get_record(rec['network'])
98 bridge = network['bridge']
100 syslog.syslog("%s: failed to get bridge name (%s)" %
104 bridge_fail_mode = vswitchCfgQuery(["get", "Bridge",
105 bridge, "fail_mode"]).strip('[]"')
107 if bridge_fail_mode != fail_mode:
108 vswitchCfgMod(['--', 'set', 'Bridge', bridge,
109 "fail_mode=%s" % fail_mode])
110 fail_mode_changed = True
112 if fail_mode_changed:
113 ret_str += "Set fail_mode to %s. " % fail_mode
118 return "No change to configuration"
120 def vswitchCurrentController():
121 controller = vswitchCfgQuery(["get", "Open_vSwitch",
122 ".", "managers"]).strip('[]"')
125 if len(controller) < 4 or controller[0:4] != "ssl:":
128 return controller.split(':')[1]
130 def removeControllerCfg():
131 vswitchCfgMod(["--", "clear", "Open_vSwitch", ".", "managers",
134 def setControllerCfg(controller):
135 # /etc/xensource/xapi-ssl.pem is mentioned twice below because it
136 # contains both the private key and the certificate.
137 vswitchCfgMod(["--", "clear", "Open_vSwitch", ".", "managers",
139 "--", "--bootstrap", "set-ssl",
140 "/etc/xensource/xapi-ssl.pem",
141 "/etc/xensource/xapi-ssl.pem",
143 "--", "set", "Open_vSwitch", ".",
144 'managers="ssl:' + controller + ':6632"'])
146 def vswitchCfgQuery(action_args):
147 cmd = [vsctl, "--timeout=5", "-vANY:console:emer"] + action_args
148 output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()
149 if len(output) == 0 or output[0] == None:
152 output = output[0].strip()
155 def vswitchCfgMod(action_args):
156 cmd = [vsctl, "--timeout=5", "-vANY:console:emer"] + action_args
157 exitcode = subprocess.call(cmd)
159 raise XenAPIPlugin.Failure("VSWITCH_CONFIG_MOD_FAILURE",
160 [ str(exitcode) , str(action_args) ])
162 def emergency_reset(session, args):
163 cmd = [vsctl, "--timeout=5", "emer-reset"]
164 exitcode = subprocess.call(cmd)
166 raise XenAPIPlugin.Failure("VSWITCH_EMER_RESET_FAILURE",
169 return "Successfully reset configuration"
171 if __name__ == "__main__":
172 XenAPIPlugin.dispatch({"update": update,
173 "emergency_reset": emergency_reset})