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 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"]
67 currentController = vswitchCurrentController()
68 if controller == "" and currentController != "":
71 emergency_reset(session, None)
75 return "Successfully removed controller config"
76 elif controller != currentController:
79 emergency_reset(session, None)
82 setControllerCfg(controller)
83 return "Successfully set controller to " + controller
85 return "No change to configuration"
87 def vswitchCurrentController():
88 controller = vswitchCfgQuery(["get", "Open_vSwitch",
89 ".", "managers"]).strip('[]"')
92 if len(controller) < 4 or controller[0:4] != "ssl:":
95 return controller.split(':')[1]
97 def removeControllerCfg():
98 vswitchCfgMod(["--", "clear", "Open_vSwitch", ".", "managers",
101 def setControllerCfg(controller):
102 # /etc/xensource/xapi-ssl.pem is mentioned twice below because it
103 # contains both the private key and the certificate.
104 vswitchCfgMod(["--", "clear", "Open_vSwitch", ".", "managers",
106 "--", "--bootstrap", "set-ssl",
107 "/etc/xensource/xapi-ssl.pem",
108 "/etc/xensource/xapi-ssl.pem",
110 "--", "set", "Open_vSwitch", ".",
111 'managers="ssl:' + controller + ':6632"'])
113 def vswitchCfgQuery(action_args):
114 cmd = [vsctl, "-vANY:console:emer"] + action_args
115 output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()
116 if len(output) == 0 or output[0] == None:
119 output = output[0].strip()
122 def vswitchCfgMod(action_args):
123 cmd = [vsctl, "-vANY:console:emer"] + action_args
124 exitcode = subprocess.call(cmd)
126 raise XenAPIPlugin.Failure("VSWITCH_CONFIG_MOD_FAILURE",
127 [ str(exitcode) , str(action_args) ])
129 def emergency_reset(session, args):
130 cmd = [vsctl, "emer-reset"]
131 exitcode = subprocess.call(cmd)
133 raise XenAPIPlugin.Failure("VSWITCH_EMER_RESET_FAILURE",
136 return "Successfully reset configuration"
138 if __name__ == "__main__":
139 XenAPIPlugin.dispatch({"update": update,
140 "emergency_reset": emergency_reset})