def plug(self, network_id, port_id, device_name, mac_address,
bridge=None, namespace=None, prefix=None):
"""This method is called by the Dhcp agent or by the L3 agent
when a new network is created
"""
if not ip_lib.device_exists(device_name,
self.root_helper,
namespace=namespace):
ip = ip_lib.IPWrapper(self.root_helper)
tap_name = device_name.replace(prefix or 'tap', 'tap')
# Create ns_dev in a namespace if one is configured.
root_dev, ns_dev = ip.add_veth(tap_name, device_name,
namespace2=namespace)
ns_dev.link.set_address(mac_address)
# Add an interface created by ovs to the namespace.
namespace_obj = ip.ensure_namespace(namespace)
namespace_obj.add_device_to_namespace(ns_dev)
ns_dev.link.set_up()
root_dev.link.set_up()
cmd = ['mm-ctl', '--bind-port', port_id, device_name]
utils.execute(cmd, self.root_helper)
else:
LOG.info(_("Device %s already exists"), device_name)
def disable(self):
pid = self.pid
if self.active:
cmd = ['kill', '-9', pid]
utils.execute(cmd, self.root_helper)
elif pid:
LOG.debug(_('Process for %(uuid)s pid %(pid)d is stale, ignoring '
'command'), {'uuid': self.uuid, 'pid': pid})
else:
LOG.debug(_('No process started for %s'), self.uuid)
def kill_pids_in_file(root_helper, pid_path):
if os.path.exists(pid_path):
with open(pid_path, 'r') as pids:
for pid in pids:
pid = pid.strip()
try:
utils.execute(['kill', '-9', pid], root_helper)
except RuntimeError:
LOG.exception(
_('Unable to kill haproxy process: %s'),
pid
)
def _ovs_add_port(self, bridge, device_name, port_id, mac_address,
internal=True):
cmd = ['ovs-vsctl', '--', '--if-exists', 'del-port', device_name, '--',
'add-port', bridge, device_name]
if internal:
cmd += ['--', 'set', 'Interface', device_name, 'type=internal']
cmd += ['--', 'set', 'Interface', device_name,
'external-ids:iface-id=%s' % port_id,
'--', 'set', 'Interface', device_name,
'external-ids:iface-status=active',
'--', 'set', 'Interface', device_name,
'external-ids:attached-mac=%s' % mac_address]
utils.execute(cmd, self.root_helper)
def _kill_process(self, pid):
try:
# A process started by a root helper will be running as
# root and need to be killed via the same helper.
utils.execute(['kill', '-9', pid], root_helper=self.root_helper)
except Exception as ex:
stale_pid = (isinstance(ex, RuntimeError) and
'No such process' in str(ex))
if not stale_pid:
LOG.exception(_('An error occurred while killing [%s].'),
self.cmd)
return False
return True
def unplug(self, device_name, bridge=None, namespace=None, prefix=None):
"""Unplug the interface."""
tap_name = self._get_tap_name(device_name, prefix)
try:
cmd = ['ivs-ctl', 'del-port', tap_name]
utils.execute(cmd, self.root_helper)
device = ip_lib.IPDevice(device_name,
self.root_helper,
namespace)
device.link.delete()
LOG.debug(_("Unplugged interface '%s'"), device_name)
except RuntimeError:
LOG.error(_("Failed unplugging interface '%s'"),
device_name)
def get_bridge_for_iface(root_helper, iface):
args = ["ovs-vsctl", "--timeout=%d" % cfg.CONF.ovs_vsctl_timeout,
"iface-to-br", iface]
try:
return utils.execute(args, root_helper=root_helper).strip()
except Exception:
LOG.exception(_("Interface %s not found."), iface)
return None
def get_bridge_external_bridge_id(root_helper, bridge):
args = ["ovs-vsctl", "--timeout=2", "br-get-external-id",
bridge, "bridge-id"]
try:
return utils.execute(args, root_helper=root_helper).strip()
except Exception:
LOG.exception(_("Bridge %s not found."), bridge)
return None
def run_ofctl(self, cmd, args, process_input=None):
full_args = ["ovs-ofctl", cmd, self.br_name] + args
try:
return utils.execute(full_args, root_helper=self.root_helper,
process_input=process_input)
except Exception as e:
LOG.error(_("Unable to execute %(cmd)s. Exception: %(exception)s"),
{'cmd': full_args, 'exception': e})
def get_bridges(root_helper):
args = ["ovs-vsctl", "--timeout=%d" % cfg.CONF.ovs_vsctl_timeout,
"list-br"]
try:
return utils.execute(args, root_helper=root_helper).strip().split("\n")
except Exception as e:
with excutils.save_and_reraise_exception():
LOG.exception(_("Unable to retrieve bridges. Exception: %s"), e)
def get_installed_ovs_usr_version(root_helper):
args = ["ovs-vsctl", "--version"]
try:
cmd = utils.execute(args, root_helper=root_helper)
ver = re.findall("\d+\.\d+", cmd)[0]
return ver
except Exception:
LOG.exception(_("Unable to retrieve OVS userspace version."))
def _execute(cls, options, command, args, root_helper=None,
namespace=None):
opt_list = ['-%s' % o for o in options]
if namespace:
ip_cmd = ['ip', 'netns', 'exec', namespace, 'ip']
else:
ip_cmd = ['ip']
return utils.execute(ip_cmd + opt_list + [command] + list(args),
root_helper=root_helper)
def get_installed_kernel_version():
args = ["uname", "-r"]
try:
cmd = utils.execute(args)
for line in cmd.split('\n'):
ver = re.findall("\d+\.\d+\.\d+", line)
return ver[0]
except Exception:
LOG.exception(_("Unable to retrieve installed Linux kernel version."))
def get_xapi_iface_id(self, xs_vif_uuid):
args = ["xe", "vif-param-get", "param-name=other-config",
"param-key=nicira-iface-id", "uuid=%s" % xs_vif_uuid]
try:
return utils.execute(args, root_helper=self.root_helper).strip()
except Exception as e:
with excutils.save_and_reraise_exception():
LOG.error(_("Unable to execute %(cmd)s. "
"Exception: %(exception)s"),
{'cmd': args, 'exception': e})
def get_installed_ovs_klm_version():
args = ["modinfo", "openvswitch"]
try:
cmd = utils.execute(args)
for line in cmd.split('\n'):
if 'version: ' in line and not 'srcversion' in line:
ver = re.findall("\d+\.\d+", line)
return ver[0]
except Exception:
LOG.exception(_("Unable to retrieve OVS kernel module version."))
def run_vsctl(self, args, check_error=False):
full_args = ["ovs-vsctl", "--timeout=%d" % self.vsctl_timeout] + args
try:
return utils.execute(full_args, root_helper=self.root_helper)
except Exception as e:
with excutils.save_and_reraise_exception() as ctxt:
LOG.error(_("Unable to execute %(cmd)s. "
"Exception: %(exception)s"),
{'cmd': full_args, 'exception': e})
if not check_error:
ctxt.reraise = False
def execute(self, cmds, addl_env={}, check_exit_code=True):
if not self._parent.root_helper:
raise exceptions.SudoRequired()
ns_params = []
if self._parent.namespace:
ns_params = ['ip', 'netns', 'exec', self._parent.namespace]
env_params = []
if addl_env:
env_params = (['env'] +
['%s=%s' % pair for pair in addl_env.items()])
return utils.execute(
ns_params + env_params + list(cmds),
root_helper=self._parent.root_helper,
check_exit_code=check_exit_code)
def _ivs_add_port(self, device_name, port_id, mac_address):
cmd = ['ivs-ctl', 'add-port', device_name]
utils.execute(cmd, self.root_helper)
def iproute_arg_supported(command, arg, root_helper=None):
command += ['help']
stdout, stderr = utils.execute(command, root_helper=root_helper,
check_exit_code=False, return_stderr=True)
return any(arg in line for line in stderr.split('\n'))
