# Copyright 2017 Red Hat, Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import subprocess
import distro
from oslo_config import cfg
from oslo_log import log as logging
import webob
from werkzeug import exceptions
from octavia.amphorae.backends.utils import interface_file
from octavia.common import constants as consts
from octavia.common import exceptions as octavia_exceptions
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
[docs]class BaseOS(object):
def __init__(self, os_name):
self.os_name = os_name
self.package_name_map = {}
@classmethod
def _get_subclasses(cls):
for subclass in cls.__subclasses__():
for sc in subclass._get_subclasses():
yield sc
yield subclass
[docs] @classmethod
def get_os_util(cls):
os_name = distro.id()
for subclass in cls._get_subclasses():
if subclass.is_os_name(os_name):
return subclass(os_name)
raise octavia_exceptions.InvalidAmphoraOperatingSystem(os_name=os_name)
def _map_package_name(self, package_name):
return self.package_name_map.get(package_name, package_name)
[docs] def write_interface_file(self, interface, ip_address, prefixlen):
interface = interface_file.InterfaceFile(
name=interface,
if_type=consts.LO,
addresses=[{
"address": ip_address,
"prefixlen": prefixlen
}]
)
interface.write()
[docs] def write_vip_interface_file(self, interface, vip, ip_version,
prefixlen, gateway,
mtu, vrrp_ip,
host_routes, fixed_ips=None):
vip_interface = interface_file.VIPInterfaceFile(
name=interface,
mtu=mtu,
vip=vip,
ip_version=ip_version,
prefixlen=prefixlen,
gateway=gateway,
vrrp_ip=vrrp_ip,
host_routes=host_routes,
fixed_ips=fixed_ips,
topology=CONF.controller_worker.loadbalancer_topology)
vip_interface.write()
[docs] def write_port_interface_file(self, interface, fixed_ips, mtu):
port_interface = interface_file.PortInterfaceFile(
name=interface,
mtu=mtu,
fixed_ips=fixed_ips)
port_interface.write()
[docs] @classmethod
def bring_interface_up(cls, interface, name):
cmd = ("ip netns exec {ns} amphora-interface up {params}".format(
ns=consts.AMPHORA_NAMESPACE, params=interface))
LOG.debug("Executing: %s", cmd)
try:
out = subprocess.check_output(cmd.split(),
stderr=subprocess.STDOUT)
for line in out.decode('utf-8').split('\n'):
LOG.debug(line)
except subprocess.CalledProcessError as e:
LOG.error('Failed to set up %s due to error: %s %s', interface,
e, e.output)
raise exceptions.HTTPException(
response=webob.Response(json=dict(
message='Error plugging {0}'.format(name),
details=e.output), status=500))
[docs]class Ubuntu(BaseOS):
[docs] @classmethod
def is_os_name(cls, os_name):
return os_name in ['ubuntu']
[docs] def cmd_get_version_of_installed_package(self, package_name):
name = self._map_package_name(package_name)
return "dpkg-query -W -f=${{Version}} {name}".format(name=name)
[docs]class RH(BaseOS):
[docs] @classmethod
def is_os_name(cls, os_name):
return os_name in ['fedora', 'rhel']
[docs] def cmd_get_version_of_installed_package(self, package_name):
name = self._map_package_name(package_name)
return "rpm -q --queryformat %{{VERSION}} {name}".format(name=name)
[docs]class CentOS(RH):
def __init__(self, os_name):
super().__init__(os_name)
if distro.version() == '7':
self.package_name_map.update({'haproxy': 'haproxy18'})
[docs] @classmethod
def is_os_name(cls, os_name):
return os_name in ['centos']
