Source code for octavia.amphorae.backends.agent.api_server.osutils

# 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: def __init__(self, os_name): self.os_name = os_name self.package_name_map = {} @classmethod def _get_subclasses(cls): for subclass in cls.__subclasses__(): yield from subclass._get_subclasses() 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, vips, mtu, vrrp_info, fixed_ips=None, is_sriov=False): vip_interface = interface_file.VIPInterfaceFile( name=interface, mtu=mtu, vips=vips, vrrp_info=vrrp_info, fixed_ips=fixed_ips, topology=CONF.controller_worker.loadbalancer_topology, is_sriov=is_sriov) vip_interface.write()
[docs] def write_port_interface_file(self, interface, fixed_ips, mtu, is_sriov=False): port_interface = interface_file.PortInterfaceFile( name=interface, mtu=mtu, fixed_ips=fixed_ips, is_sriov=is_sriov) 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, encoding='utf-8') for line in out.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={ 'message': f'Error plugging {name}', 'details': e.output}, status=500))
[docs] class Ubuntu(BaseOS):
[docs] @classmethod def is_os_name(cls, os_name): return os_name in ['ubuntu', 'debian']
[docs] def cmd_get_version_of_installed_package(self, package_name): name = self._map_package_name(package_name) return f"dpkg-query -W -f=${{Version}} {name}"
[docs] class RH(BaseOS):
[docs] @classmethod def is_os_name(cls, os_name): return os_name in ['fedora', 'rhel', 'rocky']
[docs] def cmd_get_version_of_installed_package(self, package_name): name = self._map_package_name(package_name) return f"rpm -q --queryformat %{{VERSION}} {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']