8633d1a5bc
Used for setting up conntrackd between two clustered peers. Partially-implements: blueprint appliance-ha Change-Id: Ice3f4dbed02b877bc64ae73879a74acc26cca47e
94 lines
3.2 KiB
Python
94 lines
3.2 KiB
Python
# Copyright (c) 2016 Akanda, Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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from astara_router.drivers import base
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from astara_router import utils
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class ConntrackdManager(base.Manager):
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"""
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A class to provide facilities to interact with the conntrackd daemon.
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"""
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EXECUTABLE = 'service'
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CONFIG_FILE_TEMPLATE = os.path.join(
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os.path.dirname(__file__), 'conntrackd.conf.template')
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# Debian defaults
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CONFIG_FILE = '/etc/conntrackd/conntrackd.conf'
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# Debian installs this to /usr/share/doc/examples/sync but our
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# DIB recipe will install it here.
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NOTIFY_SCRIPT = '/etc/conntrackd/primary-backup.sh'
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def __init__(self, root_helper='sudo astara-rootwrap /etc/rootwrap.conf'):
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"""
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Initializes ConntrackdManager class.
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:type root_helper: str
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:param root_helper: System utility used to gain escalate privileges.
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"""
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super(ConntrackdManager, self).__init__(root_helper)
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self._config_templ = utils.load_template(self.CONFIG_FILE_TEMPLATE)
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self._should_restart = False
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def save_config(self, config, generic_to_host):
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"""
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Renders template and writes to the conntrackd file
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:type config: astara_router.models.Configuration
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:param config: An astara_router.models.Configuration object containing
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the ha_config configuration.
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:param generic_to_host: A callable used to resolve generic interface
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name to system interface name.
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"""
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mgt_interface = None
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for interface in config.interfaces:
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if interface.management:
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mgt_interface = interface
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break
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mgt_addr = mgt_interface.first_v6 or mgt_interface.first_v4
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ctxt = {
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'source_address': str(mgt_addr),
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'management_ip_version': mgt_addr.version,
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'destination_address': config.ha_config['peers'][0],
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'interface': generic_to_host(interface.ifname),
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}
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try:
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old_config_hash = utils.hash_file(self.CONFIG_FILE)
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except IOError:
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old_config_hash = None
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utils.replace_file(
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'/tmp/conntrackd.conf',
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self._config_templ.render(ctxt))
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utils.execute(
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['mv', '/tmp/conntrackd.conf', self.CONFIG_FILE],
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self.root_helper)
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if old_config_hash != utils.hash_file(self.CONFIG_FILE):
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self._should_restart = True
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def restart(self):
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"""
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Restarts the conntrackd daemon if config has been changed
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"""
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if not self._should_restart:
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return
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self.sudo('conntrackd', 'restart')
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