917b02c3da
This will grab the content present on config drive, and will create a bridge in top of network interface. Change-Id: I7b6788ad2640650329d80114439d731d51dab340
124 lines
3.8 KiB
Python
Executable File
124 lines
3.8 KiB
Python
Executable File
#!/usr/bin/python
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# Copyright (c) 2016 Yolanda Robla
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# Copyright (c) 2016 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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import os
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import subprocess
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import sys
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from glean import systemlock
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from glean.cmd import get_config_drive_interfaces, get_sys_interfaces
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def configure_bridge(interface, interface_name, bridge_name, vlan_raw_device):
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if interface['vlan_id']:
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vlan_content = 'vlan-raw-device %s' % vlan_raw_device
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else:
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vlan_content = ''
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network_file = '/etc/network/interfaces.d/%s.cfg' % interface_name
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# generate content depending on data
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file_content = """
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auto {net_name}
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iface {net_name} inet manual
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{vlan_content}
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auto {bridge_name}
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iface {bridge_name} inet static
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bridge_ports {net_name}
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bridge_hello 2
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bridge_maxage 12
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bridge_stp off
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address {ipv4_address}
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netmask {netmask}
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gateway {gateway}
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dns-nameservers {nameservers}
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"""
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file_content = file_content.format(
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net_name=interface_name, vlan_content=vlan_content,
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bridge_name=bridge_name,
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ipv4_address=interface['ip_address'],
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netmask=interface['netmask'],
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gateway=interface['routes'][0]['gateway'],
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nameservers=' '.join(interface['dns_nameservers']))
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with open(network_file, 'w') as target_file:
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target_file.write(file_content)
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# turn down pre-existing interface and start the bridge
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# because at this point, glean has already configured
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# previous interface that needs to be overriden.
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# This will only happen at first time that the bridge
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# is configured, because on reboots, we won't reach this
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# configure_bridge method
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subprocess.call(['ifdown', interface_name])
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subprocess.call(['ifup', bridge_name])
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# mock object to interact with glean
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class MockArgs(object):
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pass
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def main():
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network_info_file = '/mnt/config/openstack/latest/network_info.json'
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params = MockArgs()
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setattr(params, 'root', '/')
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setattr(params, 'noop', False)
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sys_interfaces = get_sys_interfaces(None, params)
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network_info = {}
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if os.path.exists(network_info_file):
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network_info = json.load(open(network_info_file))
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if not network_info:
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# we do not have entries on configdrive, skip
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sys.exit(0)
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interfaces = get_config_drive_interfaces(network_info)
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interface = interfaces[interfaces.keys()[0]]
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interface_name = sys_interfaces[interfaces.keys()[0]]
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if 'vlan_id' in interface:
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if interface['vlan_id'] in interface_name:
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# if we find the entry for the already configured vlan, trim it
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interface_name = interface_name.replace(
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'.' + interface['vlan_id'], '')
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vlan_raw_device = interface_name
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interface_name = "{0}.{1}".format(
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vlan_raw_device, interface['vlan_id'])
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# generate bridge name
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if 'vlan_id' in interface:
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bridge_name = 'br-vlan%s' % interface['vlan_id']
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else:
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bridge_name = 'br-eth'
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# only configure bridge if not exists
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if not os.path.exists('/sys/class/net/%s' % bridge_name):
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configure_bridge(interface, interface_name,
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bridge_name, vlan_raw_device)
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if __name__ == '__main__':
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with systemlock.Lock('/tmp/glean.lock'):
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sys.exit(main())
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