238 lines
8.0 KiB
Python
238 lines
8.0 KiB
Python
#!/usr/bin/env python3
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# VXNetworkInstance.py - Class implementing a PVC VM network (router-side) and run by pvcrd
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import os
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import sys
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import daemon_lib.ansiiprint as ansiiprint
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import daemon_lib.zkhandler as zkhandler
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import daemon_lib.common as common
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import pvcrd.DHCPServer as DHCPServer
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class VXNetworkInstance():
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# Initialization function
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def __init__ (self, vni, zk_conn, config, this_router):
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self.vni = vni
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self.zk_conn = zk_conn
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self.this_router = this_router
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self.vni_dev = config['vni_dev']
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self.old_description = zkhandler.readdata(self.zk_conn, '/networks/{}'.format(self.vni))
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self.description = zkhandler.readdata(self.zk_conn, '/networks/{}'.format(self.vni))
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self.domain = zkhandler.readdata(self.zk_conn, '/networks/{}/domain'.format(self.vni))
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self.ip_gateway = zkhandler.readdata(self.zk_conn, '/networks/{}/ip_gateway'.format(self.vni))
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self.ip_network = zkhandler.readdata(self.zk_conn, '/networks/{}/ip_network'.format(self.vni))
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self.ip_cidrnetmask = self.ip_network.split('/')[-1]
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self.dhcp_flag = ( zkhandler.readdata(self.zk_conn, '/networks/{}/dhcp_flag'.format(self.vni)) == 'True' )
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self.vxlan_nic = 'vxlan{}'.format(self.vni)
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self.bridge_nic = 'br{}'.format(self.vni)
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self.dhcp_reservations = {}
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self.firewall_rules = {}
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self.createNetwork()
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# Zookeper handlers for changed states
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@zk_conn.DataWatch('/networks/{}'.format(self.vni))
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def watch_network_description(data, stat, event=''):
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if data != None and self.description != data.decode('ascii'):
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self.old_description = self.description
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self.description = data.decode('ascii')
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@zk_conn.DataWatch('/networks/{}/ip_network'.format(self.vni))
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def watch_network_ip_network(data, stat, event=''):
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if data != None and self.ip_network != data.decode('ascii'):
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ip_network = data.decode('ascii')
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self.ip_network = ip_network
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self.ip_cidrnetmask = ip_network.split('/')[-1]
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@zk_conn.DataWatch('/networks/{}/ip_gateway'.format(self.vni))
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def watch_network_gateway(data, stat, event=''):
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if data != None and self.ip_gateway != data.decode('ascii'):
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self.removeAddress()
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self.ip_gateway = data.decode('ascii')
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self.addAddress()
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@zk_conn.DataWatch('/networks/{}/dhcp_flag'.format(self.vni))
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def watch_network_dhcp_status(data, stat, event=''):
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if data != None and self.dhcp_flag != data.decode('ascii'):
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self.dhcp_flag = ( data.decode('ascii') == 'True' )
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if self.dhcp_flag:
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self.dhcp_instance = DHCPServer.DHCPServer(self.vni, self.config)
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else:
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self.dhcp_instance.remove()
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self.dhcp_instance = None
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@zk_conn.ChildrenWatch('/networks/{}/dhcp_reservations'.format(self.vni))
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def watch_network_dhcp_reservations(data, event=''):
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print(data)
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def getvni(self):
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return self.vni
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def createNetwork(self):
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ansiiprint.echo(
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'Creating VNI {} device on interface {}'.format(
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self.vni,
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self.vni_dev
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),
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'',
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'o'
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)
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common.run_os_command(
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'ip link add {} type vxlan id {} dstport 4789 dev {}'.format(
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self.vxlan_nic,
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self.vni,
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self.vni_dev
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)
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)
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common.run_os_command(
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'brctl addbr {}'.format(
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self.bridge_nic
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)
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)
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common.run_os_command(
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'brctl addif {} {}'.format(
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self.bridge_nic,
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self.vxlan_nic
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)
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)
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common.run_os_command(
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'ip link set {} up'.format(
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self.vxlan_nic
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)
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)
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common.run_os_command(
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'ip link set {} up'.format(
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self.bridge_nic
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)
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)
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def createGatewayAddress(self):
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if self.this_router.getnetworkstate() == 'primary':
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ansiiprint.echo(
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'Creating gateway {} on interface {} (VNI {})'.format(
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self.ip_gateway,
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self.bridge_nic,
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self.vni
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),
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'',
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'o'
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)
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common.run_os_command(
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'ip address add {}/{} dev {}'.format(
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self.ip_gateway,
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self.ip_cidrnetmask,
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self.bridge_nic
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)
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)
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common.run_os_command(
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'arping -A -c2 -I {} {}'.format(
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self.bridge_nic,
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self.ip_gateway
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),
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background=True
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)
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def startDHCPServer(self):
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if self.this_router.getnetworkstate() == 'primary':
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ansiiprint.echo(
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'Starting DHCP server on interface {} (VNI {})'.format(
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self.bridge_nic,
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self.vni
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),
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'',
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'o'
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)
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dhcp_configuration = DHCPServerConfiguration(
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zk_conn=self.zk_conn,
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ipaddr=self.ip_gateway,
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iface=self.bridge_nic,
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vni=self.vni,
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network=self.ip_network,
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router=[self.ip_gateway],
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dns_servers=[self.ip_gateway]
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)
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dhcp_configuration.debug = print
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self.dhcp_server = DHCPServer.DHCPServer(dhcp_configuration)
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self.dhcp_server.start()
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def removeNetwork(self):
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ansiiprint.echo(
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'Removing VNI {} device on interface {}'.format(
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self.vni,
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self.vni_dev
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),
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'',
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'o'
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)
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common.run_os_command(
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'ip link set {} down'.format(
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self.bridge_nic
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)
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)
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common.run_os_command(
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'ip link set {} down'.format(
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self.vxlan_nic
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)
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)
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common.run_os_command(
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'brctl delif {} {}'.format(
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self.bridge_nic,
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self.vxlan_nic
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)
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)
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common.run_os_command(
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'brctl delbr {}'.format(
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self.bridge_nic
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)
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)
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common.run_os_command(
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'ip link delete {}'.format(
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self.vxlan_nic
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)
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)
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def removeGatewayAddress(self):
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ansiiprint.echo(
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'Removing gateway {} from interface {} (VNI {})'.format(
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self.ip_gateway,
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self.bridge_nic,
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self.vni
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),
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'',
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'o'
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)
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common.run_os_command(
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'ip address delete {}/{} dev {}'.format(
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self.ip_gateway,
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self.ip_cidrnetmask,
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self.bridge_nic
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)
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)
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def stopDHCPServer(self):
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self.dhcp_server.close()
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