Add router daemon
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196
router-daemon/pvcrd/VXNetworkInstance.py
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196
router-daemon/pvcrd/VXNetworkInstance.py
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#!/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 time
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import apscheduler
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import daemon_lib.ansiiprint as ansiiprint
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import daemon_lib.zkhandler as zkhandler
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class VXNetworkInstance():
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# Initialization function
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def __init__ (self, vni, zk_conn, config):
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self.vni = vni
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self.zk_conn = zk_conn
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self.vni_dev = config['vni_dev']
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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.corosync_provisioned = False
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self.watch_change = False
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self.update_timer = apscheduler.schedulers.background.BackgroundScheduler()
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self.update_timer.add_job(updateCorosyncResource, 'interval', seconds=1)
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# Zookeper handlers for changed states
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@zk_conn.DataWatch('/networks/{}/description'.format(self.vni))
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def watch_network_description(data, stat, event=''):
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try:
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self.description = data.decode('ascii')
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except AttributeError:
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self.description = self.vni
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self.watch_change = True
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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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try:
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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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except AttributeError:
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self.ip_network = ''
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self.ip_cidrnetmask = ''
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self.watch_change = True
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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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try:
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self.ip_gateway = data.decode('ascii')
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except AttributeError:
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self.ip_gateway = ''
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self.watch_change = True
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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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try:
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dhcp_flag = data.decode('ascii')
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self.dhcp_flag = ( dhcp_flag == 'True' )
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except AttributeError:
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self.dhcp_flag = False
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self.watch_change = True
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def createCorosyncResource(self):
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self.corosync_provisioned = True
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ansiiprint.echo('Creating Corosync resource for gateway {} on interface {}'.format(self.ip_gateway, self.vni), '', 'o')
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os.system(
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'echo "
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configure
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primitive vnivip_{0} ocf:heartbeat:IPaddr2 params ip={1} cidr_netmask={2} nic={3} op monitor interval=1s
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commit
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up
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resource
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start vnivip_{0}
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" | crm -f -'.format(
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self.description,
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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 removeCorosyncResource(self):
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ansiiprint.echo('Removing Corosync resource for gateway {} on interface {}'.format(self.ip_gateway, self.vni), '', 'o')
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os.system(
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'echo "
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resource
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stop vnivip_{0}
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up
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configure
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delete vnivip_{0}
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commit
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" | crm -f -'.format(
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self.description
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)
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)
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self.corosync_provisioned = False
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def createNetwork(self):
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ansiiprint.echo('Creating VNI {} device on interface {}'.format(self.vni, self.vni_dev), '', 'o')
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os.system(
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'ip link add {0} type vxlan id {1} dstport 4789 dev {2}'.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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os.system(
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'brctl addbr {0}'.format(
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self.bridge_nic
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)
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)
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os.system(
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'brctl addif {0} {1}'.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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os.system(
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'ip link set {0} up'.format(
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self.vxlan_nic
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)
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)
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os.system(
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'ip link set {0} up'.format(
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self.bridge_nic
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)
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)
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def removeNetwork(self):
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ansiiprint.echo('Removing VNI {} device on interface {}'.format(self.vni, self.vni_dev), '', 'o')
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os.system(
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'ip link set {0} down'.format(
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self.bridge_nic
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)
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)
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os.system(
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'ip link set {0} down'.format(
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self.vxlan_nic
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)
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)
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os.system(
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'brctl delif {0} {1}'.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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os.system(
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'brctl delbr {0}'.format(
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self.bridge_nic
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)
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)
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os.system(
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'ip link delete {0}'.format(
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self.vxlan_nic
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)
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)
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def updateCorosyncResource(self):
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if self.corosync_provisioned and self.watch_change:
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# Rebuild the resource
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removeCorosyncResource()
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createCorosyncResource()
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def provision(self):
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createNetwork()
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createCorosyncConfig()
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self.update_timer.start()
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def deprovision(self):
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self.update_timer.shutdown()
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removeCorosyncConfig()
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