557 lines
22 KiB
Python
557 lines
22 KiB
Python
#!/usr/bin/env python3
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# network.py - PVC client function library, Network fuctions
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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 socket
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import time
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import uuid
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import re
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import tempfile
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import subprocess
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import difflib
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import colorama
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import click
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import lxml.objectify
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import configparser
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import kazoo.client
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import client_lib.ansiiprint as ansiiprint
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import client_lib.zkhandler as zkhandler
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import client_lib.common as common
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#
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# Cluster search functions
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#
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def getClusterNetworkList(zk_conn):
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# Get a list of VNIs by listing the children of /networks
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vni_list = zk_conn.get_children('/networks')
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description_list = []
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# For each VNI, get the corresponding description from the data
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for vni in vni_list:
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description_list.append(zk_conn.get('/networks/{}'.format(vni))[0].decode('ascii'))
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return vni_list, description_list
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def searchClusterByVNI(zk_conn, vni):
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try:
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# Get the lists
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vni_list, description_list = getClusterNetworkList(zk_conn)
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# We're looking for UUID, so find that element ID
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index = vni_list.index(vni)
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# Get the name_list element at that index
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description = description_list[index]
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except ValueError:
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# We didn't find anything
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return None
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return description
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def searchClusterByDescription(zk_conn, description):
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try:
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# Get the lists
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vni_list, description_list = getClusterNetworkList(zk_conn)
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# We're looking for name, so find that element ID
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index = description_list.index(description)
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# Get the uuid_list element at that index
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vni = vni_list[index]
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except ValueError:
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# We didn't find anything
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return None
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return vni
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def getNetworkVNI(zk_conn, network):
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# Validate and obtain alternate passed value
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if network.isdigit():
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net_description = searchClusterByVNI(zk_conn, network)
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net_vni = searchClusterByDescription(zk_conn, net_description)
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else:
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net_vni = searchClusterByDescription(zk_conn, network)
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net_description = searchClusterByVNI(zk_conn, net_vni)
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return net_vni
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def getNetworkDescription(zk_conn, network):
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# Validate and obtain alternate passed value
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if network.isdigit():
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net_description = searchClusterByVNI(zk_conn, network)
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net_vni = searchClusterByDescription(zk_conn, net_description)
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else:
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net_vni = searchClusterByDescription(zk_conn, network)
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net_description = searchClusterByVNI(zk_conn, net_vni)
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return net_description
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def getNetworkDHCPReservations(zk_conn, vni):
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# Get a list of VNIs by listing the children of /networks/<vni>/dhcp_reservations
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dhcp_reservations = sorted(zk_conn.get_children('/networks/{}/dhcp_reservations'.format(vni)))
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return dhcp_reservations
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def getNetworkFirewallRules(zk_conn, vni):
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firewall_rules = zk_conn.get_children('/networks/{}/firewall_rules'.format(vni))
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return None
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def getNetworkInformation(zk_conn, vni):
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description = zk_conn.get('/networks/{}'.format(vni))[0].decode('ascii')
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domain = zk_conn.get('/networks/{}/domain'.format(vni))[0].decode('ascii')
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ip_network = zk_conn.get('/networks/{}/ip_network'.format(vni))[0].decode('ascii')
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ip_gateway = zk_conn.get('/networks/{}/ip_gateway'.format(vni))[0].decode('ascii')
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dhcp_flag = zk_conn.get('/networks/{}/dhcp_flag'.format(vni))[0].decode('ascii')
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return description, domain, ip_network, ip_gateway, dhcp_flag
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def getDHCPReservationInformation(zk_conn, vni, reservation):
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description = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}'.format(vni, reservation))
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ip_address = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}/ipv4addr'.format(vni, reservation))
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mac_address = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}/macaddr'.format(vni, reservation))
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return description, ip_address, mac_address
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def formatNetworkInformation(zk_conn, vni, long_output):
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description, ip_network, ip_gateway, dhcp_flag = getNetworkInformation(zk_conn, vni)
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if dhcp_flag:
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dhcp_flag_colour = ansiiprint.green()
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else:
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dhcp_flag_colour = ansiiprint.blue()
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colour_off = ansiiprint.end()
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# Format a nice output: do this line-by-line then concat the elements at the end
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ainformation = []
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ainformation.append('{}Virtual network information:{}'.format(ansiiprint.bold(), ansiiprint.end()))
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ainformation.append('')
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# Basic information
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ainformation.append('{}VNI:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), vni))
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ainformation.append('{}Description:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), description))
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ainformation.append('{}IP network:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), ip_network))
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ainformation.append('{}IP gateway:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), ip_gateway))
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ainformation.append('{}DHCP enabled:{} {}{}{}'.format(ansiiprint.purple(), ansiiprint.end(), dhcp_flag_colour, dhcp_flag, colour_off))
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if long_output:
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dhcp_reservations_list = zk_conn.get_children('/networks/{}/dhcp_reservations'.format(vni))
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if dhcp_reservations_list:
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ainformation.append('')
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ainformation.append('{}Client DHCP reservations:{}'.format(ansiiprint.bold(), ansiiprint.end()))
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ainformation.append('')
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dhcp_reservations_string = formatDHCPReservationList(zk_conn, vni, dhcp_reservations_list)
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for line in dhcp_reservations_string.split('\n'):
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ainformation.append(line)
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firewall_rules = zk_conn.get_children('/networks/{}/firewall_rules'.format(vni))
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if firewall_rules:
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ainformation.append('')
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ainformation.append('{}Network firewall rules:{}'.format(ansiiprint.bold(), ansiiprint.end()))
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ainformation.append('')
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formatted_firewall_rules = get_list_firewall_rules(zk_conn, vni)
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# Join it all together
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information = '\n'.join(ainformation)
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return information
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def formatNetworkList(zk_conn, net_list):
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net_list_output = []
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description = {}
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domain = {}
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ip_network = {}
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ip_gateway = {}
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dhcp_flag = {}
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dhcp_flag_colour = {}
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colour_off = ansiiprint.end()
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# Gather information for printing
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for net in net_list:
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# get info
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description[net], domain[net], ip_network[net], ip_gateway[net], dhcp_flag[net] = getNetworkInformation(zk_conn, net)
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if dhcp_flag[net]:
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dhcp_flag_colour[net] = ansiiprint.green()
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else:
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dhcp_flag_colour[net] = ansiiprint.blue()
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# Determine optimal column widths
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# Dynamic columns: node_name, hypervisor, migrated
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net_vni_length = 5
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net_description_length = 13
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net_domain_length = 8
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net_ip_network_length = 12
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net_ip_gateway_length = 9
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for net in net_list:
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# vni column
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_net_vni_length = len(net) + 1
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if _net_vni_length > net_vni_length:
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net_vni_length = _net_vni_length
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# description column
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_net_description_length = len(description[net]) + 1
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if _net_description_length > net_description_length:
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net_description_length = _net_description_length
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# domain column
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_net_domain_length = len(domain[net]) + 1
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if _net_domain_length > net_domain_length:
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net_domain_length = _net_domain_length
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# ip_network column
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_net_ip_network_length = len(ip_network[net]) + 1
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if _net_ip_network_length > net_ip_network_length:
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net_ip_network_length = _net_ip_network_length
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# ip_gateway column
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_net_ip_gateway_length = len(ip_gateway[net]) + 1
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if _net_ip_gateway_length > net_ip_gateway_length:
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net_ip_gateway_length = _net_ip_gateway_length
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# Format the string (header)
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net_list_output_header = '{bold}\
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{net_vni: <{net_vni_length}} \
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{net_description: <{net_description_length}} \
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{net_domain: <{net_domain_length}} \
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{net_ip_network: <{net_ip_network_length}} \
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{net_ip_gateway: <{net_ip_gateway_length}} \
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{net_dhcp_flag: <8}\
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{end_bold}'.format(
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bold=ansiiprint.bold(),
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end_bold=ansiiprint.end(),
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net_vni_length=net_vni_length,
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net_description_length=net_description_length,
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net_domain_length=net_domain_length,
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net_ip_network_length=net_ip_network_length,
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net_ip_gateway_length=net_ip_gateway_length,
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net_vni='VNI',
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net_description='Description',
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net_domain='Domain',
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net_ip_network='Network',
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net_ip_gateway='Gateway',
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net_dhcp_flag='DHCP'
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)
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for net in net_list:
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net_list_output.append(
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'{bold}\
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{net_vni: <{net_vni_length}} \
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{net_description: <{net_description_length}} \
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{net_domain: <{net_domain_length}} \
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{net_ip_network: <{net_ip_network_length}} \
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{net_ip_gateway: <{net_ip_gateway_length}} \
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{dhcp_flag_colour}{net_dhcp_flag: <8}{colour_off}\
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{end_bold}'.format(
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bold='',
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end_bold='',
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net_vni_length=net_vni_length,
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net_description_length=net_description_length,
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net_domain_length=net_domain_length,
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net_ip_network_length=net_ip_network_length,
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net_ip_gateway_length=net_ip_gateway_length,
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net_vni=net,
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net_description=description[net],
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net_domain=domain[net],
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net_ip_network=ip_network[net],
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net_ip_gateway=ip_gateway[net],
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net_dhcp_flag=dhcp_flag[net],
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dhcp_flag_colour=dhcp_flag_colour[net],
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colour_off=colour_off
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)
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)
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output_string = net_list_output_header + '\n' + '\n'.join(sorted(net_list_output))
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return output_string
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def formatDHCPReservationList(zk_conn, vni, dhcp_reservations_list):
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dhcp_reservation_list_output = []
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description = {}
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ip_address = {}
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mac_address = {}
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# Gather information for printing
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for dhcp_reservation in dhcp_reservations_list:
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# get info
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description[dhcp_reservation], ip_address[dhcp_reservation], mac_address[dhcp_reservation] = getDHCPReservationInformation(zk_conn, vni, dhcp_reservation)
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# Determine optimal column widths
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# Dynamic columns: node_name, hypervisor, migrated
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reservation_description_length = 13
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reservation_ip_address_length = 13
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reservation_mac_address_length = 13
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for dhcp_reservation in dhcp_reservations_list:
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# description column
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_reservation_description_length = len(description[dhcp_reservation]) + 1
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if _reservation_description_length > reservation_description_length:
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reservation_description_length = _reservation_description_length
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# ip_network column
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_reservation_ip_address_length = len(ip_address[dhcp_reservation]) + 1
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if _reservation_ip_address_length > reservation_ip_address_length:
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reservation_ip_address_length = _reservation_ip_address_length
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# ip_gateway column
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_reservation_mac_address_length = len(mac_address[dhcp_reservation]) + 1
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if _reservation_mac_address_length > reservation_mac_address_length:
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reservation_mac_address_length = _reservation_mac_address_length
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# Format the string (header)
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dhcp_reservation_list_output_header = '{bold}\
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{reservation_description: <{reservation_description_length}} \
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{reservation_ip_address: <{reservation_ip_address_length}} \
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{reservation_mac_address: <{reservation_mac_address_length}} \
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{end_bold}'.format(
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bold=ansiiprint.bold(),
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end_bold=ansiiprint.end(),
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reservation_description_length=reservation_description_length,
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reservation_ip_address_length=reservation_ip_address_length,
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reservation_mac_address_length=reservation_mac_address_length,
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reservation_description='Description',
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reservation_ip_address='IP Address',
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reservation_mac_address='MAC Address'
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)
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for dhcp_reservation in dhcp_reservations_list:
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dhcp_reservation_list_output.append('{bold}\
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{reservation_description: <{reservation_description_length}} \
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{reservation_ip_address: <{reservation_ip_address_length}} \
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{reservation_mac_address: <{reservation_mac_address_length}} \
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{end_bold}'.format(
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bold='',
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end_bold='',
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reservation_description_length=reservation_description_length,
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reservation_ip_address_length=reservation_ip_address_length,
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reservation_mac_address_length=reservation_mac_address_length,
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reservation_description=description[dhcp_reservation],
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reservation_ip_address=ip_address[dhcp_reservation],
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reservation_mac_address=mac_address[dhcp_reservation]
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)
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)
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output_string = dhcp_reservation_list_output_header + '\n' + '\n'.join(sorted(dhcp_reservation_list_output))
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return output_string
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def isValidMAC(macaddr):
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allowed = re.compile(r"""
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(
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^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$
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)
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""",
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re.VERBOSE|re.IGNORECASE)
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if allowed.match(macaddr) is None:
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return False
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else:
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return True
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def isValidIP(ipaddr):
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ip_blocks = str(ipaddr).split(".")
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if len(ip_blocks) == 4:
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for block in ip_blocks:
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# Check if number is digit, if not checked before calling this function
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if not block.isdigit():
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return False
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tmp = int(block)
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if 0 > tmp > 255:
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return False
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return True
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return False
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#
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# Direct functions
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#
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def add_network(zk_conn, vni, description, domain, ip_network, ip_gateway, dhcp_flag):
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if description == '':
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description = vni
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# Check if a network with this VNI already exists
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if zk_conn.exists('/networks/{}'.format(vni)):
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return False, 'ERROR: A network with VNI {} already exists!'.format(vni)
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# Add the new network to Zookeeper
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transaction = zk_conn.transaction()
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transaction.create('/networks/{}'.format(vni), description.encode('ascii'))
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transaction.create('/networks/{}/domain'.format(vni), domain.encode('ascii'))
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transaction.create('/networks/{}/ip_network'.format(vni), ip_network.encode('ascii'))
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transaction.create('/networks/{}/ip_gateway'.format(vni), ip_gateway.encode('ascii'))
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transaction.create('/networks/{}/dhcp_flag'.format(vni), str(dhcp_flag).encode('ascii'))
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transaction.create('/networks/{}/dhcp_reservations'.format(vni), ''.encode('ascii'))
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transaction.create('/networks/{}/firewall_rules'.format(vni), ''.encode('ascii'))
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results = transaction.commit()
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return True, 'Network "{}" added successfully!'.format(description)
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def modify_network(zk_conn, vni, **parameters):
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# Add the new network to Zookeeper
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transaction = zk_conn.transaction()
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if parameters['description'] != None:
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transaction.set_data('/networks/{}'.format(vni), parameters['description'].encode('ascii'))
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if parameters['ip_network'] != None:
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transaction.set_data('/networks/{}/ip_network'.format(vni), parameters['ip_network'].encode('ascii'))
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if parameters['ip_gateway'] != None:
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transaction.set_data('/networks/{}/ip_gateway'.format(vni), parameters['ip_gateway'].encode('ascii'))
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if parameters['dhcp_flag'] != None:
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transaction.set_data('/networks/{}/dhcp_flag'.format(vni), str(parameters['dhcp_flag']).encode('ascii'))
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results = transaction.commit()
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return True, 'Network "{}" modified successfully!'.format(vni)
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def remove_network(zk_conn, network):
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# Validate and obtain alternate passed value
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vni = getNetworkVNI(zk_conn, network)
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description = getNetworkDescription(zk_conn, network)
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if not vni:
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return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
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# Delete the configuration
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try:
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zk_conn.delete('/networks/{}'.format(vni), recursive=True)
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except:
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pass
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return True, 'Network "{}" removed successfully!'.format(description)
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def add_dhcp_reservation(zk_conn, network, ipaddress, macaddress, description):
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# Validate and obtain standard passed value
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net_vni = getNetworkVNI(zk_conn, network)
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if net_vni == None:
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return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
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# Use lowercase MAC format exclusively
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macaddress = macaddress.lower()
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if not isValidMAC(macaddress):
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return False, 'ERROR: MAC address "{}" is not valid! Always use ":" as a separator.'.format(macaddress)
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if not isValidIP(ipaddress):
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return False, 'ERROR: IP address "{}" is not valid!'.format(macaddress)
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if not description:
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description = macaddress
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if zk_conn.exists('/networks/{}/dhcp_reservations/{}'.format(net_vni, description)):
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return False, 'ERROR: A reservation with description {} already exists!'.format(description)
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# Add the new network to ZK
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try:
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zkhandler.writedata(zk_conn, {
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'/networks/{}/dhcp_reservations/{}'.format(net_vni, description): description,
|
|
'/networks/{}/dhcp_reservations/{}/macaddr'.format(net_vni, description): macaddress,
|
|
'/networks/{}/dhcp_reservations/{}/ipv4addr'.format(net_vni, description): ipaddress
|
|
})
|
|
except Exception as e:
|
|
return False, 'ERROR: Failed to write to Zookeeper! Exception: "{}".'.format(e)
|
|
|
|
return True, 'DHCP reservation "{}" added successfully!'.format(description)
|
|
|
|
def remove_dhcp_reservation(zk_conn, network, reservation):
|
|
# Validate and obtain standard passed value
|
|
net_vni = getNetworkVNI(zk_conn, network)
|
|
if net_vni == None:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
match_description = ''
|
|
|
|
# Check if the reservation matches a description, a mac, or an IP address currently in the database
|
|
reservation_list = zk_conn.get_children('/networks/{}/dhcp_reservations'.format(net_vni))
|
|
for description in reservation_list:
|
|
macaddress = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}/macaddr'.format(net_vni, description))
|
|
ipaddress = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}/ipv4addr'.format(net_vni, description))
|
|
if reservation == description or reservation == macaddress or reservation == ipaddress:
|
|
match_description = description
|
|
|
|
if not match_description:
|
|
return False, 'ERROR: No DHCP reservation exists matching "{}"!'.format(reservation)
|
|
|
|
# Remove the entry from zookeeper
|
|
try:
|
|
zk_conn.delete('/networks/{}/dhcp_reservations/{}'.format(net_vni, match_description), recursive=True)
|
|
except:
|
|
return False, 'ERROR: Failed to write to Zookeeper!'
|
|
|
|
return True, 'DHCP reservation "{}" removed successfully!'.format(match_description)
|
|
|
|
def get_info(zk_conn, network, long_output):
|
|
# Validate and obtain alternate passed value
|
|
net_vni = getNetworkVNI(zk_conn, network)
|
|
if net_vni == None:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
information = formatNetworkInformation(zk_conn, net_vni, long_output)
|
|
click.echo(information)
|
|
click.echo('')
|
|
|
|
return True, ''
|
|
|
|
def get_list(zk_conn, limit):
|
|
net_list = []
|
|
full_net_list = zk_conn.get_children('/networks')
|
|
|
|
for net in full_net_list:
|
|
description = zkhandler.readdata(zk_conn, '/networks/{}'.format(net))
|
|
if limit != None:
|
|
try:
|
|
# Implcitly assume fuzzy limits
|
|
if re.match('\^.*', limit) == None:
|
|
limit = '.*' + limit
|
|
if re.match('.*\$', limit) == None:
|
|
limit = limit + '.*'
|
|
|
|
if re.match(limit, net) != None:
|
|
net_list.append(net)
|
|
if re.match(limit, description) != None:
|
|
net_list.append(net)
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
else:
|
|
net_list.append(net)
|
|
|
|
output_string = formatNetworkList(zk_conn, net_list)
|
|
click.echo(output_string)
|
|
|
|
return True, ''
|
|
|
|
def get_list_dhcp_reservations(zk_conn, network, limit):
|
|
# Validate and obtain alternate passed value
|
|
net_vni = getNetworkVNI(zk_conn, network)
|
|
if net_vni == None:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
dhcp_reservations_list = []
|
|
full_dhcp_reservations_list = zk_conn.get_children('/networks/{}/dhcp_reservations'.format(net_vni))
|
|
|
|
for dhcp_reservation in full_dhcp_reservations_list:
|
|
if limit != None:
|
|
try:
|
|
# Implcitly assume fuzzy limits
|
|
if re.match('\^.*', limit) == None:
|
|
limit = '.*' + limit
|
|
if re.match('.*\$', limit) == None:
|
|
limit = limit + '.*'
|
|
|
|
if re.match(limit, net) != None:
|
|
dhcp_reservations_list.append(dhcp_reservation)
|
|
if re.match(limit, description) != None:
|
|
dhcp_reservations_list.append(dhcp_reservation)
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
else:
|
|
dhcp_reservations_list.append(dhcp_reservation)
|
|
|
|
output_string = formatDHCPReservationList(zk_conn, net_vni, dhcp_reservations_list)
|
|
click.echo(output_string)
|
|
|
|
return True, ''
|
|
|
|
def get_list_firewall_rules(zk_conn, network):
|
|
# Validate and obtain alternate passed value
|
|
net_vni = getNetworkVNI(zk_conn, network)
|
|
if net_vni == None:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
firewall_rules = getNetworkFirewallRules(zk_conn, net_vni)
|
|
return firewall_rules
|