247 lines
8.9 KiB
Python
247 lines
8.9 KiB
Python
#!/usr/bin/env python3
|
|
|
|
# fencenode.py - Supplemental functions to handle fencing of nodes
|
|
# Part of the Parallel Virtual Cluster (PVC) system
|
|
#
|
|
# Copyright (C) 2018 Joshua M. Boniface <joshua@boniface.me>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
#
|
|
###############################################################################
|
|
|
|
import os, sys, libvirt, uuid, kazoo.client, lxml.objectify, click
|
|
|
|
#
|
|
# Validate a UUID
|
|
#
|
|
def validateUUID(dom_uuid):
|
|
try:
|
|
uuid.UUID(dom_uuid)
|
|
return True
|
|
except:
|
|
return False
|
|
|
|
|
|
#
|
|
# Connect and disconnect from Zookeeper
|
|
#
|
|
def startZKConnection(zk_host):
|
|
zk = kazoo.client.KazooClient(hosts=zk_host)
|
|
zk.start()
|
|
return zk
|
|
|
|
def stopZKConnection(zk):
|
|
zk.stop()
|
|
zk.close()
|
|
return 0
|
|
|
|
|
|
#
|
|
# XML information parsing functions
|
|
#
|
|
def getInformationFromXML(zk, uuid, long_output):
|
|
# Obtain the contents of the XML from Zookeeper
|
|
try:
|
|
xml = zk.get('/domains/%s/xml' % uuid)[0].decode('ascii')
|
|
dstate = zk.get('/domains/%s/state' % uuid)[0].decode('ascii')
|
|
dhypervisor = zk.get('/domains/%s/hypervisor' % uuid)[0].decode('ascii')
|
|
dlasthypervisor = zk.get('/domains/%s/lasthypervisor' % uuid)[0].decode('ascii')
|
|
except:
|
|
return None
|
|
|
|
if dlasthypervisor == '':
|
|
dlasthypervisor = 'N/A'
|
|
|
|
# Parse XML using lxml.objectify
|
|
parsed_xml = lxml.objectify.fromstring(xml)
|
|
|
|
# Get the information we want from it
|
|
duuid = parsed_xml.uuid
|
|
dname = parsed_xml.name
|
|
dmemory = parsed_xml.memory
|
|
dmemory_unit = parsed_xml.memory.attrib['unit']
|
|
dvcpu = parsed_xml.vcpu
|
|
try:
|
|
dvcputopo = '{}/{}/{}'.format(parsed_xml.cpu.topology.attrib['sockets'], parsed_xml.cpu.topology.attrib['cores'], parsed_xml.cpu.topology.attrib['threads'])
|
|
except:
|
|
dvcputopo = 'N/A'
|
|
dtype = parsed_xml.os.type
|
|
darch = parsed_xml.os.type.attrib['arch']
|
|
dmachine = parsed_xml.os.type.attrib['machine']
|
|
dfeatures = []
|
|
for feature in parsed_xml.features.getchildren():
|
|
dfeatures.append(feature.tag)
|
|
dconsole = parsed_xml.devices.console.attrib['type']
|
|
demulator = parsed_xml.devices.emulator
|
|
ddisks = []
|
|
dnets = []
|
|
dcontrollers = []
|
|
for device in parsed_xml.devices.getchildren():
|
|
if device.tag == 'disk':
|
|
disk_attrib = device.source.attrib
|
|
disk_target = device.target.attrib
|
|
disk_type = device.attrib['type']
|
|
if disk_type == 'network':
|
|
disk_obj = { 'type': disk_attrib.get('protocol'), 'name': disk_attrib.get('name'), 'dev': disk_target.get('dev'), 'bus': disk_target.get('bus') }
|
|
elif disk_type == 'file':
|
|
disk_obj = { 'type': 'file', 'name': disk_attrib.get('file'), 'dev': disk_target.get('dev'), 'bus': disk_target.get('bus') }
|
|
else:
|
|
disk_obj = {}
|
|
ddisks.append(disk_obj)
|
|
if device.tag == 'interface':
|
|
net_type = device.attrib['type']
|
|
net_mac = device.mac.attrib['address']
|
|
net_bridge = device.source.attrib[net_type]
|
|
net_model = device.model.attrib['type']
|
|
net_obj = { 'type': net_type, 'mac': net_mac, 'source': net_bridge, 'model': net_model }
|
|
dnets.append(net_obj)
|
|
if device.tag == 'controller':
|
|
controller_type = device.attrib['type']
|
|
try:
|
|
controller_model = device.attrib['model']
|
|
except KeyError:
|
|
controller_model = 'none'
|
|
controller_obj = { 'type': controller_type, 'model': controller_model }
|
|
dcontrollers.append(controller_obj)
|
|
|
|
# Format a nice output; do this line-by-line then concat the elements at the end
|
|
ainformation = []
|
|
ainformation.append('Virtual machine information:')
|
|
ainformation.append('')
|
|
# Basic information
|
|
ainformation.append('UUID: {}'.format(duuid))
|
|
ainformation.append('Name: {}'.format(dname))
|
|
ainformation.append('Memory: {} {}'.format(dmemory, dmemory_unit))
|
|
ainformation.append('vCPUs: {}'.format(dvcpu))
|
|
ainformation.append('Topology [S/C/T]: {}'.format(dvcputopo))
|
|
|
|
if long_output == True:
|
|
# Virtualization information
|
|
ainformation.append('')
|
|
ainformation.append('Emulator: {}'.format(demulator))
|
|
ainformation.append('Type: {}'.format(dtype))
|
|
ainformation.append('Arch: {}'.format(darch))
|
|
ainformation.append('Machine: {}'.format(dmachine))
|
|
ainformation.append('Features: {}'.format(' '.join(dfeatures)))
|
|
|
|
# PVC cluster information
|
|
ainformation.append('')
|
|
ainformation.append('State: {}'.format(dstate))
|
|
ainformation.append('Active Hypervisor: {}'.format(dhypervisor))
|
|
ainformation.append('Last Hypervisor: {}'.format(dlasthypervisor))
|
|
|
|
if long_output == True:
|
|
# Disk list
|
|
ainformation.append('')
|
|
ainformation.append('Disks: ID Type Name Dev Bus')
|
|
for disk in ddisks:
|
|
ainformation.append(' {0: <3} {1: <5} {2: <20} {3: <4} {4: <5}'.format(ddisks.index(disk), disk['type'], disk['name'], disk['dev'], disk['bus']))
|
|
# Network list
|
|
ainformation.append('')
|
|
ainformation.append('Interfaces: ID Type Source Model MAC')
|
|
for net in dnets:
|
|
ainformation.append(' {0: <3} {1: <8} {2: <8} {3: <8} {4: <17}'.format(dnets.index(net), net['type'], net['source'], net['model'], net['mac']))
|
|
# Controller list
|
|
ainformation.append('')
|
|
ainformation.append('Controllers: ID Type Model')
|
|
for controller in dcontrollers:
|
|
ainformation.append(' {0: <3} {1: <8} {2: <8}'.format(dcontrollers.index(controller), controller['type'], controller['model']))
|
|
|
|
# Join it all together
|
|
information = '\n'.join(ainformation)
|
|
return information
|
|
|
|
|
|
#
|
|
# Cluster search functions
|
|
#
|
|
def getClusterDomainList(zk):
|
|
# Get a list of UUIDs by listing the children of /domains
|
|
uuid_list = zk.get_children('/domains')
|
|
name_list = []
|
|
# For each UUID, get the corresponding name from the data
|
|
for uuid in uuid_list:
|
|
name_list.append(zk.get('/domains/%s' % uuid)[0].decode('ascii'))
|
|
return uuid_list, name_list
|
|
|
|
def searchClusterByUUID(zk, uuid):
|
|
try:
|
|
# Get the lists
|
|
uuid_list, name_list = getClusterDomainList(zk)
|
|
# We're looking for UUID, so find that element ID
|
|
index = uuid_list.index(uuid)
|
|
# Get the name_list element at that index
|
|
name = name_list[index]
|
|
except ValueError:
|
|
# We didn't find anything
|
|
return None
|
|
|
|
return name
|
|
|
|
def searchClusterByName(zk, name):
|
|
try:
|
|
# Get the lists
|
|
uuid_list, name_list = getClusterDomainList(zk)
|
|
# We're looking for name, so find that element ID
|
|
index = name_list.index(name)
|
|
# Get the uuid_list element at that index
|
|
uuid = uuid_list[index]
|
|
except ValueError:
|
|
# We didn't find anything
|
|
return None
|
|
|
|
return uuid
|
|
|
|
|
|
#
|
|
# Allow mutually exclusive options in Click
|
|
#
|
|
class MutuallyExclusiveOption(click.Option):
|
|
def __init__(self, *args, **kwargs):
|
|
meargs = kwargs.pop('mutually_exclusive', [])
|
|
_me_arg = []
|
|
_me_func = []
|
|
|
|
for arg in meargs:
|
|
_me_arg.append(arg['argument'])
|
|
_me_func.append(arg['function'])
|
|
|
|
self.me_arg = set(_me_arg)
|
|
self.me_func = set(_me_func)
|
|
|
|
help = kwargs.get('help', '')
|
|
if self.me_func:
|
|
ex_str = ', '.join(self.me_arg)
|
|
kwargs['help'] = help + (
|
|
' Mutually exclusive with `' + ex_str + '`.'
|
|
)
|
|
|
|
super(MutuallyExclusiveOption, self).__init__(*args, **kwargs)
|
|
|
|
def handle_parse_result(self, ctx, opts, args):
|
|
if self.me_func.intersection(opts) and self.name in opts:
|
|
raise click.UsageError(
|
|
"Illegal usage: `{}` is mutually exclusive with "
|
|
"arguments `{}`.".format(
|
|
self.opts[-1],
|
|
', '.join(self.me_arg)
|
|
)
|
|
)
|
|
|
|
return super(MutuallyExclusiveOption, self).handle_parse_result(
|
|
ctx,
|
|
opts,
|
|
args
|
|
)
|