Joshua M. Boniface
f91c07fdcf
This *was* valuable when passing a full UUID in, so go back to that. Verify first that the limit string is an actual UUID, and then compare against it if applicable.
892 lines
32 KiB
Python
892 lines
32 KiB
Python
#!/usr/bin/env python3
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# vm.py - PVC client function library, VM fuctions
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2021 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, version 3.
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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 time
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import re
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import lxml.objectify
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import lxml.etree
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from uuid import UUID
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import daemon_lib.common as common
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import daemon_lib.ceph as ceph
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from daemon_lib.network import set_sriov_vf_vm, unset_sriov_vf_vm
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#
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# Cluster search functions
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#
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def getClusterDomainList(zkhandler):
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# Get a list of UUIDs by listing the children of /domains
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uuid_list = zkhandler.children('base.domain')
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name_list = []
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# For each UUID, get the corresponding name from the data
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for uuid in uuid_list:
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name_list.append(zkhandler.read(('domain', uuid)))
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return uuid_list, name_list
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def searchClusterByUUID(zkhandler, uuid):
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try:
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# Get the lists
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uuid_list, name_list = getClusterDomainList(zkhandler)
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# We're looking for UUID, so find that element ID
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index = uuid_list.index(uuid)
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# Get the name_list element at that index
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name = name_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 name
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def searchClusterByName(zkhandler, name):
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try:
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# Get the lists
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uuid_list, name_list = getClusterDomainList(zkhandler)
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# We're looking for name, so find that element ID
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index = name_list.index(name)
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# Get the uuid_list element at that index
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uuid = uuid_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 uuid
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def getDomainUUID(zkhandler, domain):
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# Validate that VM exists in cluster
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if common.validateUUID(domain):
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dom_name = searchClusterByUUID(zkhandler, domain)
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dom_uuid = searchClusterByName(zkhandler, dom_name)
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else:
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dom_uuid = searchClusterByName(zkhandler, domain)
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dom_name = searchClusterByUUID(zkhandler, dom_uuid)
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return dom_uuid
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def getDomainName(zkhandler, domain):
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# Validate that VM exists in cluster
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if common.validateUUID(domain):
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dom_name = searchClusterByUUID(zkhandler, domain)
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dom_uuid = searchClusterByName(zkhandler, dom_name)
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else:
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dom_uuid = searchClusterByName(zkhandler, domain)
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dom_name = searchClusterByUUID(zkhandler, dom_uuid)
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return dom_name
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#
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# Helper functions
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#
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def change_state(zkhandler, dom_uuid, new_state):
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lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
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with lock:
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zkhandler.write([
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(('domain.state', dom_uuid), new_state)
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])
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# Wait for 1/2 second to allow state to flow to all nodes
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time.sleep(0.5)
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#
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# Direct functions
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#
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def is_migrated(zkhandler, domain):
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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last_node = zkhandler.read(('domain.last_node', dom_uuid))
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if last_node:
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return True
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else:
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return False
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def flush_locks(zkhandler, domain):
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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# Verify that the VM is in a stopped state; freeing locks is not safe otherwise
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state = zkhandler.read(('domain.state', dom_uuid))
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if state != 'stop':
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return False, 'ERROR: VM "{}" is not in stopped state; flushing RBD locks on a running VM is dangerous.'.format(domain)
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# Tell the cluster to create a new OSD for the host
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flush_locks_string = 'flush_locks {}'.format(dom_uuid)
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zkhandler.write([
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('base.cmd.domain', flush_locks_string)
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])
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# Wait 1/2 second for the cluster to get the message and start working
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time.sleep(0.5)
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# Acquire a read lock, so we get the return exclusively
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lock = zkhandler.readlock('base.cmd.domain')
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with lock:
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try:
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result = zkhandler.read('base.cmd.domain').split()[0]
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if result == 'success-flush_locks':
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message = 'Flushed locks on VM "{}"'.format(domain)
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success = True
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else:
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message = 'ERROR: Failed to flush locks on VM "{}"; check node logs for details.'.format(domain)
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success = False
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except Exception:
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message = 'ERROR: Command ignored by node.'
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success = False
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# Acquire a write lock to ensure things go smoothly
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lock = zkhandler.writelock('base.cmd.domain')
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with lock:
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time.sleep(0.5)
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zkhandler.write([
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('base.cmd.domain', '')
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])
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return success, message
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def define_vm(zkhandler, config_data, target_node, node_limit, node_selector, node_autostart, migration_method=None, profile=None, initial_state='stop'):
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# Parse the XML data
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try:
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parsed_xml = lxml.objectify.fromstring(config_data)
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except Exception:
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return False, 'ERROR: Failed to parse XML data.'
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dom_uuid = parsed_xml.uuid.text
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dom_name = parsed_xml.name.text
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# Ensure that the UUID and name are unique
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if searchClusterByUUID(zkhandler, dom_uuid) or searchClusterByName(zkhandler, dom_name):
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return False, 'ERROR: Specified VM "{}" or UUID "{}" matches an existing VM on the cluster'.format(dom_name, dom_uuid)
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if not target_node:
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target_node = common.findTargetNode(zkhandler, dom_uuid)
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else:
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# Verify node is valid
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valid_node = common.verifyNode(zkhandler, target_node)
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if not valid_node:
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return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
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# If a SR-IOV network device is being added, set its used state
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dnetworks = common.getDomainNetworks(parsed_xml, {})
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for network in dnetworks:
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if network['type'] in ['direct', 'hostdev']:
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dom_node = zkhandler.read(('domain.node', dom_uuid))
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# Check if the network is already in use
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is_used = zkhandler.read(('node.sriov.vf', dom_node, 'sriov_vf.used', network['source']))
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if is_used == 'True':
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used_by_name = searchClusterByUUID(zkhandler, zkhandler.read(('node.sriov.vf', dom_node, 'sriov_vf.used_by', network['source'])))
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return False, 'ERROR: Attempted to use SR-IOV network "{}" which is already used by VM "{}" on node "{}".'.format(network['source'], used_by_name, dom_node)
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# We must update the "used" section
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set_sriov_vf_vm(zkhandler, dom_uuid, dom_node, network['source'], network['mac'], network['type'])
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# Obtain the RBD disk list using the common functions
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ddisks = common.getDomainDisks(parsed_xml, {})
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rbd_list = []
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for disk in ddisks:
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if disk['type'] == 'rbd':
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rbd_list.append(disk['name'])
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# Join the limit
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if isinstance(node_limit, list) and node_limit:
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formatted_node_limit = ','.join(node_limit)
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else:
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formatted_node_limit = ''
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# Join the RBD list
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if isinstance(rbd_list, list) and rbd_list:
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formatted_rbd_list = ','.join(rbd_list)
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else:
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formatted_rbd_list = ''
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# Add the new domain to Zookeeper
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zkhandler.write([
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(('domain', dom_uuid), dom_name),
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(('domain.xml', dom_uuid), config_data),
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(('domain.state', dom_uuid), initial_state),
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(('domain.profile', dom_uuid), profile),
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(('domain.stats', dom_uuid), ''),
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(('domain.node', dom_uuid), target_node),
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(('domain.last_node', dom_uuid), ''),
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(('domain.failed_reason', dom_uuid), ''),
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(('domain.storage.volumes', dom_uuid), formatted_rbd_list),
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(('domain.console.log', dom_uuid), ''),
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(('domain.console.vnc', dom_uuid), ''),
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(('domain.meta.autostart', dom_uuid), node_autostart),
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(('domain.meta.migrate_method', dom_uuid), migration_method),
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(('domain.meta.node_limit', dom_uuid), formatted_node_limit),
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(('domain.meta.node_selector', dom_uuid), node_selector),
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(('domain.migrate.sync_lock', dom_uuid), ''),
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])
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return True, 'Added new VM with Name "{}" and UUID "{}" to database.'.format(dom_name, dom_uuid)
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def modify_vm_metadata(zkhandler, domain, node_limit, node_selector, node_autostart, provisioner_profile, migration_method):
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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update_list = list()
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if node_limit is not None:
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update_list.append((('domain.meta.node_limit', dom_uuid), node_limit))
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if node_selector is not None:
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update_list.append((('domain.meta.node_selector', dom_uuid), node_selector))
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if node_autostart is not None:
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update_list.append((('domain.meta.autostart', dom_uuid), node_autostart))
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if provisioner_profile is not None:
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update_list.append((('domain.profile', dom_uuid), provisioner_profile))
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if migration_method is not None:
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update_list.append((('domain.meta.migrate_method', dom_uuid), migration_method))
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if len(update_list) < 1:
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return False, 'ERROR: No updates to apply.'
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zkhandler.write(update_list)
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return True, 'Successfully modified PVC metadata of VM "{}".'.format(domain)
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def modify_vm(zkhandler, domain, restart, new_vm_config):
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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dom_name = getDomainName(zkhandler, domain)
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# Parse and valiate the XML
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try:
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parsed_xml = lxml.objectify.fromstring(new_vm_config)
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except Exception:
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return False, 'ERROR: Failed to parse new XML data.'
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# Get our old network list for comparison purposes
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old_vm_config = zkhandler.read(('domain.xml', dom_uuid))
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old_parsed_xml = lxml.objectify.fromstring(old_vm_config)
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old_dnetworks = common.getDomainNetworks(old_parsed_xml, {})
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# If a SR-IOV network device is being added, set its used state
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dnetworks = common.getDomainNetworks(parsed_xml, {})
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for network in dnetworks:
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# Ignore networks that are already there
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if network['source'] in [net['source'] for net in old_dnetworks]:
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continue
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if network['type'] in ['direct', 'hostdev']:
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dom_node = zkhandler.read(('domain.node', dom_uuid))
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# Check if the network is already in use
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is_used = zkhandler.read(('node.sriov.vf', dom_node, 'sriov_vf.used', network['source']))
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if is_used == 'True':
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used_by_name = searchClusterByUUID(zkhandler, zkhandler.read(('node.sriov.vf', dom_node, 'sriov_vf.used_by', network['source'])))
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return False, 'ERROR: Attempted to use SR-IOV network "{}" which is already used by VM "{}" on node "{}".'.format(network['source'], used_by_name, dom_node)
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# We must update the "used" section
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set_sriov_vf_vm(zkhandler, dom_uuid, dom_node, network['source'], network['mac'], network['type'])
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# If a SR-IOV network device is being removed, unset its used state
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for network in old_dnetworks:
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if network['type'] in ['direct', 'hostdev']:
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if network['mac'] not in [n['mac'] for n in dnetworks]:
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dom_node = zkhandler.read(('domain.node', dom_uuid))
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# We must update the "used" section
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unset_sriov_vf_vm(zkhandler, dom_node, network['source'])
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# Obtain the RBD disk list using the common functions
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ddisks = common.getDomainDisks(parsed_xml, {})
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rbd_list = []
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for disk in ddisks:
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if disk['type'] == 'rbd':
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rbd_list.append(disk['name'])
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# Join the RBD list
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if isinstance(rbd_list, list) and rbd_list:
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formatted_rbd_list = ','.join(rbd_list)
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else:
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formatted_rbd_list = ''
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# Add the modified config to Zookeeper
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zkhandler.write([
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(('domain', dom_uuid), dom_name),
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(('domain.storage.volumes', dom_uuid), formatted_rbd_list),
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(('domain.xml', dom_uuid), new_vm_config),
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])
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if restart:
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change_state(zkhandler, dom_uuid, 'restart')
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return True, 'Successfully modified configuration of VM "{}".'.format(domain)
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def dump_vm(zkhandler, domain):
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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# Gram the domain XML and dump it to stdout
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vm_xml = zkhandler.read(('domain.xml', dom_uuid))
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return True, vm_xml
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def rename_vm(zkhandler, domain, new_domain):
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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# Verify that the VM is in a stopped state; renaming is not supported otherwise
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state = zkhandler.read(('domain.state', dom_uuid))
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if state != 'stop':
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return False, 'ERROR: VM "{}" is not in stopped state; VMs cannot be renamed while running.'.format(domain)
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# Parse and valiate the XML
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vm_config = common.getDomainXML(zkhandler, dom_uuid)
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# Obtain the RBD disk list using the common functions
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ddisks = common.getDomainDisks(vm_config, {})
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pool_list = []
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rbd_list = []
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for disk in ddisks:
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if disk['type'] == 'rbd':
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pool_list.append(disk['name'].split('/')[0])
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rbd_list.append(disk['name'].split('/')[1])
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# Rename each volume in turn
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for idx, rbd in enumerate(rbd_list):
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rbd_new = re.sub(r"{}".format(domain), new_domain, rbd)
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# Skip renaming if nothing changed
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if rbd_new == rbd:
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continue
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ceph.rename_volume(zkhandler, pool_list[idx], rbd, rbd_new)
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# Replace the name in the config
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vm_config_new = lxml.etree.tostring(vm_config, encoding='ascii', method='xml').decode().replace(domain, new_domain)
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# Get VM information
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_b, dom_info = get_info(zkhandler, dom_uuid)
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# Undefine the old VM
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undefine_vm(zkhandler, dom_uuid)
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# Define the new VM
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define_vm(zkhandler, vm_config_new, dom_info['node'], dom_info['node_limit'], dom_info['node_selector'], dom_info['node_autostart'], migration_method=dom_info['migration_method'], profile=dom_info['profile'], initial_state='stop')
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# If the VM is migrated, store that
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if dom_info['migrated'] != 'no':
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zkhandler.write([
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(('domain.last_node', dom_uuid), dom_info['last_node'])
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])
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return True, 'Successfully renamed VM "{}" to "{}".'.format(domain, new_domain)
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def undefine_vm(zkhandler, domain):
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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# Shut down the VM
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current_vm_state = zkhandler.read(('domain.state', dom_uuid))
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if current_vm_state != 'stop':
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change_state(zkhandler, dom_uuid, 'stop')
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# Gracefully terminate the class instances
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change_state(zkhandler, dom_uuid, 'delete')
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# Delete the configurations
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zkhandler.delete([
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('domain', dom_uuid)
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])
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return True, 'Undefined VM "{}" from the cluster.'.format(domain)
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def remove_vm(zkhandler, domain):
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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disk_list = common.getDomainDiskList(zkhandler, dom_uuid)
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# Shut down the VM
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current_vm_state = zkhandler.read(('domain.state', dom_uuid))
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if current_vm_state != 'stop':
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change_state(zkhandler, dom_uuid, 'stop')
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# Gracefully terminate the class instances
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change_state(zkhandler, dom_uuid, 'delete')
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# Delete the configurations
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zkhandler.delete([
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('domain', dom_uuid)
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])
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# Wait for 1 second to allow state to flow to all nodes
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time.sleep(1)
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# Remove disks
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for disk in disk_list:
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# vmpool/vmname_volume
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try:
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disk_pool, disk_name = disk.split('/')
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retcode, message = ceph.remove_volume(zkhandler, disk_pool, disk_name)
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except ValueError:
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continue
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return True, 'Removed VM "{}" and disks from the cluster.'.format(domain)
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def start_vm(zkhandler, domain):
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Set the VM to start
|
|
change_state(zkhandler, dom_uuid, 'start')
|
|
|
|
return True, 'Starting VM "{}".'.format(domain)
|
|
|
|
|
|
def restart_vm(zkhandler, domain, wait=False):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get state and verify we're OK to proceed
|
|
current_state = zkhandler.read(('domain.state', dom_uuid))
|
|
if current_state != 'start':
|
|
return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain)
|
|
|
|
retmsg = 'Restarting VM "{}".'.format(domain)
|
|
|
|
# Set the VM to restart
|
|
change_state(zkhandler, dom_uuid, 'restart')
|
|
|
|
if wait:
|
|
while zkhandler.read(('domain.state', dom_uuid)) == 'restart':
|
|
time.sleep(0.5)
|
|
retmsg = 'Restarted VM "{}"'.format(domain)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def shutdown_vm(zkhandler, domain, wait=False):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get state and verify we're OK to proceed
|
|
current_state = zkhandler.read(('domain.state', dom_uuid))
|
|
if current_state != 'start':
|
|
return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain)
|
|
|
|
retmsg = 'Shutting down VM "{}"'.format(domain)
|
|
|
|
# Set the VM to shutdown
|
|
change_state(zkhandler, dom_uuid, 'shutdown')
|
|
|
|
if wait:
|
|
while zkhandler.read(('domain.state', dom_uuid)) == 'shutdown':
|
|
time.sleep(0.5)
|
|
retmsg = 'Shut down VM "{}"'.format(domain)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def stop_vm(zkhandler, domain):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Set the VM to stop
|
|
change_state(zkhandler, dom_uuid, 'stop')
|
|
|
|
return True, 'Forcibly stopping VM "{}".'.format(domain)
|
|
|
|
|
|
def disable_vm(zkhandler, domain):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get state and verify we're OK to proceed
|
|
current_state = zkhandler.read(('domain.state', dom_uuid))
|
|
if current_state != 'stop':
|
|
return False, 'ERROR: VM "{}" must be stopped before disabling!'.format(domain)
|
|
|
|
# Set the VM to disable
|
|
change_state(zkhandler, dom_uuid, 'disable')
|
|
|
|
return True, 'Marked VM "{}" as disable.'.format(domain)
|
|
|
|
|
|
def update_vm_sriov_nics(zkhandler, dom_uuid, source_node, target_node):
|
|
# Update all the SR-IOV device states on both nodes, used during migrations but called by the node-side
|
|
vm_config = zkhandler.read(('domain.xml', dom_uuid))
|
|
parsed_xml = lxml.objectify.fromstring(vm_config)
|
|
dnetworks = common.getDomainNetworks(parsed_xml, {})
|
|
retcode = True
|
|
retmsg = ''
|
|
for network in dnetworks:
|
|
if network['type'] in ['direct', 'hostdev']:
|
|
# Check if the network is already in use
|
|
is_used = zkhandler.read(('node.sriov.vf', target_node, 'sriov_vf.used', network['source']))
|
|
if is_used == 'True':
|
|
used_by_name = searchClusterByUUID(zkhandler, zkhandler.read(('node.sriov.vf', target_node, 'sriov_vf.used_by', network['source'])))
|
|
if retcode:
|
|
retcode_this = False
|
|
retmsg = 'Attempting to use SR-IOV network "{}" which is already used by VM "{}"'.format(network['source'], used_by_name)
|
|
else:
|
|
retcode_this = True
|
|
|
|
# We must update the "used" section
|
|
if retcode_this:
|
|
# This conditional ensure that if we failed the is_used check, we don't try to overwrite the information of a VF that belongs to another VM
|
|
set_sriov_vf_vm(zkhandler, dom_uuid, target_node, network['source'], network['mac'], network['type'])
|
|
# ... but we still want to free the old node in an case
|
|
unset_sriov_vf_vm(zkhandler, source_node, network['source'])
|
|
|
|
if not retcode_this:
|
|
retcode = retcode_this
|
|
|
|
return retcode, retmsg
|
|
|
|
|
|
def move_vm(zkhandler, domain, target_node, wait=False, force_live=False):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get state and verify we're OK to proceed
|
|
current_state = zkhandler.read(('domain.state', dom_uuid))
|
|
if current_state != 'start':
|
|
# If the current state isn't start, preserve it; we're not doing live migration
|
|
target_state = current_state
|
|
else:
|
|
if force_live:
|
|
target_state = 'migrate-live'
|
|
else:
|
|
target_state = 'migrate'
|
|
|
|
current_node = zkhandler.read(('domain.node', dom_uuid))
|
|
|
|
if not target_node:
|
|
target_node = common.findTargetNode(zkhandler, dom_uuid)
|
|
else:
|
|
# Verify node is valid
|
|
valid_node = common.verifyNode(zkhandler, target_node)
|
|
if not valid_node:
|
|
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
|
|
|
|
# Check if node is within the limit
|
|
node_limit = zkhandler.read(('domain.meta.node_limit', dom_uuid))
|
|
if node_limit and target_node not in node_limit.split(','):
|
|
return False, 'ERROR: Specified node "{}" is not in the allowed list of nodes for VM "{}".'.format(target_node, domain)
|
|
|
|
# Verify if node is current node
|
|
if target_node == current_node:
|
|
last_node = zkhandler.read(('domain.last_node', dom_uuid))
|
|
if last_node:
|
|
zkhandler.write([
|
|
(('domain.last_node', dom_uuid), '')
|
|
])
|
|
return True, 'Making temporary migration permanent for VM "{}".'.format(domain)
|
|
|
|
return False, 'ERROR: VM "{}" is already running on node "{}".'.format(domain, current_node)
|
|
|
|
if not target_node:
|
|
return False, 'ERROR: Could not find a valid migration target for VM "{}".'.format(domain)
|
|
|
|
retmsg = 'Permanently migrating VM "{}" to node "{}".'.format(domain, target_node)
|
|
|
|
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
|
|
with lock:
|
|
zkhandler.write([
|
|
(('domain.state', dom_uuid), target_state),
|
|
(('domain.node', dom_uuid), target_node),
|
|
(('domain.last_node', dom_uuid), '')
|
|
])
|
|
|
|
# Wait for 1/2 second for migration to start
|
|
time.sleep(0.5)
|
|
|
|
# Update any SR-IOV NICs
|
|
update_vm_sriov_nics(zkhandler, dom_uuid, current_node, target_node)
|
|
|
|
if wait:
|
|
while zkhandler.read(('domain.state', dom_uuid)) == target_state:
|
|
time.sleep(0.5)
|
|
retmsg = 'Permanently migrated VM "{}" to node "{}"'.format(domain, target_node)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def migrate_vm(zkhandler, domain, target_node, force_migrate, wait=False, force_live=False):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get state and verify we're OK to proceed
|
|
current_state = zkhandler.read(('domain.state', dom_uuid))
|
|
if current_state != 'start':
|
|
# If the current state isn't start, preserve it; we're not doing live migration
|
|
target_state = current_state
|
|
else:
|
|
if force_live:
|
|
target_state = 'migrate-live'
|
|
else:
|
|
target_state = 'migrate'
|
|
|
|
current_node = zkhandler.read(('domain.node', dom_uuid))
|
|
last_node = zkhandler.read(('domain.last_node', dom_uuid))
|
|
|
|
if last_node and not force_migrate:
|
|
return False, 'ERROR: VM "{}" has been previously migrated.'.format(domain)
|
|
|
|
if not target_node:
|
|
target_node = common.findTargetNode(zkhandler, dom_uuid)
|
|
else:
|
|
# Verify node is valid
|
|
valid_node = common.verifyNode(zkhandler, target_node)
|
|
if not valid_node:
|
|
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
|
|
|
|
# Check if node is within the limit
|
|
node_limit = zkhandler.read(('domain.meta.node_limit', dom_uuid))
|
|
if node_limit and target_node not in node_limit.split(','):
|
|
return False, 'ERROR: Specified node "{}" is not in the allowed list of nodes for VM "{}".'.format(target_node, domain)
|
|
|
|
# Verify if node is current node
|
|
if target_node == current_node:
|
|
return False, 'ERROR: VM "{}" is already running on node "{}".'.format(domain, current_node)
|
|
|
|
if not target_node:
|
|
return False, 'ERROR: Could not find a valid migration target for VM "{}".'.format(domain)
|
|
|
|
# Don't overwrite an existing last_node when using force_migrate
|
|
real_current_node = current_node # Used for the SR-IOV update
|
|
if last_node and force_migrate:
|
|
current_node = last_node
|
|
|
|
retmsg = 'Migrating VM "{}" to node "{}".'.format(domain, target_node)
|
|
|
|
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
|
|
with lock:
|
|
zkhandler.write([
|
|
(('domain.state', dom_uuid), target_state),
|
|
(('domain.node', dom_uuid), target_node),
|
|
(('domain.last_node', dom_uuid), current_node)
|
|
])
|
|
|
|
# Wait for 1/2 second for migration to start
|
|
time.sleep(0.5)
|
|
|
|
# Update any SR-IOV NICs
|
|
update_vm_sriov_nics(zkhandler, dom_uuid, real_current_node, target_node)
|
|
|
|
if wait:
|
|
while zkhandler.read(('domain.state', dom_uuid)) == target_state:
|
|
time.sleep(0.5)
|
|
retmsg = 'Migrated VM "{}" to node "{}"'.format(domain, target_node)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def unmigrate_vm(zkhandler, domain, wait=False, force_live=False):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get state and verify we're OK to proceed
|
|
current_state = zkhandler.read(('domain.state', dom_uuid))
|
|
if current_state != 'start':
|
|
# If the current state isn't start, preserve it; we're not doing live migration
|
|
target_state = current_state
|
|
else:
|
|
if force_live:
|
|
target_state = 'migrate-live'
|
|
else:
|
|
target_state = 'migrate'
|
|
|
|
current_node = zkhandler.read(('domain.node', dom_uuid))
|
|
target_node = zkhandler.read(('domain.last_node', dom_uuid))
|
|
|
|
if target_node == '':
|
|
return False, 'ERROR: VM "{}" has not been previously migrated.'.format(domain)
|
|
|
|
retmsg = 'Unmigrating VM "{}" back to node "{}".'.format(domain, target_node)
|
|
|
|
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
|
|
with lock:
|
|
zkhandler.write([
|
|
(('domain.state', dom_uuid), target_state),
|
|
(('domain.node', dom_uuid), target_node),
|
|
(('domain.last_node', dom_uuid), '')
|
|
])
|
|
|
|
# Wait for 1/2 second for migration to start
|
|
time.sleep(0.5)
|
|
|
|
# Update any SR-IOV NICs
|
|
update_vm_sriov_nics(zkhandler, dom_uuid, current_node, target_node)
|
|
|
|
if wait:
|
|
while zkhandler.read(('domain.state', dom_uuid)) == target_state:
|
|
time.sleep(0.5)
|
|
retmsg = 'Unmigrated VM "{}" back to node "{}"'.format(domain, target_node)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def get_console_log(zkhandler, domain, lines=1000):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
|
|
|
|
# Get the data from ZK
|
|
console_log = zkhandler.read(('domain.log.console', dom_uuid))
|
|
|
|
# Shrink the log buffer to length lines
|
|
shrunk_log = console_log.split('\n')[-lines:]
|
|
loglines = '\n'.join(shrunk_log)
|
|
|
|
return True, loglines
|
|
|
|
|
|
def get_info(zkhandler, domain):
|
|
# Validate that VM exists in cluster
|
|
dom_uuid = getDomainUUID(zkhandler, domain)
|
|
if not dom_uuid:
|
|
return False, 'ERROR: No VM named "{}" is present in the cluster.'.format(domain)
|
|
|
|
# Gather information from XML config and print it
|
|
domain_information = common.getInformationFromXML(zkhandler, dom_uuid)
|
|
if not domain_information:
|
|
return False, 'ERROR: Could not get information about VM "{}".'.format(domain)
|
|
|
|
return True, domain_information
|
|
|
|
|
|
def get_list(zkhandler, node, state, limit, is_fuzzy=True):
|
|
if node:
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, 'Specified node "{}" is invalid.'.format(node)
|
|
|
|
if state:
|
|
valid_states = ['start', 'restart', 'shutdown', 'stop', 'disable', 'fail', 'migrate', 'unmigrate', 'provision']
|
|
if state not in valid_states:
|
|
return False, 'VM state "{}" is not valid.'.format(state)
|
|
|
|
full_vm_list = zkhandler.children('base.domain')
|
|
|
|
# Set our limit to a sensible regex
|
|
if limit:
|
|
# Check if the limit is a UUID
|
|
is_limit_uuid = False
|
|
try:
|
|
uuid_obj = UUID(limit, version=4)
|
|
limit = str(uuid_obj)
|
|
is_limit_uuid = True
|
|
except ValueError:
|
|
pass
|
|
|
|
if is_fuzzy and not is_limit_uuid:
|
|
try:
|
|
# Implcitly assume fuzzy limits
|
|
if not re.match(r'\^.*', limit):
|
|
limit = '.*' + limit
|
|
if not re.match(r'.*\$', limit):
|
|
limit = limit + '.*'
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
|
|
get_vm_info = dict()
|
|
for vm in full_vm_list:
|
|
name = zkhandler.read(('domain', vm))
|
|
is_limit_match = False
|
|
is_node_match = False
|
|
is_state_match = False
|
|
|
|
# Check on limit
|
|
if limit:
|
|
# Try to match the limit against the UUID (if applicable) and name
|
|
try:
|
|
if is_limit_uuid and re.match(limit, vm):
|
|
is_limit_match = True
|
|
if re.match(limit, name):
|
|
is_limit_match = True
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
else:
|
|
is_limit_match = True
|
|
|
|
# Check on node
|
|
if node:
|
|
vm_node = zkhandler.read(('domain.node', vm))
|
|
if vm_node == node:
|
|
is_node_match = True
|
|
else:
|
|
is_node_match = True
|
|
|
|
# Check on state
|
|
if state:
|
|
vm_state = zkhandler.read(('domain.state', vm))
|
|
if vm_state == state:
|
|
is_state_match = True
|
|
else:
|
|
is_state_match = True
|
|
|
|
if is_limit_match and is_node_match and is_state_match:
|
|
get_vm_info[vm] = True
|
|
else:
|
|
get_vm_info[vm] = False
|
|
|
|
vm_list = [common.getInformationFromXML(zkhandler, vm) for vm in full_vm_list if get_vm_info[vm]]
|
|
|
|
return True, vm_list
|