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Rework vm library for new zkhandler

This commit is contained in:
Joshua Boniface 2021-05-29 21:17:19 -04:00
parent 3603b782c0
commit b4f2cf879e
1 changed files with 219 additions and 225 deletions
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444
daemon-common/vm.py
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@ -24,7 +24,6 @@ import re
import lxml.objectify import lxml.objectify
import lxml.etree import lxml.etree
import daemon_lib.zkhandler as zkhandler
import daemon_lib.common as common import daemon_lib.common as common
import daemon_lib.ceph as ceph import daemon_lib.ceph as ceph
@ -33,20 +32,20 @@ import daemon_lib.ceph as ceph
# #
# Cluster search functions # Cluster search functions
# #
def getClusterDomainList(zk_conn): def getClusterDomainList(zkhandler):
# Get a list of UUIDs by listing the children of /domains # Get a list of UUIDs by listing the children of /domains
uuid_list = zkhandler.listchildren(zk_conn, '/domains') uuid_list = zkhandler.children('/domains')
name_list = [] name_list = []
# For each UUID, get the corresponding name from the data # For each UUID, get the corresponding name from the data
for uuid in uuid_list: for uuid in uuid_list:
name_list.append(zkhandler.readdata(zk_conn, '/domains/%s' % uuid)) name_list.append(zkhandler.read('/domains/{}'.format(uuid)))
return uuid_list, name_list return uuid_list, name_list
def searchClusterByUUID(zk_conn, uuid): def searchClusterByUUID(zkhandler, uuid):
try: try:
# Get the lists # Get the lists
uuid_list, name_list = getClusterDomainList(zk_conn) uuid_list, name_list = getClusterDomainList(zkhandler)
# We're looking for UUID, so find that element ID # We're looking for UUID, so find that element ID
index = uuid_list.index(uuid) index = uuid_list.index(uuid)
# Get the name_list element at that index # Get the name_list element at that index
@ -58,10 +57,10 @@ def searchClusterByUUID(zk_conn, uuid):
return name return name
def searchClusterByName(zk_conn, name): def searchClusterByName(zkhandler, name):
try: try:
# Get the lists # Get the lists
uuid_list, name_list = getClusterDomainList(zk_conn) uuid_list, name_list = getClusterDomainList(zkhandler)
# We're looking for name, so find that element ID # We're looking for name, so find that element ID
index = name_list.index(name) index = name_list.index(name)
# Get the uuid_list element at that index # Get the uuid_list element at that index
@ -73,67 +72,83 @@ def searchClusterByName(zk_conn, name):
return uuid return uuid
def getDomainUUID(zk_conn, domain): def getDomainUUID(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
if common.validateUUID(domain): if common.validateUUID(domain):
dom_name = searchClusterByUUID(zk_conn, domain) dom_name = searchClusterByUUID(zkhandler, domain)
dom_uuid = searchClusterByName(zk_conn, dom_name) dom_uuid = searchClusterByName(zkhandler, dom_name)
else: else:
dom_uuid = searchClusterByName(zk_conn, domain) dom_uuid = searchClusterByName(zkhandler, domain)
dom_name = searchClusterByUUID(zk_conn, dom_uuid) dom_name = searchClusterByUUID(zkhandler, dom_uuid)
return dom_uuid return dom_uuid
def getDomainName(zk_conn, domain): def getDomainName(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
if common.validateUUID(domain): if common.validateUUID(domain):
dom_name = searchClusterByUUID(zk_conn, domain) dom_name = searchClusterByUUID(zkhandler, domain)
dom_uuid = searchClusterByName(zk_conn, dom_name) dom_uuid = searchClusterByName(zkhandler, dom_name)
else: else:
dom_uuid = searchClusterByName(zk_conn, domain) dom_uuid = searchClusterByName(zkhandler, domain)
dom_name = searchClusterByUUID(zk_conn, dom_uuid) dom_name = searchClusterByUUID(zkhandler, dom_uuid)
return dom_name return dom_name
#
# Helper functions
#
def change_state(zkhandler, dom_uuid, new_state):
lock = zkhandler.exclusivelock('/domains/{}/state'.format(dom_uuid))
with lock:
zkhandler.write([
('/domains/{}/state'.format(dom_uuid), new_state)
])
# Wait for 1/2 second to allow state to flow to all nodes
time.sleep(0.5)
# #
# Direct functions # Direct functions
# #
def is_migrated(zk_conn, domain): def is_migrated(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
last_node = zkhandler.readdata(zk_conn, '/domains/{}/lastnode'.format(dom_uuid)) last_node = zkhandler.read('/domains/{}/lastnode'.format(dom_uuid))
if last_node: if last_node:
return True return True
else: else:
return False return False
def flush_locks(zk_conn, domain): def flush_locks(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Verify that the VM is in a stopped state; freeing locks is not safe otherwise # Verify that the VM is in a stopped state; freeing locks is not safe otherwise
state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if state != 'stop': if state != 'stop':
return False, 'ERROR: VM "{}" is not in stopped state; flushing RBD locks on a running VM is dangerous.'.format(domain) return False, 'ERROR: VM "{}" is not in stopped state; flushing RBD locks on a running VM is dangerous.'.format(domain)
# Tell the cluster to create a new OSD for the host # Tell the cluster to create a new OSD for the host
flush_locks_string = 'flush_locks {}'.format(dom_uuid) flush_locks_string = 'flush_locks {}'.format(dom_uuid)
zkhandler.writedata(zk_conn, {'/cmd/domains': flush_locks_string}) zkhandler.write([
('/cmd/domains', flush_locks_string)
])
# Wait 1/2 second for the cluster to get the message and start working # Wait 1/2 second for the cluster to get the message and start working
time.sleep(0.5) time.sleep(0.5)
# Acquire a read lock, so we get the return exclusively # Acquire a read lock, so we get the return exclusively
lock = zkhandler.readlock(zk_conn, '/cmd/domains') lock = zkhandler.readlock('/cmd/domains')
with lock: with lock:
try: try:
result = zkhandler.readdata(zk_conn, '/cmd/domains').split()[0] result = zkhandler.read('/cmd/domains').split()[0]
if result == 'success-flush_locks': if result == 'success-flush_locks':
message = 'Flushed locks on VM "{}"'.format(domain) message = 'Flushed locks on VM "{}"'.format(domain)
success = True success = True
@ -145,15 +160,17 @@ def flush_locks(zk_conn, domain):
success = False success = False
# Acquire a write lock to ensure things go smoothly # Acquire a write lock to ensure things go smoothly
lock = zkhandler.writelock(zk_conn, '/cmd/domains') lock = zkhandler.writelock('/cmd/domains')
with lock: with lock:
time.sleep(0.5) time.sleep(0.5)
zkhandler.writedata(zk_conn, {'/cmd/domains': ''}) zkhandler.write([
('/cmd/domains', '')
])
return success, message return success, message
def define_vm(zk_conn, config_data, target_node, node_limit, node_selector, node_autostart, migration_method=None, profile=None, initial_state='stop'): def define_vm(zkhandler, config_data, target_node, node_limit, node_selector, node_autostart, migration_method=None, profile=None, initial_state='stop'):
# Parse the XML data # Parse the XML data
try: try:
parsed_xml = lxml.objectify.fromstring(config_data) parsed_xml = lxml.objectify.fromstring(config_data)
@ -163,14 +180,14 @@ def define_vm(zk_conn, config_data, target_node, node_limit, node_selector, node
dom_name = parsed_xml.name.text dom_name = parsed_xml.name.text
# Ensure that the UUID and name are unique # Ensure that the UUID and name are unique
if searchClusterByUUID(zk_conn, dom_uuid) or searchClusterByName(zk_conn, dom_name): if searchClusterByUUID(zkhandler, dom_uuid) or searchClusterByName(zkhandler, dom_name):
return False, 'ERROR: Specified VM "{}" or UUID "{}" matches an existing VM on the cluster'.format(dom_name, dom_uuid) return False, 'ERROR: Specified VM "{}" or UUID "{}" matches an existing VM on the cluster'.format(dom_name, dom_uuid)
if not target_node: if not target_node:
target_node = common.findTargetNode(zk_conn, dom_uuid) target_node = common.findTargetNode(zkhandler, dom_uuid)
else: else:
# Verify node is valid # Verify node is valid
valid_node = common.verifyNode(zk_conn, target_node) valid_node = common.verifyNode(zkhandler, target_node)
if not valid_node: if not valid_node:
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node) return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
@ -194,64 +211,64 @@ def define_vm(zk_conn, config_data, target_node, node_limit, node_selector, node
formatted_rbd_list = '' formatted_rbd_list = ''
# Add the new domain to Zookeeper # Add the new domain to Zookeeper
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}'.format(dom_uuid): dom_name, ('/domains/{}'.format(dom_uuid), dom_name),
'/domains/{}/state'.format(dom_uuid): initial_state, ('/domains/{}/state'.format(dom_uuid), initial_state),
'/domains/{}/node'.format(dom_uuid): target_node, ('/domains/{}/node'.format(dom_uuid), target_node),
'/domains/{}/lastnode'.format(dom_uuid): '', ('/domains/{}/lastnode'.format(dom_uuid), ''),
'/domains/{}/node_limit'.format(dom_uuid): formatted_node_limit, ('/domains/{}/node_limit'.format(dom_uuid), formatted_node_limit),
'/domains/{}/node_selector'.format(dom_uuid): node_selector, ('/domains/{}/node_selector'.format(dom_uuid), node_selector),
'/domains/{}/node_autostart'.format(dom_uuid): node_autostart, ('/domains/{}/node_autostart'.format(dom_uuid), node_autostart),
'/domains/{}/migration_method'.format(dom_uuid): migration_method, ('/domains/{}/migration_method'.format(dom_uuid), migration_method),
'/domains/{}/failedreason'.format(dom_uuid): '', ('/domains/{}/failedreason'.format(dom_uuid), ''),
'/domains/{}/consolelog'.format(dom_uuid): '', ('/domains/{}/consolelog'.format(dom_uuid), ''),
'/domains/{}/rbdlist'.format(dom_uuid): formatted_rbd_list, ('/domains/{}/rbdlist'.format(dom_uuid), formatted_rbd_list),
'/domains/{}/profile'.format(dom_uuid): profile, ('/domains/{}/profile'.format(dom_uuid), profile),
'/domains/{}/vnc'.format(dom_uuid): '', ('/domains/{}/vnc'.format(dom_uuid), ''),
'/domains/{}/xml'.format(dom_uuid): config_data ('/domains/{}/xml'.format(dom_uuid), config_data)
}) ])
return True, 'Added new VM with Name "{}" and UUID "{}" to database.'.format(dom_name, dom_uuid) return True, 'Added new VM with Name "{}" and UUID "{}" to database.'.format(dom_name, dom_uuid)
def modify_vm_metadata(zk_conn, domain, node_limit, node_selector, node_autostart, provisioner_profile, migration_method): def modify_vm_metadata(zkhandler, domain, node_limit, node_selector, node_autostart, provisioner_profile, migration_method):
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
if node_limit is not None: if node_limit is not None:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/node_limit'.format(dom_uuid): node_limit ('/domains/{}/node_limit'.format(dom_uuid), node_limit)
}) ])
if node_selector is not None: if node_selector is not None:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/node_selector'.format(dom_uuid): node_selector ('/domains/{}/node_selector'.format(dom_uuid), node_selector)
}) ])
if node_autostart is not None: if node_autostart is not None:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/node_autostart'.format(dom_uuid): node_autostart ('/domains/{}/node_autostart'.format(dom_uuid), node_autostart)
}) ])
if provisioner_profile is not None: if provisioner_profile is not None:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/profile'.format(dom_uuid): provisioner_profile ('/domains/{}/profile'.format(dom_uuid), provisioner_profile)
}) ])
if migration_method is not None: if migration_method is not None:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/migration_method'.format(dom_uuid): migration_method ('/domains/{}/migration_method'.format(dom_uuid), migration_method)
}) ])
return True, 'Successfully modified PVC metadata of VM "{}".'.format(domain) return True, 'Successfully modified PVC metadata of VM "{}".'.format(domain)
def modify_vm(zk_conn, domain, restart, new_vm_config): def modify_vm(zkhandler, domain, restart, new_vm_config):
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
dom_name = getDomainName(zk_conn, domain) dom_name = getDomainName(zkhandler, domain)
# Parse and valiate the XML # Parse and valiate the XML
try: try:
@ -273,45 +290,41 @@ def modify_vm(zk_conn, domain, restart, new_vm_config):
formatted_rbd_list = '' formatted_rbd_list = ''
# Add the modified config to Zookeeper # Add the modified config to Zookeeper
zk_data = { zkhandler.write([
'/domains/{}'.format(dom_uuid): dom_name, ('/domains/{}'.format(dom_uuid), dom_name),
'/domains/{}/rbdlist'.format(dom_uuid): formatted_rbd_list, ('/domains/{}/rbdlist'.format(dom_uuid), formatted_rbd_list),
'/domains/{}/xml'.format(dom_uuid): new_vm_config ('/domains/{}/xml'.format(dom_uuid), new_vm_config)
} ])
zkhandler.writedata(zk_conn, zk_data)
if restart: if restart:
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) change_state(zkhandler, dom_uuid, 'restart')
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'restart'})
lock.release()
return True, 'Successfully modified configuration of VM "{}".'.format(domain) return True, 'Successfully modified configuration of VM "{}".'.format(domain)
def dump_vm(zk_conn, domain): def dump_vm(zkhandler, domain):
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Gram the domain XML and dump it to stdout # Gram the domain XML and dump it to stdout
vm_xml = zkhandler.readdata(zk_conn, '/domains/{}/xml'.format(dom_uuid)) vm_xml = zkhandler.read('/domains/{}/xml'.format(dom_uuid))
return True, vm_xml return True, vm_xml
def rename_vm(zk_conn, domain, new_domain): def rename_vm(zkhandler, domain, new_domain):
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Verify that the VM is in a stopped state; renaming is not supported otherwise # Verify that the VM is in a stopped state; renaming is not supported otherwise
state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if state != 'stop': if state != 'stop':
return False, 'ERROR: VM "{}" is not in stopped state; VMs cannot be renamed while running.'.format(domain) return False, 'ERROR: VM "{}" is not in stopped state; VMs cannot be renamed while running.'.format(domain)
# Parse and valiate the XML # Parse and valiate the XML
vm_config = common.getDomainXML(zk_conn, dom_uuid) vm_config = common.getDomainXML(zkhandler, dom_uuid)
# Obtain the RBD disk list using the common functions # Obtain the RBD disk list using the common functions
ddisks = common.getDomainDisks(vm_config, {}) ddisks = common.getDomainDisks(vm_config, {})
@ -328,207 +341,180 @@ def rename_vm(zk_conn, domain, new_domain):
# Skip renaming if nothing changed # Skip renaming if nothing changed
if rbd_new == rbd: if rbd_new == rbd:
continue continue
ceph.rename_volume(zk_conn, pool_list[idx], rbd, rbd_new) ceph.rename_volume(zkhandler, pool_list[idx], rbd, rbd_new)
# Replace the name in the config # Replace the name in the config
vm_config_new = lxml.etree.tostring(vm_config, encoding='ascii', method='xml').decode().replace(domain, new_domain) vm_config_new = lxml.etree.tostring(vm_config, encoding='ascii', method='xml').decode().replace(domain, new_domain)
# Get VM information # Get VM information
_b, dom_info = get_info(zk_conn, dom_uuid) _b, dom_info = get_info(zkhandler, dom_uuid)
# Undefine the old VM # Undefine the old VM
undefine_vm(zk_conn, dom_uuid) undefine_vm(zkhandler, dom_uuid)
# Define the new VM # Define the new VM
define_vm(zk_conn, 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') 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')
# If the VM is migrated, store that # If the VM is migrated, store that
if dom_info['migrated'] != 'no': if dom_info['migrated'] != 'no':
zkhandler.writedata(zk_conn, {'/domains/{}/lastnode'.format(dom_uuid): dom_info['last_node']}) zkhandler.write([
('/domains/{}/lastnode'.format(dom_uuid), dom_info['last_node'])
])
return True, 'Successfully renamed VM "{}" to "{}".'.format(domain, new_domain) return True, 'Successfully renamed VM "{}" to "{}".'.format(domain, new_domain)
def undefine_vm(zk_conn, domain): def undefine_vm(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Shut down the VM # Shut down the VM
current_vm_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_vm_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_vm_state != 'stop': if current_vm_state != 'stop':
# Set the domain into stop mode change_state(zkhandler, dom_uuid, 'stop')
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid))
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'stop'})
lock.release()
# Wait for 2 seconds to allow state to flow to all nodes
time.sleep(2)
# Gracefully terminate the class instances # Gracefully terminate the class instances
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'delete'}) change_state(zkhandler, dom_uuid, 'delete')
time.sleep(2)
# Delete the configurations # Delete the configurations
zkhandler.deletekey(zk_conn, '/domains/{}'.format(dom_uuid)) zkhandler.delete('/domains/{}'.format(dom_uuid))
return True, 'Undefined VM "{}" from the cluster.'.format(domain) return True, 'Undefined VM "{}" from the cluster.'.format(domain)
def remove_vm(zk_conn, domain): def remove_vm(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
disk_list = common.getDomainDiskList(zk_conn, dom_uuid) disk_list = common.getDomainDiskList(zkhandler, dom_uuid)
# Shut down the VM # Shut down the VM
current_vm_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_vm_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_vm_state != 'stop': if current_vm_state != 'stop':
# Set the domain into stop mode change_state(zkhandler, dom_uuid, 'stop')
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid))
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'stop'})
lock.release()
# Wait for 2 seconds to allow state to flow to all nodes
time.sleep(2)
# Gracefully terminate the class instances # Gracefully terminate the class instances
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'delete'}) change_state(zkhandler, dom_uuid, 'delete')
time.sleep(2)
# Delete the configurations # Delete the configurations
zkhandler.deletekey(zk_conn, '/domains/{}'.format(dom_uuid)) zkhandler.delete('/domains/{}'.format(dom_uuid))
time.sleep(2)
# Wait for 1 second to allow state to flow to all nodes
time.sleep(1)
# Remove disks # Remove disks
for disk in disk_list: for disk in disk_list:
# vmpool/vmname_volume # vmpool/vmname_volume
try: try:
disk_pool, disk_name = disk.split('/') disk_pool, disk_name = disk.split('/')
retcode, message = ceph.remove_volume(zk_conn, disk_pool, disk_name) retcode, message = ceph.remove_volume(zkhandler, disk_pool, disk_name)
except ValueError: except ValueError:
continue continue
return True, 'Removed VM "{}" and disks from the cluster.'.format(domain) return True, 'Removed VM "{}" and disks from the cluster.'.format(domain)
def start_vm(zk_conn, domain): def start_vm(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Set the VM to start # Set the VM to start
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) change_state(zkhandler, dom_uuid, 'start')
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'start'})
lock.release()
return True, 'Starting VM "{}".'.format(domain) return True, 'Starting VM "{}".'.format(domain)
def restart_vm(zk_conn, domain, wait=False): def restart_vm(zkhandler, domain, wait=False):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get state and verify we're OK to proceed # Get state and verify we're OK to proceed
current_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_state != 'start': if current_state != 'start':
return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain) return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain)
retmsg = 'Restarting VM "{}".'.format(domain) retmsg = 'Restarting VM "{}".'.format(domain)
# Set the VM to restart # Set the VM to restart
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) change_state(zkhandler, dom_uuid, 'restart')
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'restart'})
lock.release()
if wait: if wait:
while zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) == 'restart': while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == 'restart':
time.sleep(1) time.sleep(1)
retmsg = 'Restarted VM "{}"'.format(domain) retmsg = 'Restarted VM "{}"'.format(domain)
return True, retmsg return True, retmsg
def shutdown_vm(zk_conn, domain, wait=False): def shutdown_vm(zkhandler, domain, wait=False):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get state and verify we're OK to proceed # Get state and verify we're OK to proceed
current_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_state != 'start': if current_state != 'start':
return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain) return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain)
retmsg = 'Shutting down VM "{}"'.format(domain) retmsg = 'Shutting down VM "{}"'.format(domain)
# Set the VM to shutdown # Set the VM to shutdown
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) change_state(zkhandler, dom_uuid, 'shutdown')
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'shutdown'})
lock.release()
if wait: if wait:
while zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) == 'shutdown': while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == 'shutdown':
time.sleep(1) time.sleep(1)
retmsg = 'Shut down VM "{}"'.format(domain) retmsg = 'Shut down VM "{}"'.format(domain)
return True, retmsg return True, retmsg
def stop_vm(zk_conn, domain): def stop_vm(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Set the VM to start # Set the VM to stop
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) change_state(zkhandler, dom_uuid, 'stop')
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'stop'})
lock.release()
return True, 'Forcibly stopping VM "{}".'.format(domain) return True, 'Forcibly stopping VM "{}".'.format(domain)
def disable_vm(zk_conn, domain): def disable_vm(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get state and verify we're OK to proceed # Get state and verify we're OK to proceed
current_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_state != 'stop': if current_state != 'stop':
return False, 'ERROR: VM "{}" must be stopped before disabling!'.format(domain) return False, 'ERROR: VM "{}" must be stopped before disabling!'.format(domain)
# Set the VM to start # Set the VM to disable
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) change_state(zkhandler, dom_uuid, 'disable')
lock.acquire()
zkhandler.writedata(zk_conn, {'/domains/{}/state'.format(dom_uuid): 'disable'})
lock.release()
return True, 'Marked VM "{}" as disable.'.format(domain) return True, 'Marked VM "{}" as disable.'.format(domain)
def move_vm(zk_conn, domain, target_node, wait=False, force_live=False): def move_vm(zkhandler, domain, target_node, wait=False, force_live=False):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get state and verify we're OK to proceed # Get state and verify we're OK to proceed
current_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_state != 'start': if current_state != 'start':
# If the current state isn't start, preserve it; we're not doing live migration # If the current state isn't start, preserve it; we're not doing live migration
target_state = current_state target_state = current_state
@ -538,26 +524,28 @@ def move_vm(zk_conn, domain, target_node, wait=False, force_live=False):
else: else:
target_state = 'migrate' target_state = 'migrate'
current_node = zkhandler.readdata(zk_conn, '/domains/{}/node'.format(dom_uuid)) current_node = zkhandler.read('/domains/{}/node'.format(dom_uuid))
if not target_node: if not target_node:
target_node = common.findTargetNode(zk_conn, dom_uuid) target_node = common.findTargetNode(zkhandler, dom_uuid)
else: else:
# Verify node is valid # Verify node is valid
valid_node = common.verifyNode(zk_conn, target_node) valid_node = common.verifyNode(zkhandler, target_node)
if not valid_node: if not valid_node:
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node) return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
# Check if node is within the limit # Check if node is within the limit
node_limit = zkhandler.readdata(zk_conn, '/domains/{}/node_limit'.format(dom_uuid)) node_limit = zkhandler.read('/domains/{}/node_limit'.format(dom_uuid))
if node_limit and target_node not in node_limit.split(','): 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) 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 # Verify if node is current node
if target_node == current_node: if target_node == current_node:
last_node = zkhandler.readdata(zk_conn, '/domains/{}/lastnode'.format(dom_uuid)) last_node = zkhandler.read('/domains/{}/lastnode'.format(dom_uuid))
if last_node: if last_node:
zkhandler.writedata(zk_conn, {'/domains/{}/lastnode'.format(dom_uuid): ''}) zkhandler.write([
('/domains/{}/lastnode'.format(dom_uuid), '')
])
return True, 'Making temporary migration permanent for VM "{}".'.format(domain) return True, 'Making temporary migration permanent for VM "{}".'.format(domain)
return False, 'ERROR: VM "{}" is already running on node "{}".'.format(domain, current_node) return False, 'ERROR: VM "{}" is already running on node "{}".'.format(domain, current_node)
@ -567,31 +555,33 @@ def move_vm(zk_conn, domain, target_node, wait=False, force_live=False):
retmsg = 'Permanently migrating VM "{}" to node "{}".'.format(domain, target_node) retmsg = 'Permanently migrating VM "{}" to node "{}".'.format(domain, target_node)
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) lock = zkhandler.exclusivelock('/domains/{}/state'.format(dom_uuid))
lock.acquire() with lock:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/state'.format(dom_uuid): target_state, ('/domains/{}/state'.format(dom_uuid), target_state),
'/domains/{}/node'.format(dom_uuid): target_node, ('/domains/{}/node'.format(dom_uuid), target_node),
'/domains/{}/lastnode'.format(dom_uuid): '' ('/domains/{}/lastnode'.format(dom_uuid), '')
}) ])
lock.release()
# Wait for 1/2 second for migration to start
time.sleep(0.5)
if wait: if wait:
while zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) == target_state: while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == target_state:
time.sleep(1) time.sleep(1)
retmsg = 'Permanently migrated VM "{}" to node "{}"'.format(domain, target_node) retmsg = 'Permanently migrated VM "{}" to node "{}"'.format(domain, target_node)
return True, retmsg return True, retmsg
def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False, force_live=False): def migrate_vm(zkhandler, domain, target_node, force_migrate, wait=False, force_live=False):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get state and verify we're OK to proceed # Get state and verify we're OK to proceed
current_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_state != 'start': if current_state != 'start':
# If the current state isn't start, preserve it; we're not doing live migration # If the current state isn't start, preserve it; we're not doing live migration
target_state = current_state target_state = current_state
@ -601,22 +591,22 @@ def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False, force_li
else: else:
target_state = 'migrate' target_state = 'migrate'
current_node = zkhandler.readdata(zk_conn, '/domains/{}/node'.format(dom_uuid)) current_node = zkhandler.read('/domains/{}/node'.format(dom_uuid))
last_node = zkhandler.readdata(zk_conn, '/domains/{}/lastnode'.format(dom_uuid)) last_node = zkhandler.read('/domains/{}/lastnode'.format(dom_uuid))
if last_node and not force_migrate: if last_node and not force_migrate:
return False, 'ERROR: VM "{}" has been previously migrated.'.format(domain) return False, 'ERROR: VM "{}" has been previously migrated.'.format(domain)
if not target_node: if not target_node:
target_node = common.findTargetNode(zk_conn, dom_uuid) target_node = common.findTargetNode(zkhandler, dom_uuid)
else: else:
# Verify node is valid # Verify node is valid
valid_node = common.verifyNode(zk_conn, target_node) valid_node = common.verifyNode(zkhandler, target_node)
if not valid_node: if not valid_node:
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node) return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
# Check if node is within the limit # Check if node is within the limit
node_limit = zkhandler.readdata(zk_conn, '/domains/{}/node_limit'.format(dom_uuid)) node_limit = zkhandler.read('/domains/{}/node_limit'.format(dom_uuid))
if node_limit and target_node not in node_limit.split(','): 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) return False, 'ERROR: Specified node "{}" is not in the allowed list of nodes for VM "{}".'.format(target_node, domain)
@ -633,31 +623,33 @@ def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False, force_li
retmsg = 'Migrating VM "{}" to node "{}".'.format(domain, target_node) retmsg = 'Migrating VM "{}" to node "{}".'.format(domain, target_node)
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) lock = zkhandler.exclusivelock(zkhandler, '/domains/{}/state'.format(dom_uuid))
lock.acquire() with lock:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/state'.format(dom_uuid): target_state, ('/domains/{}/state'.format(dom_uuid), target_state),
'/domains/{}/node'.format(dom_uuid): target_node, ('/domains/{}/node'.format(dom_uuid), target_node),
'/domains/{}/lastnode'.format(dom_uuid): current_node ('/domains/{}/lastnode'.format(dom_uuid), current_node)
}) ])
lock.release()
# Wait for 1/2 second for migration to start
time.sleep(0.5)
if wait: if wait:
while zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) == target_state: while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == target_state:
time.sleep(1) time.sleep(1)
retmsg = 'Migrated VM "{}" to node "{}"'.format(domain, target_node) retmsg = 'Migrated VM "{}" to node "{}"'.format(domain, target_node)
return True, retmsg return True, retmsg
def unmigrate_vm(zk_conn, domain, wait=False, force_live=False): def unmigrate_vm(zkhandler, domain, wait=False, force_live=False):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get state and verify we're OK to proceed # Get state and verify we're OK to proceed
current_state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) current_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
if current_state != 'start': if current_state != 'start':
# If the current state isn't start, preserve it; we're not doing live migration # If the current state isn't start, preserve it; we're not doing live migration
target_state = current_state target_state = current_state
@ -667,38 +659,40 @@ def unmigrate_vm(zk_conn, domain, wait=False, force_live=False):
else: else:
target_state = 'migrate' target_state = 'migrate'
target_node = zkhandler.readdata(zk_conn, '/domains/{}/lastnode'.format(dom_uuid)) target_node = zkhandler.read('/domains/{}/lastnode'.format(dom_uuid))
if target_node == '': if target_node == '':
return False, 'ERROR: VM "{}" has not been previously migrated.'.format(domain) return False, 'ERROR: VM "{}" has not been previously migrated.'.format(domain)
retmsg = 'Unmigrating VM "{}" back to node "{}".'.format(domain, target_node) retmsg = 'Unmigrating VM "{}" back to node "{}".'.format(domain, target_node)
lock = zkhandler.exclusivelock(zk_conn, '/domains/{}/state'.format(dom_uuid)) lock = zkhandler.exclusivelock(zkhandler, '/domains/{}/state'.format(dom_uuid))
lock.acquire() with lock:
zkhandler.writedata(zk_conn, { zkhandler.write([
'/domains/{}/state'.format(dom_uuid): target_state, ('/domains/{}/state'.format(dom_uuid), target_state),
'/domains/{}/node'.format(dom_uuid): target_node, ('/domains/{}/node'.format(dom_uuid), target_node),
'/domains/{}/lastnode'.format(dom_uuid): '' ('/domains/{}/lastnode'.format(dom_uuid), '')
}) ])
lock.release()
# Wait for 1/2 second for migration to start
time.sleep(0.5)
if wait: if wait:
while zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid)) == target_state: while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == target_state:
time.sleep(1) time.sleep(1)
retmsg = 'Unmigrated VM "{}" back to node "{}"'.format(domain, target_node) retmsg = 'Unmigrated VM "{}" back to node "{}"'.format(domain, target_node)
return True, retmsg return True, retmsg
def get_console_log(zk_conn, domain, lines=1000): def get_console_log(zkhandler, domain, lines=1000):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain) return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get the data from ZK # Get the data from ZK
console_log = zkhandler.readdata(zk_conn, '/domains/{}/consolelog'.format(dom_uuid)) console_log = zkhandler.read('/domains/{}/consolelog'.format(dom_uuid))
# Shrink the log buffer to length lines # Shrink the log buffer to length lines
shrunk_log = console_log.split('\n')[-lines:] shrunk_log = console_log.split('\n')[-lines:]
@ -707,24 +701,24 @@ def get_console_log(zk_conn, domain, lines=1000):
return True, loglines return True, loglines
def get_info(zk_conn, domain): def get_info(zkhandler, domain):
# Validate that VM exists in cluster # Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain) dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid: if not dom_uuid:
return False, 'ERROR: No VM named "{}" is present in the cluster.'.format(domain) return False, 'ERROR: No VM named "{}" is present in the cluster.'.format(domain)
# Gather information from XML config and print it # Gather information from XML config and print it
domain_information = common.getInformationFromXML(zk_conn, dom_uuid) domain_information = common.getInformationFromXML(zkhandler, dom_uuid)
if not domain_information: if not domain_information:
return False, 'ERROR: Could not get information about VM "{}".'.format(domain) return False, 'ERROR: Could not get information about VM "{}".'.format(domain)
return True, domain_information return True, domain_information
def get_list(zk_conn, node, state, limit, is_fuzzy=True): def get_list(zkhandler, node, state, limit, is_fuzzy=True):
if node: if node:
# Verify node is valid # Verify node is valid
if not common.verifyNode(zk_conn, node): if not common.verifyNode(zkhandler, node):
return False, 'Specified node "{}" is invalid.'.format(node) return False, 'Specified node "{}" is invalid.'.format(node)
if state: if state:
@ -732,7 +726,7 @@ def get_list(zk_conn, node, state, limit, is_fuzzy=True):
if state not in valid_states: if state not in valid_states:
return False, 'VM state "{}" is not valid.'.format(state) return False, 'VM state "{}" is not valid.'.format(state)
full_vm_list = zkhandler.listchildren(zk_conn, '/domains') full_vm_list = zkhandler.children('/domains')
vm_list = [] vm_list = []
# Set our limit to a sensible regex # Set our limit to a sensible regex
@ -751,33 +745,33 @@ def get_list(zk_conn, node, state, limit, is_fuzzy=True):
vm_state = {} vm_state = {}
for vm in full_vm_list: for vm in full_vm_list:
# Check we don't match the limit # Check we don't match the limit
name = zkhandler.readdata(zk_conn, '/domains/{}'.format(vm)) name = zkhandler.read('/domains/{}'.format(vm))
vm_node[vm] = zkhandler.readdata(zk_conn, '/domains/{}/node'.format(vm)) vm_node[vm] = zkhandler.read('/domains/{}/node'.format(vm))
vm_state[vm] = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(vm)) vm_state[vm] = zkhandler.read('/domains/{}/state'.format(vm))
# Handle limiting # Handle limiting
if limit: if limit:
try: try:
if re.match(limit, vm): if re.match(limit, vm):
if not node and not state: if not node and not state:
vm_list.append(common.getInformationFromXML(zk_conn, vm)) vm_list.append(common.getInformationFromXML(zkhandler, vm))
else: else:
if vm_node[vm] == node or vm_state[vm] == state: if vm_node[vm] == node or vm_state[vm] == state:
vm_list.append(common.getInformationFromXML(zk_conn, vm)) vm_list.append(common.getInformationFromXML(zkhandler, vm))
if re.match(limit, name): if re.match(limit, name):
if not node and not state: if not node and not state:
vm_list.append(common.getInformationFromXML(zk_conn, vm)) vm_list.append(common.getInformationFromXML(zkhandler, vm))
else: else:
if vm_node[vm] == node or vm_state[vm] == state: if vm_node[vm] == node or vm_state[vm] == state:
vm_list.append(common.getInformationFromXML(zk_conn, vm)) vm_list.append(common.getInformationFromXML(zkhandler, vm))
except Exception as e: except Exception as e:
return False, 'Regex Error: {}'.format(e) return False, 'Regex Error: {}'.format(e)
else: else:
# Check node to avoid unneeded ZK calls # Check node to avoid unneeded ZK calls
if not node and not state: if not node and not state:
vm_list.append(common.getInformationFromXML(zk_conn, vm)) vm_list.append(common.getInformationFromXML(zkhandler, vm))
else: else:
if vm_node[vm] == node or vm_state[vm] == state: if vm_node[vm] == node or vm_state[vm] == state:
vm_list.append(common.getInformationFromXML(zk_conn, vm)) vm_list.append(common.getInformationFromXML(zkhandler, vm))
return True, vm_list return True, vm_list