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Convert vm.py to new ZK schema handler

This commit is contained in:
Joshua Boniface 2021-06-13 13:41:21 -04:00
parent f6e37906a9
commit 059230d369
1 changed files with 94 additions and 91 deletions
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185
daemon-common/vm.py
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@ -34,11 +34,11 @@ import daemon_lib.ceph as ceph
#
def getClusterDomainList(zkhandler):
# Get a list of UUIDs by listing the children of /domains
uuid_list = zkhandler.children('/domains')
uuid_list = zkhandler.children('base.domain')
name_list = []
# For each UUID, get the corresponding name from the data
for uuid in uuid_list:
name_list.append(zkhandler.read('/domains/{}'.format(uuid)))
name_list.append(zkhandler.read(('domain', uuid)))
return uuid_list, name_list
@ -100,10 +100,10 @@ def getDomainName(zkhandler, domain):
# Helper functions
#
def change_state(zkhandler, dom_uuid, new_state):
lock = zkhandler.exclusivelock('/domains/{}/state'.format(dom_uuid))
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
with lock:
zkhandler.write([
('/domains/{}/state'.format(dom_uuid), new_state)
(('domain.state', dom_uuid), new_state)
])
# Wait for 1/2 second to allow state to flow to all nodes
@ -119,7 +119,7 @@ def is_migrated(zkhandler, domain):
if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
last_node = zkhandler.read('/domains/{}/lastnode'.format(dom_uuid))
last_node = zkhandler.read(('domain.last_node', dom_uuid))
if last_node:
return True
else:
@ -133,22 +133,22 @@ def flush_locks(zkhandler, 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
state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
state = zkhandler.read(('domain.state', dom_uuid))
if state != 'stop':
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
flush_locks_string = 'flush_locks {}'.format(dom_uuid)
zkhandler.write([
('/cmd/domains', flush_locks_string)
('base.cmd.domain', flush_locks_string)
])
# Wait 1/2 second for the cluster to get the message and start working
time.sleep(0.5)
# Acquire a read lock, so we get the return exclusively
lock = zkhandler.readlock('/cmd/domains')
lock = zkhandler.readlock('base.cmd.domain')
with lock:
try:
result = zkhandler.read('/cmd/domains').split()[0]
result = zkhandler.read('base.cmd.domain').split()[0]
if result == 'success-flush_locks':
message = 'Flushed locks on VM "{}"'.format(domain)
success = True
@ -160,11 +160,11 @@ def flush_locks(zkhandler, domain):
success = False
# Acquire a write lock to ensure things go smoothly
lock = zkhandler.writelock('/cmd/domains')
lock = zkhandler.writelock('base.cmd.domain')
with lock:
time.sleep(0.5)
zkhandler.write([
('/cmd/domains', '')
('base.cmd.domain', '')
])
return success, message
@ -212,20 +212,22 @@ def define_vm(zkhandler, config_data, target_node, node_limit, node_selector, no
# Add the new domain to Zookeeper
zkhandler.write([
('/domains/{}'.format(dom_uuid), dom_name),
('/domains/{}/state'.format(dom_uuid), initial_state),
('/domains/{}/node'.format(dom_uuid), target_node),
('/domains/{}/lastnode'.format(dom_uuid), ''),
('/domains/{}/node_limit'.format(dom_uuid), formatted_node_limit),
('/domains/{}/node_selector'.format(dom_uuid), node_selector),
('/domains/{}/node_autostart'.format(dom_uuid), node_autostart),
('/domains/{}/migration_method'.format(dom_uuid), migration_method),
('/domains/{}/failedreason'.format(dom_uuid), ''),
('/domains/{}/consolelog'.format(dom_uuid), ''),
('/domains/{}/rbdlist'.format(dom_uuid), formatted_rbd_list),
('/domains/{}/profile'.format(dom_uuid), profile),
('/domains/{}/vnc'.format(dom_uuid), ''),
('/domains/{}/xml'.format(dom_uuid), config_data)
(('domain', dom_uuid), dom_name),
(('domain.xml', dom_uuid), config_data),
(('domain.state', dom_uuid), initial_state),
(('domain.profile', dom_uuid), profile),
(('domain.stats', dom_uuid), ''),
(('domain.node', dom_uuid), target_node),
(('domain.last_node', dom_uuid), ''),
(('domain.failed_reason', dom_uuid), ''),
(('domain.storage.volumes', dom_uuid), formatted_rbd_list),
(('domain.console.log', dom_uuid), ''),
(('domain.console.vnc', dom_uuid), ''),
(('domain.meta.autostart', dom_uuid), node_autostart),
(('domain.meta.migrate_method', dom_uuid), migration_method),
(('domain.meta.node_limit', dom_uuid), formatted_node_limit),
(('domain.meta.node_selector', dom_uuid), node_selector),
(('domain.migrate.sync-lock', dom_uuid), ''),
])
return True, 'Added new VM with Name "{}" and UUID "{}" to database.'.format(dom_name, dom_uuid)
@ -236,30 +238,27 @@ def modify_vm_metadata(zkhandler, domain, node_limit, node_selector, node_autost
if not dom_uuid:
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
update_list = list()
if node_limit is not None:
zkhandler.write([
('/domains/{}/node_limit'.format(dom_uuid), node_limit)
])
update_list.append((('domain.meta.node_limit', dom_uuid), node_limit))
if node_selector is not None:
zkhandler.write([
('/domains/{}/node_selector'.format(dom_uuid), node_selector)
])
update_list.append((('domain.meta.node_selector', dom_uuid), node_selector))
if node_autostart is not None:
zkhandler.write([
('/domains/{}/node_autostart'.format(dom_uuid), node_autostart)
])
update_list.append((('domain.meta.autostart', dom_uuid), node_autostart))
if provisioner_profile is not None:
zkhandler.write([
('/domains/{}/profile'.format(dom_uuid), provisioner_profile)
])
update_list.append((('domain.profile', dom_uuid), provisioner_profile))
if migration_method is not None:
zkhandler.write([
('/domains/{}/migration_method'.format(dom_uuid), migration_method)
])
update_list.append((('domain.meta.migrate_method', dom_uuid), migration_method))
if len(update_list) < 1:
return False, 'ERROR: No updates to apply.'
zkhandler.write(update_list)
return True, 'Successfully modified PVC metadata of VM "{}".'.format(domain)
@ -291,9 +290,9 @@ def modify_vm(zkhandler, domain, restart, new_vm_config):
# Add the modified config to Zookeeper
zkhandler.write([
('/domains/{}'.format(dom_uuid), dom_name),
('/domains/{}/rbdlist'.format(dom_uuid), formatted_rbd_list),
('/domains/{}/xml'.format(dom_uuid), new_vm_config)
(('domain', dom_uuid), dom_name),
(('domain.storage.volumes', dom_uuid), formatted_rbd_list),
(('domain.xml', dom_uuid), new_vm_config),
])
if restart:
@ -308,7 +307,7 @@ def dump_vm(zkhandler, domain):
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Gram the domain XML and dump it to stdout
vm_xml = zkhandler.read('/domains/{}/xml'.format(dom_uuid))
vm_xml = zkhandler.read(('domain.xml', dom_uuid))
return True, vm_xml
@ -319,7 +318,7 @@ def rename_vm(zkhandler, domain, new_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
state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
state = zkhandler.read(('domain.state', dom_uuid))
if state != 'stop':
return False, 'ERROR: VM "{}" is not in stopped state; VMs cannot be renamed while running.'.format(domain)
@ -358,7 +357,7 @@ def rename_vm(zkhandler, domain, new_domain):
# If the VM is migrated, store that
if dom_info['migrated'] != 'no':
zkhandler.write([
('/domains/{}/lastnode'.format(dom_uuid), dom_info['last_node'])
(('domain.last_node', dom_uuid), dom_info['last_node'])
])
return True, 'Successfully renamed VM "{}" to "{}".'.format(domain, new_domain)
@ -371,7 +370,7 @@ def undefine_vm(zkhandler, domain):
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Shut down the VM
current_vm_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
current_vm_state = zkhandler.read(('domain.state', dom_uuid))
if current_vm_state != 'stop':
change_state(zkhandler, dom_uuid, 'stop')
@ -379,7 +378,9 @@ def undefine_vm(zkhandler, domain):
change_state(zkhandler, dom_uuid, 'delete')
# Delete the configurations
zkhandler.delete('/domains/{}'.format(dom_uuid))
zkhandler.delete([
('domain', dom_uuid)
])
return True, 'Undefined VM "{}" from the cluster.'.format(domain)
@ -393,7 +394,7 @@ def remove_vm(zkhandler, domain):
disk_list = common.getDomainDiskList(zkhandler, dom_uuid)
# Shut down the VM
current_vm_state = zkhandler.read('/domains/{}/state'.format(dom_uuid))
current_vm_state = zkhandler.read(('domain.state', dom_uuid))
if current_vm_state != 'stop':
change_state(zkhandler, dom_uuid, 'stop')
@ -401,7 +402,9 @@ def remove_vm(zkhandler, domain):
change_state(zkhandler, dom_uuid, 'delete')
# Delete the configurations
zkhandler.delete('/domains/{}'.format(dom_uuid))
zkhandler.delete([
('domain', dom_uuid)
])
# Wait for 1 second to allow state to flow to all nodes
time.sleep(1)
@ -437,7 +440,7 @@ def restart_vm(zkhandler, domain, wait=False):
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('/domains/{}/state'.format(dom_uuid))
current_state = zkhandler.read(('domain.state', dom_uuid))
if current_state != 'start':
return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain)
@ -447,8 +450,8 @@ def restart_vm(zkhandler, domain, wait=False):
change_state(zkhandler, dom_uuid, 'restart')
if wait:
while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == 'restart':
time.sleep(1)
while zkhandler.read(('domain.state', dom_uuid)) == 'restart':
time.sleep(0.5)
retmsg = 'Restarted VM "{}"'.format(domain)
return True, retmsg
@ -461,7 +464,7 @@ def shutdown_vm(zkhandler, domain, wait=False):
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('/domains/{}/state'.format(dom_uuid))
current_state = zkhandler.read(('domain.state', dom_uuid))
if current_state != 'start':
return False, 'ERROR: VM "{}" is not in "start" state!'.format(domain)
@ -471,8 +474,8 @@ def shutdown_vm(zkhandler, domain, wait=False):
change_state(zkhandler, dom_uuid, 'shutdown')
if wait:
while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == 'shutdown':
time.sleep(1)
while zkhandler.read(('domain.state', dom_uuid)) == 'shutdown':
time.sleep(0.5)
retmsg = 'Shut down VM "{}"'.format(domain)
return True, retmsg
@ -497,7 +500,7 @@ def disable_vm(zkhandler, domain):
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('/domains/{}/state'.format(dom_uuid))
current_state = zkhandler.read(('domain.state', dom_uuid))
if current_state != 'stop':
return False, 'ERROR: VM "{}" must be stopped before disabling!'.format(domain)
@ -514,7 +517,7 @@ def move_vm(zkhandler, domain, target_node, wait=False, force_live=False):
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('/domains/{}/state'.format(dom_uuid))
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
@ -524,7 +527,7 @@ def move_vm(zkhandler, domain, target_node, wait=False, force_live=False):
else:
target_state = 'migrate'
current_node = zkhandler.read('/domains/{}/node'.format(dom_uuid))
current_node = zkhandler.read(('domain.node', dom_uuid))
if not target_node:
target_node = common.findTargetNode(zkhandler, dom_uuid)
@ -535,16 +538,16 @@ def move_vm(zkhandler, domain, target_node, wait=False, force_live=False):
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
# Check if node is within the limit
node_limit = zkhandler.read('/domains/{}/node_limit'.format(dom_uuid))
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('/domains/{}/lastnode'.format(dom_uuid))
last_node = zkhandler.read(('domain.last_node', dom_uuid))
if last_node:
zkhandler.write([
('/domains/{}/lastnode'.format(dom_uuid), '')
(('domain.last_node', dom_uuid), '')
])
return True, 'Making temporary migration permanent for VM "{}".'.format(domain)
@ -555,20 +558,20 @@ def move_vm(zkhandler, domain, target_node, wait=False, force_live=False):
retmsg = 'Permanently migrating VM "{}" to node "{}".'.format(domain, target_node)
lock = zkhandler.exclusivelock('/domains/{}/state'.format(dom_uuid))
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
with lock:
zkhandler.write([
('/domains/{}/state'.format(dom_uuid), target_state),
('/domains/{}/node'.format(dom_uuid), target_node),
('/domains/{}/lastnode'.format(dom_uuid), '')
(('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)
if wait:
while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == target_state:
time.sleep(1)
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
@ -581,7 +584,7 @@ def migrate_vm(zkhandler, domain, target_node, force_migrate, wait=False, force_
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('/domains/{}/state'.format(dom_uuid))
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
@ -591,8 +594,8 @@ def migrate_vm(zkhandler, domain, target_node, force_migrate, wait=False, force_
else:
target_state = 'migrate'
current_node = zkhandler.read('/domains/{}/node'.format(dom_uuid))
last_node = zkhandler.read('/domains/{}/lastnode'.format(dom_uuid))
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)
@ -606,7 +609,7 @@ def migrate_vm(zkhandler, domain, target_node, force_migrate, wait=False, force_
return False, 'ERROR: Specified node "{}" is invalid.'.format(target_node)
# Check if node is within the limit
node_limit = zkhandler.read('/domains/{}/node_limit'.format(dom_uuid))
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)
@ -623,20 +626,20 @@ def migrate_vm(zkhandler, domain, target_node, force_migrate, wait=False, force_
retmsg = 'Migrating VM "{}" to node "{}".'.format(domain, target_node)
lock = zkhandler.exclusivelock('/domains/{}/state'.format(dom_uuid))
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
with lock:
zkhandler.write([
('/domains/{}/state'.format(dom_uuid), target_state),
('/domains/{}/node'.format(dom_uuid), target_node),
('/domains/{}/lastnode'.format(dom_uuid), current_node)
(('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)
if wait:
while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == target_state:
time.sleep(1)
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
@ -649,7 +652,7 @@ def unmigrate_vm(zkhandler, domain, wait=False, force_live=False):
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('/domains/{}/state'.format(dom_uuid))
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
@ -659,27 +662,27 @@ def unmigrate_vm(zkhandler, domain, wait=False, force_live=False):
else:
target_state = 'migrate'
target_node = zkhandler.read('/domains/{}/lastnode'.format(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('/domains/{}/state'.format(dom_uuid))
lock = zkhandler.exclusivelock(('domain.state', dom_uuid))
with lock:
zkhandler.write([
('/domains/{}/state'.format(dom_uuid), target_state),
('/domains/{}/node'.format(dom_uuid), target_node),
('/domains/{}/lastnode'.format(dom_uuid), '')
(('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)
if wait:
while zkhandler.read('/domains/{}/state'.format(dom_uuid)) == target_state:
time.sleep(1)
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
@ -692,7 +695,7 @@ def get_console_log(zkhandler, domain, lines=1000):
return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
# Get the data from ZK
console_log = zkhandler.read('/domains/{}/consolelog'.format(dom_uuid))
console_log = zkhandler.read(('domain.log.console', dom_uuid))
# Shrink the log buffer to length lines
shrunk_log = console_log.split('\n')[-lines:]
@ -726,7 +729,7 @@ def get_list(zkhandler, node, state, limit, is_fuzzy=True):
if state not in valid_states:
return False, 'VM state "{}" is not valid.'.format(state)
full_vm_list = zkhandler.children('/domains')
full_vm_list = zkhandler.children('base.domain')
vm_list = []
# Set our limit to a sensible regex
@ -745,9 +748,9 @@ def get_list(zkhandler, node, state, limit, is_fuzzy=True):
vm_state = {}
for vm in full_vm_list:
# Check we don't match the limit
name = zkhandler.read('/domains/{}'.format(vm))
vm_node[vm] = zkhandler.read('/domains/{}/node'.format(vm))
vm_state[vm] = zkhandler.read('/domains/{}/state'.format(vm))
name = zkhandler.read(('domain', vm))
vm_node[vm] = zkhandler.read(('domain.node', vm))
vm_state[vm] = zkhandler.read(('domain.state', vm))
# Handle limiting
if limit:
try: