519 lines
19 KiB
Python
Executable File
519 lines
19 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
import kazoo.client, socket, time, click
|
|
import pvcf
|
|
from lxml import objectify
|
|
|
|
zk_host = '127.0.0.1:2181'
|
|
|
|
this_host = socket.gethostname()
|
|
|
|
CONTEXT_SETTINGS = dict(help_option_names=['-h', '--help'])
|
|
|
|
# Creates a new domain based on an XML file
|
|
def define_domain(domxmlfile, target_hypervisor):
|
|
with open(domxmlfile, 'r') as f_domxmlfile:
|
|
data = f_domxmlfile.read()
|
|
f_domxmlfile.close()
|
|
|
|
parsed_xml = objectify.fromstring(data)
|
|
domuuid = parsed_xml.uuid.text
|
|
domname = parsed_xml.name.text
|
|
print('Adding new VM with Name %s and UUID %s to database' % (domname, domuuid))
|
|
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
transaction = zk.transaction()
|
|
transaction.create('/domains/%s' % domuuid, domname.encode('ascii'))
|
|
transaction.create('/domains/%s/state' % domuuid, 'stop'.encode('ascii'))
|
|
transaction.create('/domains/%s/hypervisor' % domuuid, target_hypervisor.encode('ascii'))
|
|
transaction.create('/domains/%s/lasthypervisor' % domuuid, ''.encode('ascii'))
|
|
transaction.create('/domains/%s/name' % domuuid, data.encode('ascii'))
|
|
transaction.create('/domains/%s/xml' % domuuid, data.encode('ascii'))
|
|
results = transaction.commit()
|
|
print(results)
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
def delete_domain(domuuid):
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
|
|
# Set the domain into delete mode
|
|
transaction = zk.transaction()
|
|
transaction.set_data('/domains/%s/state' % domuuid, 'delete'.encode('ascii'))
|
|
results = transaction.commit()
|
|
print(results)
|
|
|
|
# Wait for 3 seconds to allow state to flow to all hypervisors
|
|
time.sleep(3)
|
|
|
|
# Delete the configurations
|
|
transaction = zk.transaction()
|
|
transaction.delete('/domains/%s/state' % domuuid)
|
|
transaction.delete('/domains/%s/hypervisor' % domuuid)
|
|
transaction.delete('/domains/%s/lasthypervisor' % domuuid)
|
|
transaction.delete('/domains/%s/xml' % domuuid)
|
|
transaction.delete('/domains/%s' % domuuid)
|
|
results = transaction.commit()
|
|
print(results)
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
# Migrate VM to target_hypervisor
|
|
def migrate_domain(domuuid, target_hypervisor):
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
current_hypervisor = zk.get('/domains/%s/hypervisor' % domuuid)[0].decode('ascii')
|
|
last_hypervisor = zk.get('/domains/%s/lasthypervisor' % domuuid)[0].decode('ascii')
|
|
if last_hypervisor != '':
|
|
print('The VM %s has been previously migrated from %s to %s. You must unmigrate it before migrating it again!' % (domuuid, last_hypervisor, current_hypervisor))
|
|
pvcf.stopZKConnection(zk)
|
|
return
|
|
|
|
print('Migrating VM with UUID %s from hypervisor %s to hypervisor %s' % (domuuid, current_hypervisor, target_hypervisor))
|
|
transaction = zk.transaction()
|
|
transaction.set_data('/domains/%s/state' % domuuid, 'migrate'.encode('ascii'))
|
|
transaction.set_data('/domains/%s/hypervisor' % domuuid, target_hypervisor.encode('ascii'))
|
|
transaction.set_data('/domains/%s/lasthypervisor' % domuuid, current_hypervisor.encode('ascii'))
|
|
results = transaction.commit()
|
|
print(results)
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
# Unmigrate VM back from previous hypervisor
|
|
def unmigrate_domain(domuuid):
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
target_hypervisor = zk.get('/domains/%s/lasthypervisor' % domuuid)[0].decode('ascii')
|
|
if target_hypervisor == '':
|
|
print('The VM %s has not been previously migrated and cannot be unmigrated.' % domuuid)
|
|
pvcf.stopZKConnection(zk)
|
|
return
|
|
print('Unmigrating VM with UUID %s back to hypervisor %s' % (domuuid, target_hypervisor))
|
|
transaction = zk.transaction()
|
|
transaction.set_data('/domains/%s/state' % domuuid, 'migrate'.encode('ascii'))
|
|
transaction.set_data('/domains/%s/hypervisor' % domuuid, target_hypervisor.encode('ascii'))
|
|
transaction.set_data('/domains/%s/lasthypervisor' % domuuid, ''.encode('ascii'))
|
|
results = transaction.commit()
|
|
print(results)
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
|
|
########################
|
|
########################
|
|
## ##
|
|
## CLICK COMPONENTS ##
|
|
## ##
|
|
########################
|
|
########################
|
|
|
|
###############################################################################
|
|
# pvc node
|
|
###############################################################################
|
|
@click.group(name='node', short_help='Manage a PVC hypervisor node', context_settings=CONTEXT_SETTINGS)
|
|
@click.option(
|
|
'-n', '--name', 'node_name', default=this_host, show_default=True,
|
|
help='The PVC node to operate on.'
|
|
)
|
|
def node():
|
|
"""
|
|
Manage the state of a node in the PVC cluster.
|
|
|
|
Notes:
|
|
|
|
* The '--name' option defaults to the current host if not set, which is likely not what you want when running this command from a remote host!
|
|
"""
|
|
pass
|
|
|
|
|
|
###############################################################################
|
|
# pvc node flush
|
|
###############################################################################
|
|
@click.command(name='flush', short_help='Take a node out of service')
|
|
def flush_host():
|
|
"""
|
|
Take a node out of active service and migrate away all VMs.
|
|
"""
|
|
pass
|
|
|
|
|
|
###############################################################################
|
|
# pvc node ready
|
|
###############################################################################
|
|
@click.command(name='ready', short_help='Restore node to service')
|
|
def ready_host():
|
|
"""
|
|
Restore a host to active service and migrate back all VMs.
|
|
"""
|
|
pass
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm
|
|
###############################################################################
|
|
@click.group(name='vm', short_help='Manage a PVC virtual machine', context_settings=CONTEXT_SETTINGS)
|
|
def vm():
|
|
"""
|
|
Manage the state of a virtual machine in the PVC cluster.
|
|
|
|
Notes:
|
|
|
|
* PVC virtual machines are always managed by UUID. To find a name-to-UUID mapping, use the 'search' command.
|
|
"""
|
|
pass
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm define
|
|
###############################################################################
|
|
@click.command(name='define', short_help='Define a new virtual machine from a Libvirt XML file.')
|
|
@click.option(
|
|
'-x', '--xml', 'xml_config_file',
|
|
help='The XML config file to define the domain from.'
|
|
)
|
|
@click.option(
|
|
'-v', '--hypervisor', 'target_hypervisor', default=this_host, show_default=True,
|
|
help='The home hypervisor for this domain.'
|
|
)
|
|
def define_vm(xml_config_file, target_hypervisor):
|
|
"""
|
|
Define a new virtual machine from a Libvirt XML configuration file.
|
|
|
|
Notes:
|
|
|
|
* The '--hypervisor' option defaults to the current host if not set, which is likely not what you want when running this command from a remote host!
|
|
"""
|
|
define_domain(xml_config_file, target_hypervisor)
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm start
|
|
###############################################################################
|
|
@click.command(name='start', short_help='Start up a defined virtual machine.')
|
|
@click.option(
|
|
'-n', '--name', 'dom_name',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_uuid', 'argument': '--uuid' }],
|
|
help='Search for this human-readable name.'
|
|
)
|
|
@click.option(
|
|
'-u', '--uuid', 'dom_uuid',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
|
|
help='Search for this UUID.'
|
|
)
|
|
def start_vm(dom_name, dom_uuid):
|
|
"""
|
|
Start up a virtual machine on its configured hypervisor.
|
|
"""
|
|
|
|
# Ensure at least one search method is set
|
|
if dom_name == None and dom_uuid == None:
|
|
click.echo("You must specify either a `--name` or `--uuid` value.")
|
|
return
|
|
|
|
# Open a Zookeeper connection
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
|
|
# If the --name value was passed, get the UUID
|
|
if dom_name != None:
|
|
dom_uuid = pvcf.searchClusterByName(zk, dom_name)
|
|
|
|
# Set the VM to start
|
|
zk.set('/domains/%s/state' % dom_uuid, 'start'.encode('ascii'))
|
|
|
|
# Close the Zookeeper connection
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm shutdown
|
|
###############################################################################
|
|
@click.command(name='shutdown', short_help='Gracefully shut down a running virtual machine.')
|
|
@click.option(
|
|
'-n', '--name', 'dom_name',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_uuid', 'argument': '--uuid' }],
|
|
help='Search for this human-readable name.'
|
|
)
|
|
@click.option(
|
|
'-u', '--uuid', 'dom_uuid',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
|
|
help='Search for this UUID.'
|
|
)
|
|
def shutdown_vm(dom_name, dom_uuid):
|
|
"""
|
|
Gracefully shut down a running virtual machine.
|
|
"""
|
|
|
|
# Ensure at least one search method is set
|
|
if dom_name == None and dom_uuid == None:
|
|
click.echo("You must specify either a `--name` or `--uuid` value.")
|
|
return
|
|
|
|
# Open a Zookeeper connection
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
|
|
# If the --name value was passed, get the UUID
|
|
if dom_name != None:
|
|
dom_uuid = pvcf.searchClusterByName(zk, dom_name)
|
|
|
|
# Set the VM to start
|
|
zk.set('/domains/%s/state' % dom_uuid, 'shutdown'.encode('ascii'))
|
|
|
|
# Close the Zookeeper connection
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm stop
|
|
###############################################################################
|
|
@click.command(name='stop', short_help='Forcibly halt a running virtual machine.')
|
|
@click.option(
|
|
'-n', '--name', 'dom_name',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_uuid', 'argument': '--uuid' }],
|
|
help='Search for this human-readable name.'
|
|
)
|
|
@click.option(
|
|
'-u', '--uuid', 'dom_uuid',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
|
|
help='Search for this UUID.'
|
|
)
|
|
def stop_vm(dom_name, dom_uuid):
|
|
"""
|
|
Forcibly halt (destroy) a running virtual machine.
|
|
"""
|
|
|
|
# Ensure at least one search method is set
|
|
if dom_name == None and dom_uuid == None:
|
|
click.echo("You must specify either a `--name` or `--uuid` value.")
|
|
return
|
|
|
|
# Open a Zookeeper connection
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
|
|
# If the --name value was passed, get the UUID
|
|
if dom_name != None:
|
|
dom_uuid = pvcf.searchClusterByName(zk, dom_name)
|
|
|
|
# Set the VM to start
|
|
zk.set('/domains/%s/state' % dom_uuid, 'stop'.encode('ascii'))
|
|
|
|
# Close the Zookeeper connection
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm migrate
|
|
###############################################################################
|
|
@click.command(name='migrate', short_help='Migrate a virtual machine to another node.')
|
|
@click.option(
|
|
'-n', '--name', 'dom_name',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_uuid', 'argument': '--uuid' }],
|
|
help='Search for this human-readable name.'
|
|
)
|
|
@click.option(
|
|
'-u', '--uuid', 'dom_uuid',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
|
|
help='Search for this UUID.'
|
|
)
|
|
@click.option(
|
|
'-t', '--target', 'target_hypervisor', default=None,
|
|
help='The target hypervisor to migrate to.'
|
|
)
|
|
@click.option(
|
|
'-f', '--force', 'force_migrate', is_flag=True, default=False,
|
|
help='Force migrate an already migrated VM.'
|
|
)
|
|
def migrate_vm(dom_name, dom_uuid, target_hypervisor, force_migrate):
|
|
"""
|
|
Migrate a running virtual machine, via live migration if possible, to another hypervisor node.
|
|
"""
|
|
|
|
# Ensure at least one search method is set
|
|
if dom_name == None and dom_uuid == None:
|
|
click.echo("You must specify either a `--name` or `--uuid` value.")
|
|
return
|
|
|
|
# Open a Zookeeper connection
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
|
|
# If the --name value was passed, get the UUID
|
|
if dom_name != None:
|
|
dom_uuid = pvcf.searchClusterByName(zk, dom_name)
|
|
|
|
current_hypervisor = zk.get('/domains/{}/hypervisor'.format(dom_uuid))[0].decode('ascii')
|
|
last_hypervisor = zk.get('/domains/{}/lasthypervisor'.format(dom_uuid))[0].decode('ascii')
|
|
|
|
if last_hypervisor != '' and force_migrate != True:
|
|
click.echo('The VM "{}" has been previously migrated.'.format(dom_uuid))
|
|
click.echo('> Last hypervisor: {}'.format(last_hypervisor))
|
|
click.echo('> Current hypervisor: {}'.format(current_hypervisor))
|
|
click.echo('Run `vm unmigrate` to restore the VM to its previous hypervisor, or use `--force` to override this check.')
|
|
return
|
|
|
|
if target_hypervisor == None:
|
|
# Determine the best hypervisor to migrate the VM to based on active memory usage
|
|
hypervisor_list = zk.get_children('/nodes')
|
|
most_memfree = 0
|
|
for hypervisor in hypervisor_list:
|
|
state = zk.get('/nodes/{}/state'.format(hypervisor))[0].decode('ascii')
|
|
if state != 'start' or hypervisor == current_hypervisor:
|
|
continue
|
|
|
|
memfree = int(zk.get('/nodes/{}/memfree'.format(hypervisor))[0].decode('ascii'))
|
|
if memfree > most_memfree:
|
|
most_memfree = memfree
|
|
target_hypervisor = hypervisor
|
|
else:
|
|
if target_hypervisor == current_hypervisor:
|
|
click.echo('The VM "{}" is already running on hypervisor "{}".'.format(dom_uuid, current_hypervisor))
|
|
return
|
|
|
|
click.echo('Migrating VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
|
|
transaction = zk.transaction()
|
|
transaction.set_data('/domains/{}/state'.format(dom_uuid), 'migrate'.encode('ascii'))
|
|
transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), target_hypervisor.encode('ascii'))
|
|
transaction.set_data('/domains/{}/lasthypervisor'.format(dom_uuid), current_hypervisor.encode('ascii'))
|
|
transaction.commit()
|
|
|
|
# Close the Zookeeper connection
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
|
|
###############################################################################
|
|
# pvc vm unmigrate
|
|
###############################################################################
|
|
@click.command(name='unmigrate', short_help='Restore a migrated virtual machine to its original node.')
|
|
@click.option(
|
|
'-n', '--name', 'dom_name',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_uuid', 'argument': '--uuid' }],
|
|
help='Search for this human-readable name.'
|
|
)
|
|
@click.option(
|
|
'-u', '--uuid', 'dom_uuid',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
|
|
help='Search for this UUID.'
|
|
)
|
|
def unmigrate_vm(dom_name, dom_uuid):
|
|
"""
|
|
Restore a previously migrated virtual machine, via live migration if possible, to its original hypervisor node.
|
|
"""
|
|
|
|
# Ensure at least one search method is set
|
|
if dom_name == None and dom_uuid == None:
|
|
click.echo("You must specify either a `--name` or `--uuid` value.")
|
|
return
|
|
|
|
# Open a Zookeeper connection
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
|
|
# If the --name value was passed, get the UUID
|
|
if dom_name != None:
|
|
dom_uuid = pvcf.searchClusterByName(zk, dom_name)
|
|
|
|
target_hypervisor = zk.get('/domains/{}/lasthypervisor'.format(dom_uuid))[0].decode('ascii')
|
|
|
|
if target_hypervisor == '':
|
|
click.echo('The VM "{}" has not been previously migrated.'.format(dom_uuid))
|
|
return
|
|
|
|
click.echo('Unmigrating VM "{}" back to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
|
|
transaction = zk.transaction()
|
|
transaction.set_data('/domains/{}/state'.format(dom_uuid), 'migrate'.encode('ascii'))
|
|
transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), target_hypervisor.encode('ascii'))
|
|
transaction.set_data('/domains/{}/lasthypervisor'.format(dom_uuid), ''.encode('ascii'))
|
|
transaction.commit()
|
|
|
|
# Close the Zookeeper connection
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
|
|
###############################################################################
|
|
# pvc search
|
|
###############################################################################
|
|
@click.command(name='search', short_help='Search for a VM object')
|
|
@click.option(
|
|
'-n', '--name', 'dom_name',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_uuid', 'argument': '--uuid' }],
|
|
help='Search for this human-readable name.'
|
|
)
|
|
@click.option(
|
|
'-u', '--uuid', 'dom_uuid',
|
|
cls=pvcf.MutuallyExclusiveOption,
|
|
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
|
|
help='Search for this UUID.'
|
|
)
|
|
@click.option(
|
|
'-l', '--long', 'long_output', is_flag=True, default=False,
|
|
help='Display more detailed information.'
|
|
)
|
|
def search(dom_name, dom_uuid, long_output):
|
|
"""
|
|
Search the cluster for a virtual machine's information.
|
|
"""
|
|
|
|
# Ensure at least one search method is set
|
|
if dom_name == None and dom_uuid == None:
|
|
click.echo("You must specify either a `--name` or `--uuid` value.")
|
|
return
|
|
|
|
zk = pvcf.startZKConnection(zk_host)
|
|
if dom_name != None:
|
|
dom_uuid = pvcf.searchClusterByName(zk, dom_name)
|
|
if dom_uuid != None:
|
|
dom_name = pvcf.searchClusterByUUID(zk, dom_uuid)
|
|
|
|
information = pvcf.getInformationFromXML(zk, dom_uuid, long_output)
|
|
click.echo(information)
|
|
pvcf.stopZKConnection(zk)
|
|
|
|
#define_domain('/var/home/joshua/debian9.xml')
|
|
#start_domain('b1dc4e21-544f-47aa-9bb7-8af0bc443b78')
|
|
#stop_domain('b1dc4e21-544f-47aa-9bb7-8af0bc443b78')
|
|
#migrate_domain('b1dc4e21-544f-47aa-9bb7-8af0bc443b78', 'test1.i.bonilan.net')
|
|
#migrate_domain('b1dc4e21-544f-47aa-9bb7-8af0bc443b78', 'test2.i.bonilan.net')
|
|
#unmigrate_domain('b1dc4e21-544f-47aa-9bb7-8af0bc443b78')
|
|
|
|
###############################################################################
|
|
# pvc help
|
|
###############################################################################
|
|
@click.command()
|
|
def help():
|
|
print('pvc - Parallel Virtual Cluster command-line utility')
|
|
|
|
@click.group(context_settings=CONTEXT_SETTINGS)
|
|
def cli():
|
|
"""Parallel Virtual Cluster CLI management tool"""
|
|
pass
|
|
|
|
#
|
|
# Click command tree
|
|
#
|
|
node.add_command(flush_host)
|
|
node.add_command(ready_host)
|
|
#node.add_command(get_details)
|
|
|
|
vm.add_command(define_vm)
|
|
vm.add_command(start_vm)
|
|
vm.add_command(shutdown_vm)
|
|
vm.add_command(stop_vm)
|
|
vm.add_command(migrate_vm)
|
|
vm.add_command(unmigrate_vm)
|
|
#vm.add_command(get_details)
|
|
|
|
cli.add_command(node)
|
|
cli.add_command(vm)
|
|
cli.add_command(search)
|
|
|
|
#
|
|
# Main entry point
|
|
#
|
|
def main():
|
|
return cli(obj={})
|
|
|
|
if __name__ == '__main__':
|
|
main()
|