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pvc
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Some more major tweaks to client and rename the 'formerhypervisor' to 'lasthypervisor'

This commit is contained in:
Joshua Boniface 2018-06-05 22:06:08 -04:00
parent 62c5099d8f
commit dacce87175
3 changed files with 170 additions and 72 deletions
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4
NodeInstance.py
View File

@ -100,8 +100,8 @@ class NodeInstance(threading.Thread):
def unflush(self):
print('>>> Restoring node %s to active service' % self.name)
for domain in self.s_domain:
former_hypervisor = self.zk.get("/domains/" + domain + '/formerhypervisor')[0].decode('ascii')
if former_hypervisor == self.name:
last_hypervisor = self.zk.get("/domains/" + domain + '/lasthypervisor')[0].decode('ascii')
if last_hypervisor == self.name:
print(">>> Setting unmigration for %s" % domain)
transaction = self.zk.transaction()
transaction.set_data('/domains/' + domain + '/state', 'migrate'.encode('ascii'))

230
pvc.py
View File

@ -26,7 +26,7 @@ def define_domain(domxmlfile, target_hypervisor):
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/formerhypervisor' % domuuid, ''.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()
@ -49,47 +49,20 @@ def delete_domain(domuuid):
transaction = zk.transaction()
transaction.delete('/domains/%s/state' % domuuid)
transaction.delete('/domains/%s/hypervisor' % domuuid)
transaction.delete('/domains/%s/formerhypervisor' % 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)
# Start up a domain
def start_domain(domuuid):
zk = pvcf.startZKConnection(zk_host)
transaction = zk.transaction()
transaction.set_data('/domains/%s/state' % domuuid, 'start'.encode('ascii'))
results = transaction.commit()
print(results)
pvcf.stopZKConnection(zk)
# Shut down a domain
def shutdown_domain(domuuid):
zk = pvcf.startZKConnection(zk_host)
transaction = zk.transaction()
transaction.set_data('/domains/%s/state' % domuuid, 'shutdown'.encode('ascii'))
results = transaction.commit()
print(results)
pvcf.stopZKConnection(zk)
# Stop a domain
def stop_domain(domuuid):
zk = pvcf.startZKConnection(zk_host)
transaction = zk.transaction()
transaction.set_data('/domains/%s/state' % domuuid, 'stop'.encode('ascii'))
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')
former_hypervisor = zk.get('/domains/%s/formerhypervisor' % domuuid)[0].decode('ascii')
if former_hypervisor != '':
print('The VM %s has been previously migrated from %s to %s. You must unmigrate it before migrating it again!' % (domuuid, former_hypervisor, current_hypervisor))
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
@ -97,7 +70,7 @@ def migrate_domain(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/formerhypervisor' % domuuid, current_hypervisor.encode('ascii'))
transaction.set_data('/domains/%s/lasthypervisor' % domuuid, current_hypervisor.encode('ascii'))
results = transaction.commit()
print(results)
pvcf.stopZKConnection(zk)
@ -105,7 +78,7 @@ def migrate_domain(domuuid, target_hypervisor):
# Unmigrate VM back from previous hypervisor
def unmigrate_domain(domuuid):
zk = pvcf.startZKConnection(zk_host)
target_hypervisor = zk.get('/domains/%s/formerhypervisor' % domuuid)[0].decode('ascii')
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)
@ -114,7 +87,7 @@ def unmigrate_domain(domuuid):
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/formerhypervisor' % domuuid, ''.encode('ascii'))
transaction.set_data('/domains/%s/lasthypervisor' % domuuid, ''.encode('ascii'))
results = transaction.commit()
print(results)
pvcf.stopZKConnection(zk)
@ -214,13 +187,13 @@ def define_vm(xml_config_file, target_hypervisor):
@click.option(
'-n', '--name', 'dom_name',
cls=pvcf.MutuallyExclusiveOption,
mutually_exclusive=["dom_uuid"],
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=["dom_name"],
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
help='Search for this UUID.'
)
def start_vm(dom_name, dom_uuid):
@ -230,7 +203,7 @@ def start_vm(dom_name, dom_uuid):
# 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.")
click.echo("You must specify either a `--name` or `--uuid` value.")
return
# Open a Zookeeper connection
@ -243,7 +216,7 @@ def start_vm(dom_name, dom_uuid):
# Set the VM to start
zk.set('/domains/%s/state' % dom_uuid, 'start'.encode('ascii'))
# Close the zookeeper connection
# Close the Zookeeper connection
pvcf.stopZKConnection(zk)
@ -254,13 +227,13 @@ def start_vm(dom_name, dom_uuid):
@click.option(
'-n', '--name', 'dom_name',
cls=pvcf.MutuallyExclusiveOption,
mutually_exclusive=["dom_uuid"],
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=["dom_name"],
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
help='Search for this UUID.'
)
def shutdown_vm(dom_name, dom_uuid):
@ -270,7 +243,7 @@ def shutdown_vm(dom_name, dom_uuid):
# 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.")
click.echo("You must specify either a `--name` or `--uuid` value.")
return
# Open a Zookeeper connection
@ -283,7 +256,7 @@ def shutdown_vm(dom_name, dom_uuid):
# Set the VM to start
zk.set('/domains/%s/state' % dom_uuid, 'shutdown'.encode('ascii'))
# Close the zookeeper connection
# Close the Zookeeper connection
pvcf.stopZKConnection(zk)
@ -294,13 +267,13 @@ def shutdown_vm(dom_name, dom_uuid):
@click.option(
'-n', '--name', 'dom_name',
cls=pvcf.MutuallyExclusiveOption,
mutually_exclusive=["dom_uuid"],
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=["dom_name"],
mutually_exclusive=[{ 'function': 'dom_name', 'argument': '--name' }],
help='Search for this UUID.'
)
def stop_vm(dom_name, dom_uuid):
@ -310,7 +283,7 @@ def stop_vm(dom_name, dom_uuid):
# 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.")
click.echo("You must specify either a `--name` or `--uuid` value.")
return
# Open a Zookeeper connection
@ -323,38 +296,154 @@ def stop_vm(dom_name, dom_uuid):
# Set the VM to start
zk.set('/domains/%s/state' % dom_uuid, 'stop'.encode('ascii'))
# Close the zookeeper connection
# Close the Zookeeper connection
pvcf.stopZKConnection(zk)
###############################################################################
# pvc vm migrate
###############################################################################
@click.command(name='migrate', short_help='Migrate a virtual machine to another node.')
def migrate_vm():
"""
Migrate a running virtual machine, via live migration if possible, to another hypervisor node.
"""
pass
@click.command(name='unmigrate', short_help='Restore a migrated virtual machine to its original node.')
def unmigrate_vm():
"""
Restore a previously migrated virtual machine, via live migration if possible, to its original hypervisor node.
"""
pass
#
# Search-level commands
#
@click.command(name='search', short_help='Search for a VM object')
@click.option(
'-n', '--name', 'dom_name',
cls=pvcf.MutuallyExclusiveOption,
mutually_exclusive=["dom_uuid"],
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=["dom_name"],
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(
@ -365,6 +454,12 @@ 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)
@ -382,6 +477,9 @@ def search(dom_name, dom_uuid, long_output):
#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')

8
pvcf.py
View File

@ -70,9 +70,9 @@ def getInformationFromXML(zk, uuid, long_output):
xml = zk.get('/domains/%s/xml' % uuid)[0].decode('ascii')
dstate = zk.get('/domains/%s/state' % uuid)[0].decode('ascii')
dhypervisor = zk.get('/domains/%s/hypervisor' % uuid)[0].decode('ascii')
dformerhypervisor = zk.get('/domains/%s/formerhypervisor' % uuid)[0].decode('ascii')
if dformerhypervisor == '':
dformerhypervisor = 'N/A'
dlasthypervisor = zk.get('/domains/%s/lasthypervisor' % uuid)[0].decode('ascii')
if dlasthypervisor == '':
dlasthypervisor = 'N/A'
# Parse XML using lxml.objectify
parsed_xml = lxml.objectify.fromstring(xml)
@ -150,7 +150,7 @@ def getInformationFromXML(zk, uuid, long_output):
ainformation.append('')
ainformation.append('State: {}'.format(dstate))
ainformation.append('Active Hypervisor: {}'.format(dhypervisor))
ainformation.append('Former Hypervisor: {}'.format(dformerhypervisor))
ainformation.append('Last Hypervisor: {}'.format(dlasthypervisor))
if long_output == True:
# Disk list