def _live_migration_dest_check(self, context, instance_ref, dest,
block_migration):
"""Live migration check routine (for destination host).
:param context: security context
:param instance_ref: engine.db.sqlalchemy.models.Instance object
:param dest: destination host
"""
# Checking dest exists and compute node.
dservice_refs = db.service_get_all_compute_by_host(context, dest)
dservice_ref = dservice_refs[0]
# Checking dest host is alive.
if not self.service_is_up(dservice_ref):
raise exception.ComputeServiceUnavailable(host=dest)
# Checking whether The host where instance is running
# and dest is not same.
src = instance_ref['host']
if dest == src:
instance_id = ec2utils.id_to_ec2_id(instance_ref['id'])
raise exception.UnableToMigrateToSelf(instance_id=instance_id,
host=dest)
# Checking dst host still has enough capacities.
self.assert_compute_node_has_enough_resources(context, instance_ref,
dest, block_migration)
def update_available_resource(self, ctxt, host):
"""Updates compute manager resource info on ComputeNode table.
Since we don't have a real hypervisor, pretend we have lots of
disk and ram.
"""
try:
service_ref = db.service_get_all_compute_by_host(ctxt, host)[0]
except exception.NotFound:
raise exception.ComputeServiceUnavailable(host=host)
# Updating host information
dic = {'vcpus': 1,
'memory_mb': 4096,
'local_gb': 1028,
'vcpus_used': 0,
'memory_mb_used': 0,
'local_gb_used': 0,
'hypervisor_type': 'fake',
'hypervisor_version': '1.0',
'cpu_info': '?'}
compute_node_ref = service_ref['compute_node']
if not compute_node_ref:
LOG.info(_('Compute_service record created for %s ') % host)
dic['service_id'] = service_ref['id']
db.compute_node_create(ctxt, dic)
else:
LOG.info(_('Compute_service record updated for %s ') % host)
db.compute_node_update(ctxt, compute_node_ref[0]['id'], dic)
def _live_migration_src_check(self, context, instance_ref):
"""Live migration check routine (for src host).
:param context: security context
:param instance_ref: engine.db.sqlalchemy.models.Instance object
"""
# Checking instance is running.
if instance_ref['power_state'] != power_state.RUNNING:
instance_id = ec2utils.id_to_ec2_id(instance_ref['id'])
raise exception.InstanceNotRunning(instance_id=instance_id)
# Checing volume node is running when any volumes are mounted
# to the instance.
if len(instance_ref['volumes']) != 0:
services = db.service_get_all_by_topic(context, 'volume')
if len(services) < 1 or not self.service_is_up(services[0]):
raise exception.VolumeServiceUnavailable()
# Checking src host exists and compute node
src = instance_ref['host']
services = db.service_get_all_compute_by_host(context, src)
# Checking src host is alive.
if not self.service_is_up(services[0]):
raise exception.ComputeServiceUnavailable(host=src)
def _live_migration_dest_check(self, context, instance_ref, dest,
block_migration):
"""Live migration check routine (for destination host).
:param context: security context
:param instance_ref: engine.db.sqlalchemy.models.Instance object
:param dest: destination host
"""
# Checking dest exists and compute node.
dservice_refs = db.service_get_all_compute_by_host(context, dest)
dservice_ref = dservice_refs[0]
# Checking dest host is alive.
if not self.service_is_up(dservice_ref):
raise exception.ComputeServiceUnavailable(host=dest)
# Checking whether The host where instance is running
# and dest is not same.
src = instance_ref['host']
if dest == src:
instance_id = ec2utils.id_to_ec2_id(instance_ref['id'])
raise exception.UnableToMigrateToSelf(instance_id=instance_id,
host=dest)
# Checking dst host still has enough capacities.
self.assert_compute_node_has_enough_resources(context,
instance_ref,
dest,
block_migration)
def _live_migration_src_check(self, context, instance_ref):
"""Live migration check routine (for src host).
:param context: security context
:param instance_ref: engine.db.sqlalchemy.models.Instance object
"""
# Checking instance is running.
if instance_ref['power_state'] != power_state.RUNNING:
instance_id = ec2utils.id_to_ec2_id(instance_ref['id'])
raise exception.InstanceNotRunning(instance_id=instance_id)
# Checing volume node is running when any volumes are mounted
# to the instance.
if len(instance_ref['volumes']) != 0:
services = db.service_get_all_by_topic(context, 'volume')
if len(services) < 1 or not self.service_is_up(services[0]):
raise exception.VolumeServiceUnavailable()
# Checking src host exists and compute node
src = instance_ref['host']
services = db.service_get_all_compute_by_host(context, src)
# Checking src host is alive.
if not self.service_is_up(services[0]):
raise exception.ComputeServiceUnavailable(host=src)
def _get_compute_info(self, context, host, key):
"""get compute node's information specified by key
:param context: security context
:param host: hostname(must be compute node)
:param key: column name of compute_nodes
:return: value specified by key
"""
compute_node_ref = db.service_get_all_compute_by_host(context, host)
compute_node_ref = compute_node_ref[0]['compute_node'][0]
return compute_node_ref[key]
def _get_compute_info(self, context, host, key):
"""get compute node's information specified by key
:param context: security context
:param host: hostname(must be compute node)
:param key: column name of compute_nodes
:return: value specified by key
"""
compute_node_ref = db.service_get_all_compute_by_host(context, host)
compute_node_ref = compute_node_ref[0]['compute_node'][0]
return compute_node_ref[key]
def show_host_resources(self, context, host):
"""Shows the physical/usage resource given by hosts.
:param context: security context
:param host: hostname
:returns:
example format is below.
{'resource':D, 'usage':{proj_id1:D, proj_id2:D}}
D: {'vcpus': 3, 'memory_mb': 2048, 'local_gb': 2048,
'vcpus_used': 12, 'memory_mb_used': 10240,
'local_gb_used': 64}
"""
# Getting compute node info and related instances info
compute_ref = db.service_get_all_compute_by_host(context, host)
compute_ref = compute_ref[0]
instance_refs = db.instance_get_all_by_host(context,
compute_ref['host'])
# Getting total available/used resource
compute_ref = compute_ref['compute_node'][0]
resource = {'vcpus': compute_ref['vcpus'],
'memory_mb': compute_ref['memory_mb'],
'local_gb': compute_ref['local_gb'],
'vcpus_used': compute_ref['vcpus_used'],
'memory_mb_used': compute_ref['memory_mb_used'],
'local_gb_used': compute_ref['local_gb_used']}
usage = dict()
if not instance_refs:
return {'resource': resource, 'usage': usage}
# Getting usage resource per project
project_ids = [i['project_id'] for i in instance_refs]
project_ids = list(set(project_ids))
for project_id in project_ids:
vcpus = [i['vcpus'] for i in instance_refs \
if i['project_id'] == project_id]
mem = [i['memory_mb'] for i in instance_refs \
if i['project_id'] == project_id]
disk = [i['local_gb'] for i in instance_refs \
if i['project_id'] == project_id]
usage[project_id] = {'vcpus': reduce(lambda x, y: x + y, vcpus),
'memory_mb': reduce(lambda x, y: x + y, mem),
'local_gb': reduce(lambda x, y: x + y, disk)}
return {'resource': resource, 'usage': usage}
def update_available_resource(self, ctxt, host):
"""Updates compute manager resource info on ComputeNode table.
This method is called when engine-compute launches, and
whenever admin executes "engine-manage service update_resource".
:param ctxt: security context
:param host: hostname that compute manager is currently running
"""
try:
service_ref = db.service_get_all_compute_by_host(ctxt, host)[0]
except exception.NotFound:
raise exception.ComputeServiceUnavailable(host=host)
host_stats = self.get_host_stats(refresh=True)
# Updating host information
total_ram_mb = host_stats['host_memory_total'] / (1024 * 1024)
free_ram_mb = host_stats['host_memory_free'] / (1024 * 1024)
total_disk_gb = host_stats['disk_total'] / (1024 * 1024 * 1024)
used_disk_gb = host_stats['disk_used'] / (1024 * 1024 * 1024)
dic = {
'vcpus': 0,
'memory_mb': total_ram_mb,
'local_gb': total_disk_gb,
'vcpus_used': 0,
'memory_mb_used': total_ram_mb - free_ram_mb,
'local_gb_used': used_disk_gb,
'hypervisor_type': 'xen',
'hypervisor_version': 0,
'cpu_info': host_stats['host_cpu_info']['cpu_count']
}
compute_node_ref = service_ref['compute_node']
if not compute_node_ref:
LOG.info(_('Compute_service record created for %s ') % host)
dic['service_id'] = service_ref['id']
db.compute_node_create(ctxt, dic)
else:
LOG.info(_('Compute_service record updated for %s ') % host)
db.compute_node_update(ctxt, compute_node_ref[0]['id'], dic)
def update_available_resource(self, ctxt, host):
"""Updates compute manager resource info on ComputeNode table.
This method is called when engine-compute launches, and
whenever admin executes "engine-manage service update_resource".
:param ctxt: security context
:param host: hostname that compute manager is currently running
"""
try:
service_ref = db.service_get_all_compute_by_host(ctxt, host)[0]
except exception.NotFound:
raise exception.ComputeServiceUnavailable(host=host)
host_stats = self.get_host_stats(refresh=True)
# Updating host information
total_ram_mb = host_stats['host_memory_total'] / (1024 * 1024)
free_ram_mb = host_stats['host_memory_free'] / (1024 * 1024)
total_disk_gb = host_stats['disk_total'] / (1024 * 1024 * 1024)
used_disk_gb = host_stats['disk_used'] / (1024 * 1024 * 1024)
dic = {'vcpus': 0,
'memory_mb': total_ram_mb,
'local_gb': total_disk_gb,
'vcpus_used': 0,
'memory_mb_used': total_ram_mb - free_ram_mb,
'local_gb_used': used_disk_gb,
'hypervisor_type': 'xen',
'hypervisor_version': 0,
'cpu_info': host_stats['host_cpu_info']['cpu_count']}
compute_node_ref = service_ref['compute_node']
if not compute_node_ref:
LOG.info(_('Compute_service record created for %s ') % host)
dic['service_id'] = service_ref['id']
db.compute_node_create(ctxt, dic)
else:
LOG.info(_('Compute_service record updated for %s ') % host)
db.compute_node_update(ctxt, compute_node_ref[0]['id'], dic)
def _live_migration_common_check(self, context, instance_ref, dest,
block_migration):
"""Live migration common check routine.
Below checkings are followed by
http://wiki.libvirt.org/page/TodoPreMigrationChecks
:param context: security context
:param instance_ref: engine.db.sqlalchemy.models.Instance object
:param dest: destination host
:param block_migration if True, check for block_migration.
"""
# Checking shared storage connectivity
# if block migration, instances_paths should not be on shared storage.
try:
self.mounted_on_same_shared_storage(context, instance_ref, dest)
if block_migration:
reason = _("Block migration can not be used "
"with shared storage.")
raise exception.InvalidSharedStorage(reason=reason, path=dest)
except exception.FileNotFound:
if not block_migration:
src = instance_ref['host']
ipath = FLAGS.instances_path
LOG.error(
_("Cannot confirm tmpfile at %(ipath)s is on "
"same shared storage between %(src)s "
"and %(dest)s.") % locals())
raise
# Checking dest exists.
dservice_refs = db.service_get_all_compute_by_host(context, dest)
dservice_ref = dservice_refs[0]['compute_node'][0]
# Checking original host( where instance was launched at) exists.
try:
oservice_refs = db.service_get_all_compute_by_host(
context, instance_ref['launched_on'])
except exception.NotFound:
raise exception.SourceHostUnavailable()
oservice_ref = oservice_refs[0]['compute_node'][0]
# Checking hypervisor is same.
orig_hypervisor = oservice_ref['hypervisor_type']
dest_hypervisor = dservice_ref['hypervisor_type']
if orig_hypervisor != dest_hypervisor:
raise exception.InvalidHypervisorType()
# Checkng hypervisor version.
orig_hypervisor = oservice_ref['hypervisor_version']
dest_hypervisor = dservice_ref['hypervisor_version']
if orig_hypervisor > dest_hypervisor:
raise exception.DestinationHypervisorTooOld()
# Checking cpuinfo.
try:
rpc.call(
context, db.queue_get_for(context, FLAGS.compute_topic, dest),
{
"method": 'compare_cpu',
"args": {
'cpu_info': oservice_ref['cpu_info']
}
})
except rpc.RemoteError:
src = instance_ref['host']
LOG.exception(
_("host %(dest)s is not compatible with "
"original host %(src)s.") % locals())
raise
def _live_migration_common_check(self, context, instance_ref, dest,
block_migration):
"""Live migration common check routine.
Below checkings are followed by
http://wiki.libvirt.org/page/TodoPreMigrationChecks
:param context: security context
:param instance_ref: engine.db.sqlalchemy.models.Instance object
:param dest: destination host
:param block_migration if True, check for block_migration.
"""
# Checking shared storage connectivity
# if block migration, instances_paths should not be on shared storage.
try:
self.mounted_on_same_shared_storage(context, instance_ref, dest)
if block_migration:
reason = _("Block migration can not be used "
"with shared storage.")
raise exception.InvalidSharedStorage(reason=reason, path=dest)
except exception.FileNotFound:
if not block_migration:
src = instance_ref['host']
ipath = FLAGS.instances_path
LOG.error(_("Cannot confirm tmpfile at %(ipath)s is on "
"same shared storage between %(src)s "
"and %(dest)s.") % locals())
raise
# Checking dest exists.
dservice_refs = db.service_get_all_compute_by_host(context, dest)
dservice_ref = dservice_refs[0]['compute_node'][0]
# Checking original host( where instance was launched at) exists.
try:
oservice_refs = db.service_get_all_compute_by_host(context,
instance_ref['launched_on'])
except exception.NotFound:
raise exception.SourceHostUnavailable()
oservice_ref = oservice_refs[0]['compute_node'][0]
# Checking hypervisor is same.
orig_hypervisor = oservice_ref['hypervisor_type']
dest_hypervisor = dservice_ref['hypervisor_type']
if orig_hypervisor != dest_hypervisor:
raise exception.InvalidHypervisorType()
# Checkng hypervisor version.
orig_hypervisor = oservice_ref['hypervisor_version']
dest_hypervisor = dservice_ref['hypervisor_version']
if orig_hypervisor > dest_hypervisor:
raise exception.DestinationHypervisorTooOld()
# Checking cpuinfo.
try:
rpc.call(context,
db.queue_get_for(context, FLAGS.compute_topic, dest),
{"method": 'compare_cpu',
"args": {'cpu_info': oservice_ref['cpu_info']}})
except rpc.RemoteError:
src = instance_ref['host']
LOG.exception(_("host %(dest)s is not compatible with "
"original host %(src)s.") % locals())
raise
