def __init__(self, virtapi, read_only=False):
super(EC2Driver, self).__init__(virtapi)
self.host_status_base = {
'vcpus': VCPUS,
'memory_mb': MEMORY_IN_MBS,
'local_gb': DISK_IN_GB,
'vcpus_used': 0,
'memory_mb_used': 0,
'local_gb_used': 100000000000,
'hypervisor_type': 'EC2',
'hypervisor_version': '1.0',
'hypervisor_hostname': CONF.host,
'cpu_info': {},
'disk_available_least': 500000000000,
}
self._mounts = {}
self._interfaces = {}
self.creds = get_nova_creds()
self.nova = client.Client(**self.creds)
region = RegionInfo(name=aws_region, endpoint=aws_endpoint)
self.ec2_conn = ec2.EC2Connection(aws_access_key_id=CONF.ec2driver.ec2_access_key_id,
aws_secret_access_key=CONF.ec2driver.ec2_secret_access_key,
host=host,
port=port,
region=region,
is_secure=secure)
self.cloudwatch_conn = ec2.cloudwatch.connect_to_region(
aws_region, aws_access_key_id=CONF.ec2driver.ec2_access_key_id, aws_secret_access_key=CONF.ec2driver.ec2_secret_access_key)
self.security_group_lock = Lock()
self.instance_rule_refresher = InstanceRuleRefresher(
GroupRuleRefresher(
ec2_connection=self.ec2_conn,
openstack_rule_service=OpenstackRuleService(
group_service=OpenstackGroupService(self.nova.security_groups),
openstack_rule_transformer=OpenstackRuleTransformer()
),
ec2_rule_service=EC2RuleService(
ec2_connection=self.ec2_conn,
ec2_rule_transformer=EC2RuleTransformer(self.ec2_conn)
)
)
)
if not '_EC2_NODES' in globals():
set_nodes([CONF.host])
class EC2Driver(driver.ComputeDriver):
capabilities = {
"has_imagecache": True,
"supports_recreate": True,
}
"""EC2 hypervisor driver. Respurposing for EC2"""
def __init__(self, virtapi, read_only=False):
super(EC2Driver, self).__init__(virtapi)
self.host_status_base = {
'vcpus': VCPUS,
'memory_mb': MEMORY_IN_MBS,
'local_gb': DISK_IN_GB,
'vcpus_used': 0,
'memory_mb_used': 0,
'local_gb_used': 100000000000,
'hypervisor_type': 'EC2',
'hypervisor_version': '1.0',
'hypervisor_hostname': CONF.host,
'cpu_info': {},
'disk_available_least': 500000000000,
}
self._mounts = {}
self._interfaces = {}
self.creds = get_nova_creds()
self.nova = client.Client(**self.creds)
region = RegionInfo(name=aws_region, endpoint=aws_endpoint)
self.ec2_conn = ec2.EC2Connection(aws_access_key_id=CONF.ec2driver.ec2_access_key_id,
aws_secret_access_key=CONF.ec2driver.ec2_secret_access_key,
host=host,
port=port,
region=region,
is_secure=secure)
self.cloudwatch_conn = ec2.cloudwatch.connect_to_region(
aws_region, aws_access_key_id=CONF.ec2driver.ec2_access_key_id, aws_secret_access_key=CONF.ec2driver.ec2_secret_access_key)
self.security_group_lock = Lock()
self.instance_rule_refresher = InstanceRuleRefresher(
GroupRuleRefresher(
ec2_connection=self.ec2_conn,
openstack_rule_service=OpenstackRuleService(
group_service=OpenstackGroupService(self.nova.security_groups),
openstack_rule_transformer=OpenstackRuleTransformer()
),
ec2_rule_service=EC2RuleService(
ec2_connection=self.ec2_conn,
ec2_rule_transformer=EC2RuleTransformer(self.ec2_conn)
)
)
)
if not '_EC2_NODES' in globals():
set_nodes([CONF.host])
def init_host(self, host):
"""Initialize anything that is necessary for the driver to function,
including catching up with currently running VM's on the given host.
"""
return
def list_instances(self):
"""Return the names of all the instances known to the virtualization
layer, as a list.
"""
all_instances = self.ec2_conn.get_all_instances()
instance_ids = []
for instance in all_instances:
instance_ids.append(instance.id)
return instance_ids
def plug_vifs(self, instance, network_info):
"""Plug VIFs into networks."""
pass
def unplug_vifs(self, instance, network_info):
"""Unplug VIFs from networks."""
pass
def spawn(self, context, instance, image_meta, injected_files,
admin_password, network_info=None, block_device_info=None):
"""Create a new instance/VM/domain on the virtualization platform.
Once this successfully completes, the instance should be
running (power_state.RUNNING).
If this fails, any partial instance should be completely
cleaned up, and the virtualization platform should be in the state
that it was before this call began.
:param context: security context <Not Yet Implemented>
:param instance: nova.objects.instance.Instance
This function should use the data there to guide
the creation of the new instance.
:param image_meta: image object returned by nova.image.glance that
defines the image from which to boot this instance
:param injected_files: User files to inject into instance.
:param admin_password: set in instance. <Not Yet Implemented>
:param network_info:
:py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info`
:param block_device_info: Information about block devices to be
attached to the instance.
"""
LOG.info("***** Calling SPAWN *******************")
LOG.info("****** %s" % instance._user_data)
LOG.info("****** Allocating an elastic IP *********")
elastic_ip_address = self.ec2_conn.allocate_address(domain='vpc')
#Creating the EC2 instance
flavor_type = flavor_map[instance.get_flavor().id]
#passing user_data from the openstack instance which is Base64 encoded after decoding it.
user_data = instance._user_data
if user_data:
user_data = base64.b64decode(user_data)
reservation = self.ec2_conn.run_instances(aws_ami, instance_type=flavor_type, subnet_id=ec2_subnet_id,
user_data=user_data)
ec2_instance = reservation.instances
ec2_id = ec2_instance[0].id
self._wait_for_state(instance, ec2_id, "running", power_state.RUNNING)
instance['metadata'].update({'ec2_id': ec2_id, 'public_ip_address': elastic_ip_address.public_ip})
LOG.info("****** Associating the elastic IP to the instance *********")
self.ec2_conn.associate_address(instance_id=ec2_id, allocation_id=elastic_ip_address.allocation_id)
def snapshot(self, context, instance, image_id, update_task_state):
"""Snapshot an image of the specified instance
on EC2 and create an Image which gets stored in AMI (internally in EBS Snapshot)
:param context: security context
:param instance: nova.objects.instance.Instance
:param image_id: Reference to a pre-created image that will hold the snapshot.
"""
LOG.info("***** Calling SNAPSHOT *******************")
if instance['metadata']['ec2_id'] is None:
raise exception.InstanceNotRunning(instance_id=instance['uuid'])
# Adding the below line only alters the state of the instance and not
# its image in OpenStack.
update_task_state(
task_state=task_states.IMAGE_UPLOADING, expected_state=task_states.IMAGE_SNAPSHOT)
ec2_id = instance['metadata']['ec2_id']
ec_instance_info = self.ec2_conn.get_only_instances(
instance_ids=[ec2_id], filters=None, dry_run=False, max_results=None)
ec2_instance = ec_instance_info[0]
if ec2_instance.state == 'running':
ec2_image_id = ec2_instance.create_image(name=str(
image_id), description="Image from OpenStack", no_reboot=False, dry_run=False)
LOG.info("Image has been created state to %s." % ec2_image_id)
# The instance will be in pending state when it comes up, waiting forit to be in available
self._wait_for_image_state(ec2_image_id, "available")
image_api = glance.get_default_image_service()
image_ref = glance.generate_image_url(image_id)
metadata = {'is_public': False,
'location': image_ref,
'properties': {
'kernel_id': instance['kernel_id'],
'image_state': 'available',
'owner_id': instance['project_id'],
'ramdisk_id': instance['ramdisk_id'],
'ec2_image_id': ec2_image_id }
}
image_api.update(context, image_id, metadata)
def reboot(self, context, instance, network_info, reboot_type,
block_device_info=None, bad_volumes_callback=None):
"""Reboot the specified instance.
After this is called successfully, the instance's state
goes back to power_state.RUNNING. The virtualization
platform should ensure that the reboot action has completed
successfully even in cases in which the underlying domain/vm
is paused or halted/stopped.
:param instance: nova.objects.instance.Instance
:param network_info:
:py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info`
:param reboot_type: Either a HARD or SOFT reboot
:param block_device_info: Info pertaining to attached volumes
:param bad_volumes_callback: Function to handle any bad volumes
encountered
"""
if reboot_type == 'SOFT':
self._soft_reboot(
context, instance, network_info, block_device_info)
elif reboot_type == 'HARD':
self._hard_reboot(
context, instance, network_info, block_device_info)
def _soft_reboot(self, context, instance, network_info, block_device_info=None):
LOG.info("***** Calling SOFT REBOOT *******************")
ec2_id = instance['metadata']['ec2_id']
self.ec2_conn.reboot_instances(instance_ids=[ec2_id], dry_run=False)
LOG.info("Soft Reboot Complete.")
def _hard_reboot(self, context, instance, network_info, block_device_info=None):
LOG.info("***** Calling HARD REBOOT *******************")
self.power_off(instance)
self.power_on(context, instance, network_info, block_device)
LOG.info("Hard Reboot Complete.")
@staticmethod
def get_host_ip_addr():
"""Retrieves the IP address of the dom0
"""
LOG.info("***** Calling get_host_ip_addr *******************")
return CONF.my_ip
def set_admin_password(self, instance, new_pass):
"""Boto doesn't support setting the password at the time of creating an instance.
hence not implemented.
"""
pass
def inject_file(self, instance, b64_path, b64_contents):
pass
def resume_state_on_host_boot(self, context, instance, network_info,
block_device_info=None):
pass
def rescue(self, context, instance, network_info, image_meta,
rescue_password):
pass
def unrescue(self, instance, network_info):
pass
def poll_rebooting_instances(self, timeout, instances):
pass
def migrate_disk_and_power_off(self, context, instance, dest,
instance_type, network_info,
block_device_info=None):
pass
def finish_revert_migration(self, context, instance, network_info,
block_device_info=None, power_on=True):
pass
def post_live_migration_at_destination(self, context, instance,
network_info,
block_migration=False,
block_device_info=None):
pass
def power_off(self, instance):
"""Power off the specified instance.
"""
LOG.info("***** Calling POWER OFF *******************")
ec2_id = instance['metadata']['ec2_id']
self.ec2_conn.stop_instances(
instance_ids=[ec2_id], force=False, dry_run=False)
self._wait_for_state(instance, ec2_id, "stopped", power_state.SHUTDOWN)
def power_on(self, context, instance, network_info, block_device_info):
"""Power on the specified instance.
"""
LOG.info("***** Calling POWER ON *******************")
ec2_id = instance['metadata']['ec2_id']
self.ec2_conn.start_instances(instance_ids=[ec2_id], dry_run=False)
self._wait_for_state(instance, ec2_id, "running", power_state.RUNNING)
def soft_delete(self, instance):
"""Deleting the specified instance
"""
self.destroy(instance)
def restore(self, instance):
pass
def pause(self, instance):
"""Boto doesn't support pause and cannot save system state and hence we've implemented the closest functionality
which is to poweroff the instance.
:param instance: nova.objects.instance.Instance
"""
self.power_off(instance)
def unpause(self, instance):
"""Since Boto doesn't support pause and cannot save system state, we had implemented the closest functionality
which is to poweroff the instance. and powering on such an instance in this method.
:param instance: nova.objects.instance.Instance
"""
self.power_on(
context=None, instance=instance, network_info=None, block_device_info=None)
def suspend(self, instance):
"""Boto doesn't support suspend and cannot save system state and hence we've implemented the closest
functionality which is to poweroff the instance.
:param instance: nova.objects.instance.Instance
"""
self.power_off(instance)
def resume(self, context, instance, network_info, block_device_info=None):
"""Since Boto doesn't support suspend and we cannot save system state, we've implemented the closest
functionality which is to power on the instance.
:param instance: nova.objects.instance.Instance
"""
self.power_on(context, instance, network_info, block_device_info)
def destroy(self, context, instance, network_info, block_device_info=None,
destroy_disks=True, migrate_data=None):
"""Destroy the specified instance from the Hypervisor.
If the instance is not found (for example if networking failed), this
function should still succeed. It's probably a good idea to log a
warning in that case.
:param context: security context
:param instance: Instance object as returned by DB layer.
:param network_info:
:py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info`
:param block_device_info: Information about block devices that should
be detached from the instance.
:param destroy_disks: Indicates if disks should be destroyed
:param migrate_data: implementation specific params
"""
LOG.info("***** Calling DESTROY *******************")
if 'ec2_id' not in instance['metadata']:
LOG.warning(_("Key '%s' not in EC2 instances") % instance['name'], instance=instance)
return
elif 'public_ip' not in instance['metadata'] and 'public_ip_address' not in instance['metadata']:
print instance['metadata']
LOG.warning(_("Public IP is null"), instance=instance)
return
else:
# Deleting the instance from EC2
ec2_id = instance['metadata']['ec2_id']
try:
ec2_instances = self.ec2_conn.get_only_instances(instance_ids=[ec2_id])
except Exception:
return
if ec2_instances.__len__() == 0:
LOG.warning(_("EC2 instance with ID %s not found") % ec2_id, instance=instance)
return
else:
# get the elastic ip associated with the instance & disassociate
# it, and release it
elastic_ip_address = \
self.ec2_conn.get_all_addresses(addresses=instance['metadata']['public_ip_address'])[0]
LOG.info("****** Disassociating the elastic IP *********")
self.ec2_conn.disassociate_address(elastic_ip_address.public_ip)
self.ec2_conn.stop_instances(instance_ids=[ec2_id], force=True)
self.ec2_conn.terminate_instances(instance_ids=[ec2_id])
self._wait_for_state(instance, ec2_id, "terminated", power_state.SHUTDOWN)
LOG.info("****** Releasing the elastic IP ************")
self.ec2_conn.release_address(allocation_id=elastic_ip_address.allocation_id)
def attach_volume(self, context, connection_info, instance, mountpoint,
disk_bus=None, device_type=None, encryption=None):
"""Attach the disk to the instance at mountpoint using info.
"""
instance_name = instance['name']
if instance_name not in self._mounts:
self._mounts[instance_name] = {}
self._mounts[instance_name][mountpoint] = connection_info
volume_id = connection_info['data']['volume_id']
# ec2 only attaches volumes at /dev/sdf through /dev/sdp
self.ec2_conn.attach_volume(volume_map[volume_id], instance['metadata']['ec2_id'], "/dev/sdn", dry_run=False)
def detach_volume(self, connection_info, instance, mountpoint, encryption=None):
"""Detach the disk attached to the instance.
"""
try:
del self._mounts[instance['name']][mountpoint]
except KeyError:
pass
volume_id = connection_info['data']['volume_id']
self.ec2_conn.detach_volume(volume_map[volume_id], instance_id=instance['metadata']['ec2_id'],
device="/dev/sdn", force=False, dry_run=False)
def swap_volume(self, old_connection_info, new_connection_info,
instance, mountpoint):
"""Replace the disk attached to the instance.
"""
instance_name = instance['name']
if instance_name not in self._mounts:
self._mounts[instance_name] = {}
self._mounts[instance_name][mountpoint] = new_connection_info
old_volume_id = old_connection_info['data']['volume_id']
new_volume_id = new_connection_info['data']['volume_id']
self.detach_volume(old_connection_info, instance, mountpoint)
# wait for the old volume to detach successfully to make sure
# /dev/sdn is available for the new volume to be attached
time.sleep(60)
self.ec2_conn.attach_volume(volume_map[new_volume_id], instance['metadata']['ec2_id'], "/dev/sdn",
dry_run=False)
return True
def attach_interface(self, instance, image_meta, vif):
if vif['id'] in self._interfaces:
raise exception.InterfaceAttachFailed('duplicate')
self._interfaces[vif['id']] = vif
def detach_interface(self, instance, vif):
try:
del self._interfaces[vif['id']]
except KeyError:
raise exception.InterfaceDetachFailed('not attached')
def get_info(self, instance):
"""Get the current status of an instance, by name (not ID!)
:param instance: nova.objects.instance.Instance object
Returns a dict containing:
:state: the running state, one of the power_state codes
:max_mem: (int) the maximum memory in KBytes allowed
:mem: (int) the memory in KBytes used by the domain
:num_cpu: (int) the number of virtual CPUs for the domain
:cpu_time: (int) the CPU time used in nanoseconds
"""
LOG.info("*************** GET INFO ********************")
if 'metadata' not in instance or 'ec2_id' not in instance['metadata']:
raise exception.InstanceNotFound(instance_id=instance['name'])
ec2_id = instance['metadata']['ec2_id']
ec2_instances = self.ec2_conn.get_only_instances(instance_ids=[ec2_id], filters=None, dry_run=False,
max_results=None)
if ec2_instances.__len__() == 0:
LOG.warning(_("EC2 instance with ID %s not found") % ec2_id, instance=instance)
raise exception.InstanceNotFound(instance_id=instance['name'])
ec2_instance = ec2_instances[0]
LOG.info(ec2_instance)
LOG.info("state %s max_mem %s mem %s flavor %s" %
(EC2_STATE_MAP.get(ec2_instance.state), ec2_instance.ramdisk, ec2_instance.get_attribute('ramdisk', dry_run=False), ec2_instance.instance_type))
return {'state': EC2_STATE_MAP.get(ec2_instance.state),
'max_mem': ec2_instance.ramdisk,
'mem': ec2_instance.get_attribute('ramdisk', dry_run=False),
'num_cpu': 2,
'cpu_time': 0}
def allow_key(self, key):
for key_to_filter in DIAGNOSTIC_KEYS_TO_FILTER:
if key == key_to_filter:
return False
return True
def get_diagnostics(self, instance_name):
"""Return data about VM diagnostics.
"""
LOG.info("******* GET DIAGNOSTICS *********************************************")
instance = self.nova.servers.get(instance_name)
ec2_id = instance.metadata['ec2_id']
ec2_instances = self.ec2_conn.get_only_instances(instance_ids=[ec2_id], filters=None, dry_run=False,
max_results=None)
if ec2_instances.__len__() == 0:
LOG.warning(_("EC2 instance with ID %s not found") % ec2_id, instance=instance)
raise exception.InstanceNotFound(instance_id=instance['name'])
ec2_instance = ec2_instances[0]
diagnostics = {}
for key, value in ec2_instance.__dict__.items():
if self.allow_key(key):
diagnostics['instance.' + key] = str(value)
metrics = self.cloudwatch_conn.list_metrics(dimensions={'InstanceId': ec2_id})
import datetime
for metric in metrics:
end = datetime.datetime.utcnow()
start = end - datetime.timedelta(hours=1)
details = metric.query(start, end, 'Average', None, 3600)
if len(details) > 0:
diagnostics['metrics.' + str(metric)] = details[0]
return diagnostics
def get_all_bw_counters(self, instances):
"""Return bandwidth usage counters for each interface on each
running VM.
"""
bw = []
return bw
def get_all_volume_usage(self, context, compute_host_bdms):
"""Return usage info for volumes attached to vms on
a given host.
"""
volusage = []
return volusage
def block_stats(self, instance_name, disk_id):
return [0L, 0L, 0L, 0L, None]
def interface_stats(self, instance_name, iface_id):
return [0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L]
def get_console_output(self, instance):
return 'EC2 CONSOLE OUTPUT\nANOTHER\nLAST LINE'
def get_vnc_console(self, instance):
return {'internal_access_path': 'EC2',
'host': 'EC2vncconsole.com',
'port': 6969}
def get_spice_console(self, instance):
""" Simple Protocol for Independent Computing Environments
Doesn't seem to be supported by AWS EC2 directly
"""
return {'internal_access_path': 'EC2',
'host': 'EC2spiceconsole.com',
'port': 6969,
'tlsPort': 6970}
def get_console_pool_info(self, console_type):
return {'address': '127.0.0.1',
'username': '******',
'password': '******'}
def _get_ec2_instance_ids_with_security_group(self, ec2_security_group):
return [instance.id for instance in ec2_security_group.instances()]
def _get_openstack_instances_with_security_group(self, openstack_security_group):
return [instance for instance in (self.nova.servers.list())
if openstack_security_group.name in [group['name'] for group in instance.security_groups]]
def _get_id_of_ec2_instance_to_update_security_group(self, ec2_instance_ids_for_security_group,
ec2_ids_for_openstack_instances_for_security_group):
return (set(ec2_ids_for_openstack_instances_for_security_group).symmetric_difference(
set(ec2_instance_ids_for_security_group))).pop()
def _should_add_security_group_to_instance(self, ec2_instance_ids_for_security_group,
ec2_ids_for_openstack_instances_for_security_group):
return len(ec2_instance_ids_for_security_group) < len(ec2_ids_for_openstack_instances_for_security_group)
def _add_security_group_to_instance(self, ec2_instance_id, ec2_security_group):
security_group_ids_for_instance = self._get_ec2_security_group_ids_for_instance(ec2_instance_id)
security_group_ids_for_instance.append(ec2_security_group.id)
self.ec2_conn.modify_instance_attribute(ec2_instance_id, "groupSet", security_group_ids_for_instance)
def _remove_security_group_from_instance(self, ec2_instance_id, ec2_security_group):
security_group_ids_for_instance = self._get_ec2_security_group_ids_for_instance(ec2_instance_id)
security_group_ids_for_instance.remove(ec2_security_group.id)
self.ec2_conn.modify_instance_attribute(ec2_instance_id, "groupSet", security_group_ids_for_instance)
def _get_ec2_security_group_ids_for_instance(self, ec2_instance_id):
security_groups_for_instance = self.ec2_conn.get_instance_attribute(ec2_instance_id, "groupSet")['groupSet']
security_group_ids_for_instance = [group.id for group in security_groups_for_instance]
return security_group_ids_for_instance
def _get_or_create_ec2_security_group(self, openstack_security_group):
try:
return self.ec2_conn.get_all_security_groups(openstack_security_group.name)[0]
except (EC2ResponseError, IndexError) as e:
LOG.warning(e)
return self.ec2_conn.create_security_group(openstack_security_group.name,
openstack_security_group.description)
def refresh_security_group_rules(self, security_group_id):
"""This method is called after a change to security groups.
All security groups and their associated rules live in the datastore,
and calling this method should apply the updated rules to instances
running the specified security group.
An error should be raised if the operation cannot complete.
"""
LOG.info("************** REFRESH SECURITY GROUP RULES ******************")
openstack_security_group = self.nova. security_groups.get(security_group_id)
ec2_security_group = self._get_or_create_ec2_security_group(openstack_security_group)
ec2_ids_for_ec2_instances_with_security_group = self._get_ec2_instance_ids_with_security_group(
ec2_security_group)
ec2_ids_for_openstack_instances_with_security_group = [
instance.metadata['ec2_id'] for instance
in self._get_openstack_instances_with_security_group(openstack_security_group)
]
self.security_group_lock.acquire()
try:
ec2_instance_to_update = self._get_id_of_ec2_instance_to_update_security_group(
ec2_ids_for_ec2_instances_with_security_group,
ec2_ids_for_openstack_instances_with_security_group
)
should_add_security_group = self._should_add_security_group_to_instance(
ec2_ids_for_ec2_instances_with_security_group,
ec2_ids_for_openstack_instances_with_security_group)
if should_add_security_group:
self._add_security_group_to_instance(ec2_instance_to_update, ec2_security_group)
else:
self._remove_security_group_from_instance(ec2_instance_to_update, ec2_security_group)
finally:
self.security_group_lock.release()
return True
def refresh_security_group_members(self, security_group_id):
LOG.info("************** REFRESH SECURITY GROUP MEMBERS ******************")
LOG.info(security_group_id)
return True
def _get_allowed_group_name_from_openstack_rule_if_present(self, openstack_rule):
return openstack_rule['group']['name'] if 'name' in openstack_rule['group'] else None
def _get_allowed_ip_range_from_openstack_rule_if_present(self, openstack_rule):
return openstack_rule['ip_range']['cidr'] if 'cidr' in openstack_rule['ip_range'] else None
def refresh_instance_security_rules(self, instance):
LOG.info("************** REFRESH INSTANCE SECURITY RULES ******************")
LOG.info(instance)
# TODO: lock for case when group is associated with multiple instances
self.instance_rule_refresher.refresh(self.nova.servers.get(instance['id']))
return
def refresh_provider_fw_rules(self):
pass
def get_available_resource(self, nodename):
"""Retrieve resource information.
Updates compute manager resource info on ComputeNode table.
This method is called when nova-compute launches and as part of a periodic task that records results in the DB.
Since we don't have a real hypervisor, pretend we have lots of disk and ram.
:param nodename:
node which the caller want to get resources from
a driver that manages only one node can safely ignore this
:returns: Dictionary describing resources
"""
LOG.info("************** GET_AVAILABLE_RESOURCE ******************")
if nodename not in _EC2_NODES:
return {}
dic = {'vcpus': VCPUS,
'memory_mb': MEMORY_IN_MBS,
'local_gb': DISK_IN_GB,
'vcpus_used': 0,
'memory_mb_used': 0,
'local_gb_used': 0,
'hypervisor_type': 'EC2',
'hypervisor_version': '1.0',
'hypervisor_hostname': nodename,
'disk_available_least': 0,
'cpu_info': '?'}
return dic
def ensure_filtering_rules_for_instance(self, instance_ref, network_info):
return
def get_instance_disk_info(self, instance_name):
return
def live_migration(self, context, instance_ref, dest,
post_method, recover_method, block_migration=False,
migrate_data=None):
post_method(context, instance_ref, dest, block_migration,
migrate_data)
return
def check_can_live_migrate_destination_cleanup(self, ctxt,
dest_check_data):
return
def check_can_live_migrate_destination(self, ctxt, instance_ref,
src_compute_info, dst_compute_info,
block_migration=False,
disk_over_commit=False):
return {}
def check_can_live_migrate_source(self, ctxt, instance_ref,
dest_check_data):
return
def finish_migration(self, context, migration, instance, disk_info,
network_info, image_meta, resize_instance,
block_device_info=None, power_on=True):
"""Completes a resize
:param migration: the migrate/resize information
:param instance: nova.objects.instance.Instance being migrated/resized
:param power_on: is True the instance should be powered on
"""
LOG.info("***** Calling FINISH MIGRATION *******************")
ec2_id = instance['metadata']['ec2_id']
ec_instance_info = self.ec2_conn.get_only_instances(
instance_ids=[ec2_id], filters=None, dry_run=False, max_results=None)
ec2_instance = ec_instance_info[0]
# EC2 instance needs to be stopped to modify it's attribute. So we stop the instance,
# modify the instance type in this case, and then restart the instance.
ec2_instance.stop()
self._wait_for_state(instance, ec2_id, "stopped", power_state.SHUTDOWN)
new_instance_type = flavor_map[migration['new_instance_type_id']]
ec2_instance.modify_attribute('instanceType', new_instance_type)
def confirm_migration(self, migration, instance, network_info):
"""Confirms a resize, destroying the source VM.
:param instance: nova.objects.instance.Instance
"""
LOG.info("***** Calling CONFIRM MIGRATION *******************")
ec2_id = instance['metadata']['ec2_id']
ec_instance_info = self.ec2_conn.get_only_instances(
instance_ids=[ec2_id], filters=None, dry_run=False, max_results=None)
ec2_instance = ec_instance_info[0]
ec2_instance.start()
self._wait_for_state(instance, ec2_id, "running", power_state.RUNNING)
def pre_live_migration(self, context, instance_ref, block_device_info,
network_info, disk, migrate_data=None):
return
def unfilter_instance(self, instance_ref, network_info):
return
def get_host_stats(self, refresh=False):
"""Return EC2 Host Status of name, ram, disk, network."""
stats = []
for nodename in _EC2_NODES:
host_status = self.host_status_base.copy()
host_status['hypervisor_hostname'] = nodename
host_status['host_hostname'] = nodename
host_status['host_name_label'] = nodename
host_status['hypervisor_type'] = 'Amazon-EC2'
host_status['vcpus'] = VCPUS
host_status['memory_mb'] = MEMORY_IN_MBS
host_status['local_gb'] = DISK_IN_GB
stats.append(host_status)
if len(stats) == 0:
raise exception.NovaException("EC2Driver has no node")
elif len(stats) == 1:
return stats[0]
else:
return stats
def host_power_action(self, host, action):
"""Reboots, shuts down or powers up the host."""
return action
def host_maintenance_mode(self, host, mode):
"""Start/Stop host maintenance window. On start, it triggers
guest VMs evacuation.
"""
if not mode:
return 'off_maintenance'
return 'on_maintenance'
def set_host_enabled(self, host, enabled):
"""Sets the specified host's ability to accept new instances."""
if enabled:
return 'enabled'
return 'disabled'
def get_disk_available_least(self):
pass
def add_to_aggregate(self, context, aggregate, host, **kwargs):
pass
def remove_from_aggregate(self, context, aggregate, host, **kwargs):
pass
def get_volume_connector(self, instance):
return {'ip': '127.0.0.1', 'initiator': 'EC2', 'host': 'EC2host'}
def get_available_nodes(self, refresh=False):
return _EC2_NODES
def instance_on_disk(self, instance):
return False
def list_instance_uuids(self):
return []
def _wait_for_state(self, instance, ec2_id, desired_state, desired_power_state):
"""Wait for the state of the corrosponding ec2 instance to be in completely available state.
:params:ec2_id: the instance's corrosponding ec2 id.
:params:desired_state: the desired state of the instance to be in.
"""
def _wait_for_power_state():
"""Called at an interval until the VM is running again.
"""
ec2_instance = self.ec2_conn.get_only_instances(instance_ids=[ec2_id])
state = ec2_instance[0].state
if state == desired_state:
LOG.info("Instance has changed state to %s." % desired_state)
raise loopingcall.LoopingCallDone()
def _wait_for_status_check():
"""Power state of a machine might be ON, but status check is the one which gives the real
"""
ec2_instance = self.ec2_conn.get_all_instance_status(instance_ids=[ec2_id])[0]
if ec2_instance.system_status.status == 'ok':
LOG.info("Instance status check is %s / %s" %
(ec2_instance.system_status.status, ec2_instance.instance_status.status))
raise loopingcall.LoopingCallDone()
#waiting for the power state to change
timer = loopingcall.FixedIntervalLoopingCall(_wait_for_power_state)
timer.start(interval=1).wait()
#waiting for the status of the machine to be in running
if desired_state == 'running':
timer = loopingcall.FixedIntervalLoopingCall(_wait_for_status_check)
timer.start(interval=0.5).wait()
def _wait_for_image_state(self, ami_id, desired_state):
"""Timer to wait for the image/snapshot to reach a desired state
:params:ami_id: correspoding image id in Amazon
:params:desired_state: the desired new state of the image to be in.
"""
def _wait_for_state():
"""Called at an interval until the AMI image is available."""
try:
images = self.ec2_conn.get_all_images(image_ids=[ami_id], owners=None,
executable_by=None, filters=None, dry_run=None)
state = images[0].state
# LOG.info("\n\n\nImage id = %s" % ami_id + ", state = %s\n\n\n" % state)
if state == desired_state:
LOG.info("Image has changed state to %s." % desired_state)
raise loopingcall.LoopingCallDone()
except boto_exc.EC2ResponseError:
pass
timer = loopingcall.FixedIntervalLoopingCall(_wait_for_state)
timer.start(interval=0.5).wait()
