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OpenStack Study: driver.py**** CubicPower OpenStack Study ****
# Copyright 2011 Justin Santa Barbara # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. """ Driver base-classes: (Beginning of) the contract that compute drivers must follow, and shared types that support that contract """ import sys from oslo.config import cfg from nova.openstack.common.gettextutils import _ from nova.openstack.common import importutils from nova.openstack.common import log as logging from nova import utils from nova.virt import event as virtevent driver_opts = [ cfg.StrOpt('compute_driver', help='Driver to use for controlling virtualization. Options ' 'include: libvirt.LibvirtDriver, xenapi.XenAPIDriver, ' 'fake.FakeDriver, baremetal.BareMetalDriver, ' 'vmwareapi.VMwareESXDriver, vmwareapi.VMwareVCDriver'), cfg.StrOpt('default_ephemeral_format', help='The default format an ephemeral_volume will be ' 'formatted with on creation.'), cfg.StrOpt('preallocate_images', default='none', help='VM image preallocation mode: ' '"none" => no storage provisioning is done up front, ' '"space" => storage is fully allocated at instance start'), cfg.BoolOpt('use_cow_images', default=True, help='Whether to use cow images'), cfg.BoolOpt('vif_plugging_is_fatal', default=True, help="Fail instance boot if vif plugging fails"), cfg.IntOpt('vif_plugging_timeout', default=300, help='Number of seconds to wait for neutron vif plugging ' 'events to arrive before continuing or failing (see ' 'vif_plugging_is_fatal). If this is set to zero and ' 'vif_plugging_is_fatal is False, events should not ' 'be expected to arrive at all.'), ] CONF = cfg.CONF CONF.register_opts(driver_opts) LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** def driver_dict_from_config(named_driver_config, *args, **kwargs): driver_registry = dict() for driver_str in named_driver_config: driver_type, _sep, driver = driver_str.partition('=') driver_class = importutils.import_class(driver) driver_registry[driver_type] = driver_class(*args, **kwargs) return driver_registry
**** CubicPower OpenStack Study **** def block_device_info_get_root(block_device_info): block_device_info = block_device_info or {} return block_device_info.get('root_device_name')
**** CubicPower OpenStack Study **** def block_device_info_get_swap(block_device_info): block_device_info = block_device_info or {} return block_device_info.get('swap') or {'device_name': None, 'swap_size': 0}
**** CubicPower OpenStack Study **** def swap_is_usable(swap): return swap and swap['device_name'] and swap['swap_size'] > 0
**** CubicPower OpenStack Study **** def block_device_info_get_ephemerals(block_device_info): block_device_info = block_device_info or {} ephemerals = block_device_info.get('ephemerals') or [] return ephemerals
**** CubicPower OpenStack Study **** def block_device_info_get_mapping(block_device_info): block_device_info = block_device_info or {} block_device_mapping = block_device_info.get('block_device_mapping') or [] return block_device_mapping
**** CubicPower OpenStack Study **** class ComputeDriver(object): """Base class for compute drivers. The interface to this class talks in terms of 'instances' (Amazon EC2 and internal Nova terminology), by which we mean 'running virtual machine' (XenAPI terminology) or domain (Xen or libvirt terminology). An instance has an ID, which is the identifier chosen by Nova to represent the instance further up the stack. This is unfortunately also called a 'name' elsewhere. As far as this layer is concerned, 'instance ID' and 'instance name' are synonyms. Note that the instance ID or name is not human-readable or customer-controlled -- it's an internal ID chosen by Nova. At the nova.virt layer, instances do not have human-readable names at all -- such things are only known higher up the stack. Most virtualization platforms will also have their own identity schemes, to uniquely identify a VM or domain. These IDs must stay internal to the platform-specific layer, and never escape the connection interface. The platform-specific layer is responsible for keeping track of which instance ID maps to which platform-specific ID, and vice versa. Some methods here take an instance of nova.compute.service.Instance. This is the data structure used by nova.compute to store details regarding an instance, and pass them into this layer. This layer is responsible for translating that generic data structure into terms that are specific to the virtualization platform. """ capabilities = { "has_imagecache": False, "supports_recreate": False, }
**** CubicPower OpenStack Study **** def __init__(self, virtapi): self.virtapi = virtapi self._compute_event_callback = None
**** CubicPower OpenStack Study **** 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. """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def cleanup_host(self, host): """Clean up anything that is necessary for the driver gracefully stop, including ending remote sessions. This is optional. """ pass
**** CubicPower OpenStack Study **** 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 """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_num_instances(self): """Return the total number of virtual machines. Return the number of virtual machines that the hypervisor knows about. .. note:: This implementation works for all drivers, but it is not particularly efficient. Maintainers of the virt drivers are encouraged to override this method with something more efficient. """ return len(self.list_instances())
**** CubicPower OpenStack Study **** def instance_exists(self, instance_id): """Checks existence of an instance on the host. :param instance_id: The ID / name of the instance to lookup Returns True if an instance with the supplied ID exists on the host, False otherwise. .. note:: This implementation works for all drivers, but it is not particularly efficient. Maintainers of the virt drivers are encouraged to override this method with something more efficient. """ return instance_id in self.list_instances()
**** CubicPower OpenStack Study **** def estimate_instance_overhead(self, instance_info): """Estimate the virtualization overhead required to build an instance of the given flavor. Defaults to zero, drivers should override if per-instance overhead calculations are desired. :param instance_info: Instance/flavor to calculate overhead for. :returns: Dict of estimated overhead values. """ return {'memory_mb': 0}
**** CubicPower OpenStack Study **** def list_instances(self): """Return the names of all the instances known to the virtualization layer, as a list. """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def list_instance_uuids(self): """Return the UUIDS of all the instances known to the virtualization layer, as a list. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def rebuild(self, context, instance, image_meta, injected_files, admin_password, bdms, detach_block_devices, attach_block_devices, network_info=None, recreate=False, block_device_info=None, preserve_ephemeral=False): """Destroy and re-make this instance. A 'rebuild' effectively purges all existing data from the system and remakes the VM with given 'metadata' and 'personalities'. This base class method shuts down the VM, detaches all block devices, then spins up the new VM afterwards. It may be overridden by hypervisors that need to - e.g. for optimisations, or when the 'VM' is actually proxied and needs to be held across the shutdown + spin up steps. :param context: security context :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: Administrator password to set in instance. :param bdms: block-device-mappings to use for rebuild :param detach_block_devices: function to detach block devices. See nova.compute.manager.ComputeManager:_rebuild_default_impl for usage. :param attach_block_devices: function to attach block devices. See nova.compute.manager.ComputeManager:_rebuild_default_impl for usage. :param network_info: :py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info` :param recreate: True if the instance is being recreated on a new hypervisor - all the cleanup of old state is skipped. :param block_device_info: Information about block devices to be attached to the instance. :param preserve_ephemeral: True if the default ephemeral storage partition must be preserved on rebuild """ raise NotImplementedError()
**** CubicPower OpenStack Study **** 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 :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: Administrator password to set in instance. :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. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def destroy(self, context, instance, network_info, block_device_info=None, destroy_disks=True): """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 """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def cleanup(self, context, instance, network_info, block_device_info=None, destroy_disks=True): """Cleanup the instance resources . Instance should have been destroyed from the Hypervisor before calling this method. :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 """ raise NotImplementedError()
**** CubicPower OpenStack Study **** 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 """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_console_pool_info(self, console_type): # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_console_output(self, context, instance): """Get console output for an instance :param context: security context :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_vnc_console(self, context, instance): """Get connection info for a vnc console. :param context: security context :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_spice_console(self, context, instance): """Get connection info for a spice console. :param context: security context :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_rdp_console(self, context, instance): """Get connection info for a rdp console. :param context: security context :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_diagnostics(self, instance): """Return data about VM diagnostics. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_all_bw_counters(self, instances): """Return bandwidth usage counters for each interface on each running VM. :param instances: nova.objects.instance.InstanceList """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_all_volume_usage(self, context, compute_host_bdms): """Return usage info for volumes attached to vms on a given host.- """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_host_ip_addr(self): """Retrieves the IP address of the dom0 """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** 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.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def detach_volume(self, connection_info, instance, mountpoint, encryption=None): """Detach the disk attached to the instance.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def swap_volume(self, old_connection_info, new_connection_info, instance, mountpoint): """Replace the disk attached to the instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def attach_interface(self, instance, image_meta, vif): """Attach an interface to the instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def detach_interface(self, instance, vif): """Detach an interface from the instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def migrate_disk_and_power_off(self, context, instance, dest, flavor, network_info, block_device_info=None): """Transfers the disk of a running instance in multiple phases, turning off the instance before the end. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def snapshot(self, context, instance, image_id, update_task_state): """Snapshots the specified instance. :param context: security context :param instance: nova.objects.instance.Instance :param image_id: Reference to a pre-created image that will hold the snapshot. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** 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 context: the context for the migration/resize :param migration: the migrate/resize information :param instance: nova.objects.instance.Instance being migrated/resized :param disk_info: the newly transferred disk information :param network_info: :py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info` :param image_meta: image object returned by nova.image.glance that defines the image from which this instance was created :param resize_instance: True if the instance is being resized, False otherwise :param block_device_info: instance volume block device info :param power_on: True if the instance should be powered on, False otherwise """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def confirm_migration(self, migration, instance, network_info): """Confirms a resize, destroying the source VM. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def finish_revert_migration(self, context, instance, network_info, block_device_info=None, power_on=True): """Finish reverting a resize. :param context: the context for the finish_revert_migration :param instance: nova.objects.instance.Instance being migrated/resized :param network_info: :py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info` :param block_device_info: instance volume block device info :param power_on: True if the instance should be powered on, False otherwise """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def pause(self, instance): """Pause the specified instance. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def unpause(self, instance): """Unpause paused VM instance. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def suspend(self, instance): """suspend the specified instance. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def resume(self, context, instance, network_info, block_device_info=None): """resume the specified instance. :param context: the context for the resume :param instance: nova.objects.instance.Instance being resumed :param network_info: :py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info` :param block_device_info: instance volume block device info """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def resume_state_on_host_boot(self, context, instance, network_info, block_device_info=None): """resume guest state when a host is booted. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def rescue(self, context, instance, network_info, image_meta, rescue_password): """Rescue the specified instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def set_bootable(self, instance, is_bootable): """Set the ability to power on/off an instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def unrescue(self, instance, network_info): """Unrescue the specified instance. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def power_off(self, instance): """Power off the specified instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def power_on(self, context, instance, network_info, block_device_info=None): """Power on the specified instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def soft_delete(self, instance): """Soft delete the specified instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def restore(self, instance): """Restore the specified instance. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_available_resource(self, nodename): """Retrieve resource information. This method is called when nova-compute launches, and as part of a periodic task that records the results in the DB. :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 """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def pre_live_migration(self, ctxt, instance, block_device_info, network_info, disk_info, migrate_data=None): """Prepare an instance for live migration :param ctxt: security context :param instance: nova.objects.instance.Instance object :param block_device_info: instance block device information :param network_info: instance network information :param disk_info: instance disk information :param migrate_data: implementation specific data dict. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def live_migration(self, ctxt, instance_ref, dest, post_method, recover_method, block_migration=False, migrate_data=None): """Live migration of an instance to another host. :param ctxt: security context :param instance_ref: nova.db.sqlalchemy.models.Instance object instance object that is migrated. :param dest: destination host :param post_method: post operation method. expected nova.compute.manager.post_live_migration. :param recover_method: recovery method when any exception occurs. expected nova.compute.manager.recover_live_migration. :param block_migration: if true, migrate VM disk. :param migrate_data: implementation specific params. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def rollback_live_migration_at_destination(self, ctxt, instance_ref, network_info, block_device_info): """Clean up destination node after a failed live migration. :param ctxt: security context :param instance_ref: instance object that was being migrated :param network_info: instance network information :param block_device_info: instance block device information """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def post_live_migration(self, ctxt, instance_ref, block_device_info, migrate_data=None): """Post operation of live migration at source host. :param ctxt: security context :instance_ref: instance object that was migrated :block_device_info: instance block device information :param migrate_data: if not None, it is a dict which has data """ pass
**** CubicPower OpenStack Study **** def post_live_migration_at_destination(self, ctxt, instance_ref, network_info, block_migration=False, block_device_info=None): """Post operation of live migration at destination host. :param ctxt: security context :param instance_ref: instance object that is migrated :param network_info: instance network information :param block_migration: if true, post operation of block_migration. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def check_instance_shared_storage_local(self, ctxt, instance): """Check if instance files located on shared storage. This runs check on the destination host, and then calls back to the source host to check the results. :param ctxt: security context :param instance: nova.db.sqlalchemy.models.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def check_instance_shared_storage_remote(self, ctxt, data): """Check if instance files located on shared storage. :param context: security context :param data: result of check_instance_shared_storage_local """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def check_instance_shared_storage_cleanup(self, ctxt, data): """Do cleanup on host after check_instance_shared_storage calls :param ctxt: security context :param data: result of check_instance_shared_storage_local """ pass
**** CubicPower OpenStack Study **** def check_can_live_migrate_destination(self, ctxt, instance_ref, src_compute_info, dst_compute_info, block_migration=False, disk_over_commit=False): """Check if it is possible to execute live migration. This runs checks on the destination host, and then calls back to the source host to check the results. :param ctxt: security context :param instance_ref: nova.db.sqlalchemy.models.Instance :param src_compute_info: Info about the sending machine :param dst_compute_info: Info about the receiving machine :param block_migration: if true, prepare for block migration :param disk_over_commit: if true, allow disk over commit :returns: a dict containing migration info (hypervisor-dependent) """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def check_can_live_migrate_destination_cleanup(self, ctxt, dest_check_data): """Do required cleanup on dest host after check_can_live_migrate calls :param ctxt: security context :param dest_check_data: result of check_can_live_migrate_destination """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def check_can_live_migrate_source(self, ctxt, instance_ref, dest_check_data): """Check if it is possible to execute live migration. This checks if the live migration can succeed, based on the results from check_can_live_migrate_destination. :param context: security context :param instance_ref: nova.db.sqlalchemy.models.Instance :param dest_check_data: result of check_can_live_migrate_destination :returns: a dict containing migration info (hypervisor-dependent) """ raise NotImplementedError()
**** CubicPower OpenStack Study **** 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. """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def refresh_security_group_members(self, security_group_id): """This method is called when a security group is added to an instance. This message is sent to the virtualization drivers on hosts that are running an instance that belongs to a security group that has a rule that references the security group identified by `security_group_id`. It is the responsibility of this method to make sure any rules that authorize traffic flow with members of the security group are updated and any new members can communicate, and any removed members cannot. Scenario: * we are running on host 'H0' and we have an instance 'i-0'. * instance 'i-0' is a member of security group 'speaks-b' * group 'speaks-b' has an ingress rule that authorizes group 'b' * another host 'H1' runs an instance 'i-1' * instance 'i-1' is a member of security group 'b' When 'i-1' launches or terminates we will receive the message to update members of group 'b', at which time we will make any changes needed to the rules for instance 'i-0' to allow or deny traffic coming from 'i-1', depending on if it is being added or removed from the group. In this scenario, 'i-1' could just as easily have been running on our host 'H0' and this method would still have been called. The point was that this method isn't called on the host where instances of that group are running (as is the case with :py:meth:`refresh_security_group_rules`) but is called where references are made to authorizing those instances. An error should be raised if the operation cannot complete. """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def refresh_provider_fw_rules(self): """This triggers a firewall update based on database changes. When this is called, rules have either been added or removed from the datastore. You can retrieve rules with :py:meth:`nova.db.provider_fw_rule_get_all`. Provider rules take precedence over security group rules. If an IP would be allowed by a security group ingress rule, but blocked by a provider rule, then packets from the IP are dropped. This includes intra-project traffic in the case of the allow_project_net_traffic flag for the libvirt-derived classes. """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def refresh_instance_security_rules(self, instance): """Refresh security group rules Gets called when an instance gets added to or removed from the security group the instance is a member of or if the group gains or loses a rule. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def reset_network(self, instance): """reset networking for specified instance.""" # TODO(Vek): Need to pass context in for access to auth_token pass
**** CubicPower OpenStack Study **** def ensure_filtering_rules_for_instance(self, instance, network_info): """Setting up filtering rules and waiting for its completion. To migrate an instance, filtering rules to hypervisors and firewalls are inevitable on destination host. ( Waiting only for filtering rules to hypervisor, since filtering rules to firewall rules can be set faster). Concretely, the below method must be called. - setup_basic_filtering (for nova-basic, etc.) - prepare_instance_filter(for nova-instance-instance-xxx, etc.) to_xml may have to be called since it defines PROJNET, PROJMASK. but libvirt migrates those value through migrateToURI(), so , no need to be called. Don't use thread for this method since migration should not be started when setting-up filtering rules operations are not completed. :param instance: nova.objects.instance.Instance object """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def filter_defer_apply_on(self): """Defer application of IPTables rules.""" pass
**** CubicPower OpenStack Study **** def filter_defer_apply_off(self): """Turn off deferral of IPTables rules and apply the rules now.""" pass
**** CubicPower OpenStack Study **** def unfilter_instance(self, instance, network_info): """Stop filtering instance.""" # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def set_admin_password(self, context, instance, new_pass=None): """Set the root password on the specified instance. :param instance: nova.objects.instance.Instance :param new_password: the new password """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def inject_file(self, instance, b64_path, b64_contents): """Writes a file on the specified instance. The first parameter is an instance of nova.compute.service.Instance, and so the instance is being specified as instance.name. The second parameter is the base64-encoded path to which the file is to be written on the instance; the third is the contents of the file, also base64-encoded. NOTE(russellb) This method is deprecated and will be removed once it can be removed from nova.compute.manager. """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def change_instance_metadata(self, context, instance, diff): """Applies a diff to the instance metadata. This is an optional driver method which is used to publish changes to the instance's metadata to the hypervisor. If the hypervisor has no means of publishing the instance metadata to the instance, then this method should not be implemented. :param context: security context :param instance: nova.objects.instance.Instance """ pass
**** CubicPower OpenStack Study **** def inject_network_info(self, instance, nw_info): """inject network info for specified instance.""" # TODO(Vek): Need to pass context in for access to auth_token pass
**** CubicPower OpenStack Study **** def poll_rebooting_instances(self, timeout, instances): """Poll for rebooting instances :param timeout: the currently configured timeout for considering rebooting instances to be stuck :param instances: instances that have been in rebooting state longer than the configured timeout """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def host_power_action(self, host, action): """Reboots, shuts down or powers up the host.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def host_maintenance_mode(self, host, mode): """Start/Stop host maintenance window. On start, it triggers guest VMs evacuation. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def set_host_enabled(self, host, enabled): """Sets the specified host's ability to accept new instances.""" # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_host_uptime(self, host): """Returns the result of calling "uptime" on the target host.""" # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def plug_vifs(self, instance, network_info): """Plug VIFs into networks. :param instance: nova.objects.instance.Instance """ # TODO(Vek): Need to pass context in for access to auth_token raise NotImplementedError()
**** CubicPower OpenStack Study **** def unplug_vifs(self, instance, network_info): """Unplug VIFs from networks. :param instance: nova.objects.instance.Instance """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_host_stats(self, refresh=False): """Return currently known host stats. If the hypervisor supports pci passthrough, the returned dictionary includes a key-value pair for it. The key of pci passthrough device is "pci_passthrough_devices" and the value is a json string for the list of assignable pci devices. Each device is a dictionary, with mandatory keys of 'address', 'vendor_id', 'product_id', 'dev_type', 'dev_id', 'label' and other optional device specific information. Refer to the objects/pci_device.py for more idea of these keys. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_host_cpu_stats(self): """Get the currently known host CPU stats. :returns: a dict containing the CPU stat info, eg: {'kernel': kern, 'idle': idle, 'user': user, 'iowait': wait, 'frequency': freq}, where kern and user indicate the cumulative CPU time (nanoseconds) spent by kernel and user processes respectively, idle indicates the cumulative idle CPU time (nanoseconds), wait indicates the cumulative I/O wait CPU time (nanoseconds), since the host is booting up; freq indicates the current CPU frequency (MHz). All values are long integers. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def block_stats(self, instance_name, disk_id): """Return performance counters associated with the given disk_id on the given instance_name. These are returned as [rd_req, rd_bytes, wr_req, wr_bytes, errs], where rd indicates read, wr indicates write, req is the total number of I/O requests made, bytes is the total number of bytes transferred, and errs is the number of requests held up due to a full pipeline. All counters are long integers. This method is optional. On some platforms (e.g. XenAPI) performance statistics can be retrieved directly in aggregate form, without Nova having to do the aggregation. On those platforms, this method is unused. Note that this function takes an instance ID. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def interface_stats(self, instance_name, iface_id): """Return performance counters associated with the given iface_id on the given instance_id. These are returned as [rx_bytes, rx_packets, rx_errs, rx_drop, tx_bytes, tx_packets, tx_errs, tx_drop], where rx indicates receive, tx indicates transmit, bytes and packets indicate the total number of bytes or packets transferred, and errs and dropped is the total number of packets failed / dropped. All counters are long integers. This method is optional. On some platforms (e.g. XenAPI) performance statistics can be retrieved directly in aggregate form, without Nova having to do the aggregation. On those platforms, this method is unused. Note that this function takes an instance ID. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def macs_for_instance(self, instance): """What MAC addresses must this instance have? Some hypervisors (such as bare metal) cannot do freeform virtualisation of MAC addresses. This method allows drivers to return a set of MAC addresses that the instance is to have. allocate_for_instance will take this into consideration when provisioning networking for the instance. Mapping of MAC addresses to actual networks (or permitting them to be freeform) is up to the network implementation layer. For instance, with openflow switches, fixed MAC addresses can still be virtualised onto any L2 domain, with arbitrary VLANs etc, but regular switches require pre-configured MAC->network mappings that will match the actual configuration. Most hypervisors can use the default implementation which returns None. Hypervisors with MAC limits should return a set of MAC addresses, which will be supplied to the allocate_for_instance call by the compute manager, and it is up to that call to ensure that all assigned network details are compatible with the set of MAC addresses. This is called during spawn_instance by the compute manager. :return: None, or a set of MAC ids (e.g. set(['12:34:56:78:90:ab'])). None means 'no constraints', a set means 'these and only these MAC addresses'. """ return None
**** CubicPower OpenStack Study **** def dhcp_options_for_instance(self, instance): """Get DHCP options for this instance. Some hypervisors (such as bare metal) require that instances boot from the network, and manage their own TFTP service. This requires passing the appropriate options out to the DHCP service. Most hypervisors can use the default implementation which returns None. This is called during spawn_instance by the compute manager. Note that the format of the return value is specific to Quantum client API. :return: None, or a set of DHCP options, eg: [{'opt_name': 'bootfile-name', 'opt_value': '/tftpboot/path/to/config'}, {'opt_name': 'server-ip-address', 'opt_value': '1.2.3.4'}, {'opt_name': 'tftp-server', 'opt_value': '1.2.3.4'} ] """ pass
**** CubicPower OpenStack Study **** def manage_image_cache(self, context, all_instances): """Manage the driver's local image cache. Some drivers chose to cache images for instances on disk. This method is an opportunity to do management of that cache which isn't directly related to other calls into the driver. The prime example is to clean the cache and remove images which are no longer of interest. :param instances: nova.objects.instance.InstanceList """ pass
**** CubicPower OpenStack Study **** def add_to_aggregate(self, context, aggregate, host, **kwargs): """Add a compute host to an aggregate.""" #NOTE(jogo) Currently only used for XenAPI-Pool raise NotImplementedError()
**** CubicPower OpenStack Study **** def remove_from_aggregate(self, context, aggregate, host, **kwargs): """Remove a compute host from an aggregate.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def undo_aggregate_operation(self, context, op, aggregate, host, set_error=True): """Undo for Resource Pools.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_volume_connector(self, instance): """Get connector information for the instance for attaching to volumes. Connector information is a dictionary representing the ip of the machine that will be making the connection, the name of the iscsi initiator and the hostname of the machine as follows:: { 'ip': ip, 'initiator': initiator, 'host': hostname } """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def get_available_nodes(self, refresh=False): """Returns nodenames of all nodes managed by the compute service. This method is for multi compute-nodes support. If a driver supports multi compute-nodes, this method returns a list of nodenames managed by the service. Otherwise, this method should return [hypervisor_hostname]. """ stats = self.get_host_stats(refresh=refresh) if not isinstance(stats, list): stats = [stats] return [s['hypervisor_hostname'] for s in stats]
**** CubicPower OpenStack Study **** def node_is_available(self, nodename): """Return whether this compute service manages a particular node.""" if nodename in self.get_available_nodes(): return True # Refresh and check again. return nodename in self.get_available_nodes(refresh=True)
**** CubicPower OpenStack Study **** def get_per_instance_usage(self): """Get information about instance resource usage. :returns: dict of nova uuid => dict of usage info """ return {}
**** CubicPower OpenStack Study **** def instance_on_disk(self, instance): """Checks access of instance files on the host. :param instance: nova.objects.instance.Instance to lookup Returns True if files of an instance with the supplied ID accessible on the host, False otherwise. .. note:: Used in rebuild for HA implementation and required for validation of access to instance shared disk files """ return False
**** CubicPower OpenStack Study **** def register_event_listener(self, callback): """Register a callback to receive events. Register a callback to receive asynchronous event notifications from hypervisors. The callback will be invoked with a single parameter, which will be an instance of the nova.virt.event.Event class. """ self._compute_event_callback = callback
**** CubicPower OpenStack Study **** def emit_event(self, event): """Dispatches an event to the compute manager. Invokes the event callback registered by the compute manager to dispatch the event. This must only be invoked from a green thread. """ if not self._compute_event_callback: LOG.debug(_("Discarding event %s") % str(event)) return if not isinstance(event, virtevent.Event): raise ValueError( _("Event must be an instance of nova.virt.event.Event")) try: LOG.debug(_("Emitting event %s") % str(event)) self._compute_event_callback(event) except Exception as ex: LOG.error(_("Exception dispatching event %(event)s: %(ex)s"), {'event': event, 'ex': ex})
**** CubicPower OpenStack Study **** def delete_instance_files(self, instance): """Delete any lingering instance files for an instance. :param instance: nova.objects.instance.Instance :returns: True if the instance was deleted from disk, False otherwise. """ return True @property
**** CubicPower OpenStack Study **** def need_legacy_block_device_info(self): """Tell the caller if the driver requires legacy block device info. Tell the caller weather we expect the legacy format of block device info to be passed in to methods that expect it. """ return True
**** CubicPower OpenStack Study **** def volume_snapshot_create(self, context, instance, volume_id, create_info): """Snapshots volumes attached to a specified instance. :param context: request context :param instance: nova.objects.instance.Instance that has the volume attached :param volume_id: Volume to be snapshotted :param create_info: The data needed for nova to be able to attach to the volume. This is the same data format returned by Cinder's initialize_connection() API call. In the case of doing a snapshot, it is the image file Cinder expects to be used as the active disk after the snapshot operation has completed. There may be other data included as well that is needed for creating the snapshot. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def volume_snapshot_delete(self, context, instance, volume_id, snapshot_id, delete_info): """Snapshots volumes attached to a specified instance. :param context: request context :param instance: nova.objects.instance.Instance that has the volume attached :param volume_id: Attached volume associated with the snapshot :param snapshot_id: The snapshot to delete. :param delete_info: Volume backend technology specific data needed to be able to complete the snapshot. For example, in the case of qcow2 backed snapshots, this would include the file being merged, and the file being merged into (if appropriate). """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def default_root_device_name(self, instance, image_meta, root_bdm): """Provide a default root device name for the driver.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def default_device_names_for_instance(self, instance, root_device_name, *block_device_lists): """Default the missing device names in the block device mapping.""" raise NotImplementedError() def load_compute_driver(virtapi, compute_driver=None): """Load a compute driver module. Load the compute driver module specified by the compute_driver configuration option or, if supplied, the driver name supplied as an argument. Compute drivers constructors take a VirtAPI object as their first object and this must be supplied. :param virtapi: a VirtAPI instance :param compute_driver: a compute driver name to override the config opt :returns: a ComputeDriver instance """ if not compute_driver: compute_driver = CONF.compute_driver if not compute_driver: LOG.error(_("Compute driver option required, but not specified")) sys.exit(1) LOG.info(_("Loading compute driver '%s'") % compute_driver) try: driver = importutils.import_object_ns('nova.virt', compute_driver, virtapi) return utils.check_isinstance(driver, ComputeDriver) except ImportError: LOG.exception(_("Unable to load the virtualization driver")) sys.exit(1) def compute_driver_matches(match): return CONF.compute_driver and CONF.compute_driver.endswith(match)
**** CubicPower OpenStack Study **** def load_compute_driver(virtapi, compute_driver=None): """Load a compute driver module. Load the compute driver module specified by the compute_driver configuration option or, if supplied, the driver name supplied as an argument. Compute drivers constructors take a VirtAPI object as their first object and this must be supplied. :param virtapi: a VirtAPI instance :param compute_driver: a compute driver name to override the config opt :returns: a ComputeDriver instance """ if not compute_driver: compute_driver = CONF.compute_driver if not compute_driver: LOG.error(_("Compute driver option required, but not specified")) sys.exit(1) LOG.info(_("Loading compute driver '%s'") % compute_driver) try: driver = importutils.import_object_ns('nova.virt', compute_driver, virtapi) return utils.check_isinstance(driver, ComputeDriver) except ImportError: LOG.exception(_("Unable to load the virtualization driver")) sys.exit(1)
**** CubicPower OpenStack Study **** def compute_driver_matches(match): return CONF.compute_driver and CONF.compute_driver.endswith(match)
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