# Copyright 2013 Hewlett-Packard Development Company, L.P. # # 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. """ iPXE Boot Interface """ from ironic_lib import metrics_utils from oslo_log import log as logging from oslo_utils import strutils from ironic.common import boot_devices from ironic.common import dhcp_factory from ironic.common import exception from ironic.common.glance_service import service_utils from ironic.common.i18n import _ from ironic.common import pxe_utils from ironic.common import states from ironic.conductor import utils as manager_utils from ironic.conf import CONF from ironic.drivers import base from ironic.drivers.modules import boot_mode_utils from ironic.drivers.modules import deploy_utils from ironic.drivers.modules import pxe from ironic.drivers.modules import pxe_base from ironic.drivers import utils as driver_utils LOG = logging.getLogger(__name__) METRICS = metrics_utils.get_metrics_logger(__name__) COMMON_PROPERTIES = pxe_base.COMMON_PROPERTIES class iPXEBoot(pxe_base.PXEBaseMixin, base.BootInterface): ipxe_enabled = True capabilities = ['iscsi_volume_boot', 'ramdisk_boot', 'ipxe_boot'] def __init__(self): pxe_utils.create_ipxe_boot_script() @METRICS.timer('iPXEBoot.validate') def validate(self, task): """Validate the PXE-specific info for booting deploy/instance images. This method validates the PXE-specific info for booting the ramdisk and instance on the node. If invalid, raises an exception; otherwise returns None. :param task: a task from TaskManager. :returns: None :raises: InvalidParameterValue, if some parameters are invalid. :raises: MissingParameterValue, if some required parameters are missing. """ node = task.node if not driver_utils.get_node_mac_addresses(task): raise exception.MissingParameterValue( _("Node %s does not have any port associated with it.") % node.uuid) if not CONF.deploy.http_url or not CONF.deploy.http_root: raise exception.MissingParameterValue(_( "iPXE boot is enabled but no HTTP URL or HTTP " "root was specified.")) # Check the trusted_boot capabilities value. deploy_utils.validate_capabilities(node) if deploy_utils.is_trusted_boot_requested(node): # Check if 'boot_option' and boot mode is compatible with # trusted boot. # NOTE(TheJulia): So in theory (huge theory here, not put to # practice or tested), that one can define the kernel as tboot # and define the actual kernel and ramdisk as appended data. # Similar to how one can iPXE load the XEN hypervisor. # tboot mailing list seem to indicate pxe/ipxe support, or # more specifically avoiding breaking the scenarios of use, # but there is also no definitive documentation on the subject. LOG.warning('Trusted boot has been requested for %(node)s in ' 'concert with iPXE. This is not a supported ' 'configuration for an ironic deployment.', {'node': node.uuid}) pxe.validate_boot_parameters_for_trusted_boot(node) pxe_utils.parse_driver_info(node) # NOTE(TheJulia): If we're not writing an image, we can skip # the remainder of this method. if (not task.driver.storage.should_write_image(task)): return d_info = deploy_utils.get_image_instance_info(node) if (node.driver_internal_info.get('is_whole_disk_image') or deploy_utils.get_boot_option(node) == 'local'): props = [] elif service_utils.is_glance_image(d_info['image_source']): props = ['kernel_id', 'ramdisk_id'] else: props = ['kernel', 'ramdisk'] deploy_utils.validate_image_properties(task.context, d_info, props) @METRICS.timer('iPXEBoot.prepare_ramdisk') def prepare_ramdisk(self, task, ramdisk_params): """Prepares the boot of Ironic ramdisk using PXE. This method prepares the boot of the deploy or rescue kernel/ramdisk after reading relevant information from the node's driver_info and instance_info. :param task: a task from TaskManager. :param ramdisk_params: the parameters to be passed to the ramdisk. pxe driver passes these parameters as kernel command-line arguments. :returns: None :raises: MissingParameterValue, if some information is missing in node's driver_info or instance_info. :raises: InvalidParameterValue, if some information provided is invalid. :raises: IronicException, if some power or set boot boot device operation failed on the node. """ node = task.node # Label indicating a deploy or rescue operation being carried out on # the node, 'deploy' or 'rescue'. Unless the node is in a rescue like # state, the mode is set to 'deploy', indicating deploy operation is # being carried out. mode = deploy_utils.rescue_or_deploy_mode(node) # NOTE(mjturek): At this point, the ipxe boot script should # already exist as it is created at startup time. However, we # call the boot script create method here to assert its # existence and handle the unlikely case that it wasn't created # or was deleted. pxe_utils.create_ipxe_boot_script() dhcp_opts = pxe_utils.dhcp_options_for_instance( task, ipxe_enabled=True) provider = dhcp_factory.DHCPFactory() provider.update_dhcp(task, dhcp_opts) pxe_info = pxe_utils.get_image_info(node, mode=mode, ipxe_enabled=True) # NODE: Try to validate and fetch instance images only # if we are in DEPLOYING state. if node.provision_state == states.DEPLOYING: pxe_info.update( pxe_utils.get_instance_image_info(task, ipxe_enabled=True)) boot_mode_utils.sync_boot_mode(task) pxe_options = pxe_utils.build_pxe_config_options( task, pxe_info, ipxe_enabled=True, ramdisk_params=ramdisk_params) # TODO(dtantsur): backwards compability hack, remove in the V release if ramdisk_params.get("ipa-api-url"): pxe_options["ipa-api-url"] = ramdisk_params["ipa-api-url"] pxe_config_template = deploy_utils.get_pxe_config_template(node) pxe_utils.create_pxe_config(task, pxe_options, pxe_config_template, ipxe_enabled=True) persistent = False value = node.driver_info.get('force_persistent_boot_device', 'Default') if value in {'Always', 'Default', 'Never'}: if value == 'Always': persistent = True else: persistent = strutils.bool_from_string(value, False) manager_utils.node_set_boot_device(task, boot_devices.PXE, persistent=persistent) if CONF.pxe.ipxe_use_swift: kernel_label = '%s_kernel' % mode ramdisk_label = '%s_ramdisk' % mode pxe_info.pop(kernel_label, None) pxe_info.pop(ramdisk_label, None) if pxe_info: pxe_utils.cache_ramdisk_kernel(task, pxe_info, ipxe_enabled=True) LOG.debug('Ramdisk iPXE boot for node %(node)s has been prepared ' 'with kernel params %(params)s', {'node': node.uuid, 'params': pxe_options}) @METRICS.timer('iPXEBoot.prepare_instance') def prepare_instance(self, task): """Prepares the boot of instance. This method prepares the boot of the instance after reading relevant information from the node's instance_info. In case of netboot, it updates the dhcp entries and switches the PXE config. In case of localboot, it cleans up the PXE config. :param task: a task from TaskManager. :returns: None """ boot_mode_utils.sync_boot_mode(task) node = task.node boot_option = deploy_utils.get_boot_option(node) boot_device = None instance_image_info = {} if boot_option == "ramdisk": instance_image_info = pxe_utils.get_instance_image_info( task, ipxe_enabled=True) pxe_utils.cache_ramdisk_kernel(task, instance_image_info, ipxe_enabled=True) if deploy_utils.is_iscsi_boot(task) or boot_option == "ramdisk": pxe_utils.prepare_instance_pxe_config( task, instance_image_info, iscsi_boot=deploy_utils.is_iscsi_boot(task), ramdisk_boot=(boot_option == "ramdisk"), ipxe_enabled=True) boot_device = boot_devices.PXE elif boot_option != "local": if task.driver.storage.should_write_image(task): # Make sure that the instance kernel/ramdisk is cached. # This is for the takeover scenario for active nodes. instance_image_info = pxe_utils.get_instance_image_info( task, ipxe_enabled=True) pxe_utils.cache_ramdisk_kernel(task, instance_image_info, ipxe_enabled=True) # If it's going to PXE boot we need to update the DHCP server dhcp_opts = pxe_utils.dhcp_options_for_instance(task, ipxe_enabled=True) provider = dhcp_factory.DHCPFactory() provider.update_dhcp(task, dhcp_opts) iwdi = task.node.driver_internal_info.get('is_whole_disk_image') try: root_uuid_or_disk_id = task.node.driver_internal_info[ 'root_uuid_or_disk_id' ] except KeyError: if not task.driver.storage.should_write_image(task): pass elif not iwdi: LOG.warning("The UUID for the root partition can't be " "found, unable to switch the pxe config from " "deployment mode to service (boot) mode for " "node %(node)s", {"node": task.node.uuid}) else: LOG.warning("The disk id for the whole disk image can't " "be found, unable to switch the pxe config " "from deployment mode to service (boot) mode " "for node %(node)s. Booting the instance " "from disk.", {"node": task.node.uuid}) pxe_utils.clean_up_pxe_config(task, ipxe_enabled=True) boot_device = boot_devices.DISK else: pxe_utils.build_service_pxe_config(task, instance_image_info, root_uuid_or_disk_id, ipxe_enabled=True) boot_device = boot_devices.PXE else: # If it's going to boot from the local disk, we don't need # PXE config files. They still need to be generated as part # of the prepare() because the deployment does PXE boot the # deploy ramdisk pxe_utils.clean_up_pxe_config(task, ipxe_enabled=True) boot_device = boot_devices.DISK # NOTE(pas-ha) do not re-set boot device on ACTIVE nodes # during takeover if boot_device and task.node.provision_state != states.ACTIVE: persistent = True if node.driver_info.get('force_persistent_boot_device', 'Default') == 'Never': persistent = False manager_utils.node_set_boot_device(task, boot_device, persistent=persistent) @METRICS.timer('iPXEBoot.clean_up_instance') def clean_up_instance(self, task): """Cleans up the boot of instance. This method cleans up the environment that was setup for booting the instance. It unlinks the instance kernel/ramdisk in node's directory in tftproot and removes the PXE config. :param task: a task from TaskManager. :returns: None """ node = task.node try: images_info = pxe_utils.get_instance_image_info(task, ipxe_enabled=True) except exception.MissingParameterValue as e: LOG.warning('Could not get instance image info ' 'to clean up images for node %(node)s: %(err)s', {'node': node.uuid, 'err': e}) else: pxe_utils.clean_up_pxe_env(task, images_info, ipxe_enabled=True)