304 lines
13 KiB
Python
304 lines
13 KiB
Python
# Copyright 2013 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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iPXE Boot Interface
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"""
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from ironic_lib import metrics_utils
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from oslo_log import log as logging
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from oslo_utils import strutils
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from ironic.common import boot_devices
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from ironic.common import dhcp_factory
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from ironic.common import exception
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from ironic.common.glance_service import service_utils
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from ironic.common.i18n import _
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from ironic.common import pxe_utils
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from ironic.common import states
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from ironic.conductor import utils as manager_utils
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from ironic.conf import CONF
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from ironic.drivers import base
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from ironic.drivers.modules import boot_mode_utils
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from ironic.drivers.modules import deploy_utils
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from ironic.drivers.modules import pxe
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from ironic.drivers.modules import pxe_base
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from ironic.drivers import utils as driver_utils
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LOG = logging.getLogger(__name__)
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METRICS = metrics_utils.get_metrics_logger(__name__)
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COMMON_PROPERTIES = pxe_base.COMMON_PROPERTIES
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class iPXEBoot(pxe_base.PXEBaseMixin, base.BootInterface):
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capabilities = ['iscsi_volume_boot', 'ramdisk_boot', 'ipxe_boot']
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def __init__(self):
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pxe_utils.create_ipxe_boot_script()
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@METRICS.timer('iPXEBoot.validate')
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def validate(self, task):
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"""Validate the PXE-specific info for booting deploy/instance images.
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This method validates the PXE-specific info for booting the
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ramdisk and instance on the node. If invalid, raises an
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exception; otherwise returns None.
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:param task: a task from TaskManager.
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:returns: None
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:raises: InvalidParameterValue, if some parameters are invalid.
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:raises: MissingParameterValue, if some required parameters are
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missing.
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"""
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node = task.node
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if not driver_utils.get_node_mac_addresses(task):
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raise exception.MissingParameterValue(
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_("Node %s does not have any port associated with it.")
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% node.uuid)
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if not CONF.deploy.http_url or not CONF.deploy.http_root:
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raise exception.MissingParameterValue(_(
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"iPXE boot is enabled but no HTTP URL or HTTP "
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"root was specified."))
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# Check the trusted_boot capabilities value.
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deploy_utils.validate_capabilities(node)
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if deploy_utils.is_trusted_boot_requested(node):
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# Check if 'boot_option' and boot mode is compatible with
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# trusted boot.
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# NOTE(TheJulia): So in theory (huge theory here, not put to
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# practice or tested), that one can define the kernel as tboot
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# and define the actual kernel and ramdisk as appended data.
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# Similar to how one can iPXE load the XEN hypervisor.
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# tboot mailing list seem to indicate pxe/ipxe support, or
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# more specifically avoiding breaking the scenarios of use,
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# but there is also no definitive documentation on the subject.
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LOG.warning('Trusted boot has been requested for %(node)s in '
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'concert with iPXE. This is not a supported '
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'configuration for an ironic deployment.',
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{'node': node.uuid})
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pxe.validate_boot_parameters_for_trusted_boot(node)
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pxe_utils.parse_driver_info(node)
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# NOTE(TheJulia): If we're not writing an image, we can skip
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# the remainder of this method.
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if (not task.driver.storage.should_write_image(task)):
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return
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d_info = deploy_utils.get_image_instance_info(node)
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if (node.driver_internal_info.get('is_whole_disk_image')
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or deploy_utils.get_boot_option(node) == 'local'):
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props = []
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elif service_utils.is_glance_image(d_info['image_source']):
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props = ['kernel_id', 'ramdisk_id']
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else:
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props = ['kernel', 'ramdisk']
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deploy_utils.validate_image_properties(task.context, d_info, props)
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@METRICS.timer('iPXEBoot.prepare_ramdisk')
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def prepare_ramdisk(self, task, ramdisk_params):
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"""Prepares the boot of Ironic ramdisk using PXE.
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This method prepares the boot of the deploy or rescue kernel/ramdisk
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after reading relevant information from the node's driver_info and
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instance_info.
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:param task: a task from TaskManager.
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:param ramdisk_params: the parameters to be passed to the ramdisk.
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pxe driver passes these parameters as kernel command-line
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arguments.
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:returns: None
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:raises: MissingParameterValue, if some information is missing in
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node's driver_info or instance_info.
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:raises: InvalidParameterValue, if some information provided is
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invalid.
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:raises: IronicException, if some power or set boot boot device
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operation failed on the node.
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"""
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node = task.node
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# Label indicating a deploy or rescue operation being carried out on
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# the node, 'deploy' or 'rescue'. Unless the node is in a rescue like
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# state, the mode is set to 'deploy', indicating deploy operation is
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# being carried out.
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mode = deploy_utils.rescue_or_deploy_mode(node)
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# NOTE(mjturek): At this point, the ipxe boot script should
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# already exist as it is created at startup time. However, we
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# call the boot script create method here to assert its
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# existence and handle the unlikely case that it wasn't created
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# or was deleted.
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pxe_utils.create_ipxe_boot_script()
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dhcp_opts = pxe_utils.dhcp_options_for_instance(
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task, ipxe_enabled=True)
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provider = dhcp_factory.DHCPFactory()
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provider.update_dhcp(task, dhcp_opts)
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pxe_info = pxe_utils.get_image_info(node, mode=mode,
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ipxe_enabled=True)
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# NODE: Try to validate and fetch instance images only
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# if we are in DEPLOYING state.
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if node.provision_state == states.DEPLOYING:
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pxe_info.update(
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pxe_utils.get_instance_image_info(task, ipxe_enabled=True))
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boot_mode_utils.sync_boot_mode(task)
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pxe_options = pxe_utils.build_pxe_config_options(task, pxe_info,
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ipxe_enabled=True)
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pxe_options.update(ramdisk_params)
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pxe_config_template = deploy_utils.get_pxe_config_template(node)
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pxe_utils.create_pxe_config(task, pxe_options,
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pxe_config_template,
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ipxe_enabled=True)
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persistent = False
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value = node.driver_info.get('force_persistent_boot_device',
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'Default')
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if value in {'Always', 'Default', 'Never'}:
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if value == 'Always':
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persistent = True
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else:
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persistent = strutils.bool_from_string(value, False)
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manager_utils.node_set_boot_device(task, boot_devices.PXE,
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persistent=persistent)
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if CONF.pxe.ipxe_use_swift:
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kernel_label = '%s_kernel' % mode
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ramdisk_label = '%s_ramdisk' % mode
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pxe_info.pop(kernel_label, None)
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pxe_info.pop(ramdisk_label, None)
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if pxe_info:
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pxe_utils.cache_ramdisk_kernel(task, pxe_info, ipxe_enabled=True)
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@METRICS.timer('iPXEBoot.prepare_instance')
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def prepare_instance(self, task):
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"""Prepares the boot of instance.
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This method prepares the boot of the instance after reading
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relevant information from the node's instance_info. In case of netboot,
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it updates the dhcp entries and switches the PXE config. In case of
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localboot, it cleans up the PXE config.
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:param task: a task from TaskManager.
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:returns: None
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"""
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boot_mode_utils.sync_boot_mode(task)
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node = task.node
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boot_option = deploy_utils.get_boot_option(node)
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boot_device = None
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instance_image_info = {}
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if boot_option == "ramdisk":
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instance_image_info = pxe_utils.get_instance_image_info(
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task, ipxe_enabled=True)
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pxe_utils.cache_ramdisk_kernel(task, instance_image_info,
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ipxe_enabled=True)
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if deploy_utils.is_iscsi_boot(task) or boot_option == "ramdisk":
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pxe_utils.prepare_instance_pxe_config(
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task, instance_image_info,
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iscsi_boot=deploy_utils.is_iscsi_boot(task),
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ramdisk_boot=(boot_option == "ramdisk"),
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ipxe_enabled=True)
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boot_device = boot_devices.PXE
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elif boot_option != "local":
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if task.driver.storage.should_write_image(task):
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# Make sure that the instance kernel/ramdisk is cached.
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# This is for the takeover scenario for active nodes.
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instance_image_info = pxe_utils.get_instance_image_info(
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task, ipxe_enabled=True)
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pxe_utils.cache_ramdisk_kernel(task, instance_image_info,
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ipxe_enabled=True)
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# If it's going to PXE boot we need to update the DHCP server
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dhcp_opts = pxe_utils.dhcp_options_for_instance(task,
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ipxe_enabled=True)
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provider = dhcp_factory.DHCPFactory()
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provider.update_dhcp(task, dhcp_opts)
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iwdi = task.node.driver_internal_info.get('is_whole_disk_image')
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try:
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root_uuid_or_disk_id = task.node.driver_internal_info[
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'root_uuid_or_disk_id'
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]
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except KeyError:
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if not task.driver.storage.should_write_image(task):
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pass
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elif not iwdi:
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LOG.warning("The UUID for the root partition can't be "
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"found, unable to switch the pxe config from "
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"deployment mode to service (boot) mode for "
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"node %(node)s", {"node": task.node.uuid})
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else:
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LOG.warning("The disk id for the whole disk image can't "
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"be found, unable to switch the pxe config "
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"from deployment mode to service (boot) mode "
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"for node %(node)s. Booting the instance "
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"from disk.", {"node": task.node.uuid})
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pxe_utils.clean_up_pxe_config(task, ipxe_enabled=True)
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boot_device = boot_devices.DISK
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else:
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pxe_utils.build_service_pxe_config(task, instance_image_info,
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root_uuid_or_disk_id,
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ipxe_enabled=True)
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boot_device = boot_devices.PXE
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else:
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# If it's going to boot from the local disk, we don't need
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# PXE config files. They still need to be generated as part
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# of the prepare() because the deployment does PXE boot the
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# deploy ramdisk
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pxe_utils.clean_up_pxe_config(task, ipxe_enabled=True)
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boot_device = boot_devices.DISK
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# NOTE(pas-ha) do not re-set boot device on ACTIVE nodes
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# during takeover
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if boot_device and task.node.provision_state != states.ACTIVE:
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persistent = True
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if node.driver_info.get('force_persistent_boot_device',
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'Default') == 'Never':
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persistent = False
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manager_utils.node_set_boot_device(task, boot_device,
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persistent=persistent)
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@METRICS.timer('iPXEBoot.clean_up_instance')
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def clean_up_instance(self, task):
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"""Cleans up the boot of instance.
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This method cleans up the environment that was setup for booting
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the instance. It unlinks the instance kernel/ramdisk in node's
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directory in tftproot and removes the PXE config.
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:param task: a task from TaskManager.
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:returns: None
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"""
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node = task.node
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try:
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images_info = pxe_utils.get_instance_image_info(task,
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ipxe_enabled=True)
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except exception.MissingParameterValue as e:
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LOG.warning('Could not get instance image info '
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'to clean up images for node %(node)s: %(err)s',
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{'node': node.uuid, 'err': e})
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else:
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pxe_utils.clean_up_pxe_env(task, images_info)
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