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OpenStack Study: tilera.py**** CubicPower OpenStack Study ****
# Copyright (c) 2011-2013 University of Southern California / ISI # 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. """ Class for Tilera bare-metal nodes. """ import base64 import os import jinja2 from oslo.config import cfg from nova.compute import flavors from nova import exception from nova.openstack.common.db import exception as db_exc from nova.openstack.common import fileutils from nova.openstack.common.gettextutils import _ from nova.openstack.common import log as logging from nova import utils from nova.virt.baremetal import baremetal_states from nova.virt.baremetal import base from nova.virt.baremetal import db from nova.virt.baremetal import utils as bm_utils LOG = logging.getLogger(__name__) CONF = cfg.CONF CONF.import_opt('use_ipv6', 'nova.netconf') CONF.import_opt('net_config_template', 'nova.virt.baremetal.pxe', group='baremetal')
**** CubicPower OpenStack Study **** def build_network_config(network_info): interfaces = bm_utils.map_network_interfaces(network_info, CONF.use_ipv6) tmpl_path, tmpl_file = os.path.split(CONF.baremetal.net_config_template) env = jinja2.Environment(loader=jinja2.FileSystemLoader(tmpl_path)) template = env.get_template(tmpl_file) return template.render({'interfaces': interfaces, 'use_ipv6': CONF.use_ipv6})
**** CubicPower OpenStack Study **** def get_image_dir_path(instance): """Generate the dir for an instances disk.""" return os.path.join(CONF.instances_path, instance['name'])
**** CubicPower OpenStack Study **** def get_image_file_path(instance): """Generate the full path for an instances disk.""" return os.path.join(CONF.instances_path, instance['name'], 'disk')
**** CubicPower OpenStack Study **** def get_tilera_nfs_path(node_id): """Generate the path for an instances Tilera nfs.""" tilera_nfs_dir = "fs_" + str(node_id) return os.path.join(CONF.baremetal.tftp_root, tilera_nfs_dir)
**** CubicPower OpenStack Study **** def get_partition_sizes(instance): flavor = flavors.extract_flavor(instance) root_mb = flavor['root_gb'] * 1024 swap_mb = flavor['swap'] if swap_mb < 1: swap_mb = 1 return (root_mb, swap_mb)
**** CubicPower OpenStack Study **** def get_tftp_image_info(instance): """Generate the paths for tftp files for this instance. Raises NovaException if - instance does not contain kernel_id """ image_info = { 'kernel': [None, None], } try: image_info['kernel'][0] = str(instance['kernel_id']) except KeyError: pass missing_labels = [] for label in image_info.keys(): (uuid, path) = image_info[label] if not uuid: missing_labels.append(label) else: image_info[label][1] = os.path.join(CONF.baremetal.tftp_root, instance['uuid'], label) if missing_labels: raise exception.NovaException(_( "Can not activate Tilera bootloader. " "The following boot parameters " "were not passed to baremetal driver: %s") % missing_labels) return image_info
**** CubicPower OpenStack Study **** class Tilera(base.NodeDriver): """Tilera bare metal driver."""
**** CubicPower OpenStack Study **** def __init__(self, virtapi): super(Tilera, self).__init__(virtapi)
**** CubicPower OpenStack Study **** def _collect_mac_addresses(self, context, node): macs = set() for nic in db.bm_interface_get_all_by_bm_node_id(context, node['id']): if nic['address']: macs.add(nic['address']) return sorted(macs)
**** CubicPower OpenStack Study **** def _cache_tftp_images(self, context, instance, image_info): """Fetch the necessary kernels and ramdisks for the instance.""" fileutils.ensure_tree( os.path.join(CONF.baremetal.tftp_root, instance['uuid'])) LOG.debug(_("Fetching kernel and ramdisk for instance %s") % instance['name']) for label in image_info.keys(): (uuid, path) = image_info[label] bm_utils.cache_image( context=context, target=path, image_id=uuid, user_id=instance['user_id'], project_id=instance['project_id'], )
**** CubicPower OpenStack Study **** def _cache_image(self, context, instance, image_meta): """Fetch the instance's image from Glance This method pulls the relevant AMI and associated kernel and ramdisk, and the deploy kernel and ramdisk from Glance, and writes them to the appropriate places on local disk. Both sets of kernel and ramdisk are needed for Tilera booting, so these are stored under CONF.baremetal.tftp_root. At present, the AMI is cached and certain files are injected. Debian/ubuntu-specific assumptions are made regarding the injected files. In a future revision, this functionality will be replaced by a more scalable and os-agnostic approach: the deployment ramdisk will fetch from Glance directly, and write its own last-mile configuration. """ fileutils.ensure_tree(get_image_dir_path(instance)) image_path = get_image_file_path(instance) LOG.debug(_("Fetching image %(ami)s for instance %(name)s") % {'ami': image_meta['id'], 'name': instance['name']}) bm_utils.cache_image(context=context, target=image_path, image_id=image_meta['id'], user_id=instance['user_id'], project_id=instance['project_id'], clean=True, ) return [image_meta['id'], image_path]
**** CubicPower OpenStack Study **** def _inject_into_image(self, context, node, instance, network_info, injected_files=None, admin_password=None): """Inject last-mile configuration into instances image Much of this method is a hack around DHCP and cloud-init not working together with baremetal provisioning yet. """ partition = None if not instance['kernel_id']: partition = "1" ssh_key = None if 'key_data' in instance and instance['key_data']: ssh_key = str(instance['key_data']) if injected_files is None: injected_files = [] else: injected_files = list(injected_files) net_config = build_network_config(network_info) if instance['hostname']: injected_files.append(('/etc/hostname', instance['hostname'])) LOG.debug(_("Injecting files into image for instance %(name)s") % {'name': instance['name']}) bm_utils.inject_into_image( image=get_image_file_path(instance), key=ssh_key, net=net_config, metadata=utils.instance_meta(instance), admin_password=admin_password, files=injected_files, partition=partition, )
**** CubicPower OpenStack Study **** def cache_images(self, context, node, instance, admin_password, image_meta, injected_files, network_info): """Prepare all the images for this instance.""" tftp_image_info = get_tftp_image_info(instance) self._cache_tftp_images(context, instance, tftp_image_info) self._cache_image(context, instance, image_meta) self._inject_into_image(context, node, instance, network_info, injected_files, admin_password)
**** CubicPower OpenStack Study **** def destroy_images(self, context, node, instance): """Delete instance's image file.""" bm_utils.unlink_without_raise(get_image_file_path(instance)) bm_utils.rmtree_without_raise(get_image_dir_path(instance))
**** CubicPower OpenStack Study **** def activate_bootloader(self, context, node, instance, network_info): """Configure Tilera boot loader for an instance Kernel and ramdisk images are downloaded by cache_tftp_images, and stored in /tftpboot/{uuid}/ This method writes the instances config file, and then creates symlinks for each MAC address in the instance. By default, the complete layout looks like this: /tftpboot/ ./{uuid}/ kernel ./fs_node_id/ """ image_info = get_tftp_image_info(instance) (root_mb, swap_mb) = get_partition_sizes(instance) tilera_nfs_path = get_tilera_nfs_path(node['id']) image_file_path = get_image_file_path(instance) deployment_key = bm_utils.random_alnum(32) db.bm_node_update(context, node['id'], {'deploy_key': deployment_key, 'image_path': image_file_path, 'pxe_config_path': tilera_nfs_path, 'root_mb': root_mb, 'swap_mb': swap_mb}) if os.path.exists(image_file_path) and \ os.path.exists(tilera_nfs_path): utils.execute('mount', '-o', 'loop', image_file_path, tilera_nfs_path, run_as_root=True)
**** CubicPower OpenStack Study **** def deactivate_bootloader(self, context, node, instance): """Delete Tilera bootloader images and config.""" try: db.bm_node_update(context, node['id'], {'deploy_key': None, 'image_path': None, 'pxe_config_path': None, 'root_mb': 0, 'swap_mb': 0}) except exception.NodeNotFound: pass tilera_nfs_path = get_tilera_nfs_path(node['id']) if os.path.ismount(tilera_nfs_path): utils.execute('rpc.mountd', run_as_root=True) utils.execute('umount', '-f', tilera_nfs_path, run_as_root=True) try: image_info = get_tftp_image_info(instance) except exception.NovaException: pass else: for label in image_info.keys(): (uuid, path) = image_info[label] bm_utils.unlink_without_raise(path) try: macs = self._collect_mac_addresses(context, node) except db_exc.DBError: pass if os.path.exists(os.path.join(CONF.baremetal.tftp_root, instance['uuid'])): bm_utils.rmtree_without_raise( os.path.join(CONF.baremetal.tftp_root, instance['uuid']))
**** CubicPower OpenStack Study **** def _iptables_set(self, node_ip, user_data): """Sets security setting (iptables:port) if needed. iptables -A INPUT -p tcp ! -s $IP --dport $PORT -j DROP /tftpboot/iptables_rule script sets iptables rule on the given node. """ rule_path = CONF.baremetal.tftp_root + "/iptables_rule" if user_data is not None: open_ip = base64.b64decode(user_data) utils.execute(rule_path, node_ip, open_ip)
**** CubicPower OpenStack Study **** def activate_node(self, context, node, instance): """Wait for Tilera deployment to complete.""" locals = {'error': '', 'started': False} try: row = db.bm_node_get(context, node['id']) if instance['uuid'] != row.get('instance_uuid'): locals['error'] = _("Node associated with another instance" " while waiting for deploy of %s") status = row.get('task_state') if (status == baremetal_states.DEPLOYING and locals['started'] == False): LOG.info(_('Tilera deploy started for instance %s') % instance['uuid']) locals['started'] = True elif status in (baremetal_states.DEPLOYDONE, baremetal_states.BUILDING, baremetal_states.ACTIVE): LOG.info(_("Tilera deploy completed for instance %s") % instance['uuid']) node_ip = node['pm_address'] user_data = instance['user_data'] try: self._iptables_set(node_ip, user_data) except Exception: self.deactivate_bootloader(context, node, instance) raise exception.NovaException(_("Node is " "unknown error state.")) elif status == baremetal_states.DEPLOYFAIL: locals['error'] = _("Tilera deploy failed for instance %s") except exception.NodeNotFound: locals['error'] = _("Baremetal node deleted while waiting " "for deployment of instance %s") if locals['error']: raise exception.InstanceDeployFailure( locals['error'] % instance['uuid'])
**** CubicPower OpenStack Study **** def deactivate_node(self, context, node, instance): pass
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