2 # Copyright (C) The Arvados Authors. All rights reserved.
4 # SPDX-License-Identifier: AGPL-3.0
6 from __future__ import absolute_import, print_function
12 import libcloud.compute.providers as cloud_provider
13 import libcloud.compute.types as cloud_types
15 from . import BaseComputeNodeDriver
16 from .. import arvados_node_fqdn, arvados_timestamp, ARVADOS_TIMEFMT
18 class ComputeNodeDriver(BaseComputeNodeDriver):
19 """Compute node driver wrapper for GCE
21 This translates cloud driver requests to GCE's specific parameters.
23 DEFAULT_DRIVER = cloud_provider.get_driver(cloud_types.Provider.GCE)
26 def __init__(self, auth_kwargs, list_kwargs, create_kwargs,
27 driver_class=DEFAULT_DRIVER):
28 list_kwargs = list_kwargs.copy()
29 tags_str = list_kwargs.pop('tags', '')
30 if not tags_str.strip():
31 self.node_tags = frozenset()
33 self.node_tags = frozenset(t.strip() for t in tags_str.split(','))
34 create_kwargs = create_kwargs.copy()
35 create_kwargs.setdefault('external_ip', None)
36 create_kwargs.setdefault('ex_metadata', {})
37 self._project = auth_kwargs.get("project")
38 super(ComputeNodeDriver, self).__init__(
39 auth_kwargs, list_kwargs, create_kwargs,
41 self._sizes_by_id = {sz.id: sz for sz in self.sizes.itervalues()}
42 self._disktype_links = {dt.name: self._object_link(dt)
43 for dt in self.real.ex_list_disktypes()}
46 def _object_link(cloud_object):
47 return cloud_object.extra.get('selfLink')
49 def _init_image(self, image_name):
50 return 'image', self.search_for(
51 image_name, 'list_images', self._name_key, ex_project=self._project)
53 def _init_network(self, network_name):
54 return 'ex_network', self.search_for(
55 network_name, 'ex_list_networks', self._name_key)
57 def _init_service_accounts(self, service_accounts_str):
58 return 'ex_service_accounts', json.loads(service_accounts_str)
60 def _init_ssh_key(self, filename):
61 # SSH keys are delivered to GCE nodes via ex_metadata: see
62 # http://stackoverflow.com/questions/26752617/creating-sshkeys-for-gce-instance-using-libcloud
63 with open(filename) as ssh_file:
64 self.create_kwargs['ex_metadata']['sshKeys'] = (
65 'root:' + ssh_file.read().strip())
67 def create_cloud_name(self, arvados_node):
68 uuid_parts = arvados_node['uuid'].split('-', 2)
69 return 'compute-{parts[2]}-{parts[0]}'.format(parts=uuid_parts)
71 def arvados_create_kwargs(self, size, arvados_node):
72 name = self.create_cloud_name(arvados_node)
74 if size.scratch > 375000:
75 self._logger.warning("Requested %d MB scratch space, but GCE driver currently only supports attaching a single 375 GB disk.", size.scratch)
83 'diskType': self._disktype_links['pd-standard'],
84 'sourceImage': self._object_link(self.create_kwargs['image']),
90 # Boot images rely on this device name to find the SSD.
91 # Any change must be coordinated in the image.
94 {'diskType': self._disktype_links['local-ssd'],
99 result = {'name': name,
100 'ex_metadata': self.create_kwargs['ex_metadata'].copy(),
101 'ex_tags': list(self.node_tags),
102 'ex_disks_gce_struct': disks,
104 result['ex_metadata'].update({
105 'arvados_node_size': size.id,
106 'arv-ping-url': self._make_ping_url(arvados_node),
107 'booted_at': time.strftime(ARVADOS_TIMEFMT, time.gmtime()),
108 'hostname': arvados_node_fqdn(arvados_node),
112 def list_nodes(self):
113 # The GCE libcloud driver only supports filtering node lists by zone.
114 # Do our own filtering based on tag list.
115 nodelist = [node for node in
116 super(ComputeNodeDriver, self).list_nodes()
117 if self.node_tags.issubset(node.extra.get('tags', []))]
118 for node in nodelist:
119 # As of 0.18, the libcloud GCE driver sets node.size to the size's name.
120 # It's supposed to be the actual size object. Check that it's not,
121 # and monkeypatch the results when that's the case.
122 if not hasattr(node.size, 'id'):
123 node.size = self._sizes_by_id[node.size]
124 # Get arvados-assigned cloud size id
125 node.extra['arvados_node_size'] = node.extra.get('metadata', {}).get('arvados_node_size')
129 def _find_metadata(cls, metadata_items, key):
130 # Given a list of two-item metadata dictonaries, return the one with
131 # the named key. Raise KeyError if not found.
133 return next(data_dict for data_dict in metadata_items
134 if data_dict.get('key') == key)
135 except StopIteration:
139 def _get_metadata(cls, metadata_items, key, *default):
141 return cls._find_metadata(metadata_items, key)['value']
147 def sync_node(self, cloud_node, arvados_node):
148 # Update the cloud node record to ensure we have the correct metadata
150 cloud_node = self.real.ex_get_node(cloud_node.name, cloud_node.extra['zone'])
152 # We can't store the FQDN on the name attribute or anything like it,
153 # because (a) names are static throughout the node's life (so FQDN
154 # isn't available because we don't know it at node creation time) and
155 # (b) it can't contain dots. Instead stash it in metadata.
156 hostname = arvados_node_fqdn(arvados_node)
157 metadata_req = cloud_node.extra['metadata'].copy()
158 metadata_items = metadata_req.setdefault('items', [])
160 self._find_metadata(metadata_items, 'hostname')['value'] = hostname
162 metadata_items.append({'key': 'hostname', 'value': hostname})
164 self.real.ex_set_node_metadata(cloud_node, metadata_items)
167 def node_fqdn(cls, node):
168 # See sync_node comment.
169 return cls._get_metadata(node.extra['metadata'].get('items', []),
173 def node_start_time(cls, node):
175 return arvados_timestamp(cls._get_metadata(
176 node.extra['metadata']['items'], 'booted_at'))
181 def node_id(cls, node):