3 from __future__ import absolute_import, print_function
9 import libcloud.compute.providers as cloud_provider
10 import libcloud.compute.types as cloud_types
12 from . import BaseComputeNodeDriver
13 from .. import arvados_node_fqdn, arvados_timestamp, ARVADOS_TIMEFMT
15 class ComputeNodeDriver(BaseComputeNodeDriver):
16 """Compute node driver wrapper for GCE
18 This translates cloud driver requests to GCE's specific parameters.
20 DEFAULT_DRIVER = cloud_provider.get_driver(cloud_types.Provider.GCE)
23 def __init__(self, auth_kwargs, list_kwargs, create_kwargs,
24 driver_class=DEFAULT_DRIVER):
25 list_kwargs = list_kwargs.copy()
26 tags_str = list_kwargs.pop('tags', '')
27 if not tags_str.strip():
28 self.node_tags = frozenset()
30 self.node_tags = frozenset(t.strip() for t in tags_str.split(','))
31 create_kwargs = create_kwargs.copy()
32 create_kwargs.setdefault('external_ip', None)
33 create_kwargs.setdefault('ex_metadata', {})
34 self._project = auth_kwargs.get("project")
35 super(ComputeNodeDriver, self).__init__(
36 auth_kwargs, list_kwargs, create_kwargs,
38 self._sizes_by_name = {sz.name: sz for sz in self.sizes.itervalues()}
39 self._disktype_links = {dt.name: self._object_link(dt)
40 for dt in self.real.ex_list_disktypes()}
43 def _object_link(cloud_object):
44 return cloud_object.extra.get('selfLink')
46 def _init_image(self, image_name):
47 return 'image', self.search_for(
48 image_name, 'list_images', self._name_key, ex_project=self._project)
50 def _init_network(self, network_name):
51 return 'ex_network', self.search_for(
52 network_name, 'ex_list_networks', self._name_key)
54 def _init_service_accounts(self, service_accounts_str):
55 return 'ex_service_accounts', json.loads(service_accounts_str)
57 def _init_ssh_key(self, filename):
58 # SSH keys are delivered to GCE nodes via ex_metadata: see
59 # http://stackoverflow.com/questions/26752617/creating-sshkeys-for-gce-instance-using-libcloud
60 with open(filename) as ssh_file:
61 self.create_kwargs['ex_metadata']['sshKeys'] = (
62 'root:' + ssh_file.read().strip())
64 def create_cloud_name(self, arvados_node):
65 uuid_parts = arvados_node['uuid'].split('-', 2)
66 return 'compute-{parts[2]}-{parts[0]}'.format(parts=uuid_parts)
68 def arvados_create_kwargs(self, size, arvados_node):
69 name = self.create_cloud_name(arvados_node)
71 if size.scratch > 375000:
72 self._logger.warning("Requested %d MB scratch space, but GCE driver currently only supports attaching a single 375 GB disk.", size.scratch)
80 'diskType': self._disktype_links['pd-standard'],
81 'sourceImage': self._object_link(self.create_kwargs['image']),
87 # Boot images rely on this device name to find the SSD.
88 # Any change must be coordinated in the image.
91 {'diskType': self._disktype_links['local-ssd'],
96 result = {'name': name,
97 'ex_metadata': self.create_kwargs['ex_metadata'].copy(),
98 'ex_tags': list(self.node_tags),
99 'ex_disks_gce_struct': disks,
101 result['ex_metadata'].update({
102 'arv-ping-url': self._make_ping_url(arvados_node),
103 'booted_at': time.strftime(ARVADOS_TIMEFMT, time.gmtime()),
104 'hostname': arvados_node_fqdn(arvados_node),
109 def list_nodes(self):
110 # The GCE libcloud driver only supports filtering node lists by zone.
111 # Do our own filtering based on tag list.
112 nodelist = [node for node in
113 super(ComputeNodeDriver, self).list_nodes()
114 if self.node_tags.issubset(node.extra.get('tags', []))]
115 # As of 0.18, the libcloud GCE driver sets node.size to the size's name.
116 # It's supposed to be the actual size object. Check that it's not,
117 # and monkeypatch the results when that's the case.
118 if nodelist and not hasattr(nodelist[0].size, 'id'):
119 for node in nodelist:
120 node.size = self._sizes_by_name[node.size]
124 def _find_metadata(cls, metadata_items, key):
125 # Given a list of two-item metadata dictonaries, return the one with
126 # the named key. Raise KeyError if not found.
128 return next(data_dict for data_dict in metadata_items
129 if data_dict.get('key') == key)
130 except StopIteration:
134 def _get_metadata(cls, metadata_items, key, *default):
136 return cls._find_metadata(metadata_items, key)['value']
142 def sync_node(self, cloud_node, arvados_node):
143 # Update the cloud node record to ensure we have the correct metadata
145 cloud_node = self.real.ex_get_node(cloud_node.name, cloud_node.extra['zone'])
147 # We can't store the FQDN on the name attribute or anything like it,
148 # because (a) names are static throughout the node's life (so FQDN
149 # isn't available because we don't know it at node creation time) and
150 # (b) it can't contain dots. Instead stash it in metadata.
151 hostname = arvados_node_fqdn(arvados_node)
152 metadata_req = cloud_node.extra['metadata'].copy()
153 metadata_items = metadata_req.setdefault('items', [])
155 self._find_metadata(metadata_items, 'hostname')['value'] = hostname
157 metadata_items.append({'key': 'hostname', 'value': hostname})
159 self.real.ex_set_node_metadata(cloud_node, metadata_items)
162 def node_fqdn(cls, node):
163 # See sync_node comment.
164 return cls._get_metadata(node.extra['metadata'].get('items', []),
168 def node_start_time(cls, node):
170 return arvados_timestamp(cls._get_metadata(
171 node.extra['metadata']['items'], 'booted_at'))
176 def node_id(cls, node):