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 super(ComputeNodeDriver, self).__init__(
35 auth_kwargs, list_kwargs, create_kwargs,
39 def _name_key(cloud_object):
40 return cloud_object.name
42 def _init_image(self, image_name):
43 return 'image', self.search_for(
44 image_name, 'list_images', self._name_key)
46 def _init_network(self, network_name):
47 return 'ex_network', self.search_for(
48 network_name, 'ex_list_networks', self._name_key)
50 def _init_service_accounts(self, service_accounts_str):
51 return 'ex_service_accounts', json.loads(service_accounts_str)
53 def _init_ssh_key(self, filename):
54 # SSH keys are delivered to GCE nodes via ex_metadata: see
55 # http://stackoverflow.com/questions/26752617/creating-sshkeys-for-gce-instance-using-libcloud
56 with open(filename) as ssh_file:
57 self.create_kwargs['ex_metadata']['sshKeys'] = (
58 'root:' + ssh_file.read().strip())
60 def arvados_create_kwargs(self, arvados_node):
61 cluster_id, _, node_id = arvados_node['uuid'].split('-')
62 result = {'name': 'compute-{}-{}'.format(node_id, cluster_id),
63 'ex_metadata': self.create_kwargs['ex_metadata'].copy(),
64 'ex_tags': list(self.node_tags)}
65 result['ex_metadata']['arv-ping-url'] = self._make_ping_url(
67 result['ex_metadata']['booted_at'] = time.strftime(ARVADOS_TIMEFMT,
69 result['ex_metadata']['hostname'] = arvados_node_fqdn(arvados_node)
73 # The GCE libcloud driver only supports filtering node lists by zone.
74 # Do our own filtering based on tag list.
75 return [node for node in
76 super(ComputeNodeDriver, self).list_nodes()
77 if self.node_tags.issubset(node.extra.get('tags', []))]
80 def _find_metadata(cls, metadata_items, key):
81 # Given a list of two-item metadata dictonaries, return the one with
82 # the named key. Raise KeyError if not found.
84 return next(data_dict for data_dict in metadata_items
85 if data_dict.get('key') == key)
90 def _get_metadata(cls, metadata_items, key, *default):
92 return cls._find_metadata(metadata_items, key)['value']
98 def sync_node(self, cloud_node, arvados_node):
99 hostname = arvados_node_fqdn(arvados_node)
100 metadata_req = cloud_node.extra['metadata'].copy()
101 metadata_items = metadata_req.setdefault('items', [])
103 self._find_metadata(metadata_items, 'hostname')['value'] = hostname
105 metadata_items.append({'key': 'hostname', 'value': hostname})
106 response = self.real.connection.async_request(
107 '/zones/{}/instances/{}/setMetadata'.format(
108 cloud_node.extra['zone'].name, cloud_node.name),
109 method='POST', data=metadata_req)
110 if not response.success():
111 raise Exception("setMetadata error: {}".format(response.error))
114 def node_start_time(cls, node):
116 return arvados_timestamp(cls._get_metadata(
117 node.extra['metadata']['items'], 'booted_at'))