def get_resource(self, key, extras):
"""
Retrieve one resource
"""
context = extras['nova_ctx']
try:
(loc, identifier) = key.rsplit('/', 1)
except ValueError:
raise AttributeError("Unexpected format for key %s" % key)
loc = loc + '/'
LOG.debug("Getting resource at %s with id: %s", loc, identifier)
try:
# XXX should use regular expressions?
if loc == infrastructure.COMPUTE.location:
compute_vm = vm.get_vm(identifier, context)
return self._construct_occi_compute(compute_vm, extras)
elif loc == infrastructure.STORAGE.location:
vol = storage.get_storage(identifier, context)
return self._construct_occi_storage(vol, extras)
elif loc in [infrastructure.STORAGELINK.location,
infrastructure.NETWORKINTERFACE.location]:
(compute_id, other_id) = identifier.split('_', 1)
compute_vm = vm.get_vm(compute_id, context)
occi_vm = self._construct_occi_compute(compute_vm, extras)
# look for the link
for link in occi_vm.links:
if link.identifier == key:
return link
elif loc == infrastructure.NETWORK.location:
return self.nets[identifier]
except exceptions.HTTPError:
# the nova_glue did not find the resource, just ignore
pass
# not found!
raise KeyError(key)
def create(self, entity, extras):
"""
Creates a new volume.
"""
context = extras['nova_ctx']
if 'occi.storage.size' not in entity.attributes:
raise AttributeError('size attribute not found!')
size = entity.attributes['occi.storage.size']
name = ''
if 'occi.core.title' not in entity.attributes:
name = str(uuid.uuid4())
else:
name = entity.attributes['occi.core.title']
new_volume = storage.create_storage(size, name, context)
vol_id = new_volume['id']
# Work around problem that instance is lazy-loaded...
new_volume = storage.get_storage(vol_id, context)
if new_volume['status'] == 'error':
raise exceptions.HTTPError(500, 'There was an error creating the '
'volume')
entity.attributes['occi.core.id'] = str(vol_id)
entity.identifier = infrastructure.STORAGE.location + vol_id
if new_volume['status'] == 'available':
entity.attributes['occi.storage.state'] = 'active'
entity.actions = [infrastructure.OFFLINE, infrastructure.BACKUP,
infrastructure.SNAPSHOT, infrastructure.RESIZE]
def create(self, entity, extras):
"""
Creates a new volume.
"""
context = extras['nova_ctx']
if 'occi.storage.size' not in entity.attributes:
raise AttributeError('size attribute not found!')
new_volume = storage.create_storage(
entity.attributes['occi.storage'
'.size'], context)
vol_id = new_volume['id']
# Work around problem that instance is lazy-loaded...
new_volume = storage.get_storage(vol_id, context)
if new_volume['status'] == 'error':
raise exceptions.HTTPError(
500, 'There was an error creating the '
'volume')
entity.attributes['occi.core.id'] = str(vol_id)
entity.identifier = infrastructure.STORAGE.location + vol_id
if new_volume['status'] == 'available':
entity.attributes['occi.storage.state'] = 'active'
entity.actions = [
infrastructure.OFFLINE, infrastructure.BACKUP,
infrastructure.SNAPSHOT, infrastructure.RESIZE
]
def delete(self, link, extras):
"""
Unlinks the the compute from the storage resource.
"""
instance_id = link.source.attributes['occi.core.id']
volume_id = link.target.attributes['occi.core.id']
volume = storage.get_storage(volume_id, extras['nova_ctx'])
vm.detach_volume(instance_id, volume, extras['nova_ctx'])
def delete(self, link, extras):
"""
Unlinks the the compute from the storage resource.
"""
instance_id = link.source.attributes['occi.core.id']
volume_id = link.target.attributes['occi.core.id']
volume = storage.get_storage(volume_id, extras['nova_ctx'])
vm.detach_volume(instance_id, volume, extras['nova_ctx'])
def retrieve(self, entity, extras):
"""
Gets a representation of the storage volume and presents it ready for
rendering by pyssf.
"""
v_id = entity.attributes['occi.core.id']
volume = storage.get_storage(v_id, extras['nova_ctx'])
entity.attributes['occi.storage.size'] = str(float(volume['size']))
# OS volume states:
# available, creating, deleting, in-use, error, error_deleting
if volume['status'] == 'available' or volume['status'] == 'in-use':
entity.attributes['occi.storage.state'] = 'online'
entity.actions = [infrastructure.OFFLINE, infrastructure.BACKUP,
infrastructure.SNAPSHOT, infrastructure.RESIZE]
else:
entity.attributes['occi.storage.state'] = 'offline'
entity.actions = [infrastructure.ONLINE]
def retrieve(self, entity, extras):
"""
Gets a representation of the storage volume and presents it ready for
rendering by pyssf.
"""
v_id = entity.attributes['occi.core.id']
volume = storage.get_storage(v_id, extras['nova_ctx'])
entity.attributes['occi.storage.size'] = str(float(volume['size']))
# OS volume states:
# available, creating, deleting, in-use, error, error_deleting
if volume['status'] == 'available' or volume['status'] == 'in-use':
entity.attributes['occi.storage.state'] = 'online'
entity.actions = [
infrastructure.OFFLINE, infrastructure.BACKUP,
infrastructure.SNAPSHOT, infrastructure.RESIZE
]
else:
entity.attributes['occi.storage.state'] = 'offline'
entity.actions = [infrastructure.ONLINE]
def _construct_occi_storage(self, identifier, extras):
"""
Construct a OCCI storage instance.
First item in result list is entity self!
Adds it to the cache too!
"""
result = []
context = extras['nova_ctx']
stor = storage.get_storage(identifier, context)
# id, display_name, size, status
iden = infrastructure.STORAGE.location + identifier
entity = core_model.Resource(iden, infrastructure.STORAGE, [])
result.append(entity)
# core.id and cache it!
entity.attributes['occi.core.id'] = identifier
entity.extras = self.get_extras(extras)
self.cache[(entity.identifier, context.user_id)] = entity
return result
def _construct_occi_storage(self, identifier, extras):
"""
Construct a OCCI storage instance.
First item in result list is entity self!
Adds it to the cache too!
"""
result = []
context = extras['nova_ctx']
stor = storage.get_storage(identifier, context)
# id, display_name, size, status
iden = infrastructure.STORAGE.location + identifier
entity = core_model.Resource(iden, infrastructure.STORAGE, [])
result.append(entity)
# create links on VM resources
if stor['status'] == 'in-use':
source = self.get_resource(infrastructure.COMPUTE.location +
str(stor['instance_uuid']), extras)
link = core_model.Link(infrastructure.STORAGELINK.location +
str(uuid.uuid4()),
infrastructure.STORAGELINK, [], source,
entity)
link.extras = self.get_extras(extras)
source.links.append(link)
result.append(link)
self.cache[(link.identifier, context.user_id)] = link
# core.id and cache it!
entity.attributes['occi.core.id'] = identifier
entity.extras = self.get_extras(extras)
self.cache[(entity.identifier, context.user_id)] = entity
return result
def _construct_occi_storage(self, identifier, extras):
"""
Construct a OCCI storage instance.
First item in result list is entity self!
Adds it to the cache too!
"""
result = []
context = extras['nova_ctx']
stor = storage.get_storage(identifier, context)
# id, display_name, size, status
iden = infrastructure.STORAGE.location + identifier
entity = core_model.Resource(iden, infrastructure.STORAGE, [])
result.append(entity)
# create links on VM resources
if stor['status'] == 'in-use':
source = self.get_resource(
infrastructure.COMPUTE.location + str(stor['instance_uuid']),
extras)
link = core_model.Link(
infrastructure.STORAGELINK.location + str(uuid.uuid4()),
infrastructure.STORAGELINK, [], source, entity)
link.extras = self.get_extras(extras)
source.links.append(link)
result.append(link)
self.cache[(link.identifier, context.user_id)] = link
# core.id and cache it!
entity.attributes['occi.core.id'] = identifier
entity.extras = self.get_extras(extras)
self.cache[(entity.identifier, context.user_id)] = entity
return result
