118 lines
3.7 KiB
Python
118 lines
3.7 KiB
Python
# Copyright 2011 Quanta Research Cambridge, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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class ClusterState(object):
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"""A class to store the state of various persistent objects in the Nova
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cluster, e.g. instances, volumes. Use methods to query to state which than
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can be compared to the current state of the objects in Nova.
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"""
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def __init__(self, **kwargs):
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self._max_vms = kwargs.get('max_vms', 32)
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self._instances = {}
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self._floating_ips = []
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self._keypairs = []
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self._volumes = []
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# instance state methods
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def get_instances(self):
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"""return the instances dictionary that we believe are in cluster."""
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return self._instances
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def get_max_instances(self):
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"""return the maximum number of instances we can create."""
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return self._max_vms
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def set_instance_state(self, key, val):
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"""Store `val` in the dictionary indexed at `key`."""
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self._instances[key] = val
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def delete_instance_state(self, key):
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"""Delete state indexed at `key`."""
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del self._instances[key]
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#floating_ip state methods
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def get_floating_ips(self):
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"""return the floating ips list for the cluster."""
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return self._floating_ips
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def add_floating_ip(self, floating_ip_state):
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"""Add floating ip."""
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self._floating_ips.append(floating_ip_state)
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def remove_floating_ip(self, floating_ip_state):
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"""Remove floating ip."""
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self._floating_ips.remove(floating_ip_state)
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# keypair methods
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def get_keypairs(self):
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"""return the keypairs list for the cluster."""
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return self._keypairs
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def add_keypair(self, keypair_state):
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"""Add keypair."""
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self._keypairs.append(keypair_state)
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def remove_keypair(self, keypair_state):
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"""Remove keypair."""
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self._keypairs.remove(keypair_state)
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# volume methods
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def get_volumes(self):
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"""return the volumes list for the cluster."""
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return self._volumes
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def add_volume(self, volume_state):
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"""Add volume."""
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self._volumes.append(volume_state)
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def remove_volume(self, volume_state):
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"""Remove volume."""
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self._volumes.remove(volume_state)
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class ServerAssociatedState(object):
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"""Class that tracks resources that are associated with a particular server
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such as a volume or floating ip.
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"""
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def __init__(self, resource_id):
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# The id of the server.
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self.server_id = None
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# The id of the resource that is attached to the server.
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self.resource_id = resource_id
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# True if in the process of attaching/detaching the resource.
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self.change_pending = False
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class FloatingIpState(ServerAssociatedState):
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def __init__(self, ip_desc):
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super(FloatingIpState, self).__init__(ip_desc['id'])
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self.address = ip_desc['ip']
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class VolumeState(ServerAssociatedState):
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def __init__(self, volume_desc):
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super(VolumeState, self).__init__(volume_desc['id'])
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class KeyPairState(object):
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def __init__(self, keypair_spec):
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self.name = keypair_spec['name']
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self.private_key = keypair_spec['private_key']
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