Revision fdc94944 snf-cyclades-app/synnefo/api/util.py
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from synnefo.lib.astakos import get_user |
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from synnefo.plankton.backend import ImageBackend |
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from synnefo.db.pools import IPPool |
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from synnefo.settings import MAX_CIDR_BLOCK |
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def get_network_free_address(network): |
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"""Reserve an IP address from the IP Pool of the network. |
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Raises Network.DoesNotExist , IPPool.IPPoolExhausted
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Raises EmptyPool
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""" |
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# Get the Network object in exclusive mode in order to |
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# safely (isolated) reserve an IP address |
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network = Network.objects.select_for_update().get(id=network.id) |
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pool = IPPool(network) |
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address = pool.get_free_address() |
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pool = network.get_pool() |
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address = pool.get() |
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pool.save() |
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return address |
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