Extend AffinityWeigher to support shards. #306
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Handled if weight < 1 is returned from _weigh_object, in case of ServerGroupSoftAntiAffinityWeigher. |
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ServerGroupAffinityWeigher gives back a high weight if the compute node already contains servers of the same server-group. However, we want to add a semi-high weight when other compute nodes in the same shard contain servers of this server-group. Usecase is to give the user a way to schedule servers to the same shard based on previously spawned servers e.g. to replace them with the new ones. If the servers are in the same shard, there's no automatic volume-migration happening.
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ServerGroupAffinityWeigher gives back a high weight if the compute node
already contains servers of the same server-group. However, we want to
add a semi-high weight when other compute nodes in the same shard
contain servers of this server-group.
Usecase is to give the user a way to schedule servers to the same shard
based on previously spawned servers e.g. to replace them with the new
ones. If the servers are in the same shard, there's no automatic
volume-migration happening.