Revision 1e89a135 lib/cmdlib.py

b/lib/cmdlib.py
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    # Check for hypervisor version mismatch and warn the user.
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    nodeinfo = self.rpc.call_node_info([source_node, target_node],
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                                       None, [self.instance.hypervisor])
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    for ninfo in nodeinfo.items():
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    for ninfo in nodeinfo.values():
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      ninfo.Raise("Unable to retrieve node information from node '%s'" %
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                  ninfo.node)
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    (_, _, (src_info, )) = nodeinfo[source_node].payload
......
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            current_mem = 0
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          #TODO(dynmem): do the appropriate check involving MINMEM
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          miss_mem = (be_new[constants.BE_MAXMEM] - current_mem -
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                      pninfo.payload["memory_free"])
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                      pnhvinfo["memory_free"])
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          if miss_mem > 0:
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            raise errors.OpPrereqError("This change will prevent the instance"
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                                       " from starting, due to %d MB of memory"

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