Commit b6dd40f5 authored by Apollon Oikonomopoulos's avatar Apollon Oikonomopoulos Committed by Iustin Pop
Browse files

Add _CheckIAllocatorOrNode for common iallocator/node checks



_CheckIAllocatorOrNode will be called by LUs wishing to use an instance
allocator or a target node. It performs sanity checks and will modify the LU's
opcode's iallocator slot to use the cluster-wide allocator if
appropriate.
Signed-off-by: default avatarApollon Oikonomopoulos <apollon@noc.grnet.gr>
Signed-off-by: default avatarIustin Pop <iustin@google.com>
Reviewed-by: default avatarIustin Pop <iustin@google.com>
parent 92be7021
......@@ -1143,6 +1143,38 @@ def _FindFaultyInstanceDisks(cfg, rpc, instance, node_name, prereq):
return faulty
def _CheckIAllocatorOrNode(lu, iallocator_slot, node_slot):
"""Check the sanity of iallocator and node arguments and use the
cluster-wide iallocator if appropriate.
Check that at most one of (iallocator, node) is specified. If none is
specified, then the LU's opcode's iallocator slot is filled with the
cluster-wide default iallocator.
@type iallocator_slot: string
@param iallocator_slot: the name of the opcode iallocator slot
@type node_slot: string
@param node_slot: the name of the opcode target node slot
"""
node = getattr(lu.op, node_slot, None)
iallocator = getattr(lu.op, iallocator_slot, None)
if node is not None and iallocator is not None:
raise errors.OpPrereqError("Do not specify both, iallocator and node.",
errors.ECODE_INVAL)
elif node is None and iallocator is None:
default_iallocator = lu.cfg.GetDefaultIAllocator()
if default_iallocator:
setattr(lu.op, iallocator_slot, default_iallocator)
else:
raise errors.OpPrereqError("No iallocator or node given and no"
" cluster-wide default iallocator found."
" Please specify either an iallocator or a"
" node, or set a cluster-wide default"
" iallocator.")
class LUPostInitCluster(LogicalUnit):
"""Logical unit for running hooks after cluster initialization.
......
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