Safe Haskell	None

Ganeti.HTools.Cluster.Moves

Description

Implementation of instance moves in a cluster.

Synopsis

instanceNodes :: List -> Instance -> (Ndx, Ndx, Node, Node)
setInstanceLocationScore :: Instance -> Node -> Maybe Node -> Instance
applyMoveEx :: Bool -> List -> Instance -> IMove -> OpResult (List, Instance, Ndx, Ndx)
move :: (List, List) -> (Idx, IMove) -> OpResult (List, List)

Documentation

instanceNodes :: List -> Instance -> (Ndx, Ndx, Node, Node) Source #

Extracts the node pairs for an instance. This can fail if the instance is single-homed. FIXME: this needs to be improved, together with the general enhancement for handling non-DRBD moves.

setInstanceLocationScore Source #

Arguments

:: Instance	the original instance
-> Node	the primary node of the ^ instance
-> Maybe Node	the secondary node of the ^ instance
-> Instance	the instance with the location score updated

Sets the location score of an instance, given its primary and secondary node.

applyMoveEx Source #

Arguments

:: Bool	whether to ignore soft errors
-> List
-> Instance
-> IMove
-> OpResult (List, Instance, Ndx, Ndx)

Applies an instance move to a given node list and instance.

move :: (List, List) -> (Idx, IMove) -> OpResult (List, List) Source #

Apply a move to an instance, ignoring soft errors. This is a variant of `applyMoveEx True` suitable for folding.