Revision a5f248ac
| b/htools/Ganeti/HTools/Cluster.hs | ||
|---|---|---|
| 61 | 61 |
, tryAlloc |
| 62 | 62 |
, tryMGAlloc |
| 63 | 63 |
, tryReloc |
| 64 |
, tryMGReloc |
|
| 65 | 64 |
, tryEvac |
| 66 |
, tryMGEvac |
|
| 67 | 65 |
, tryNodeEvac |
| 68 | 66 |
, tryChangeGroup |
| 69 | 67 |
, collapseFailures |
| ... | ... | |
| 634 | 632 |
-- elements of the tuple |
| 635 | 633 |
in nsols `seq` nsuc `seq` as { asAllocs = nsuc, asSolutions = nsols }
|
| 636 | 634 |
|
| 637 |
-- | Sums two allocation solutions (e.g. for two separate node groups). |
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sumAllocs :: AllocSolution -> AllocSolution -> AllocSolution |
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sumAllocs (AllocSolution af aa as al) (AllocSolution bf ba bs bl) = |
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AllocSolution (af ++ bf) (aa + ba) (as ++ bs) (al ++ bl) |
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| 641 |
|
|
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-- | Given a solution, generates a reasonable description for it. |
| 643 | 636 |
describeSolution :: AllocSolution -> String |
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describeSolution as = |
| ... | ... | |
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\destinations required (" ++ show reqn ++
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| 821 | 814 |
"), only one supported" |
| 822 | 815 |
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| 823 |
tryMGReloc :: (Monad m) => |
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Group.List -- ^ The group list |
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-> Node.List -- ^ The node list |
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-> Instance.List -- ^ The instance list |
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-> Idx -- ^ The index of the instance to move |
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-> Int -- ^ The number of nodes required |
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-> [Ndx] -- ^ Nodes which should not be used |
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-> m AllocSolution -- ^ Solution list |
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tryMGReloc _ mgnl mgil xid ncount ex_ndx = do |
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let groups = splitCluster mgnl mgil |
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-- TODO: we only relocate inside the group for now |
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inst = Container.find xid mgil |
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(nl, il) <- case lookup (instancePriGroup mgnl inst) groups of |
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Nothing -> fail $ "Cannot find group for instance " ++ |
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Instance.name inst |
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| 838 |
Just v -> return v |
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tryReloc nl il xid ncount ex_ndx |
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| 840 |
|
|
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-- | Change an instance's secondary node. |
| 842 | 817 |
evacInstance :: (Monad m) => |
| 843 | 818 |
[Ndx] -- ^ Excluded nodes |
| ... | ... | |
| 877 | 852 |
(_, sol) <- foldM (evacInstance ex_ndx il) (nl, emptyAllocSolution) idxs |
| 878 | 853 |
return sol |
| 879 | 854 |
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| 880 |
-- | Multi-group evacuation of a list of nodes. |
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tryMGEvac :: (Monad m) => |
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Group.List -- ^ The group list |
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-> Node.List -- ^ The node list |
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-> Instance.List -- ^ The instance list |
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-> [Ndx] -- ^ Nodes to be evacuated |
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-> m AllocSolution -- ^ Solution list |
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tryMGEvac _ nl il ex_ndx = |
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let ex_nodes = map (`Container.find` nl) ex_ndx |
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all_insts = nub . concatMap Node.sList $ ex_nodes |
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all_insts' = associateIdxs all_insts $ splitCluster nl il |
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in do |
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results <- mapM (\(_, (gnl, gil, idxs)) -> tryEvac gnl gil idxs ex_ndx) |
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all_insts' |
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let sol = foldl' sumAllocs emptyAllocSolution results |
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return $ annotateSolution sol |
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|
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-- | Function which fails if the requested mode is change secondary. |
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-- |
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-- This is useful since except DRBD, no other disk template can |
| ... | ... | |
| 1426 | 1384 |
instances = Container.filter ((`elem` nidxs) . Instance.pNode) il |
| 1427 | 1385 |
in (guuid, (Container.fromList nodes', instances))) ngroups |
| 1428 | 1386 |
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-- | Split a global instance index map into per-group, and associate |
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-- it with the group/node/instance lists. |
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associateIdxs :: [Idx] -- ^ Instance indices to be split/associated |
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-> [(Gdx, (Node.List, Instance.List))] -- ^ Input groups |
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-> [(Gdx, (Node.List, Instance.List, [Idx]))] -- ^ Result |
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associateIdxs idxs = |
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map (\(gdx, (nl, il)) -> |
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(gdx, (nl, il, filter (`Container.member` il) idxs))) |
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|
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-- | Compute the list of nodes that are to be evacuated, given a list |
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-- of instances and an evacuation mode. |
| 1440 | 1389 |
nodesToEvacuate :: Instance.List -- ^ The cluster-wide instance list |
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