1 {-| Module describing a node group.
7 Copyright (C) 2010, 2011, 2012 Google Inc.
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17 General Public License for more details.
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26 module Ganeti.HTools.Group
36 import qualified Ganeti.HTools.Container as Container
38 import qualified Ganeti.HTools.Types as T
40 -- * Type declarations
42 -- | The node group type.
44 { name :: String -- ^ The node name
45 , uuid :: T.GroupID -- ^ The UUID of the group
46 , idx :: T.Gdx -- ^ Internal index for book-keeping
47 , allocPolicy :: T.AllocPolicy -- ^ The allocation policy for this group
48 , iPolicy :: T.IPolicy -- ^ The instance policy for this group
49 , allTags :: [String] -- ^ The tags for this group
52 -- Note: we use the name as the alias, and the UUID as the official
54 instance T.Element Group where
59 allNames n = [name n, uuid n]
61 -- | A simple name for the int, node association list.
62 type AssocList = [(T.Gdx, Group)]
64 -- | A simple name for a node map.
65 type List = Container.Container Group
67 -- * Initialization functions
69 -- | Create a new group.
70 create :: String -> T.GroupID -> T.AllocPolicy -> T.IPolicy -> [String] -> Group
71 create name_init id_init apol_init ipol_init tags_init =
72 Group { name = name_init
74 , allocPolicy = apol_init
80 -- | Sets the group index.
82 -- This is used only during the building of the data structures.
83 setIdx :: Group -> T.Gdx -> Group
84 setIdx t i = t {idx = i}
86 -- | Changes the alias.
88 -- This is used only during the building of the data structures.
89 setName :: Group -> String -> Group
90 setName t s = t { name = s }
92 -- | Checks if a group is allocable.
93 isAllocable :: Group -> Bool
94 isAllocable = (/= T.AllocUnallocable) . allocPolicy