1 {-| Module describing a node group.
7 Copyright (C) 2010, 2011 Google Inc.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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 } deriving (Show, Read, Eq)
50 -- Note: we use the name as the alias, and the UUID as the official
52 instance T.Element Group where
57 allNames n = [name n, uuid n]
59 -- | A simple name for the int, node association list.
60 type AssocList = [(T.Gdx, Group)]
62 -- | A simple name for a node map.
63 type List = Container.Container Group
65 -- * Initialization functions
67 -- | Create a new group.
68 create :: String -> T.GroupID -> T.AllocPolicy -> Group
69 create name_init id_init apol_init =
70 Group { name = name_init
72 , allocPolicy = apol_init
76 -- This is used only during the building of the data structures.
77 setIdx :: Group -> T.Gdx -> Group
78 setIdx t i = t {idx = i}
80 -- | Changes the alias.
82 -- This is used only during the building of the data structures.
83 setName :: Group -> String -> Group
84 setName t s = t { name = s }
86 -- | Checks if a group is allocable.
87 isAllocable :: Group -> Bool
88 isAllocable = (/= T.AllocUnallocable) . allocPolicy