root / src / Ganeti / ConstantUtils.hs @ e1235448
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{-| ConstantUtils contains the helper functions for constants |
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This module cannot be merged with 'Ganeti.Utils' because it would |
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create a circular dependency if imported, for example, from |
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'Ganeti.Constants'. |
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-} |
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{- |
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Copyright (C) 2013 Google Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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02110-1301, USA. |
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-} |
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module Ganeti.ConstantUtils where |
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import Data.Char (ord) |
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import Data.Set (Set) |
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import qualified Data.Set as Set (difference, fromList, toList, union) |
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import Ganeti.THH (PyValue(..)) |
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import Ganeti.PyValueInstances () |
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-- | 'PythonChar' wraps a Python 'char' |
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newtype PythonChar = PythonChar { unPythonChar :: Char } |
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deriving (Show) |
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instance PyValue PythonChar where |
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showValue c = "chr(" ++ show (ord (unPythonChar c)) ++ ")" |
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-- | 'PythonNone' wraps Python 'None' |
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data PythonNone = PythonNone |
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instance PyValue PythonNone where |
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showValue _ = "None" |
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-- | FrozenSet wraps a Haskell 'Set' |
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-- |
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-- See 'PyValue' instance for 'FrozenSet'. |
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newtype FrozenSet a = FrozenSet { unFrozenSet :: Set a } |
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deriving (Eq, Ord, Show) |
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-- | Converts a Haskell 'Set' into a Python 'frozenset' |
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-- |
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-- This instance was supposed to be for 'Set' instead of 'FrozenSet'. |
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-- However, 'ghc-6.12.1' seems to be crashing with 'segmentation |
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-- fault' due to the presence of more than one instance of 'Set', |
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-- namely, this one and the one in 'Ganeti.OpCodes'. For this reason, |
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-- we wrap 'Set' into 'FrozenSet'. |
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instance PyValue a => PyValue (FrozenSet a) where |
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showValue s = "frozenset(" ++ showValue (Set.toList (unFrozenSet s)) ++ ")" |
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mkSet :: Ord a => [a] -> FrozenSet a |
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mkSet = FrozenSet . Set.fromList |
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toList :: FrozenSet a -> [a] |
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toList = Set.toList . unFrozenSet |
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union :: Ord a => FrozenSet a -> FrozenSet a -> FrozenSet a |
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union x y = FrozenSet (unFrozenSet x `Set.union` unFrozenSet y) |
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difference :: Ord a => FrozenSet a -> FrozenSet a -> FrozenSet a |
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difference x y = FrozenSet (unFrozenSet x `Set.difference` unFrozenSet y) |
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-- | 'Protocol' represents the protocols used by the daemons |
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data Protocol = Tcp | Udp |
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deriving (Show) |
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-- | 'PyValue' instance of 'Protocol' |
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-- |
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-- This instance is used by the Haskell to Python constants |
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instance PyValue Protocol where |
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showValue Tcp = "\"tcp\"" |
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showValue Udp = "\"udp\"" |
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-- | Failure exit code |
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-- |
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-- These are defined here and not in 'Ganeti.Constants' together with |
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-- the other exit codes in order to avoid a circular dependency |
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-- between 'Ganeti.Constants' and 'Ganeti.Runtime' |
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exitFailure :: Int |
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exitFailure = 1 |
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-- | Console device |
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-- |
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-- This is defined here and not in 'Ganeti.Constants' order to avoid a |
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-- circular dependency between 'Ganeti.Constants' and 'Ganeti.Logging' |
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devConsole :: String |
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devConsole = "/dev/console" |
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-- | Random uuid generator |
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-- |
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-- This is defined here and not in 'Ganeti.Constants' order to avoid a |
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-- circular dependendy between 'Ganeti.Constants' and 'Ganeti.Types' |
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randomUuidFile :: String |
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randomUuidFile = "/proc/sys/kernel/random/uuid" |
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-- * Priority levels |
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-- |
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-- This is defined here and not in 'Ganeti.Types' in order to avoid a |
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-- GHC stage restriction and because there is no suitable 'declareADT' |
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-- variant that handles integer values directly. |
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priorityLow :: Int |
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priorityLow = 10 |
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priorityNormal :: Int |
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priorityNormal = 0 |
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priorityHigh :: Int |
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priorityHigh = -10 |
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-- | Calculates int version number from major, minor and revision |
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-- numbers. |
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buildVersion :: Int -> Int -> Int -> Int |
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buildVersion major minor revision = |
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1000000 * major + 10000 * minor + 1 * revision |
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-- | Confd protocol version |
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-- |
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-- This is defined here in order to avoid a circular dependency |
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-- between 'Ganeti.Confd.Types' and 'Ganeti.Constants'. |
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confdProtocolVersion :: Int |
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confdProtocolVersion = 1 |
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-- * Confd request query fields |
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-- |
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-- These are defined here and not in 'Ganeti.Types' due to GHC stage |
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-- restrictions concerning Template Haskell. They are also not |
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-- defined in 'Ganeti.Constants' in order to avoid a circular |
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-- dependency between that module and 'Ganeti.Types'. |
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confdReqqLink :: String |
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confdReqqLink = "0" |
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confdReqqIp :: String |
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confdReqqIp = "1" |
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confdReqqIplist :: String |
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confdReqqIplist = "2" |
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confdReqqFields :: String |
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confdReqqFields = "3" |
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-- * ISpec |
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ispecMemSize :: String |
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ispecMemSize = "memory-size" |
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ispecCpuCount :: String |
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ispecCpuCount = "cpu-count" |
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ispecDiskCount :: String |
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ispecDiskCount = "disk-count" |
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ispecDiskSize :: String |
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ispecDiskSize = "disk-size" |
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ispecNicCount :: String |
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ispecNicCount = "nic-count" |
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ispecSpindleUse :: String |
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ispecSpindleUse = "spindle-use" |
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ispecsMinmax :: String |
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ispecsMinmax = "minmax" |
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ispecsStd :: String |
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ispecsStd = "std" |
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ipolicyDts :: String |
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ipolicyDts = "disk-templates" |
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ipolicyVcpuRatio :: String |
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ipolicyVcpuRatio = "vcpu-ratio" |
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ipolicySpindleRatio :: String |
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ipolicySpindleRatio = "spindle-ratio" |
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ipolicyDefaultsVcpuRatio :: Double |
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ipolicyDefaultsVcpuRatio = 4.0 |
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ipolicyDefaultsSpindleRatio :: Double |
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ipolicyDefaultsSpindleRatio = 32.0 |