Synnefo » snf-ganeti

{-# LANGUAGE TemplateHaskell #-}

{-| Implementation of the Ganeti config objects.

Some object fields are not implemented yet, and as such they are

commented out below.

-}

{-

Copyright (C) 2011, 2012 Google Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.

-}

module Ganeti.Objects

  ( NICMode(..)

  , PartialNICParams(..)

  , FilledNICParams(..)

  , fillNICParams

  , PartialNIC(..)

  , DiskMode(..)

  , DiskType(..)

  , DiskLogicalId(..)

  , Disk(..)

  , DiskTemplate(..)

  , PartialBEParams(..)

  , FilledBEParams(..)

  , fillBEParams

  , Hypervisor(..)

  , AdminState(..)

  , adminStateFromRaw

  , Instance(..)

  , toDictInstance

  , PartialNDParams(..)

  , FilledNDParams(..)

  , fillNDParams

  , Node(..)

  , AllocPolicy(..)

  , NodeGroup(..)

  , Cluster(..)

  , ConfigData(..)

  ) where

import Data.Maybe

import Text.JSON (makeObj, showJSON, readJSON, JSON, JSValue(..))

import qualified Text.JSON as J

import qualified Ganeti.Constants as C

import Ganeti.HTools.JSON

import Ganeti.THH

-- * NIC definitions

$(declareSADT "NICMode"

  [ ("NMBridged", 'C.nicModeBridged)

  , ("NMRouted",  'C.nicModeRouted)

  ])

$(makeJSONInstance ''NICMode)

$(buildParam "NIC" "nicp"

  [ simpleField "mode" [t| NICMode |]

  , simpleField "link" [t| String  |]

  ])

$(buildObject "PartialNIC" "nic"

  [ simpleField "mac" [t| String |]

  , optionalField $ simpleField "ip" [t| String |]

  , simpleField "nicparams" [t| PartialNICParams |]

  ])

-- * Disk definitions

$(declareSADT "DiskMode"

  [ ("DiskRdOnly", 'C.diskRdonly)

  , ("DiskRdWr",   'C.diskRdwr)

  ])

$(makeJSONInstance ''DiskMode)

$(declareSADT "DiskType"

  [ ("LD_LV",       'C.ldLv)

  , ("LD_DRBD8",    'C.ldDrbd8)

  , ("LD_FILE",     'C.ldFile)

  , ("LD_BLOCKDEV", 'C.ldBlockdev)

  , ("LD_RADOS",    'C.ldRbd)

  ])

$(makeJSONInstance ''DiskType)

-- | The file driver type.

$(declareSADT "FileDriver"

  [ ("FileLoop",   'C.fdLoop)

  , ("FileBlktap", 'C.fdBlktap)

  ])

$(makeJSONInstance ''FileDriver)

-- | The persistent block driver type. Currently only one type is allowed.

$(declareSADT "BlockDriver"

  [ ("BlockDrvManual", 'C.blockdevDriverManual)

  ])

$(makeJSONInstance ''BlockDriver)

-- | Constant for the dev_type key entry in the disk config.

devType :: String

devType = "dev_type"

-- | The disk configuration type. This includes the disk type itself,

-- for a more complete consistency. Note that since in the Python

-- code-base there's no authoritative place where we document the

-- logical id, this is probably a good reference point.

data DiskLogicalId

  = LIDPlain String String  -- ^ Volume group, logical volume

  | LIDDrbd8 String String Int Int Int String

  -- ^ NodeA, NodeB, Port, MinorA, MinorB, Secret

  | LIDFile FileDriver String -- ^ Driver, path

  | LIDBlockDev BlockDriver String -- ^ Driver, path (must be under /dev)

  | LIDRados String String -- ^ Unused, path

    deriving (Read, Show, Eq)

-- | Mapping from a logical id to a disk type.

lidDiskType :: DiskLogicalId -> DiskType

lidDiskType (LIDPlain {}) = LD_LV

lidDiskType (LIDDrbd8 {}) = LD_DRBD8

lidDiskType (LIDFile  {}) = LD_FILE

lidDiskType (LIDBlockDev {}) = LD_BLOCKDEV

lidDiskType (LIDRados {}) = LD_RADOS

-- | Builds the extra disk_type field for a given logical id.

lidEncodeType :: DiskLogicalId -> [(String, JSValue)]

lidEncodeType v = [(devType, showJSON . lidDiskType $ v)]

-- | Custom encoder for DiskLogicalId (logical id only).

encodeDLId :: DiskLogicalId -> JSValue

encodeDLId (LIDPlain vg lv) = JSArray [showJSON vg, showJSON lv]

encodeDLId (LIDDrbd8 nodeA nodeB port minorA minorB key) =

  JSArray [ showJSON nodeA, showJSON nodeB, showJSON port

          , showJSON minorA, showJSON minorB, showJSON key ]

encodeDLId (LIDRados pool name) = JSArray [showJSON pool, showJSON name]

encodeDLId (LIDFile driver name) = JSArray [showJSON driver, showJSON name]

encodeDLId (LIDBlockDev driver name) = JSArray [showJSON driver, showJSON name]

-- | Custom encoder for DiskLogicalId, composing both the logical id

-- and the extra disk_type field.

encodeFullDLId :: DiskLogicalId -> (JSValue, [(String, JSValue)])

encodeFullDLId v = (encodeDLId v, lidEncodeType v)

-- | Custom decoder for DiskLogicalId. This is manual for now, since

-- we don't have yet automation for separate-key style fields.

decodeDLId :: [(String, JSValue)] -> JSValue -> J.Result DiskLogicalId

decodeDLId obj lid = do

  dtype <- fromObj obj devType

  case dtype of

    LD_DRBD8 ->

      case lid of

        JSArray [nA, nB, p, mA, mB, k] -> do

          nA' <- readJSON nA

          nB' <- readJSON nB

          p'  <- readJSON p

          mA' <- readJSON mA

          mB' <- readJSON mB

          k'  <- readJSON k

          return $ LIDDrbd8 nA' nB' p' mA' mB' k'

        _ -> fail $ "Can't read logical_id for DRBD8 type"

    LD_LV ->

      case lid of

        JSArray [vg, lv] -> do

          vg' <- readJSON vg

          lv' <- readJSON lv

          return $ LIDPlain vg' lv'

        _ -> fail $ "Can't read logical_id for plain type"

    LD_FILE ->

      case lid of

        JSArray [driver, path] -> do

          driver' <- readJSON driver

          path'   <- readJSON path

          return $ LIDFile driver' path'

        _ -> fail $ "Can't read logical_id for file type"

    LD_BLOCKDEV ->

      case lid of

        JSArray [driver, path] -> do

          driver' <- readJSON driver

          path'   <- readJSON path

          return $ LIDBlockDev driver' path'

        _ -> fail $ "Can't read logical_id for blockdev type"

    LD_RADOS ->

      case lid of

        JSArray [driver, path] -> do

          driver' <- readJSON driver

          path'   <- readJSON path

          return $ LIDRados driver' path'

        _ -> fail $ "Can't read logical_id for rdb type"

-- | Disk data structure.

--

-- This is declared manually as it's a recursive structure, and our TH

-- code currently can't build it.

data Disk = Disk

  { diskLogicalId  :: DiskLogicalId

--  , diskPhysicalId :: String

  , diskChildren   :: [Disk]

  , diskIvName     :: String

  , diskSize       :: Int

  , diskMode       :: DiskMode

  } deriving (Read, Show, Eq)

$(buildObjectSerialisation "Disk"

  [ customField 'decodeDLId 'encodeFullDLId $

      simpleField "logical_id"    [t| DiskLogicalId   |]

--  , simpleField "physical_id" [t| String   |]

  , defaultField  [| [] |] $ simpleField "children" [t| [Disk] |]

  , defaultField [| "" |] $ simpleField "iv_name" [t| String |]

  , simpleField "size" [t| Int |]

  , defaultField [| DiskRdWr |] $ simpleField "mode" [t| DiskMode |]

  ])

-- * Hypervisor definitions

-- | This may be due to change when we add hypervisor parameters.

$(declareSADT "Hypervisor"

  [ ( "Kvm",    'C.htKvm )

  , ( "XenPvm", 'C.htXenPvm )

  , ( "Chroot", 'C.htChroot )

  , ( "XenHvm", 'C.htXenHvm )

  , ( "Lxc",    'C.htLxc )

  , ( "Fake",   'C.htFake )

  ])

$(makeJSONInstance ''Hypervisor)

-- * Instance definitions

-- | Instance disk template type. **Copied from HTools/Types.hs**

$(declareSADT "DiskTemplate"

  [ ("DTDiskless",   'C.dtDiskless)

  , ("DTFile",       'C.dtFile)

  , ("DTSharedFile", 'C.dtSharedFile)

  , ("DTPlain",      'C.dtPlain)

  , ("DTBlock",      'C.dtBlock)

  , ("DTDrbd8",      'C.dtDrbd8)

  ])

$(makeJSONInstance ''DiskTemplate)

$(declareSADT "AdminState"

  [ ("AdminOffline", 'C.adminstOffline)

  , ("AdminDown",    'C.adminstDown)

  , ("AdminUp",      'C.adminstUp)

  ])

$(makeJSONInstance ''AdminState)

$(buildParam "BE" "bep" $

  [ simpleField "minmem"       [t| Int  |]

  , simpleField "maxmem"       [t| Int  |]

  , simpleField "vcpus"        [t| Int  |]

  , simpleField "auto_balance" [t| Bool |]

  ])

$(buildObject "Instance" "inst" $

  [ simpleField "name"           [t| String             |]

  , simpleField "primary_node"   [t| String             |]

  , simpleField "os"             [t| String             |]

  , simpleField "hypervisor"     [t| String             |]

--  , simpleField "hvparams"     [t| [(String, String)] |]

  , simpleField "beparams"       [t| PartialBEParams |]

--  , simpleField "osparams"     [t| [(String, String)] |]

  , simpleField "admin_state"    [t| AdminState         |]

  , simpleField "nics"           [t| [PartialNIC]              |]

  , simpleField "disks"          [t| [Disk]             |]

  , simpleField "disk_template"  [t| DiskTemplate       |]

  , optionalField $ simpleField "network_port" [t| Int |]

  ]

  ++ timeStampFields

  ++ uuidFields

  ++ serialFields)

-- * Node definitions

$(buildParam "ND" "ndp" $

  [ simpleField "oob_program" [t| String |]

  ])

$(buildObject "Node" "node" $

  [ simpleField "name"             [t| String |]

  , simpleField "primary_ip"       [t| String |]

  , simpleField "secondary_ip"     [t| String |]

  , simpleField "master_candidate" [t| Bool   |]

  , simpleField "offline"          [t| Bool   |]

  , simpleField "drained"          [t| Bool   |]

  , simpleField "group"            [t| String |]

  , simpleField "master_capable"   [t| Bool   |]

  , simpleField "vm_capable"       [t| Bool   |]

--  , simpleField "ndparams"       [t| PartialNDParams |]

  , simpleField "powered"          [t| Bool   |]

  ]

  ++ timeStampFields

  ++ uuidFields

  ++ serialFields)

-- * NodeGroup definitions

-- | The Group allocation policy type.

--

-- Note that the order of constructors is important as the automatic

-- Ord instance will order them in the order they are defined, so when

-- changing this data type be careful about the interaction with the

-- desired sorting order.

--

-- FIXME: COPIED from Types.hs; we need to eliminate this duplication later

$(declareSADT "AllocPolicy"

  [ ("AllocPreferred",   'C.allocPolicyPreferred)

  , ("AllocLastResort",  'C.allocPolicyLastResort)

  , ("AllocUnallocable", 'C.allocPolicyUnallocable)

  ])

$(makeJSONInstance ''AllocPolicy)

$(buildObject "NodeGroup" "group" $

  [ simpleField "name"         [t| String |]

  , defaultField  [| [] |] $ simpleField "members" [t| [String] |]

--  , simpleField "ndparams"   [t| PartialNDParams |]

  , simpleField "alloc_policy" [t| AllocPolicy |]

  ]

  ++ timeStampFields

  ++ uuidFields

  ++ serialFields)

-- * Cluster definitions

$(buildObject "Cluster" "cluster" $

  [ simpleField "rsahostkeypub"             [t| String   |]

  , simpleField "highest_used_port"         [t| Int      |]

  , simpleField "tcpudp_port_pool"          [t| [Int]    |]

  , simpleField "mac_prefix"                [t| String   |]

  , simpleField "volume_group_name"         [t| String   |]

  , simpleField "reserved_lvs"              [t| [String] |]

--  , simpleField "drbd_usermode_helper"      [t| String   |]

-- , simpleField "default_bridge"          [t| String   |]

-- , simpleField "default_hypervisor"      [t| String   |]

  , simpleField "master_node"               [t| String   |]

  , simpleField "master_ip"                 [t| String   |]

  , simpleField "master_netdev"             [t| String   |]

-- , simpleField "master_netmask"          [t| String   |]

  , simpleField "cluster_name"              [t| String   |]

  , simpleField "file_storage_dir"          [t| String   |]

-- , simpleField "shared_file_storage_dir" [t| String   |]

  , simpleField "enabled_hypervisors"       [t| [String] |]

-- , simpleField "hvparams"                [t| [(String, [(String, String)])] |]

-- , simpleField "os_hvp"                  [t| [(String, String)] |]

  , simpleField "beparams" [t| Container FilledBEParams |]

-- , simpleField "osparams"                [t| [(String, String)] |]

  , simpleField "nicparams" [t| Container FilledNICParams    |]

--  , simpleField "ndparams"                  [t| FilledNDParams |]

  , simpleField "candidate_pool_size"       [t| Int                |]

  , simpleField "modify_etc_hosts"          [t| Bool               |]

  , simpleField "modify_ssh_setup"          [t| Bool               |]

  , simpleField "maintain_node_health"      [t| Bool               |]

  , simpleField "uid_pool"                  [t| [Int]              |]

  , simpleField "default_iallocator"        [t| String             |]

  , simpleField "hidden_os"                 [t| [String]           |]

  , simpleField "blacklisted_os"            [t| [String]           |]

  , simpleField "primary_ip_family"         [t| Int                |]

  , simpleField "prealloc_wipe_disks"       [t| Bool               |]

 ]

 ++ serialFields

 ++ timeStampFields

 ++ uuidFields

 ++ tagsFields)

-- * ConfigData definitions

$(buildObject "ConfigData" "config" $

--  timeStampFields ++

  [ simpleField "version"    [t| Int                 |]

  , simpleField "cluster"    [t| Cluster             |]

  , simpleField "nodes"      [t| Container Node      |]

  , simpleField "nodegroups" [t| Container NodeGroup |]

  , simpleField "instances"  [t| Container Instance  |]

  ]

  ++ serialFields)