Safe Haskell	None

Ganeti.Locking.Locks

Description

Ganeti lock structure

Synopsis

data GanetiLocks
- = ClusterLockSet
- | BGL
- | InstanceLockSet
- | Instance String
- | NodeGroupLockSet
- | NodeGroup String
- | NodeLockSet
- | Node String
- | NodeResLockSet
- | NodeRes String
- | NetworkLockSet
- | Network String
- | ConfigLock
lockName :: GanetiLocks -> String
lockFromName :: String -> Result GanetiLocks
data LockLevel
- = LevelCluster
- | LevelInstance
- | LevelNodeGroup
- | LevelNode
- | LevelNodeRes
- | LevelNetwork
- | LevelConfig
lockLevelName :: LockLevel -> String
lockLevelFromName :: String -> Result LockLevel
lockLevel :: GanetiLocks -> LockLevel
data ClientType
- = ClientOther String
- | ClientJob JobId
data ClientId = ClientId {
- ciIdentifier :: ClientType
- ciLockFile :: FilePath
- ciPid :: ProcessID
}
clientIdFromJSON :: JSValue -> Result ClientId
type GanetiLockWaiting = LockWaiting GanetiLocks ClientId Integer

Documentation

data GanetiLocks Source #

The type of Locks available in Ganeti. The order of this type is the lock oder.

Constructors

ClusterLockSet
BGL
InstanceLockSet
Instance String
NodeGroupLockSet
NodeGroup String
NodeLockSet
Node String
NodeResLockSet
NodeRes String
NetworkLockSet
Network String
ConfigLock	A lock used for a transitional period when WConfd keeps the state of the configuration, but all the operations are still performed on the Python side.

Instances

Instances details

Eq GanetiLocks #
Instance details Defined in Ganeti.Locking.Locks Methods (==) :: GanetiLocks -> GanetiLocks -> Bool (/=) :: GanetiLocks -> GanetiLocks -> Bool
Ord GanetiLocks #
Instance details Defined in Ganeti.Locking.Locks Methods compare :: GanetiLocks -> GanetiLocks -> Ordering (<) :: GanetiLocks -> GanetiLocks -> Bool (<=) :: GanetiLocks -> GanetiLocks -> Bool (>) :: GanetiLocks -> GanetiLocks -> Bool (>=) :: GanetiLocks -> GanetiLocks -> Bool max :: GanetiLocks -> GanetiLocks -> GanetiLocks min :: GanetiLocks -> GanetiLocks -> GanetiLocks
Show GanetiLocks #
Instance details Defined in Ganeti.Locking.Locks Methods showsPrec :: Int -> GanetiLocks -> ShowS show :: GanetiLocks -> String showList :: [GanetiLocks] -> ShowS
JSON GanetiLocks #
Instance details Defined in Ganeti.Locking.Locks Methods readJSON :: JSValue -> Result GanetiLocks showJSON :: GanetiLocks -> JSValue readJSONs :: JSValue -> Result [GanetiLocks] showJSONs :: [GanetiLocks] -> JSValue
Lock GanetiLocks #
Instance details Defined in Ganeti.Locking.Locks Methods lockImplications :: GanetiLocks -> [GanetiLocks] Source #
Arbitrary GanetiLocks
Instance details Defined in Test.Ganeti.Locking.Locks Methods arbitrary :: Gen GanetiLocks shrink :: GanetiLocks -> [GanetiLocks]

lockName :: GanetiLocks -> String Source #

Provide the String representation of a lock

lockFromName :: String -> Result GanetiLocks Source #

Obtain a lock from its name.

data LockLevel Source #

The levels, the locks belong to.

Constructors

LevelCluster
LevelInstance
LevelNodeGroup
LevelNode
LevelNodeRes
LevelNetwork
LevelConfig	A transitional level for internal configuration locks

Instances

Instances details

Enum LockLevel #
Instance details Defined in Ganeti.Locking.Locks Methods succ :: LockLevel -> LockLevel pred :: LockLevel -> LockLevel toEnum :: Int -> LockLevel fromEnum :: LockLevel -> Int enumFrom :: LockLevel -> [LockLevel] enumFromThen :: LockLevel -> LockLevel -> [LockLevel] enumFromTo :: LockLevel -> LockLevel -> [LockLevel] enumFromThenTo :: LockLevel -> LockLevel -> LockLevel -> [LockLevel]
Eq LockLevel #
Instance details Defined in Ganeti.Locking.Locks Methods (==) :: LockLevel -> LockLevel -> Bool (/=) :: LockLevel -> LockLevel -> Bool
Show LockLevel #
Instance details Defined in Ganeti.Locking.Locks Methods showsPrec :: Int -> LockLevel -> ShowS show :: LockLevel -> String showList :: [LockLevel] -> ShowS
JSON LockLevel #
Instance details Defined in Ganeti.Locking.Locks Methods readJSON :: JSValue -> Result LockLevel showJSON :: LockLevel -> JSValue readJSONs :: JSValue -> Result [LockLevel] showJSONs :: [LockLevel] -> JSValue
Arbitrary LockLevel
Instance details Defined in Test.Ganeti.Locking.Locks Methods arbitrary :: Gen LockLevel shrink :: LockLevel -> [LockLevel]

lockLevelName :: LockLevel -> String Source #

Provide the names of the lock levels.

lockLevelFromName :: String -> Result LockLevel Source #

Obtain a lock level from its name/

lockLevel :: GanetiLocks -> LockLevel Source #

For a lock, provide its level.

data ClientType Source #

Type of entities capable of owning locks. Usually, locks are owned by jobs. However, occassionally other tasks need locks (currently, e.g., to lock the configuration). These are identified by a unique name, reported to WConfD as a strig.

Constructors

ClientOther String
ClientJob JobId

Instances

Instances details

Eq ClientType #
Instance details Defined in Ganeti.Locking.Locks Methods (==) :: ClientType -> ClientType -> Bool (/=) :: ClientType -> ClientType -> Bool
Ord ClientType #
Instance details Defined in Ganeti.Locking.Locks Methods compare :: ClientType -> ClientType -> Ordering (<) :: ClientType -> ClientType -> Bool (<=) :: ClientType -> ClientType -> Bool (>) :: ClientType -> ClientType -> Bool (>=) :: ClientType -> ClientType -> Bool max :: ClientType -> ClientType -> ClientType min :: ClientType -> ClientType -> ClientType
Show ClientType #
Instance details Defined in Ganeti.Locking.Locks Methods showsPrec :: Int -> ClientType -> ShowS show :: ClientType -> String showList :: [ClientType] -> ShowS
JSON ClientType #
Instance details Defined in Ganeti.Locking.Locks Methods readJSON :: JSValue -> Result ClientType showJSON :: ClientType -> JSValue readJSONs :: JSValue -> Result [ClientType] showJSONs :: [ClientType] -> JSValue
Arbitrary ClientType
Instance details Defined in Test.Ganeti.Locking.Locks Methods arbitrary :: Gen ClientType shrink :: ClientType -> [ClientType]

data ClientId Source #

A client is identified as a job id, thread id, a path to its process identifier file, and its process id.

The JobId isn't enough to identify a client as the master daemon also handles client calls that aren't jobs, but which use the configuration. These taks are identified by a unique name, reported to WConfD as a string.

Constructors

ClientId
Fields ciIdentifier :: ClientType ciLockFile :: FilePath ciPid :: ProcessID

Instances

Instances details

Eq ClientId #
Instance details Defined in Ganeti.Locking.Locks Methods (==) :: ClientId -> ClientId -> Bool (/=) :: ClientId -> ClientId -> Bool
Ord ClientId #
Instance details Defined in Ganeti.Locking.Locks Methods compare :: ClientId -> ClientId -> Ordering (<) :: ClientId -> ClientId -> Bool (<=) :: ClientId -> ClientId -> Bool (>) :: ClientId -> ClientId -> Bool (>=) :: ClientId -> ClientId -> Bool max :: ClientId -> ClientId -> ClientId min :: ClientId -> ClientId -> ClientId
Show ClientId #
Instance details Defined in Ganeti.Locking.Locks Methods showsPrec :: Int -> ClientId -> ShowS show :: ClientId -> String showList :: [ClientId] -> ShowS
JSON ClientId #
Instance details Defined in Ganeti.Locking.Locks Methods readJSON :: JSValue -> Result ClientId showJSON :: ClientId -> JSValue readJSONs :: JSValue -> Result [ClientId] showJSONs :: [ClientId] -> JSValue
Arbitrary ClientId
Instance details Defined in Test.Ganeti.Locking.Locks Methods arbitrary :: Gen ClientId shrink :: ClientId -> [ClientId]

clientIdFromJSON :: JSValue -> Result ClientId Source #

Obtain the ClientID from its JSON representation.

type GanetiLockWaiting = LockWaiting GanetiLocks ClientId Integer Source #

The type of lock Allocations in Ganeti. In Ganeti, the owner of locks are jobs.

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