ganeti-htools Source code Contents Index

Ganeti.HTools.Program.Hbal

Description

Cluster rebalancer.

Synopsis

options :: [OptType] iterateDepth :: Bool -> Table -> Int -> Bool -> Bool -> Int -> Int -> [MoveJob] -> Score -> Score -> Score -> Bool -> IO (Table, [MoveJob]) printStats :: List -> List -> IO () saveBalanceCommands :: Options -> String -> IO () waitForJobs :: Client -> [String] -> IO (Result [JobStatus]) checkJobsStatus :: [JobStatus] -> Bool execWrapper :: String -> List -> List -> IORef Int -> [JobSet] -> IO Bool execJobSet :: String -> List -> List -> IORef Int -> [JobSet] -> IO Bool maybeExecJobs :: Options -> [a] -> List -> List -> [JobSet] -> IO Bool hangleSigInt :: IORef Int -> IO () hangleSigTerm :: IORef Int -> IO () runJobSet :: String -> List -> List -> [JobSet] -> IO Bool selectGroup :: Options -> List -> List -> List -> IO (String, (List, List)) checkCluster :: Int -> List -> List -> IO () checkGroup :: Int -> String -> List -> List -> IO () checkNeedRebalance :: Options -> Score -> IO () main :: Options -> [String] -> IO ()

Documentation

options :: [OptType] Source

Options list and functions.

iterateDepth Source

:: Bool Whether to print moves -> Table The starting table -> Int Remaining length -> Bool Allow disk moves -> Bool Allow instance moves -> Int Max node name len -> Int Max instance name len -> [MoveJob] Current command list -> Score Score at which to stop -> Score Min gain limit -> Score Min score gain -> Bool Enable evacuation mode -> IO (Table, [MoveJob]) The resulting table and commands Start computing the solution at the given depth and recurse until we find a valid solution or we exceed the maximum depth.

printStats :: List -> List -> IO () Source

Displays the cluster stats.

saveBalanceCommands :: Options -> String -> IO () Source

Saves the rebalance commands to a text file.

waitForJobs :: Client -> [String] -> IO (Result [JobStatus]) Source

Polls a set of jobs at a fixed interval until all are finished one way or another.

checkJobsStatus :: [JobStatus] -> Bool Source

Check that a set of job statuses is all success.

execWrapper :: String -> List -> List -> IORef Int -> [JobSet] -> IO Bool Source

Wrapper over execJobSet checking for early termination.

execJobSet :: String -> List -> List -> IORef Int -> [JobSet] -> IO Bool Source

Execute an entire jobset.

maybeExecJobs :: Options -> [a] -> List -> List -> [JobSet] -> IO Bool Source

Executes the jobs, if possible and desired.

hangleSigInt :: IORef Int -> IO () Source

Signal handler for graceful termination.

hangleSigTerm :: IORef Int -> IO () Source

Signal handler for immediate termination.

runJobSet :: String -> List -> List -> [JobSet] -> IO Bool Source

Runs a job set with handling of signals.

selectGroup :: Options -> List -> List -> List -> IO (String, (List, List)) Source

Select the target node group.

checkCluster :: Int -> List -> List -> IO () Source

Do a few checks on the cluster data.

checkGroup :: Int -> String -> List -> List -> IO () Source

Do a few checks on the selected group data.

checkNeedRebalance :: Options -> Score -> IO () Source

Check that we actually need to rebalance.

main :: Options -> [String] -> IO () Source

Main function.

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