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root / src / Ganeti / WConfd @ 731152ce

Name Size
ConfigState.hs 1.3 kB
ConfigWriter.hs 6.1 kB
Core.hs 3.5 kB
DeathDetection.hs 3 kB
Language.hs 2.4 kB
Monad.hs 7.3 kB
Server.hs 3.5 kB
Ssconf.hs 3.9 kB

Latest revisions

# Date Author Comment
731152ce 03/07/2014 05:22 pm Petr Pudlak

Add a module for constructing Ssconf from the configuration

This migrates the functionality from Python
ConfigWriter._UnlockedGetSsconfValues to Haskell.

Signed-off-by: Petr Pudlak <>
Reviewed-by: Klaus Aehlig <>
41ea331e 03/07/2014 05:22 pm Petr Pudlak

Let WConfd distribute the configuration to MCs

.. and remove the distribution from lib/config.py

Signed-off-by: Petr Pudlak <>
Reviewed-by: Klaus Aehlig <>
94c7e022 03/07/2014 05:22 pm Petr Pudlak

Function that distributes the configuration to MCs

Also refactor helper functions in WConfd/ConfigWriter into smaller ones
and add helpers for RPC calls.

Signed-off-by: Petr Pudlak <>
Reviewed-by: Klaus Aehlig <>
e45eeb79 03/07/2014 05:22 pm Petr Pudlak

Use lenses for modifying DaemonState in WConfd

This removes the verbose code for record updating and leads to more
point-free code.

Signed-off-by: Petr Pudlak <>
Reviewed-by: Klaus Aehlig <>
0d1d2d22 03/07/2014 05:22 pm Petr Pudlak

Write the configuration only if it changed

.. to avoid expensive operation when they're not actually needed.
Comparing the two objects in memory is much less costly that
distributing the configuration.

Signed-off-by: Petr Pudlak <>
Reviewed-by: Klaus Aehlig <>
1e0d1a19 03/07/2014 05:22 pm Petr Pudlak

Add a helper to ConfigWriter for creating async. workers

In particular, stateful workers that can fail with an error, in which
case the error is logged and the state remains unchanged.

Signed-off-by: Petr Pudlak <>
Reviewed-by: Klaus Aehlig <>
f3010b75 03/07/2014 10:57 am Klaus Aehlig

Also clean up stale livelock files

Upon detection of a stale livelock, make WConfD also
try to clean it up. We can safely ignore any failures,
as the Ganeti resources are already freed, and the worst
thing that can happen is an empty file left over in the...
db0d2ee9 03/06/2014 05:35 pm Klaus Aehlig

In WConfD run a cleanup task

Add the cleanup task for locks of died owners to WConfD,
as a separate thread.

Signed-off-by: Klaus Aehlig <>
Reviewed-by: Petr Pudlak <>
b57c50de 03/06/2014 05:35 pm Klaus Aehlig

Provide a periodic lock cleanup task

Provide a task that periodically checks for all locks
owners whether they are still alive. If not, it cleans
up their locks.

Signed-off-by: Klaus Aehlig <>
Reviewed-by: Petr Pudlak <>
bacb44fe 03/06/2014 05:35 pm Klaus Aehlig

Add a function to detect death of a job

With jobs running in processes different from the lock management soon,
we need to detect if a job holding locks dies, in order to release the
resources.

Signed-off-by: Klaus Aehlig <>
Reviewed-by: Petr Pudlak <>

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