Current File : //usr/lib/python2.7/site-packages/salt/modules/zk_concurrency.pyo
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Concurrency controls in zookeeper
=========================================================================
:depends: kazoo
:configuration: See :py:mod:`salt.modules.zookeeper` for setup instructions.
This module allows you to acquire and release a slot. This is primarily useful
for ensureing that no more than N hosts take a specific action at once. This can
also be used to coordinate between masters.
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Return an un-ordered list of lock holders
path
The path in zookeeper where the lock is
zk_hosts
zookeeper connect string
identifier
Name to identify this minion, if unspecified defaults to hostname
max_concurrency
Maximum number of lock holders
timeout
timeout to wait for the lock. A None timeout will block forever
ephemeral_lease
Whether the locks in zookeper should be ephemeral
Example:
.. code-block: bash
salt minion zk_concurrency.lock_holders /lock/path host1:1234,host2:1234
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Get lock (with optional timeout)
path
The path in zookeeper where the lock is
zk_hosts
zookeeper connect string
identifier
Name to identify this minion, if unspecified defaults to the hostname
max_concurrency
Maximum number of lock holders
timeout
timeout to wait for the lock. A None timeout will block forever
ephemeral_lease
Whether the locks in zookeper should be ephemeral
force
Forcibly acquire the lock regardless of available slots
Example:
.. code-block: bash
salt minion zk_concurrency.lock /lock/path host1:1234,host2:1234
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Remove lease from semaphore
path
The path in zookeeper where the lock is
zk_hosts
zookeeper connect string
identifier
Name to identify this minion, if unspecified defaults to hostname
max_concurrency
Maximum number of lock holders
timeout
timeout to wait for the lock. A None timeout will block forever
ephemeral_lease
Whether the locks in zookeper should be ephemeral
Example:
.. code-block: bash
salt minion zk_concurrency.unlock /lock/path host1:1234,host2:1234
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Get the List of identifiers in a particular party, optionally waiting for the
specified minimum number of nodes (min_nodes) to appear
path
The path in zookeeper where the lock is
zk_hosts
zookeeper connect string
min_nodes
The minimum number of nodes expected to be present in the party
blocking
The boolean indicating if we need to block until min_nodes are available
Example:
.. code-block: bash
salt minion zk_concurrency.party_members /lock/path host1:1234,host2:1234
salt minion zk_concurrency.party_members /lock/path host1:1234,host2:1234 min_nodes=3 blocking=True
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