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Manage etcd Keys
================
.. versionadded:: 2015.8.0
:depends: - python-etcd
This state module supports setting and removing keys from etcd.
Configuration
-------------
To work with an etcd server you must configure an etcd profile. The etcd config
can be set in either the Salt Minion configuration file or in pillar:
.. code-block:: yaml
my_etd_config:
etcd.host: 127.0.0.1
etcd.port: 4001
It is technically possible to configure etcd without using a profile, but this
is not considered to be a best practice, especially when multiple etcd servers
or clusters are available.
.. code-block:: yaml
etcd.host: 127.0.0.1
etcd.port: 4001
.. note::
The etcd configuration can also be set in the Salt Master config file,
but in order to use any etcd configurations defined in the Salt Master
config, the :conf_master:`pillar_opts` must be set to ``True``.
Be aware that setting ``pillar_opts`` to ``True`` has security implications
as this makes all master configuration settings available in all minion's
pillars.
Etcd profile configuration can be overridden using following arguments: ``host``,
``port``, ``username``, ``password``, ``ca``, ``client_key`` and ``client_cert``.
.. code-block:: yaml
my-value:
etcd.set:
- name: /path/to/key
- value: value
- host: 127.0.0.1
- port: 2379
- username: user
- password: pass
Available Functions
-------------------
- ``set``
This will set a value to a key in etcd. Changes will be returned if the key
has been created or the value of the key has been updated. This
means you can watch these states for changes.
.. code-block:: yaml
/foo/bar/baz:
etcd.set:
- value: foo
- profile: my_etcd_config
- ``wait_set``
Performs the same functionality as ``set`` but only if a watch requisite is ``True``.
.. code-block:: yaml
/some/file.txt:
file.managed:
- source: salt://file.txt
/foo/bar/baz:
etcd.wait_set:
- value: foo
- profile: my_etcd_config
- watch:
- file: /some/file.txt
- ``rm``
This will delete a key from etcd. If the key exists then changes will be
returned and thus you can watch for changes on the state, if the key does
not exist then no changes will occur.
.. code-block:: yaml
/foo/bar/baz:
etcd.rm:
- profile: my_etcd_config
- ``wait_rm``
Performs the same functionality as ``rm`` but only if a watch requisite is ``True``.
.. code-block:: yaml
/some/file.txt:
file.managed:
- source: salt://file.txt
/foo/bar/baz:
etcd.wait_rm:
- profile: my_etcd_config
- watch:
- file: /some/file.txt
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Set a key in etcd
name
The etcd key name, for example: ``/foo/bar/baz``.
value
The value the key should contain.
profile
Optional, defaults to ``None``. Sets the etcd profile to use which has
been defined in the Salt Master config.
.. code-block:: yaml
my_etd_config:
etcd.host: 127.0.0.1
etcd.port: 4001
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Set a key in etcd only if the watch statement calls it. This function is
also aliased as ``wait_set``.
name
The etcd key name, for example: ``/foo/bar/baz``.
value
The value the key should contain.
profile
The etcd profile to use that has been configured on the Salt Master,
this is optional and defaults to ``None``.
.. code-block:: yaml
my_etd_config:
etcd.host: 127.0.0.1
etcd.port: 4001
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Create a directory in etcd.
name
The etcd directory name, for example: ``/foo/bar/baz``.
profile
Optional, defaults to ``None``. Sets the etcd profile to use which has
been defined in the Salt Master config.
.. code-block:: yaml
my_etd_config:
etcd.host: 127.0.0.1
etcd.port: 4001
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Deletes a key from etcd
name
The etcd key name to remove, for example ``/foo/bar/baz``.
recurse
Optional, defaults to ``False``. If ``True`` performs a recursive delete.
profile
Optional, defaults to ``None``. Sets the etcd profile to use which has
been defined in the Salt Master config.
.. code-block:: yaml
my_etd_config:
etcd.host: 127.0.0.1
etcd.port: 4001
u nameu resultu changesu etcd.getR u Key does not existu commentu etcd.rmR u Key removedu Deletedu Unable to remove key( R R ( R
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Deletes a key from etcd only if the watch statement calls it.
This function is also aliased as ``wait_rm``.
name
The etcd key name to remove, for example ``/foo/bar/baz``.
recurse
Optional, defaults to ``False``. If ``True`` performs a recursive
delete, see: https://python-etcd.readthedocs.io/en/latest/#delete-a-key.
profile
Optional, defaults to ``None``. Sets the etcd profile to use which has
been defined in the Salt Master config.
.. code-block:: yaml
my_etd_config:
etcd.host: 127.0.0.1
etcd.port: 4001
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The etcd watcher, called to invoke the watch command.
When called, execute a etcd function based on a watch call requisite.
.. note::
This state exists to support special handling of the ``watch``
:ref:`requisite <requisites>`. It should not be called directly.
Parameters for this function should be set by the state being triggered.
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