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Snappy
------
**Summary:** snappy modules allows configuration of snappy.

**Deprecated**: Use :ref:`snap` module instead. This module will not exist
in cloud-init 18.3.

The below example config config would install ``etcd``, and then install
``pkg2.smoser`` with a ``<config-file>`` argument where ``config-file`` has
``config-blob`` inside it. If ``pkgname`` is installed already, then
``snappy config pkgname <file>``
will be called where ``file`` has ``pkgname-config-blob`` as its content.

Entries in ``config`` can be namespaced or non-namespaced for a package.
In either case, the config provided to snappy command is non-namespaced.
The package name is provided as it appears.

If ``packages_dir`` has files in it that end in ``.snap``, then they are
installed.  Given 3 files:

  - <packages_dir>/foo.snap
  - <packages_dir>/foo.config
  - <packages_dir>/bar.snap

cloud-init will invoke:

  - snappy install <packages_dir>/foo.snap <packages_dir>/foo.config
  - snappy install <packages_dir>/bar.snap

.. note::
    that if provided a ``config`` entry for ``ubuntu-core``, then
    cloud-init will invoke: snappy config ubuntu-core <config>
    Allowing you to configure ubuntu-core in this way.

The ``ssh_enabled`` key controls the system's ssh service. The default value
is ``auto``. Options are:

  - **True:** enable ssh service
  - **False:** disable ssh service
  - **auto:** enable ssh service if either ssh keys have been provided
    or user has requested password authentication (ssh_pwauth).

**Internal name:** ``cc_snappy``

**Module frequency:** per instance

**Supported distros:** ubuntu

**Config keys**::

    #cloud-config
    snappy:
        system_snappy: auto
        ssh_enabled: auto
        packages: [etcd, pkg2.smoser]
        config:
            pkgname:
                key2: value2
            pkg2:
                key1: value1
        packages_dir: '/writable/user-data/cloud-init/snaps'
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