.. _tutorial-autoaccept-grains:

==============================
Autoaccept minions from Grains
==============================

.. versionadded:: 2018.3.0

To automatically accept minions based on certain characteristics, e.g. the ``uuid``
you can specify certain grain values on the salt master. Minions with matching grains
will have their keys automatically accepted.

1. Configure the autosign_grains_dir in the master config file:

.. code-block:: yaml

    autosign_grains_dir: /etc/salt/autosign_grains


2. Configure the grain values to be accepted

Place a file named like the grain in the autosign_grains_dir and write the values that
should be accepted automatically inside that file. For example to automatically
accept minions based on their ``uuid`` create a file named ``/etc/salt/autosign_grains/uuid``:

.. code-block:: none

    8f7d68e2-30c5-40c6-b84a-df7e978a03ee
    1d3c5473-1fbc-479e-b0c7-877705a0730f

The master is now setup to accept minions with either of the two specified uuids.
Multiple values must always be written into separate lines.
Lines starting with a ``#`` are ignored.


3. Configure the minion to send the specific grains to the master in the minion config file:

.. code-block:: yaml

    autosign_grains:
      - uuid

Now you should be able to start salt-minion and run ``salt-call
state.apply`` or any other salt commands that require master authentication.