# Autoaccept minions from Grains

New in version 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:

    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`:

    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:

    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.