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Apache HDFS Connection
======================

The Apache HDFS connection type enables connection to Apache HDFS.

Default Connection IDs
----------------------

HDFS Hook uses parameter ``hdfs_conn_id`` for Connection IDs and the value of the parameter
as ``hdfs_default`` by default.
Web HDFS Hook uses parameter ``webhdfs_conn_id`` for Connection IDs and the value of the
parameter as ``webhdfs_default`` by default.

Configuring the Connection
--------------------------
Host
    The host to connect to, it can be ``local``, ``yarn`` or an URL.

Port
    Specify the port in case of host be an URL.

Extra (optional, connection parameters)
    Specify the extra parameters (as json dictionary) that can be used in HDFS connection. The following
    parameters out of the standard python parameters are supported:

    * ``proxy_user`` - Effective user for HDFS operations.
    * ``autoconfig`` - Default value is bool: False. Use snakebite's automatically configured client. This HDFSHook implementation requires snakebite.

    The following extra parameters can be used to configure SSL for Web HDFS Hook:

    * ``use_ssl`` - If SSL should be used. By default is set to `false`.
    * ``verify`` - How to verify SSL. For more information refer to https://docs.python-requests.org/en/master/user/advanced/#ssl-cert-verification.