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Apache Cassandra Connection
The Apache Cassandra connection type enables connection to `Apache Cassandra <>`__.
Default Connection IDs
Cassandra hook and Cassandra operators use ``cassandra_default`` by default.
Configuring the Connection
Host (required)
The host to connect to. It is possible to specify multiple hosts as a comma-separated list.
Schema (required)
The schema (keyspace) name to be used in the database.
Login (required)
The user name to connect.
Password (required)
The password to connect.
Port (required)
The port to connect.
Extra (optional)
The extra parameters (as json dictionary) that can be used in cassandra
connection. The following parameters out of the standard python parameters
are supported:
* ``load_balancing_policy`` - This parameter specifies the load balancing policy to be used. There are four available policies:
``RoundRobinPolicy``, ``DCAwareRoundRobinPolicy``, ``WhiteListRoundRobinPolicy`` and ``TokenAwarePolicy``. ``RoundRobinPolicy`` is the default load balancing policy.
* ``load_balancing_policy_args`` - This parameter specifies the arguments for the load balancing policy being used.
* ``cql_version`` - This parameter specifies the CQL version of cassandra.
* ``protocol_version`` - This parameter specifies the maximum version of the native protocol to use.
* ``ssl_options`` - This parameter specifies the details related to SSL, if it's enabled in Cassandra.
Examples for the **Extra** field
1. Specifying ``ssl_options``
If SSL is enabled in Cassandra, pass in a dict in the extra field as kwargs for ``ssl.wrap_socket()``. For example:
.. code-block:: json
"ssl_options": {
"ca_certs": "PATH/TO/CA_CERTS"
2. Specifying ``load_balancing_policy`` and ``load_balancing_policy_args``
Default load balancing policy is ``RoundRobinPolicy``. Following are a few samples to specify a different LB policy:
.. code-block:: json
"load_balancing_policy": "DCAwareRoundRobinPolicy",
"load_balancing_policy_args": {
"local_dc": "LOCAL_DC_NAME",
"used_hosts_per_remote_dc": "SOME_INT_VALUE"
.. code-block:: json
"load_balancing_policy": "WhiteListRoundRobinPolicy",
"load_balancing_policy_args": {
"hosts": ["HOST1", "HOST2", "HOST3"]
.. code-block:: json
"load_balancing_policy": "TokenAwarePolicy",
"load_balancing_policy_args": {
"child_load_balancing_policy": "CHILD_POLICY_NAME",
"child_load_balancing_policy_args": {}
.. seealso::