ScyllaDB Cloud Serverless

ScyllaDB Cloud Serverless¶

With ScyllaDB Cloud, you can deploy serverless databases. The Python driver allows you to connect to a serverless database by utilizing the connection bundle you can download via the Connect>Python tab in the Cloud application. The connection bundle is a YAML file with connection and credential information for your cluster.

Connecting to a ScyllaDB Cloud serverless database is very similar to a standard connection to a ScyllaDB database.

Here’s a short program that connects to a ScyllaDB Cloud serverless database and prints metadata about the cluster:

from cassandra.cluster import Cluster, ExecutionProfile, EXEC_PROFILE_DEFAULT
from cassandra.policies import DCAwareRoundRobinPolicy, TokenAwarePolicy

PATH_TO_BUNDLE_YAML = '/file/downloaded/from/cloud/connect-bundle.yaml'


def get_cluster():
    profile = ExecutionProfile(
        load_balancing_policy=TokenAwarePolicy(
            DCAwareRoundRobinPolicy(local_dc='us-east-1')
        )
    )

    return Cluster(
        execution_profiles={EXEC_PROFILE_DEFAULT: profile},
        scylla_cloud=PATH_TO_BUNDLE_YAML,
    )


print('Connecting to cluster')
cluster = get_cluster()
session = cluster.connect()

print('Connected to cluster', cluster.metadata.cluster_name)

print('Getting metadata')
for host in cluster.metadata.all_hosts():
    print('Datacenter: {}; Host: {}; Rack: {}'.format(
        host.datacenter, host.address, host.rack)
    )

cluster.shutdown()

By providing the scylla_cloud parameter to the Cluster constructor, the driver can set up the connection based on the endpoint and credential information stored in your downloaded ScyllaDB Cloud Serverless connection bundle.

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ScyllaDB Python Driver is available under the Apache v2 License. ScyllaDB Python Driver is a fork of DataStax Python Driver. See Copyright here.