ClickHouse/tests/integration/test_insert_into_distributed_sync_async/configs/remote_servers.xml

<yandex>
    <remote_servers>

        <test_cluster>
            <shard>
                <replica>
                    <host>node1</host>
                    <port>9000</port>
                </replica>
                <replica>
                    <host>node2</host>
                    <port>9000</port>
                </replica>
            </shard>
        </test_cluster>

        <local_shard_with_internal_replication>
            <shard>
                <internal_replication>true</internal_replication>
                <replica>
                    <host>127.0.0.1</host>
                    <port>9000</port>
                </replica>
            </shard>
        </local_shard_with_internal_replication>

    </remote_servers>
</yandex>