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

<yandex>
    <remote_servers>
        <test_cluster>
            <shard>
                <replica>
                    <host>remote</host>
                    <port>9000</port>
                </replica>
            </shard>
        </test_cluster>
        <test_local_cluster>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9000</port>
                </replica>
            </shard>
        </test_local_cluster>
        <shard_with_local_replica>
            <shard>
                <replica>
                    <host>node1</host>
                    <port>9000</port>
                </replica>
                <replica>
                    <host>node2</host>
                    <port>9000</port>
                </replica>
            </shard>
        </shard_with_local_replica>
	<shard_with_low_cardinality>
            <shard>
                <replica>
                    <host>shard1</host>
                    <port>9000</port>
                </replica>
	    </shard>
	    <shard>
                <replica>
                    <host>shard2</host>
                    <port>9000</port>
                </replica>
            </shard>
        </shard_with_low_cardinality>
    </remote_servers>
</yandex>