ClickHouse/programs/server/config.d/more_clusters.xml

<clickhouse>
    <remote_servers>

        <![CDATA[
            You can run additional servers simply as
             ./clickhouse-server -- --path=9001 --tcp_port=9001
        ]]>

        <single_remote_shard_at_port_9001>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9001</port>
                </replica>
            </shard>
        </single_remote_shard_at_port_9001>

        <two_remote_shards_at_port_9001_9002>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9001</port>
                </replica>
            </shard>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9002</port>
                </replica>
            </shard>
        </two_remote_shards_at_port_9001_9002>

        <two_shards_one_local_one_remote_at_port_9001>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9000</port>
                </replica>
            </shard>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9001</port>
                </replica>
            </shard>
        </two_shards_one_local_one_remote_at_port_9001>

    </remote_servers>
</clickhouse>