ClickHouse/tests/integration/test_cluster_copier/configs_three_nodes/config-copier.xml

<clickhouse>
    <logger>
        <level>information</level>
        <log>/var/log/clickhouse-server/copier/log.log</log>
        <errorlog>/var/log/clickhouse-server/copier/log.err.log</errorlog>
        <size>1000M</size>
        <count>10</count>
        <stderr>/var/log/clickhouse-server/copier/stderr.log</stderr>
        <stdout>/var/log/clickhouse-server/copier/stdout.log</stdout>
    </logger>

    <zookeeper>
        <node index="1">
            <host>zoo1</host>
            <port>2181</port>
        </node>
        <node index="2">
            <host>zoo2</host>
            <port>2181</port>
        </node>
            <node index="3">
            <host>zoo3</host>
            <port>2181</port>
        </node>
        <session_timeout_ms>2000</session_timeout_ms>
    </zookeeper>
</clickhouse>