ClickHouse/tests/integration/test_system_logs/configs/config.xml

<clickhouse>
    <logger>
        <level>trace</level>
        <log>/var/log/clickhouse-server/log.log</log>
        <errorlog>/var/log/clickhouse-server/log.err.log</errorlog>
        <size>1000M</size>
        <count>10</count>
    </logger>

    <http_port>8123</http_port>
    <tcp_port>9000</tcp_port>
    <listen_host>127.0.0.1</listen_host>
    <interserver_http_port>9009</interserver_http_port>
    <interserver_http_host>127.0.0.1</interserver_http_host>
</clickhouse>