ClickHouse/dbms/tests/integration/helpers/zookeeper_config.xml

<yandex>
    <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>3000</session_timeout_ms>
	</zookeeper>
</yandex>