红帽全球峰会3.8. 日志记录
ZooKeeper 使用 log4j 作为其日志基础架构。日志记录配置默认从 log4j.properties 配置文件读取，该文件应放在 /opt/kafka/config/ 目录中或 classpath 中。可以使用 Java 属性 log4j.configuration 更改配置文件的位置和名称，该配置可使用 KAFKA_LOG4J_OPTS 环境变量传递给 ZooKeeper：
su - kafka export KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file:/my/path/to/log4j.properties"; /opt/kafka/bin/zookeeper-server-start.sh -daemon /opt/kafka/config/zookeeper.properties
su - kafka
export KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file:/my/path/to/log4j.properties"; /opt/kafka/bin/zookeeper-server-start.sh -daemon /opt/kafka/config/zookeeper.properties有关 Log4j 配置的更多信息，请参阅 Log4j 文档。
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