配置Kafka Connect分布式连接器日志(connectDistributed.out)

Question

目前正在收集两种类型的Kafka Connect日志。

• connect-rest.log.2018-07-01-21、connect-rest.log.2018-07-01-22
• connectDistributed.out

问题是我不知道如何在Kafka Connect中配置connectDistributed.out文件。以下是文件的示例输出：

[2018-07-11 08:42:40,798] INFO WorkerSinkTask{id=elasticsearch-sink- 
connector-0} Committing offsets asynchronously using sequence number 
216: {test-1=OffsetAndMetadata{offset=476028, metadata=‘’}, 
test-0=OffsetAndMetadata{offset=478923, metadata=‘’}, 
test-2=OffsetAndMetadata{offset=477944, metadata=‘’}} 
(org.apache.kafka.connect.runtime.WorkerSinkTask:325)
[2018-07-11 08:43:40,798] INFO WorkerSinkTask{id=elasticsearch-sink-connector0} 
Committing offsets asynchronously using sequence number 217: 
{test-1=OffsetAndMetadata{offset=476404, metadata=‘’}, 
test-0=OffsetAndMetadata{offset=479241, metadata=‘’}, 
test-2=OffsetAndMetadata{offset=478316, metadata=‘’}} 
(org.apache.kafka.connect.runtime.WorkerSinkTask:325)

由于没有配置任何日志记录选项，随着时间的推移，文件大小越来越大。今天，它达到了20GB，我不得不手动清空文件。所以我的问题是如何配置这个connectDistributed.out？我正在为其他组件配置日志选项，例如kafkabroker日志。

---

以下是我正在使用的confluent-4.1.0/etc/kafka下的一些与Kafka Connect相关的日志配置。

log4j.properties

log4j.appender.requestAppender.File=${kafka.logs.dir}/kafka-request.log
log4j.appender.requestAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.requestAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.cleanerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.cleanerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.cleanerAppender.File=${kafka.logs.dir}/log-cleaner.log
log4j.appender.cleanerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.cleanerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.controllerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.controllerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.controllerAppender.File=${kafka.logs.dir}/controller.log
log4j.appender.controllerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.controllerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.authorizerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.authorizerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.authorizerAppender.File=${kafka.logs.dir}/kafka-authorizer.log
log4j.appender.authorizerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.authorizerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
# Change the two lines below to adjust ZK client logging
log4j.logger.org.I0Itec.zkclient.ZkClient=INFO
log4j.logger.org.apache.zookeeper=INFO
# Change the two lines below to adjust the general broker logging level (output to server.log and stdout)
log4j.logger.kafka=INFO
log4j.logger.org.apache.kafka=INFO
# Change to DEBUG or TRACE to enable request logging
log4j.logger.kafka.request.logger=WARN, requestAppender
log4j.additivity.kafka.request.logger=false
# Uncomment the lines below and change log4j.logger.kafka.network.RequestChannel$ to TRACE for additional output
# related to the handling of requests
#log4j.logger.kafka.network.Processor=TRACE, requestAppender
#log4j.logger.kafka.server.KafkaApis=TRACE, requestAppender
#log4j.additivity.kafka.server.KafkaApis=false
log4j.logger.kafka.network.RequestChannel$=WARN, requestAppender
log4j.additivity.kafka.network.RequestChannel$=false
log4j.logger.kafka.controller=TRACE, controllerAppender
log4j.additivity.kafka.controller=false
log4j.logger.kafka.log.LogCleaner=INFO, cleanerAppender
log4j.additivity.kafka.log.LogCleaner=false
log4j.logger.state.change.logger=TRACE, stateChangeAppender
log4j.additivity.state.change.logger=false
# Access denials are logged at INFO level, change to DEBUG to also log allowed accesses
log4j.logger.kafka.authorizer.logger=INFO, authorizerAppender
log4j.additivity.kafka.authorizer.logger=false

connect-log4j.properties

log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c:%L)%n
log4j.logger.org.apache.zookeeper=ERROR
log4j.logger.org.I0Itec.zkclient=ERROR
log4j.logger.org.reflections=ERROR

log4j.appender.kafkaConnectRestAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.kafkaConnectRestAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.kafkaConnectRestAppender.File=/home/ec2-user/logs/connect-rest.log
log4j.appender.kafkaConnectRestAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.kafkaConnectRestAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.logger.org.apache.kafka.connect.runtime.rest=INFO, kafkaConnectRestAppender
log4j.additivity.org.apache.kafka.connect.runtime.rest=false

Answer 1

connectDistributed.out文件仅在使用守护进程模式时存在，例如

connect-distributed -daemon connect-distributed.properties

原因：从kafka-run-class脚本，CONSOLE_OUTPUT_FILE设置为connectDistributed.out

# Launch mode
if [ "x$DAEMON_MODE" = "xtrue" ]; then
nohup $JAVA $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$@" > "$CONSOLE_OUTPUT_FILE" 2>&1 < /dev/null &
else... 

---

选项1：加载自定义log4j属性文件

在开始连接之前，您可以更新KAFKA_LOG4J_OPTS环境变量，使其指向您想要的任何log4j属性文件(参见下面的示例(

$ export KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file://path/to/connect-log4j-new.properties"
$ connect-distributed connect-distributed.properties

注意：此处不使用-daemon

如果您在log4j属性中不再有ConsoleAppender，这将几乎不输出任何内容，并且只是挂起，所以最好是nohup。

---

默认的log4j配置名为connect-log4j.properties，在Confluent Platform中，它位于etc/kafka/文件夹中。这是默认情况下的样子

log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender

为了设置最大日志文件大小，您需要更改根记录器以转到FileAppender而不是ConsoleAppender，但我更喜欢使用DailyRollingFileAppender。

以下是的示例

log4j.rootLogger=INFO, stdout, FILE
log4j.appender.FILE=org.apache.log4j.DailyRollingFileAppender
log4j.appender.FILE.DatePattern='.'yyyy-MM-dd
log4j.appender.FILE.File=/var/log/kafka-connect/connect.log
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c:%L)%n
log4j.logger.org.apache.zookeeper=ERROR
log4j.logger.org.I0Itec.zkclient=ERROR
log4j.logger.org.reflections=ERROR

Answer 2

我没有足够的声誉发表评论(但我可以回答…(，所以我只想指出，作为对板球回答的回应，我不会使用DailyRollingFileAppender。在文档中，它表示由于同步和数据丢失问题，它没有得到修改。相反，我会将RollingFileAppender与TimeBasedRollingPolicy结合使用。在Kafka Connect中DailyRollingFileAppender的一些奇怪行为之后，我注意到了这一点。您需要在类路径中包含log4j"extrass"jar才能实现这一点。