No configuration found for this host:tier1_no configuration found for this host:agent-优快云博客

本文介绍了Flume启动过程中默认代理名称的使用情况，并通过一个实例详细解释了如果不指定代理名称可能出现的问题及解决方法。此外，还展示了启动Flume时正确的日志输出，帮助读者更好地理解Flume的配置和启动过程。

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flume启动时，如果没有通过参数(--name 或者 - n)指定代理，那么默认使用tier1作为代理名称，启动成功后，不会报错，但是可能会提示如题警告。

flume.conf配置文件默认就是用tier1作为代理名称。如下所示。

这个实例是网上一个正好使用了默认tier1作为agent，但是启动时却使用了"agent"作为agent,有点多余。再联系本文，不难推测这里启动时应该指定-n tier1。

指定正确的agent之后，启动会出现如下所示的日志。

2018-02-22 15:37:03,557 INFO org.apache.flume.node.PollingPropertiesFileConfigurationProvider: Configuration provider starting
2018-02-22 15:37:03,582 INFO org.apache.flume.node.PollingPropertiesFileConfigurationProvider: Reloading configuration file:/opt/cm-5.12.0/run/cloudera-scm-agent/process/196-flume-AGENT/flume.conf
2018-02-22 15:37:03,587 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,587 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,587 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,587 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,587 INFO org.apache.flume.conf.FlumeConfiguration: Added sinks: hdfs-sink-1 Agent: agent1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,588 INFO org.apache.flume.conf.FlumeConfiguration: Processing:hdfs-sink-1
2018-02-22 15:37:03,603 INFO org.apache.flume.conf.FlumeConfiguration: Post-validation flume configuration contains configuration for agents: [agent1]
2018-02-22 15:37:03,603 INFO org.apache.flume.node.AbstractConfigurationProvider: Creating channels
2018-02-22 15:37:03,654 INFO org.apache.flume.channel.DefaultChannelFactory: Creating instance of channel file-channel-1 type file
2018-02-22 15:37:03,686 INFO org.apache.flume.node.AbstractConfigurationProvider: Created channel file-channel-1
2018-02-22 15:37:03,687 INFO org.apache.flume.source.DefaultSourceFactory: Creating instance of source kafka-source-1, type org.apache.flume.source.kafka.KafkaSource

如果是通过clouder-manager部署的flume,可以直接在实例配置界面做配置。