第一个例子，监听端口，输出到控制台。

新建一个文件 flume-config01.conf,输入下面的内容。该配置定义了一个 agent 叫做 a1，soruce 监听 4444 端口，channel 使用内存缓存，sink 用于输出日志到控制台。

需要注意的是，sinks.k1.channel 是单数

# example.conf: A single-node Flume configuration
# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1
# Describe/configure the source
a1.sources.r1.type = netcat
a1.sources.r1.bind = localhost
a1.sources.r1.port = 44444
# Describe the sink
a1.sinks.k1.type = logger
# Use a channel which buffers events in memory
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

启动命令

flume-ng agent --conf conf --conf-file conf/flume-config01.conf -name a1 -Dflume.root.logger=INFO,console

打开另一个窗口，输入

telnet localhost 44444

如图：