Flume NG 是一个分布式、可靠且可用的服务,用于高效地收集、聚合和移动大量日志数据。它具有容错性和保证数据传输的特性,非常适合于日志聚合。Flume NG 可以从多种数据源(如 MySQL)抓取数据,并将其传输到各种数据接收方(如 HDFS、HBase 或 Kafka 等)。
假设我们要从 MySQL 数据库中抓取数据,并将其传输到 HDFS。以下是一个简单的 Flume NG 配置示例:
# 定义 Agent 名称
agent1.sources = mysqlSource
agent1.sinks = hdfsSink
agent1.channels = memoryChannel
# 配置 Source
agent1.sources.mysqlSource.type = org.apache.flume.source.jdbc.JdbcSource
agent1.sources.mysqlSource.connectionUrl = jdbc:mysql://localhost:3306/mydatabase
agent1.sources.mysqlSource.username = myuser
agent1.sources.mysqlSource.password = mypassword
agent1.sources.mysqlSource.table = mytable
agent1.sources.mysqlSource.columns = id,name,value
agent1.sources.mysqlSource.pollingInterval = 60000
# 配置 Channel
agent1.channels.memoryChannel.type = memory
agent1.channels.memoryChannel.capacity = 1000
agent1.channels.memoryChannel.transactionCapacity = 100
# 配置 Sink
agent1.sinks.hdfsSink.type = hdfs
agent1.sinks.hdfsSink.hdfs.path = hdfs://localhost:9000/user/flume/data
agent1.sinks.hdfsSink.hdfs.filePrefix = events-
agent1.sinks.hdfsSink.hdfs.fileType = DataStream
agent1.sinks.hdfsSink.hdfs.writeFormat = Text
agent1.sinks.hdfsSink.hdfs.rollInterval = 0
agent1.sinks.hdfsSink.hdfs.rollSize = 1048576
agent1.sinks.hdfsSink.hdfs.rollCount = 0
# 绑定 Source、Channel 和 Sink
agent1.sources.mysqlSource.channels = memoryChannel
agent1.sinks.hdfsSink.channel = memoryChannel
pollingInterval
和 Channel 的容量以优化性能。请注意,上述配置示例和参考链接仅供参考,实际使用时可能需要根据具体需求进行调整。
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