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  5. Using Flume
  6. Example: Using Flume to Collect Logs and Import Them to OBS

Example: Using Flume to Collect Logs and Import Them to OBS


This section describes how to use Flume to import log information to OBS.


  • A streaming cluster has been created.
  • The Flume client has been installed on the node where logs are generated. For details, see Installing the Flume Client.
  • The streaming cluster can properly communicate with the node where logs are generated.
  • The node where logs are generated can parse the domain name of OBS.


  1. Create the core-site.xml file and save it to the conf directory of the Flume client.

    An example of parameter file content is as follows:

    <?xml version="1.0" encoding="UTF-8"?>

    The value of fs.s3a.endpoint is an OBS access address. The address must be in the same region as MRS. The parameter value can be either a domain name or an IP address. On MRS Manager, you can choose Service > Flume > Service Configuration, set Type to All, and view the value of s3service.s3-endpoint in S3service.

  2. Encrypt SK using the encryption tool of the Flume client. For details, see Using the Encryption Tool of the Flume Client.
  3. Run the following command to modify the properties.properties configuration file of the Flume client:

    vi conf/fusioninsight-flume-1.6.0/conf/properties.properties

    Add the following information to the file:

    client.sources = linux
    client.channels = flume
    client.sinks = obs
    client.sources.linux.type = spooldir
    client.sources.linux.spoolDir = /tmp/nemon
    client.sources.linux.montime = 
    client.sources.linux.fileSuffix = .COMPLETED
    client.sources.linux.deletePolicy = never
    client.sources.linux.trackerDir = .flumespool
    client.sources.linux.ignorePattern = ^$
    client.sources.linux.batchSize = 1000
    client.sources.linux.inputCharset = UTF-8
    client.sources.linux.selector.type = replicating
    client.sources.linux.fileHeader = false
    client.sources.linux.fileHeaderKey = file
    client.sources.linux.basenameHeader = true
    client.sources.linux.basenameHeaderKey = basename
    client.sources.linux.deserializer = LINE
    client.sources.linux.deserializer.maxBatchLine = 1
    client.sources.linux.deserializer.maxLineLength = 2048
    client.sources.linux.channels = flume
    client.channels.flume.type = memory
    client.channels.flume.capacity = 10000
    client.channels.flume.transactionCapacity = 1000
    client.channels.flume.channelfullcount = 10
    client.channels.flume.keep-alive = 3
    client.channels.flume.byteCapacity = 
    client.channels.flume.byteCapacityBufferPercentage = 20
    client.sinks.obs.type = hdfs
    client.sinks.obs.hdfs.path = s3a://AK:SK@obs-nemon-sink/obs-sink
    client.sinks.obs.montime = 
    client.sinks.obs.hdfs.filePrefix = obs_%{basename}
    client.sinks.obs.hdfs.fileSuffix = 
    client.sinks.obs.hdfs.inUsePrefix = 
    client.sinks.obs.hdfs.inUseSuffix = .tmp
    client.sinks.obs.hdfs.idleTimeout = 0
    client.sinks.obs.hdfs.batchSize = 1000
    client.sinks.obs.hdfs.codeC =  
    client.sinks.obs.hdfs.fileType = DataStream
    client.sinks.obs.hdfs.maxOpenFiles = 5000
    client.sinks.obs.hdfs.writeFormat = Writable
    client.sinks.obs.hdfs.callTimeout = 1000000
    client.sinks.obs.hdfs.threadsPoolSize = 10
    client.sinks.obs.hdfs.rollTimerPoolSize = 1
    client.sinks.obs.hdfs.round = false
    client.sinks.obs.hdfs.roundUnit = second
    client.sinks.obs.hdfs.useLocalTimeStamp = false
    client.sinks.obs.hdfs.failcount = 10
    client.sinks.obs.hdfs.fileCloseByEndEvent = true
    client.sinks.obs.hdfs.rollInterval = 30
    client.sinks.obs.hdfs.rollSize = 1024
    client.sinks.obs.hdfs.rollCount = 10
    client.sinks.obs.hdfs.batchCallTimeout = 0
    client.sinks.obs.serializer.appendNewline = true
    client.sinks.obs.channel = flume 

    Modify the following parameters as required. Then save and exit the file.

    • spoolDir
    • trackerDir
    • hdfs.path (AK and SK in the path must be actual values. SK is the encrypted one.)

  4. The Flume client automatically loads the information in the properties.properties file.

    After new log files are generated in the directory specified by spoolDir, the logs will be sent to OBS.