Interconnecting Flume with OBS

This section applies to MRS 3.x or later.

Before performing the following operations, ensure that you have configured a storage-compute decoupled cluster by referring to Configuring a Storage-Compute Decoupled Cluster (Agency) or Configuring a Storage-Compute Decoupled Cluster (AK/SK).

1. Configure an agency.
   1. Log in to the MRS console. In the navigation pane on the left, choose Clusters > Active Clusters.
   2. Click the name of a cluster to go to the cluster details page.
   3. On the Dashboard page, click Synchronize on the right of IAM User Sync to synchronize IAM users.
   4. Click Manage Agency on the right of Agency, select the target agency, and click OK.

2. Create an OBS file system for storing data.
   1. Log in to the OBS console.
   2. In the navigation pane on the left, choose Parallel File Systems. On the displayed page, click Create Parallel File System.
   3. Enter the file system name, for example, esdk-c-test-pfs1, and set other parameters as required. Click Create Now.
   4. In the parallel file system list on the OBS console, click the created file system name to go to its details page.
   5. In the navigation pane on the left, choose Files and click Create Folder to create the testFlumeOutput folder.

3. Prepare the properties.properties file and upload it to the /opt/flumeInput directory.
   1. Prepare the properties.properties file on the local host. Its content is as follows:

      # source
      server.sources = r1
      # channels
      server.channels = c1
      # sink
      server.sinks = obs_sink
      # ----- define net source -----
      server.sources.r1.type = seq
      server.sources.r1.spooldir = /opt/flumeInput
      # ---- define OBS sink ----
      server.sinks.obs_sink.type = hdfs
      server.sinks.obs_sink.hdfs.path = obs://esdk-c-test-pfs1/testFlumeOutput
      server.sinks.obs_sink.hdfs.filePrefix = %[localhost]
      server.sinks.obs_sink.hdfs.useLocalTimeStamp = true
      # set file size to trigger roll
      server.sinks.obs_sink.hdfs.rollSize = 0
      server.sinks.obs_sink.hdfs.rollCount = 0
      server.sinks.obs_sink.hdfs.rollInterval = 5
      #server.sinks.obs_sink.hdfs.threadsPoolSize = 30
      server.sinks.obs_sink.hdfs.fileType = DataStream
      server.sinks.obs_sink.hdfs.writeFormat = Text
      server.sinks.obs_sink.hdfs.fileCloseByEndEvent = false
      
      # define channel
      server.channels.c1.type = memory
      server.channels.c1.capacity = 1000
      # transaction size
      server.channels.c1.transactionCapacity = 1000
      server.channels.c1.byteCapacity = 800000
      server.channels.c1.byteCapacityBufferPercentage = 20
      server.channels.c1.keep-alive = 60
      server.sources.r1.channels = c1
      server.sinks.obs_sink.channel = c1

      

      The value of server.sinks.obs_sink.hdfs.path is the OBS file system created in 2.

   2. Log in to the node where the Flume client is installed as user root.
   3. Create the /opt/flumeInput directory and create a customized .txt file in this directory.
   4. Log in to MRS Manager.
   5. Choose Cluster > Name of the target cluster > Services > Flume. On the displayed page, click Configurations and then Upload File in the Value column corresponding to the flume.config.file parameter, upload the properties.properties file prepared in 3.a, and click Save.

4. View the result in the OBS system.
   1. Log in to the OBS console.
   2. Click Parallel File Systems and go to the folder created in 2 to view the result.