Amazon – Streams, Producers, and Consumers

corerootz - Ravi Kiran Krovvidi Amazon, Amazon kinesis

To create a stream

  1. Open the Amazon Kinesis console at https://console.aws.amazon.com/kinesis.
  2. Choose Go to Streams.
  3. In the navigation bar, expand the region selector and choose a region.
  4. Choose Create Stream.
  5. Type a name for your stream (for example, StockTradeStream).
  6. Type 1 for the number of shards, but leave Estimate the number of shards you’ll need collapsed.
  7. Choose Create.

Create IAM Policy and User

Producer

Actions Resource Purpose
DescribeStream Amazon Kinesis stream Before attempting to write records, the producer should check if the stream exists and is active.
PutRecord, PutRecords Amazon Kinesis stream Write records to Streams.

Consumer

Actions Resource Purpose
DescribeStream Amazon Kinesis stream Before attempting to read records, the consumer checks if the stream exists and is active, and if the shards are contained in the stream.
GetRecords, GetShardIterator Amazon Kinesis stream Read records from a Streams shard.
CreateTable, DescribeTable,GetItem, PutItem,PutMetricData, Scan, UpdateItem Amazon DynamoDB table If the consumer is developed using the Kinesis Client Library (KCL), it needs permissions to a DynamoDB table to track the processing state of the application. The first consumer started creates the table.
DeleteItem Amazon DynamoDB table For when the consumer performs split/merge operations on Streams shards.
PutMetricData Amazon CloudWatch log The KCL also uploads metrics to CloudWatch, which are useful for monitoring the application.

 

To create an IAM policy

  1. Determine the Amazon Resource Name (ARN) for the new stream. The ARN format is as follows: 
    arn:aws:kinesis:region:account:stream/name
    region
    The region code; for example, us-west-2. For more information, see Region and Availability Zone Concepts.

    account
    The AWS account ID, as shown in Account Settings.

    name
    The name of the stream from Step 1: Create a Stream, which is StockTradeStream.

    1. Choose Select next to Policy Generator.
    2. Choose Amazon Kinesis as the AWS service.
    3. Select DescribeStream, GetShardIterator, GetRecords, PutRecord, and PutRecords as the allowed actions.
    4. Type the ARN that you created in Step 1.
    5. Use Add Statement for each of the following:
      AWS Service Actions ARN
      Amazon DynamoDB CreateTable, DeleteItem,DescribeTable, GetItem,PutItem, PutMetricData,Scan, UpdateItem The ARN you created in Step 2
      Amazon CloudWatch PutMetricData *

      The asterisk (*) is used when specifying an ARN is not required. In this case, it’s because there is no specific resource in CloudWatch on which the PutMetricData action is invoked.

 

 

 

 

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