Spark applications must be configured with a set of Kafka topics that are either shared between multiple applications or dedicated to specific applications. The assigned topics must be created before you submit an application to the Spark servicecluster. Before you can create the topics you must start the Zookeeper and Kafka and Zookeeper services. 

Starting Services

The prerequisites for starting services are the following:

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Prerequisites:

• Prepare scripts according to  Preparing and Creating Scripts for KPI Management

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Starting

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.  Startup Spark cluster:

    $ start_master_workers.sh ...
 
.  Submit the app:
    $ submit.sh kpiapp ...

You can now confirm the status of the Spark cluster. Open a browser and go to http://<master host>:8080.
Image Removed 
Spark UI 

Creating Kafka Topics

Clusters

To start a cluster follow the steps:

1. Start Zookeeper and Kafka
   To start Zookeeper, run the following:

   bin/zookeeper-server-start.sh config/zookeeper.properties
   
   To start Kafka, run:
   bin/kafka-server-start.sh config/server.properties

2. Create Kafka topics and partitions using

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1. the scripts included in the Kafka installation.
   The names of the topics must correspond to the Spark application configuration.
   

Use a replication factor that is greater than one (1) to make sure that data is replicated between Kafka brokers. This decreases the risk of losing data in case of issues with the brokers. This is how to create topics, assuming the current working directory is the Kafka software folder:

$ mzsh mzadmin/<password> kafka./bin/kafka-topics.sh --servicecreate --keytopic <key><input \topic> --create bootstrap--topicserver <output\
topic>localhost:9092 --partitions <number of partitions> --replication-factor <number of replicas>
$ mzsh mzadmin/<password> kafka --service-key \
<key> --create --topic <input topic>./bin/kafka-topics.sh --create --topic <output topic> --bootstrap-server \
localhost:9092 --partitions <number of partitions> --replication-factor <number of replicas>
$ mzsh mzadmin/<password> kafka --service-key <key> \
./bin/kafka-topics.sh --create --topic <alarm topic> --bootstrap-server \
localhost:9092 --partitions <number of partitions> --replication-factor <number of replicas>

Example - Creating Kafka

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Topics

./bin/kafka-topics.sh --create --topic kpi-output --partitions 6 --replication-factor 1

./bin/kafka-topics.sh --create --topic kpi-input --partitions 6 --replication-factor 1

./bin/kafka-topics.sh --create --topic kpi-alarm --partitions 6 --replication-factor 1

Example - Creating Kafka topics, overriding retention settings

./bin/kafka-topics.sh --create --topic kpi-output --partitions 6 --replication-factor 1 --config retention.ms=86400000

./bin/kafka-topics.sh --create --topic kpi-input --partitions 6 --replication-factor 1 --config retention.ms=86400000

./bin/kafka-topics.sh --create --topic kpi-alarm --partitions 6 --replication-factor 1 --config retention.ms=86400000

3. Run the following command to start Spark:
   $ start_master_workers.sh ...
   To submit the app to the Spark cluster

   .  Submit the app:
    $ submit.sh kpiapp ...
   

4. You can now confirm the status of the Spark cluster. Open a browser and go to http://<master host>:8080.
   

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Spark UI