Delivering data from Yandex Managed Service for Apache Kafka® using Yandex Data Transfer

A Yandex StoreDoc cluster can ingest data from Apache Kafka® topics in real time.

To start data delivery:

1. Prepare your test data.
2. Prepare and activate the transfer.
3. Test the transfer.

If you no longer need the resources you created, delete them.

Required paid resourcesRequired paid resources

• Managed Service for Apache Kafka® cluster: computing resources allocated to hosts, storage and backup size (see Managed Service for Apache Kafka® pricing).
• Yandex StoreDoc cluster: computing resources allocated to hosts, storage and backup size (see Yandex StoreDoc pricing).
• Public IP addresses if public access is enabled for cluster hosts (see Virtual Private Cloud pricing).

Getting startedGetting started

1. Set up your data delivery infrastructure:

   Manually

   Terraform

   Note

   Public access to cluster hosts is required if you plan to connect to the cluster via the internet. This connection option is simpler and is recommended for the purposes of this guide. You can connect to non-public hosts as well but only from Yandex Cloud virtual machines located in the same cloud network as the cluster.

   1. Create a Managed Service for Apache Kafka® source cluster with your preferred configuration. For connections to the cluster from the user's local machine, rather than the Yandex Cloud network, enable public access to the cluster when creating it.

   2. In the source cluster, create a topic named sensors.

   3. In the source cluster, create a user named mkf-user with the ACCESS_ROLE_PRODUCER and ACCESS_ROLE_CONSUMER permissions for the new topic.

   4. Create a Yandex StoreDoc target cluster with the following settings:

      • Database name: db1.

      • Username: mmg-user.

      • In the same availability zone as the source cluster.

      • To connect to the cluster from the user's local machine instead of the Yandex Cloud cloud network, enable public access to the cluster hosts.

   5. To connect to the cluster from the user's local machine, configure security groups:

      • Managed Service for Apache Kafka®.
      • Yandex StoreDoc.

   1. If you do not have Terraform yet, install it.

   2. Get the authentication credentials. You can add them to environment variables or specify them later in the provider configuration file.

   3. Configure and initialize a provider. There is no need to create a provider configuration file manually, you can download it.

   4. Place the configuration file in a separate working directory and specify the parameter values. If you did not add the authentication credentials to environment variables, specify them in the configuration file.

   5. Download the data-transfer-mkf-mmg.tf configuration file to your current working directory.

      This file describes:

      • Network.
      • Subnet.
      • Security group and rules required for connection to Managed Service for Apache Kafka® and Yandex StoreDoc clusters.
      • Managed Service for Apache Kafka® source cluster.
      • Apache Kafka® topic named sensors.
      • Apache Kafka® user named mkf-user with ACCESS_ROLE_PRODUCER and ACCESS_ROLE_CONSUMER access permissions for the sensors topic.
      • Yandex StoreDoc target cluster.
      • Yandex StoreDoc database named db1.
      • Yandex StoreDoc user named mmg-user with readWrite access permissions for the db1 database.
      • Source and target endpoints.
      • Transfer.

   6. In the data-transfer-mkf-mmg.tf file, specify these variables:

      • source_kf_version: Apache Kafka® version in the source cluster.
      • source_user_password: mkf-user password in the source cluster.
      • target_mg_version: Yandex StoreDoc version in the target cluster.
      • target_user_password: mmg-user password in the target cluster.
      • transfer_enabled = 0: Disables the creation of endpoints and transfers. They will be created during the preparation of the transfer.

   7. Validate your Terraform configuration files using this command:

      terraform validate
      

      Terraform will display any configuration errors detected in your files.

   8. Create the required infrastructure:

      1. Run this command to view the planned changes:

         terraform plan
         

         If you described the configuration correctly, the terminal will display a list of the resources to update and their parameters. This is a verification step that does not apply changes to your resources.

      2. If everything looks correct, apply the changes:

         1. Run this command:

            terraform apply
            

         2. Confirm updating the resources.

         3. Wait for the operation to complete.

      All the required resources will be created in the specified folder. You can check resource availability and their settings in the management console.

2. Install the following tools:

   • kafkacat: For reading from and writing to Apache Kafka® topics.

     sudo apt update && sudo apt install --yes kafkacat
     

     Check that you can use it to connect to the Managed Service for Apache Kafka® source cluster over SSL.

   • jq: For stream processing of JSON files.

     sudo apt update && sudo apt-get install --yes jq
     

Prepare your test dataPrepare your test data

Suppose the Apache Kafka® sensors topic in the source cluster receives JSON-formatted data from car sensors.

On your local machine, create a sample.json file with the following test data:

{
    "device_id": "iv9a94th6rzt********",
    "datetime": "2020-06-05 17:27:00",
    "latitude": 55.70329032,
    "longitude": 37.65472196,
    "altitude": 427.5,
    "speed": 0,
    "battery_voltage": 23.5,
    "cabin_temperature": 17,
    "fuel_level": null
}
{
    "device_id": "rhibbh3y08qm********",
    "datetime": "2020-06-06 09:49:54",
    "latitude": 55.71294467,
    "longitude": 37.66542005,
    "altitude": 429.13,
    "speed": 55.5,
    "battery_voltage": null,
    "cabin_temperature": 18,
    "fuel_level": 32
}
{
    "device_id": "iv9a94th6rzt********",
    "datetime": "2020-06-07 15:00:10",
    "latitude": 55.70985913,
    "longitude": 37.62141918,
    "altitude": 417.0,
    "speed": 15.7,
    "battery_voltage": 10.3,
    "cabin_temperature": 17,
    "fuel_level": null
}

Prepare and activate a transferPrepare and activate a transfer

Test the transferTest the transfer

Check that data from the Managed Service for Apache Kafka® source cluster’s topic is transferred to the Yandex StoreDoc cluster:

1. Send data from sample.json to the Managed Service for Apache Kafka® sensors topic using jq and kafkacat:

   jq -rc . sample.json | kafkacat -P \
      -b <broker_host_FQDN>:9091 \
      -t sensors \
      -k key \
      -X security.protocol=SASL_SSL \
      -X sasl.mechanisms=SCRAM-SHA-512 \
      -X sasl.username="mkf-user" \
      -X sasl.password="<user_password_in_source_cluster>" \
      -X ssl.ca.location=/usr/local/share/ca-certificates/Yandex/YandexInternalRootCA.crt -Z
   

   To learn more about setting up an SSL certificate and using kafkacat, see Connecting to an Apache Kafka® cluster from applications.

2. Verify that the Yandex StoreDoc cluster's sensors collection contains the data you sent:

   1. Connect to the Yandex StoreDoc cluster.

   2. Retrieve the contents of the sensors collection using the following query:

      db.sensors.find()
      

Delete the resources you createdDelete the resources you created

Some resources are not free of charge. Delete the resources you no longer need to avoid paying for them: