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CData Sync

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Replicate Multiple Kafka Accounts


Replicate multiple Kafka accounts to one or many databases.

CData Sync for Kafka is a stand-alone application that provides solutions for a variety of replication scenarios such as replicating sandbox and production instances into your database. Both Sync for Windows and Sync for Java include a command-line interface (CLI) that makes it easy to manage multiple Kafka connections. In this article we show how to use the CLI to replicate multiple Kafka accounts.

Configure Kafka Connections

You can save connection and email notification settings in an XML configuration file. To replicate multiple Kafka accounts, use multiple configuration files. Below is an example configuration to replicate Kafka to SQLite:

Windows

<?xml version="1.0" encoding="UTF-8" ?> <CDataSync> <DatabaseType>SQLite</DatabaseType> <DatabaseProvider>System.Data.SQLite</DatabaseProvider> <ConnectionString>User=admin;Password=pass;BootStrapServers=https://localhost:9091;Topic=MyTopic;</ConnectionString> <ReplicateAll>False</ReplicateAll> <NotificationUserName></NotificationUserName> <DatabaseConnectionString>Data Source=C:\my.db</DatabaseConnectionString> <TaskSchedulerStartTime>09:51</TaskSchedulerStartTime> <TaskSchedulerInterval>Never</TaskSchedulerInterval> </CDataSync>

Java

<?xml version="1.0" encoding="UTF-8" ?> <CDataSync> <DatabaseType>SQLite</DatabaseType> <DatabaseProvider>org.sqlite.JDBC</DatabaseProvider> <ConnectionString>User=admin;Password=pass;BootStrapServers=https://localhost:9091;Topic=MyTopic;</ConnectionString> <ReplicateAll>False</ReplicateAll> <NotificationUserName></NotificationUserName> <DatabaseConnectionString>Data Source=C:\my.db</DatabaseConnectionString> </CDataSync>

Set BootstrapServers and the Topic properties to specify the address of your Apache Kafka server, as well as the topic you would like to interact with.

Authorization Mechanisms

  • SASL Plain: The User and Password properties should be specified. AuthScheme should be set to 'Plain'.
  • SASL SSL: The User and Password properties should be specified. AuthScheme should be set to 'Scram'. UseSSL should be set to true.
  • SSL: The SSLCert and SSLCertPassword properties should be specified. UseSSL should be set to true.
  • Kerberos: The User and Password properties should be specified. AuthScheme should be set to 'Kerberos'.

You may be required to trust the server certificate. In such cases, specify the TrustStorePath and the TrustStorePassword if necessary.

Configure Queries for Each Kafka Instance

Sync enables you to control replication with standard SQL. The REPLICATE statement is a high-level command that caches and maintains a table in your database. You can define any SELECT query supported by the Kafka API. The statement below caches and incrementally updates a table of Kafka data:

REPLICATE SampleTable_1;

You can specify a file containing the replication queries you want to use to update a particular database. Separate replication statements with semicolons. The following options are useful if you are replicating multiple Kafka accounts into the same database:

You can use a different table prefix in the REPLICATE SELECT statement:

REPLICATE PROD_SampleTable_1 SELECT * FROM SampleTable_1

Alternatively, you can use a different schema:

REPLICATE PROD.SampleTable_1 SELECT * FROM SampleTable_1

Run Sync

After you have configured the connection strings and replication queries, you can run Sync with the following command-line options:

Windows

ApacheKafkaSync.exe -g MyProductionApacheKafkaConfig.xml -f MyProductionApacheKafkaSync.sql

Java

java -Xbootclasspath/p:c:\sqlitejdbc.jar -jar ApacheKafkaSync.jar -g MyProductionApacheKafkaConfig.xml -f MyProductionApacheKafkaSync.sql