Configuring in Standalone Mode

The section describes how to configure and execute workers in standalone mode.

Standalone mode is the simplest mode, where a single process is responsible for executing all connectors and tasks. Since it is a single process, it requires minimal configuration.

Configuring and running in standalone mode, involves configuring the standalone properties and connector parameters before executing the standalone shell command along with the properties files on the command line.

The following parameters must be provided in the connect-standalone.properties file.

  • offset.storage.file.filename - Storage for connector offsets which are stored on the local file system in standalone mode. Using the same file leads to offset data being deleted or overwritten with different values.
  • rest.port - Port the REST interface listens on for HTTP requests. If you run multiple standalone instances on the same host, this parameter must have different values for each instance.
Note: If you are running multiple standalone instances on the same host, these parameters must be different for each instances. Therefore, an additional properties file is created for the instance with different parameter values.

To run a worker in standalone mode:

  1. Edit the ./config/connect-standalone.properties file and add the name of the local file that will store the connector offsets.
  2. Edit the quickstart-sqlite.properties file (JDBC connector configuration file).
  3. Run the ./bin/connect-standalone.sh command along with the properties files on the command line.
For example:
cd /opt/mapr/kafka/kafka-0.9.0
./bin/connect-standalone.sh
./config/connect-standalone.properties
/opt/mapr/kafka-connect-jdbc/kafka-connect-jdbc-2.0.1/etc/kafka-connect-jdbc/quickstart-sqlite.properties
        

The first parameter is always a configuration file for the worker. This configuration gives you control over settings such as which cluster to use and the serialization format. See JDBC Connector for more information. All additional parameters should be connector configuration files. Each file contains a single connector configuration.