The following instructions guide you through the installation a simple Flink cluster to locally execute Flink programs on your machine.
1. Download and install Flink for local execution
In order to execute programs on a running Flink instance (rather than from within your IDE), you need to install Flink on your machine. To do so, follow these steps:
- Download the Apache Flink 1.7.1 release from the download page. Since we won’t use HDFS or YARN, any Hadoop version will work, including the “without bundled hadoop” version.
- Extract the downloaded archive
- The resulting folder contains a Flink setup that can be locally executed without any further configuration.
2. Start a local Flink instance
If you have a local Flink installation, you can easily bring up a small cluster for local testing.
On UNIX system you can start a Flink instance as follows:
cd /to/your/flink/installation ./bin/start-cluster.sh
On Windows you have to run the following commands
cd C:\to\your\flink\installation .\bin\start-cluster.bat
3. Validate that Flink is running
You can validate that a local Flink instance is running by looking at the log files in
./log/ or opening the JobManager’s webinterface at http://localhost:8081.
4. Run an application
The How to do the Exercises page explains how to build and package a Flink program with Maven. You can use the Flink CLI to run applications that have been packaged into a jar file. Here’s an example of running one of the examples, but you’ll probably need to make some adjustments to the paths and version number:
flink run -c \ com.dataartisans.flinktraining.examples.datastream_java.basics.RideCount \ ~/flink-training-exercises/target/flink-training-exercises-2.5.2.jar
Because this jar file contains many applications, we’ve had to specify which class to run, using the -c flag.
Note that the taskmanager(s) will write their output to files in the
5. Stop the local Flink instance
On UNIX you call
On Windows you quit the running process with