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Flink/Docker/Python example

(Optional) Choose Flink docker image

export FLICK_DOCKER_IMAGE_NAME=flink-alpine

Start Flink cluster

Execute

docker-compose up

and check Flink Dashboard at http://localhost:8081 (or whatever ip is assigned - see docker-machine ip).

  • Two nodes are started - JobManager & TaskManager.
  • Project folder is mapped as /app/ to both nodes.

Trigger hello_world.py Flink job

Running

./trigger_helloworld.sh

will start a Flink job that outputs "Hello World" into a timestamped file in out folder.

$ ./trigger_helloworld.sh
Starting execution of program
Program execution finished
Job with JobID af08dc721ea929cdb45cdd2f3cee949d has finished.
Job Runtime: 4542 ms

$ ls out
helloworld_1539091504.366000

$ cat out/helloworld_1539091504.366000
Hello World

For simplicity pyflink-stream.sh is triggered from within job manager node without an additional "detached launcher" node.