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Quick Start

Prerequisites

Install the helm chart for Flink on Kubernetes. See Flink on Kubernetes for more details.

Make sure local Docker has been assigned at least 8 cores and 8G memory.

Setting up a docker registry

  • Point docker-cli to Docker running in minikube

    eval $(minikube -p minikube docker-env)

  • Start local Docker registry in minikube Docker (the docker command is talking to minikube Docker)

    docker run -d -p 5001:5000 --restart=always --name registry registry:2

    We tunnel port 5001 to 5000, you can choose any available port.

Building the Hudi Flink Docker Image

We need to mount a local path on the host for all containers in minikube to work with.

mkdir /tmp/minikubedata
minikube mount /tmp/minikubedata:/data &

We need a custom docker image that extends the flink base image and adds the hudi flink example jar to it. You can build this docker image by running the following command:

./gradlew :example:dockerPushImage

This should have pushed the docker image to the docker registry. You can verify this by running

docker images

This should show you the docker image hudi-flink:latest in the list of images.

REPOSITORY                                           TAG                   IMAGE ID       CREATED          SIZE
localhost:5001/hudi/hudi-flink                       latest                87b936181d74   32 minutes ago   1.05GB

Start Minio server

Create Minio server in Kubernetes.

./gradlew example:createMinioSvc

This will create a pod in Kubernetes that runs the Minio server. You can verify this by running

./gradlew example:openMinioUI

and then opening the Minio UI in your browser by hitting on http://localhost:9090.

Prepare the testing bucket

Use the default credentials: minioadmin and minioadmin to log into the console.

From the UI, manually create a bucket named test.

Destroy or replace Minio server

./gradlew example:deleteMinioSvc
./gradlew example:replaceMinioSvc

Run the Flink Job

We can now submit the Flink job to the Flink cluster running in Kubernetes.

./gradlew example:createFlinkApp

This will create a pod in Kubernetes that runs the Flink job. You can verify this by running

./gradlew example:openFlinkUI

and then opening the Flink UI in your browser by hitting on http://localhost:8081.

Destroy or replace Flink app

./gradlew example:deleteFlinkApp
./gradlew example:replaceFlinkApp