ohrobin / dcos-flink-service

dcos-flink-service

This is experimental!

The DC/OS service repository for Apache Flink.

This repository consists of two parts:

• The docker container for the Apache Flink AppMaster/JobManager.
• The service package.

This repository contains submodules, so use following commands to clone the repository:

git clone --recursive https://github.com/mesosphere/dcos-flink-service

Testing Apache Flink

Prequisite:

• DC/OS 1.8 cluster
• DC/OS CLI installed.

1. Install local package repository.
2. dcos marathon app add https://raw.githubusercontent.com/mesosphere/dcos-flink-service/master/service/marathon-universe.json and wait until deployment has finished.
3. dcos package repo add --index=0 dev-universe http://universe.marathon.mesos:8085/repo
4. Install Flink service
5. dcos package install flink
6. Access UI
7. You can access the UI via services via /service/flink/. Unfortunately you cannot upload a job jar via UI in this case.
8. Use marathon-lb dcos package install marathon lb and update the marathon app definition with the following labels:

  "labels":{
    "HAPROXY_GROUP":"external",
    "HAPROXY_0_VHOST":"<public host name, e.g., ELB>"
  }

3. Submit Job

4. UI

5. Docker Container

   dcos node ssh --leader --master-proxy

   ./bin/flink run -m <jobmangerhost>:<jobmangerjobmanager.rpc.port> ./examples/batch/WordCount.jar --input file:///etc/resolv.conf --output file:///etc/wordcount_out

Note that the input/output is local to the container, so most likely you want to configure HDFS or S3.

AppMaster Docker Container

The main DC/OS service launches on this container. It can be easily built from the root of this repository by executing

make -C container/appmaster

NOTE

The AppMaster image requires currently an own master build of Flink. Compiling Flink takes about 10-15 minutes. If you are working with this repository and have already built Flink once, you can invoke make -C container/appmaster build-container which only rebuilds the docker image (this works as long as you don't make changes to Flink or upgrade it, then you need a full rebuild).

Service Package

The service package contains all needed files to make up an own DC/OS universe package.

To try them out, you need a running DC/OS cluster and a correctly setup dcos binary pointing to your cluster. Also you need to create your own universe service that will serve the Flink package on your cluster. Refer to the instructions here to set up your own universe server.

Todos

• CLI support (in progress)
• HA setup (requires HDFS...)
• Update to release version once it is available
• Add more examples