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Quark

  • Quark is a minimal service that tries to make intricacies of working with Spark less crazy

Setting up

./bin/setup-dev-env.sh

This creates everything inside _dependencies directory based on deps file.

deps file is simply a list of downloadables that are needed. They need to be the same in both server and client for easy dev

Supported Languages

  • Python 2 & 3
  • Java 1.8+

Scala as libraries are fine but use JavaAPI to call them. Clojure has always been a pain in this front, so not supporting. Sparkling was a nice little step but not good enough.

Vagrant workflow

I think development and testing should replicate within reason what the production should be.. along with partitions, failures.

Your dev environment is the most ideal this will ever run perfectly. Make sure tests are there for failures and weird data.

So, to that end, you can run vagrant up and by default it will run two vagrant instances - one master, one slave.

You can control that by MESOS_SLAVES environment variable. So to spin up 3 slaves, MESOS_SLAVES=3 vagrant up

Adding environments

It is all managed by deployment-profiles.cfg -- your standard python based configParser with interpolation.

Quark

Supported tasks

test - No production deployments without test code

validate - pylint, flake8 for python and eventually PMD and FindBugs for Java

deploy - for actually running. Running locally is really just deploy with --env local which is default

package - Packages files in projects/{java,python} repos

history - Starts/Stops the history server

  • Quark is not a build system -- it commands other build systems to do stuff

Quark Commands

Running Locally

bin/quark --env local --task deploy examples/python/spark_read_secor_files.py

If you need more parallelization with Spark set master: local[*] -- this will use all the cores available. I set it to 2 by default.

Submitting to Vagrant

bin/quark --env vagrant-submitter --task deploy examples/python/spark_read_secor_files.py

Submitting to Chronos

curl -L -H 'Content-Type: application/json' -X POST -d @chronos-schedules/spark-ap-stats.json http://mesos-slave-002-staging.mistsys.net:4400/scheduler/iso8601
killing jobs
curl -X DELETE http://mesos-slave-002-staging.mistsys.net:4400/scheduler/task/kill/spark-ap-stats

Running from inside Vagrant

bin/quark --env vagrant --task deploy examples/python/spark_read_secor_files.py

Running in Docker

docker run -v $PWD:/data -v $HOME/.aws:/root/.aws -it mistsys/quark --env docker --profiles-file /conf/deployment_profiles.cfg --task deploy /data/projects/python/pace_assoc_event_transformer/assoc_event_processor.py

Running in Mesos/Chronos

Look at the conf/chronos-schedules/quark-assoc-event-transformer-simple.json file

Documentation

bin/quark --task doc

You

Contributing

few things in terms of workflow and contributions 1. Git hygiene —> No stupid merges. if you keep the git commit clean everyone’s happier.. git rebase. I will revert commits and make people do it correctly. I will revert your commit and make you do it correctly. 2. Quark shouldn’t require virtualenv setup —> only stdlib unless it grows bigger than a few files. The way I’m thinking is — Quark really should work despite your virtualenv setup.. keeping deps minimal is a good way to do that