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The Foundry

A vagrant configuration to set up a cluster of mesos master, slaves and zookeepers through ansible. It will also set up a seperate Kafka cluster that piggybacks off Zookeeper from the Mesos cluster.

This also installs HDFA HA (Namenodes on mesos-master1 and mesos-master2) and Spark (spark-submit at /home/spark/spark/bin/spark-submit on mesos-master3).

For Kafka and Bamboo, just uncomment the Kafka VM in the Vagrantfile and Inventory File. And for Bamboo, uncomment in the cluster.yml playbook. These were turned off since it takes forever to Vagrant Up with them, and will probably be re-enabled soon.

Usage

Make sure you have the vagrant-hostmanager plugin installed

vagrant plugin install vagrant-hostmanager

Clone the repository, and run:

vagrant up

This will provision a mini Mesos cluster with one master, three slaves, and one Kafka instance. The Mesos master server also contains Zookeeper and the Marathon framework. The slave will come with HAProxy, Docker, and Bamboo installed.

After provisioning the servers you can access Marathon here: http://100.0.10.11:8080/ and the master itself here: http://100.0.10.11:5050/

Bamboo handles service discovery and reconfigures HAProxy. See usage instructions here: https://github.com/QubitProducts/bamboo

Non-High Availability Mode

There is also a vagrantfile for a normal 1 slave, 1 master setup (which will save a lot of time provisioning) in /nonHA

Chronos

You can register Chronos as a framework in a docker container with the following command:

curl -X POST -H "Content-Type: application/json" http://100.0.10.11:8080/v2/apps -d@docker-payloads/chronos.json

You can access the Chronos UI at http://mesos-slave:8081

Deploying Docker containers

Submitting a Docker container to run on the cluster is done by making a call to Marathon's REST API:

First create a file, ubuntu.json, with the details of the Docker container that you want to run:

{
  "container": {
    "type": "DOCKER",
    "docker": {
      "image": "libmesos/ubuntu"
    }
  },
  "id": "ubuntu",
  "instances": "1",
  "cpus": "0.5",
  "mem": "128",
  "uris": [],
  "cmd": "while sleep 10; do date -u +%T; done"
}

And second, submit this container to Marathon by using curl:

curl -X POST -H "Content-Type: application/json" http://100.0.10.11:8080/v2/apps [email protected]

You can monitor and scale the instance by going to the Marathon web interface linked above.

Using Spark

Load up the spark-shell using

/home/spark/spark/bin/spark-shell --master mesos://mesos-master1:5050,mesos-master2:5050,mesos-master3:5050 --executor-memory 128M

And execute a simple script

sc.parallelize(1 to 10).count()

Go to http://mesos-master3:5050/#/frameworks and see the workers in action

There should also be a Spark UI at http://mesos-master3:4040

You can run a Spark Jobserver with the following:

curl -X POST -H "Content-Type: application/json" http://100.0.10.11:8080/v2/apps -d@docker-payloads/spark-job-server-host.json

Spark Jobserver Running at http://mesos-master:8090

curl --data-binary @job-server-tests/target/job-server-tests-0.4.2-SNAPSHOT.jar mesos-slave:8090/jars/test

curl -d "input.string = a b c a b see" 'mesos-slave:8090/jobs?appName=test&classPath=spark.jobserver.WordCountExample'
{
  "status": "STARTED",
  "result": {
    "jobId": "0d734d5b-9dc8-4b85-aa2e-3f36b0fe4d91",
    "context": "abbe3d0b-spark.jobserver.WordCountExample"
  }
}

From this point, you could asynchronously query the status and results:

curl mesos-master:8090/jobs/3d4ef63e-1222-41f1-ad43-164e0412a99b
{
  "status": "OK",
  "result": {
    "a": 2,
    "b": 2,
    "see": 1,
    "c": 1
  }
}

Hadoop Example

Note: This will only work on a sufficiently large cluster. This may not be possible via VMs on your local machine.

su mapred
export HADOOP_MAPRED_HOME=/usr/lib/hadoop-0.20-mapreduce
export MESOS_NATIVE_LIBRARY=/usr/local/lib/libmesos.so
export MESOS_NATIVE_JAVA_LIBRARY=/usr/local/lib/libmesos.so
echo "Hello World Bye World" > /tmp/file0
echo "Hello Hadoop Goodbye Hadoop" > /tmp/file1
hdfs dfs -mkdir -p /user/foo/data
hdfs dfs -copyFromLocal /tmp/file? /user/foo/data
hadoop jar /usr/lib/hadoop-0.20-mapreduce/hadoop-examples-2.5.0-mr1-cdh5.2.0.jar wordcount /user/foo/data /user/foo/out
hdfs dfs -ls /user/foo/out
hdfs dfs -cat /user/foo/out/part*