Mesos Example VM

This example uses CentOS 6.3 as base image to validate whether Mesos/Marathon can run on old CentOS 6.3 boxes.

1. Prerequisite Softwares

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• Vagrant (https://www.vagrantup.com/)
• Virtualbox (https://www.virtualbox.org/)

To access each node from your host browser, add following to your host file /etc/hosts

192.168.50.5 mesos-master mesos-master
192.168.50.6 mesos-slave-1 mesos-slave-1
192.168.50.7 mesos-slave-2 mesos-slave-2
192.168.50.8 mesos-slave-3 mesos-slave-3

2. Start & Stop VMs

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To start VMs

vagrant up

To stop VMs

vagrant halt

3. Access VMs

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To access mesos master VM

vagrant ssh mesos-master

To access mesos slave VM

vagrant ssh mesos-slave-1

4. Web Consoles

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Mesos UI

http://192.168.50.5:5050

Marathon Console (for running apps)

http://192.168.50.5:8080

Chronos (for scheduler jobs)

http://192.168.50.5:4400

5. Run an Example Application

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5-1. Running a play application.

First, go to Marathon console and click [+New App] button. Input following values and click [+Create] button to start application.

ID: hello
CPUs: 0.1
Memory(MB): 16
Instances: 1
Command: ./Hello-*/bin/hello -Dhttp.port=$PORT
URIs: http://downloads.mesosphere.io/tutorials/PlayHello.zip

or you can run the following curl command

curl -i -H "Content-Type: application/json" -X POST \
 --data '{
  "cmd": "./Hello-*/bin/hello -Dhttp.port=$PORT",
  "cpus": 0.1,
  "id": "hello",
  "instances": 1,
  "mem": 16,
  "uris": ["http://downloads.mesosphere.io/tutorials/PlayHello.zip"]
}' http://192.168.50.5:8080/v2/apps/

5-2. Scaling out

If you want to scale out, you can increase number of instances with below command:

curl -i -H "Content-Type: application/json" -X PUT \
 --data '{
  "cmd": "./Hello-*/bin/hello -Dhttp.port=$PORT",
  "cpus": 0.1,
  "id": "/hello",
  "instances": 3,
  "mem": 16,
  "disk": 0,
  "uris": ["http://downloads.mesosphere.io/tutorials/PlayHello.zip"]
}' http://192.168.50.5:8080/v2/apps/hello

curl -i -H "Content-Type: application/json" -X PUT
--data '{ "instances": 2 }' http://192.168.50.5:8080/v2/apps/hello

5-3. Destroy instances

To destroy app:

curl -i -X DELETE http://192.168.50.5:8080/v2/apps/hello