Mesos Cluster inside of Docker (for testing)

This Docker Compose config borrows ideas and code from:

Versions

Mesos Master: 0.26.0-0.2.145
Mesos Slave: 0.26.0-0.2.145
Marathon: Latest

Special instructions for Mac OS X users

Note: This assumes your vbox name for your Docker-Machine VM is called default. Also assumes you are using VirtualBox.

Ensure the DNS resolves on the host machine. This should be a one time thing unless you recreate your host VM.

$ VBoxManage modifyvm default --natdnshostresolver1 on

Start the Docker host VM and then get the IP of the Docker host

$ docker-machine start default
$ docker-machine env default
$ eval "$(docker-machine env default)"

You should see in the output something similar to this:

export DOCKER_HOST="tcp://192.168.99.100:2376"

Update the hosts file:

$ TMP_DOCKER_HOST=${DOCKER_HOST##*/}
$ TMP_DOCKER_HOST=${TMP_DOCKER_HOST%:*}
$ echo "${TMP_DOCKER_HOST} localdocker" | sudo tee -a /etc/hosts

Note: If you plan to add more slaves (now called agents) or Chronos you will probably want to ensure your host VM has additional memory allocated to it. I set mine at 4096 MB (in Virtualbox).

Usage

Run the Mesos cluster:

$ docker-compose up -d

Load the following URLs in a browser:

Mesos Master UI: http://localdocker:5050/
Marathon UI: http://localdocker:8080/

To stop the cluster:

$ docker-compose stop

Deploying a test app via the Marathon API:

$ curl -X POST -H "Accept: application/json" -H "Content-Type: application/json" localdocker:8080/v2/apps -d \
'{"id": "hello-test","cpus": 0.1,"mem": 32,"cmd": "echo hello; sleep 5", "instances": 1}'

Deploying a Docker container via the Marathon API:

curl -X POST -H "Accept: application/json" -H "Content-Type: application/json" localdocker:8080/v2/apps -d ' \
{
    "id": "inky",
    "container": {
        "docker": {
            "image": "mesosphere/inky"
        },
        "type": "DOCKER",
        "volumes": []
    },
    "args": ["hello"],
    "cpus": 0.2,
    "mem": 32.0,
    "instances": 1
}'