examples.md

Examples

Running a simple health check task

This runs the dkeis/dht-probe image with the default command, it will check if we can find peers on the network with dht.

{
    "docker_image": "dkeis/dht-probe",
    "task_cpus": 0.1,
    "task_mem": 100.0
}

Interfacing with docker on the host

By mounting the docker socket into the container the application is able to interface with the docker api. Here we use cibox to run tests in a dynamically created docker container.

Beware security implications of mounting the docker socket as it gives full access to the host system.

{
    "command": "/cibox https://git@github.com/keis/cibox.git --matrix-id 0",
    "docker_image": "dkeis/cibox",
    "task_cpus": 0.1,
    "task_mem": 100.0,
    "volumes": [
        {
            "container_path": "/var/run/docker.sock",
            "host_path": "/var/run/docker.sock"
        }
    ]
}

Building a docker image

The docker api also enables us to build docker images and by combining this with a list of uris that will be downloaded by mesos we can build images from arbitrary dockerfiles by url.

{
    "command": "docker build -t dkeis/golang /tmp/build && docker login -u $USER -p $PASSWORD && docker push dkeis/golang",
    "docker_image": "docker:1.8",
    "env": {
        "USER": "dkeis"
    },
    "masked_env": {
        "PASSWORD": "myactualpassword"
    },
    "task_cpus": 0.1,
    "task_mem": 100.0,
    "uris": [
        "https://raw.githubusercontent.com/docker-library/golang/3cdd85183c0f3f6608588166410d24260cd8cb2f/1.6/alpine/Dockerfile"
    ],
    "volumes": [
        {
            "container_path": "/var/run/docker.sock",
            "host_path": "/var/run/docker.sock"
        },
        {
            "container_path": "/tmp/build/Dockerfile",
            "host_path": "Dockerfile"
        }
    ]
}

Running a task with certain attributes

This configures a task to run the busybox image with a basic loop outputting the time on any Mesos Slave with the attribute "role" set to "build".

{
    "docker_image": "busybox",
    "command": "for i in $(seq 1 5); do echo \"`date` $i\"; sleep 5; done",
    "task_cpus": 0.1,
    "task_mem": 100.0,
    "slave_constraints": [
        {
            "attribute_name": "role",
            "attribute_value": "build"
        }
    ]
}

Mesos slaves can be configured with arbitrary attributes. See the documentation for more information on how to configure attributes.