Using Marathon to Schedule Docker Containers on DC/OS

Lab Overview

DC/OS includes the powerful container orchestration tool called Marathon. Marathon supports multiple container types including Docker. In this Lab, you will deploy a Marathon application using a Docker container. As the Lab progresses, you will use additional Docker containers to load balance, scale the application, and persist the application data in a database. You will use the DC/OS command-line interface (CLI) to accomplish these feats.

Lab Objectives

Upon completion of this Lab you will be able to:

• Write Marathon application definitions
• Deploy Marathon applications using Docker containers from the DC/OS CLI
• Scale and load balance Marathon applications using Docker containers
• Use volumes to persist data beyond the lifetime of a container

Lab Prerequisites

You should be familiar with:

• Basic DC/OS concepts including master nodes, agents, services, tasks, and Marathon
• Basic Docker concepts including images, tags, and networks
• Working at the command-line in Linux
• AWS services knowledge is useful in order to understand the architecture of the pre-created DC/OS cluster, but not required

Lab Environment

Before completing the Lab instructions, the environment will look as follows:

After completing the Lab instructions, the environment should look similar to:

Updates

August 1st, 2021 - Resolved an issue preventing the DC/OS cluster from provisioning

October 2nd, 2020 - Replaced CoreOS virtual machines (no longer available in AWS) with CentOS

January 10th, 2019 - Added a validation Lab Step to check the work you perform in the Lab