Skip to content
hands-on lab

Configuring Health Checks for Your Marathon Applications in DC/OS

Difficulty: Beginner
Duration: Up to 50 minutes
Students: 50
Get guided in a real environmentPractice with a step-by-step scenario in a real, provisioned environment.
Learn and validateUse validations to check your solutions every step of the way.
See resultsTrack your knowledge and monitor your progress.
About
Author

Description

Lab Overview

The Marathon container orchestration tool in DC/OS supports two types of checks to test the availability of applications: health checks and readiness checks. Health checks monitor the availability of an application's instances throughout the lifetime of the application. Readiness checks allow you to indicate when an application has finished initializing. In this Lab, you will see how to keep your applications up and running automatically by configuring health checks for your Marathon applications in DC/OS.

Lab Objectives

Upon completion of this Lab you will be able to:

  • Add health and readiness checks to Marathon applications
  • Describe the differences between health and readiness checks
  • Diagnose issues related to health and readiness checks

Lab Prerequisites

You should be familiar with:

  • Basic DC/OS concepts including master nodes, agents, services, tasks, and Marathon
  • Working at the command-line in Linux
  • AWS services to optionally understand the architecture of the pre-created DC/OS cluster

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

March 29th, 2021 - Minor update to instructions for connecting to the NAT Instance

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

Covered topics

Deployment
Compute
DevOps
Mesosphere
Hands-on Lab UUID

Lab steps

0 of 7 steps completed.Use arrow keys to navigate between steps. Press Enter to go to a step if available.
  1. Logging In to the Amazon Web Services Console
  2. Understanding the DC/OS Cluster Architecture
  3. Connecting to the DC/OS Cluster NAT Instance using SSH
  4. Installing the DC/OS CLI on Linux
  5. Adding a Health Check to a Marathon Application
  6. Adding a Readiness Check to a Marathon Application
  7. Validate AWS Lab

Lab Rules