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Overview

This topic describes the typical steps to execute a chaos experiment, and delves into how you can deploy the HCE application in two different modes, that is, automated onboarding and guided onboarding.

Before you begin​

tip

Currently, this feature is behind the feature flag CHAOS_V2_ENABLED. Contact Harness support to enable the feature.

Steps to create and execute a HCE experiment​

You can execute a chaos experiment by:

  1. Fulfilling the resource requirements: In this step, you can create resources or get the required permissions to create the necessary resources.
  2. Adding an environment: A chaos experiment is performed within a chaos environment that houses the necessary infrastructure.
  3. Adding a chaos infrastructure: The required chaos infrastructure is created within a chaos environment.
  4. Validating the chaos infrastructure installation: Once you create your chaos infrastructure, ensure that it has been created in the right manner.
  5. Creating a demo application: You can either create a demo application or use your application on which you can execute chaos experiments.
  6. Creating and running a chaos experiment: Once you have set up your application, you can decide which resources to target and execute the chaos experiments on.

The steps mentioned earlier required some reading and exploring, but if you want a head start to your chaos journey, enter automated onboarding and guided onboarding. These onboarding methods will guide you in creating and executing chaos experiments with the click of a button, without the hassle of explicitly creating environment, infrastructure and other entities!

Automated and guided onboarding​

You can execute chaos experiments without explicitly installing the environment or infrastructure or creating an experiment by specifying tunables.

  1. To get hands-on experience, navigate to the Chaos module and select Overview. Select Select a cluster, where you can choose between automatic and guided onboarding.

  1. If you choose Yes, in a single step!, go to automated onboarding, and if you choose No, I will choose, go to guided onboarding.

tip

Previously, HCE provided a dedicated chaos infrastructure to execute chaos experiments. With the current updates, the chaos-runner is transient and you can execute chaos experiments by installing Harness delegate, thereby eliminating the need to install Harness chaos infrastructure and other additional components. Once you have installed Harness delegate, you can reuse it to execute experiments, discover services, create network maps and so on.

Next steps​