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In this tutorial, you’ll create an AWS Fault Injection Simulator (FIS) experiment template that injects memory stress into a pod running on Amazon EKS. You will configure the fault action, define the target pods, and execute the experiment while monitoring performance in real time.
  • An AWS account with administrative permissions
  • An existing Amazon EKS cluster (e.g., pet-site)
  • A Kubernetes service account IAM role with FIS permissions
  • AWS FIS enabled in your account

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1. Create the FIS Experiment Template

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1.1 Configure Basic Settings

  1. Sign in to the AWS FIS console and go to Experiment templates.
  2. Click Create experiment template.
  3. Provide the following details:
    • Name: EKS-Memory-Stress
    • Description: Inject memory stress into pods on EKS for resilience testing

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1.2 Add a Memory Stress Action

  1. Under Actions, click Add action.
  2. Set these parameters:
    • Action name: eks-memory
    • Action type: aws:eks:inject-fault
    • Fault action: Pod Memory Stress
The image shows a form for adding an action in an experiment template, specifically for an EKS memory stress test, with fields for name, description, action type, and target.

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1.3 Specify Action Parameters

Configure the memory stress parameters:
ParameterValue
Duration9 minutes
RoleKubernetes service account IAM role for FIS
Percentage50
Setting Percentage to 50 limits memory consumption to half of available memory on targeted pods.
The image shows a configuration interface for setting optional parameters related to Kubernetes fault orchestration, including fields for annotations, labels, security policy, and memory usage settings.

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2. Define the Target Pods

  1. In the Targets section, click Add target.
  2. Enter the following values:
    • Cluster: pet-site
    • Namespace: default
    • Selector type: Label
    • Selector value: app=pet-site
The image shows a configuration screen for an AWS EKS memory stress test, with actions and targets specified for a pod.
  1. Review and save the target configuration.
The image shows a configuration screen for setting up an EKS-Memory action in a cloud service interface, with fields for resource parameters and selection options.

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3. Review and Create

  1. Verify all settings:
    • Action: eks-memory (Pod Memory Stress)
    • Target: Pods labeled app=pet-site in the default namespace on pet-site cluster
  2. Attach the experiment IAM role to allow publishing logs to CloudWatch.
  3. Click Create experiment template.

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4. Execute and Monitor the Experiment

  1. From the Experiment templates list, select EKS-Memory-Stress and click Start experiment.
  2. Let the experiment run for the configured duration (9 minutes).
  3. Monitor performance metrics in:
    • CloudWatch RUM
    • EKS container performance dashboards
Compare metrics before, during, and after the memory stress injection to evaluate the resilience of your application.

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