Custom Script Action
What is a Custom Script Action?
A Custom Script Action allows you to execute custom scripts or commands during chaos experiment execution. This provides powerful flexibility to:
Run custom validation logic beyond standard probes
Perform setup or cleanup operations specific to your environment
Execute application-specific commands or API calls
Integrate with external systems, tools, or monitoring platforms
Implement complex business logic validation
Perform data collection or analysis during experiments
When to Use Custom Script Actions
Custom Script Actions are particularly valuable in the following scenarios:
Custom Validation
Business Logic Validation: Verify application-specific business rules
Data Integrity Checks: Validate data consistency across systems
Performance Metrics: Collect custom performance measurements
Complex Assertions: Implement validation logic that goes beyond simple HTTP checks
System Integration
External API Calls: Interact with external services or APIs
Database Operations: Perform database queries or validations
File System Operations: Check file system state or perform file operations
Network Diagnostics: Run custom network connectivity tests
Environment Setup/Cleanup
Pre-experiment Setup: Prepare the environment before chaos injection
Post-experiment Cleanup: Clean up resources after experiment completion
State Preparation: Set up specific system states required for the experiment
Resource Management: Manage test data or temporary resources
Monitoring and Alerting
Custom Metrics Collection: Gather application-specific metrics
Alert Validation: Verify that alerts are triggered correctly
Log Analysis: Parse and analyze application logs
Dashboard Updates: Update custom dashboards or reporting systems
How to configure a Custom Script Action
Step 1: Create a New Action
Navigate to your Probes & Actions and go to the Actions tab
Click New Action and select Custom Script from the dropdown.
delay action
Step 2: Configure Script Parameters
Configure the following parameters for your custom script action:
Action Name: Provide a descriptive name for the custom script action
Infrastructure Type: Select the target infrastructure (e.g., Kubernetes)
configure custom script action
Step 3: Configure Action Properties
In the Action Properties section, configure the script details:
Command: Enter the command or script to execute (e.g.,
/bin/sh)Arguments: Add command arguments or script parameters
You can add multiple arguments by clicking the Add button
Each argument can be edited or removed using the edit/delete icons
Environment Variables: Define environment variables needed by the script
Click Add to add new environment variables
Set key-value pairs for variables your script requires
custom script action properties
Step 4: Position the Action
Place the custom script action at the appropriate point in your experiment workflow:
Pre-experiment: Setup or validation before chaos injection
Mid-experiment: Validation or data collection during chaos
Post-experiment: Cleanup or final validation after chaos
Between Phases: Transition logic between different experiment phases
Next Steps
Explore experiment timeline view (see Experiments documentation)
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