How to Securely Manage Secrets for Grafana Cloud k6 Load Tests

Introduction

Performance tests that simulate real user behavior often depend on API keys, tokens, and credentials. Without proper safeguards, these sensitive values can leak across scripts, configuration files, and environments — increasing security risks and making maintenance a nightmare. Grafana Cloud k6 now offers a dedicated secrets management feature that lets you store confidential data centrally and inject it into your tests at runtime. This keeps your test scripts clean, prevents accidental exposure in version control, and simplifies reuse across different environments. In this step-by-step guide, you’ll learn how to create, manage, and use secrets in your Grafana Cloud k6 load tests.

What You Need

• A Grafana Cloud account with access to the Testing & Synthetics area (specifically the Performance module).
• An existing k6 test script (or the ability to create one) that uses sensitive data such as API tokens, passwords, or credentials.
• Basic familiarity with JavaScript and the k6 scripting syntax.
• Appropriate permissions to create and manage secrets within your Grafana Cloud organization.

Step-by-Step Instructions

Step 1: Access the Secrets Management Interface

Log in to your Grafana Cloud account and navigate to Testing & Synthetics > Performance. In the left-hand menu, click on Settings. Then open the Secrets tab. This is the central hub where you’ll create, edit, and delete all your secrets.

Step 2: Create a New Secret

Click the Add secret button. A form will appear with the following fields:

• Name — A unique identifier for the secret (e.g., api-token). This is how you’ll reference the secret in your test scripts.
• Description — An optional note explaining the secret’s purpose (e.g., “Token for the production payment API”).
• Value — The actual sensitive data (e.g., sk_live_AbCdEf123456).
• Labels — Key-value pairs (e.g., environment:production) that help organize your secrets.

Once you fill in the details, click Save. The secret is immediately available for use in your load tests. Important: after saving, the value is write-only — you can never view it again through the UI. This prevents accidental exposure via screenshots or screen sharing.

Step 3: Edit or Delete Existing Secrets (Optional)

To update a secret, click the edit icon next to it. You’ll be able to modify the description, labels, and value. Note that you must provide a new value — the old one will be replaced and cannot be retrieved. To remove a secret entirely, click the delete icon and confirm the action. Use labels to keep your secrets organized; for example, you can filter by environment or application.

Step 4: Use Secrets in Your k6 Test Script

Grafana Cloud k6 provides a built-in module called k6/secrets to retrieve secret values at runtime. In your test script, import the module and use the secrets.get() function. Because secrets are injected asynchronously, you must run your main function as an async function. Here’s a minimal example:

import { check } from 'k6';
import http from 'k6/http';
import secrets from 'k6/secrets';

export default async function main() {
  const apiToken = await secrets.get('api-token');
  const headers = {
    'Authorization': `Bearer ${apiToken}`
  };
  let res = http.get('https://api.example.com/secure-endpoint', { headers });
  check(res, { 'status is 200': (r) => r.status === 200 });
}

Replace 'api-token' with the exact name you gave your secret in Step 2. When the test runs, Grafana Cloud k6 fetches the secret value from its centralized store and injects it into the script — without ever exposing the value in your code or logs.

Step 5: Run Your Test and Verify

Save your script and run it as you normally would in Grafana Cloud k6. Monitor the output to confirm the test uses the secret correctly. For example, check that the HTTP request receives a 200 status code (or whatever your API returns on success). If you encounter errors, double-check the secret name and ensure the value is accurate — you can overwrite it in the UI if needed.

Tips for Success

• Always use secrets instead of hardcoding sensitive values. This prevents accidental leaks in version control (e.g., Git) and reduces the risk of exposure when sharing scripts.
• Write meaningful descriptions and labels for each secret. This helps your team understand what each secret is for and avoids confusion as your project grows.
• Rotate credentials regularly by editing the secret’s value. Because secrets are write-only, the rotation process is simple and secure.
• Never log secret values in your test scripts. Avoid using console.log() on sensitive data. The k6/secrets module is designed to keep secrets out of logs, but you should still exercise caution.
• Test with a non-sensitive placeholder first to ensure your script logic works before introducing real credentials.
• Leverage labels for organization. For example, create labels like env:staging or app:payments to quickly find and manage secrets across many tests.
• Use different secrets for different environments (e.g., production vs. staging) to maintain separation and security.

By following these steps, you can securely integrate sensitive data into your performance tests while keeping your scripts clean and your organization safe. Secrets management in Grafana Cloud k6 simplifies credential handling at scale — start using it today to tighten your testing security.