Effortless Security: Managing Sensitive Data in Performance Tests with Grafana Cloud k6

The Challenge of Secrets in Performance Testing

Performance tests often need to interact with real systems, which means they require API keys, tokens, or credentials to simulate authentic user behavior. As your test suite expands, these sensitive values tend to spread across scripts, configuration files, and different environments, creating a security risk and making tests harder to maintain. Hardcoding secrets directly into test scripts is especially dangerous—they can easily leak into version control, be exposed in logs, or be mishandled during collaboration.

To solve this problem, Grafana Cloud k6—the fully managed performance testing platform built on k6 OSS—now includes a built-in secrets management feature. This allows you to store sensitive data securely and inject it into your load tests at runtime, without ever exposing the actual values in your code or configuration.

Managing Secrets in the Grafana Cloud UI

Secrets are created and managed directly from the Grafana Cloud web interface. To get started, navigate to Testing & Synthetics > Performance > Settings and open the Secrets tab. This central location gives you full control over the entire lifecycle of your secrets.

Creating Secrets

When you create a new secret, you provide three pieces of information:

• Name – A unique identifier that you will use to reference the secret in your test scripts.
• Value – The actual sensitive data, such as an API token or password.
• Description (optional) – A human-readable note explaining the secret’s purpose, useful for team collaboration.
• Labels (optional) – Tags that help you organize secrets by project, environment, or owner.

Once saved, the secret is immediately available for use in your tests. There is no additional deployment step—just create it and start referencing it.

Editing Secrets

Over time you may need to rotate credentials or update a secret’s metadata. Editing is straightforward, but with an important security consideration: the current value of a secret is never displayed in the UI. When you edit a secret, you simply enter a new value that overwrites the old one. This ensures that even users with edit permissions cannot accidentally view the sensitive data. You can also modify the description and labels without affecting the stored value.

Deleting Secrets

When a secret is no longer needed, you can delete it permanently from the interface. Be cautious—once deleted, any tests that still reference the secret will fail to retrieve its value at runtime.

Write-Only Design for Maximum Security

A key design principle of Grafana Cloud k6 secrets management is that secret values are write-only in the UI. After creation, they cannot be read back, displayed, or copied. This simple but effective measure prevents accidental exposure through screenshots, screen sharing, or casual inspection, aligning with industry best practices for secrets management.

Integrating Secrets into Your k6 Tests

Once your secrets are defined, using them in performance tests is remarkably simple. Grafana Cloud k6 provides a dedicated module called k6/secrets that you can import directly into your JavaScript test scripts.

Importing and Using the Secrets Module

To access a secret, import the module and call the get() method with the secret’s name. The method returns a promise, so you must use await inside 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/data', { headers });
  check(res, { 'status is 200': (r) => r.status === 200 });
}

Notice how the script remains clean—the API token is never hardcoded or visible in the code. The secret is injected at runtime by the Grafana Cloud k6 execution environment.

Benefits of This Approach

• No hardcoded secrets – Your scripts are safe to share and commit to version control.
• Centralized management – Update a secret’s value in one place, and all tests using it automatically get the new value.
• Environment portability – Use different secrets for different environments (dev, staging, production) by simply swapping the secret name or using labels.
• Audit trail – Because secrets are managed through Grafana Cloud, you can track changes and access through existing audit logs.

Conclusion

Secrets management for Grafana Cloud k6 eliminates one of the most common pain points in performance testing: the insecure handling of sensitive data. By storing secrets centrally and injecting them at runtime, you can keep your test scripts clean, reduce the risk of accidental exposure, and simplify maintenance across environments. Whether you are testing a REST API, a GraphQL endpoint, or any other service that requires authentication, this feature helps you focus on performance without compromising security.

To get started, explore the Secrets tab in the Grafana Cloud UI today, and refer to the official documentation for more advanced use cases like rotating secrets dynamically.