Managing Sensitive Data in Load Tests: A Guide to Grafana Cloud k6 Secrets

Performance testing often requires API keys, tokens, or credentials to mimic real user interactions. However, as your testing portfolio expands, these secrets can proliferate across scripts and configuration files, increasing the risk of accidental exposure and complicating maintenance. Grafana Cloud k6 now offers a built-in secrets management feature to address this challenge. Secrets are stored centrally in Grafana Cloud, injected into tests at runtime, and never hardcoded or exposed in your version control system. Below, we answer common questions about using secrets in Grafana Cloud k6.

Why is secrets management important for performance testing?

Performance tests often need to authenticate with real systems, which means they rely on sensitive values like API tokens, database credentials, or encryption keys. Without a centralized management solution, these secrets tend to be hardcoded directly into test scripts, stored in environment variables, or passed manually between team members. This approach leads to three major problems: security risks (secrets can be exposed via code repositories, logs, or screenshots), maintenance overhead (every script must be updated when a credential changes), and inconsistent testing (different environments may use different secret values). Grafana Cloud k6 secrets management solves these by providing a single, secure repository for all sensitive data. Secrets are stored encrypted and are only injected into your test at runtime. This keeps your scripts clean, reduces the attack surface, and makes it easy to rotate credentials without touching your test code.

How do I create and manage secrets in Grafana Cloud k6?

Managing secrets is done entirely from the Grafana Cloud web UI. Navigate to Testing & Synthetics > Performance > Settings and open the Secrets tab. From there, you can perform all lifecycle operations. To create a secret, provide a unique name (which you’ll reference in your test), an optional description for clarity, and the actual sensitive value. You can also add labels to organize secrets by project, environment, or purpose. Once saved, the secret is immediately available for your tests. To edit a secret, you can update its description, labels, or value—but you will never see the current value; you simply overwrite it with a new one. To delete a secret that is no longer used, click the delete action. All changes are reflected in real time, so you can start using a new secret right away.

How are secrets protected from accidental exposure?

Security is a core design principle of the secrets management feature. After a secret value is initially saved, it becomes write-only in the Grafana Cloud UI. This means you can never view or read back the stored value through the interface. This prevents accidental exposure during screen sharing, screenshots, or casual inspection. Additionally, secrets are never stored in plain text within your test scripts or version control history. They are injected only at test runtime, directly from the secure Grafana Cloud backend. This approach aligns with industry best practices for handling sensitive data. If you need to verify which secret is being used, you can check the secret’s name and description, but the actual value remains hidden. For audit purposes, you can track changes to secrets (creation, modification, deletion) through Grafana Cloud’s audit logs.

How can I use secrets in my k6 test scripts?

Using secrets in your Grafana Cloud k6 tests is straightforward, thanks to the dedicated k6/secrets module. To get started, import the module into your script: import secrets from 'k6/secrets';. Then, use the secrets.get('secret-name') function to retrieve the value at runtime. This function returns a Promise, so you’ll typically use it inside an async function. For example:

import http from 'k6/http';
import secrets from 'k6/secrets';

export default async function () {
  const apiToken = await secrets.get('api-token');
  const headers = { Authorization: `Bearer ${apiToken}` };
  http.get('https://api.example.com/endpoint', { headers });
}

The secret value is never hardcoded; it is fetched securely when the test runs. You can access any secret by its name as defined in the Grafana Cloud UI. This approach also makes your scripts more portable, because you can change the underlying secret value without modifying the test code.

Can I reuse secrets across different test environments?

Yes, secrets are stored centrally under your Grafana Cloud stack, so any test run within that stack can access the same secrets. This makes it simple to reuse credentials across multiple test scenarios or environments (e.g., staging, QA, production) without duplicating sensitive data. For example, you could create a secret named db-password and reference it in all database-heavy tests. If you need different values for different environments, you can either create separate secrets with naming conventions like db-password-staging and db-password-production, or use labels and metadata to organize them. The flexibility allows you to maintain a single source of truth for credentials while still tailoring values per environment. Because secrets are injected at runtime, you can also switch between environment-specific versions simply by changing the secret name in your test script or configuration.

What happens if I need to rotate or update a secret?

Rotating secrets is a common security requirement. With Grafana Cloud k6 secrets management, updating a secret is simple and secure. Go to the Secrets tab in the settings, locate the secret you want to rotate, and click Edit. You will be prompted to enter a new value (the old value is never displayed). After saving, the new value is immediately used by all subsequent test runs that reference that secret name. There is no need to modify any test scripts or redeploy configurations. This streamlined rotation process ensures that even if a credential leaks, you can quickly replace it across your entire testing suite. It also reduces downtime and manual errors. Note that any currently running tests will complete with the old secret value; new executions will use the updated one. For audit purposes, you can review the change history in the Grafana Cloud audit logs.