Managing Secrets in Grafana Cloud k6: A Q&A Guide to Secure Performance Testing

Performance testing often requires sensitive data like API keys, tokens, or credentials to mimic real user behavior. However, as test suites grow, these secrets can spread across scripts and version control, increasing the risk of exposure and maintenance headaches. Grafana Cloud k6 now offers built-in secrets management to securely store and inject confidential values at test runtime. This Q&A covers everything you need to know, from creating secrets to using them in your load tests.

What is secrets management for Grafana Cloud k6, and why do I need it?

Secrets management is a feature that lets you store sensitive values such as API tokens, passwords, or certificates centrally in Grafana Cloud and inject them into your load tests at runtime. Instead of hardcoding these values into your test scripts or passing them manually, you define them once in the Grafana Cloud UI. The secrets are then retrieved securely during test execution using the k6/secrets module. This approach eliminates the risk of accidental exposure through version control, screenshots, or shared files. It also simplifies maintenance: when a credential expires, you update it in one place, and all tests that reference it automatically use the new value. For teams running performance tests at scale, secrets management is essential for keeping scripts clean, reusable, and secure.

How do I create and manage secrets from the Grafana Cloud UI?

To manage secrets, navigate to Testing & synthetics > Performance > Settings in the Grafana Cloud web UI, then open the Secrets tab. Here you can perform all lifecycle operations:

• Create: Provide a name (used to reference the secret in tests), an optional description, and the secret value. Once saved, the secret is immediately available to your test scripts.
• Edit: Modify the description, labels, or value. When editing the value, you must enter a new value; the current value is never revealed. This makes it easy to rotate credentials without exposing the old one.
• Delete: Remove secrets that are no longer needed.

Labels help you organize secrets by project, environment, or purpose. A key design principle: secret values are write-only after creation — they cannot be read back or displayed in the UI. This prevents accidental leaks during screen sharing or casual browsing and aligns with security best practices.

How do I use a secret in a Grafana Cloud k6 test script?

Using a secret in your test script is straightforward. First, import the k6/secrets module. Then call the secrets.get() method with the name of the secret you created. This method returns a promise, so you need to use await in an async function. Here’s a minimal 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/data', { headers });
}

The secret value is injected at runtime, so your script never contains hardcoded tokens. You can use secrets in conjunction with thresholds, checks, and other k6 features. Remember that secrets.get() works only in Grafana Cloud k6, not in local k6 OSS runs.

How does secrets management improve security compared to hardcoding?

Hardcoding secrets in test scripts or configuration files poses several risks:

• Secrets can be accidentally committed to version control and exposed to unauthorized viewers.
• Sharing scripts via email or Slack can leak credentials.
• Rotating secrets requires editing every script, increasing the chance of missing one.

With Grafana Cloud k6 secrets management, secrets are stored centrally and never appear in your code. They are injected only during execution, and the UI enforces a write-only policy — values cannot be read back after creation. This eliminates the main vectors for exposure. Additionally, because secrets are managed in one place, rotation is trivial: update the secret once, and all tests automatically use the new value. This reduces the risk of using expired credentials and cuts down on maintenance overhead.

Can I reuse the same secret across multiple tests and environments?

Yes, that’s one of the key benefits. Each secret is stored with a unique name, and any test script within the same Grafana Cloud stack can reference it by that name. For example, if you have an API token for production and another for staging, you can create two secrets (e.g., api-token-prod and api-token-staging) and then switch between them in different test files or even within the same test using conditional logic. Labels further help separate secrets by environment. This design allows teams to maintain a single source of truth for credentials and ensures that tests are both secure and adaptable to different deployment contexts. When you need to point a test to a different environment, you only change the secret value — or the reference — without touching the script logic.

What happens if a secret value changes — will my tests break?

No, they will not break — in fact, secrets management makes credential rotation seamless. When you edit a secret in the Grafana Cloud UI and provide a new value, the change takes effect immediately. The next time you run a test that references that secret, Grafana Cloud k6 injects the updated value at runtime. There’s no need to modify your test scripts or restart any services. This is especially valuable for scheduled or continuous load tests: if a service rotates its API key, you can update the secret and the very next execution will use the new key. The only caveat is that if your test expects the secret to have a specific format (e.g., a JWT token vs a plain string), you must ensure the new value matches that expectation. Otherwise, the secret retrieval itself will succeed, but your application logic might fail.