TLS certificate verification error when running k6exec container

[jwcastillo]

Description

When executing the k6exec container with the following command:

docker run --rm -i k6exec:latest -v run - < examples/combined.js

I encounter the following error:

time="2025-01-18T08:30:12Z" level=error msg="build error: Get \"https://registry.k6.io/catalog.json\": tls: failed to verify certificate: x509: certificate signed by unknown authority" app=k6exec

Steps to Reproduce

1. Pull the latest version of the k6exec Docker image.
2. Save an example script as examples/combined.js.
3. Run the following command:

docker run --rm -i k6exec:latest -v run - < examples/combined.js

4. Observe the TLS certificate verification error.

Expected Behavior

The command should execute successfully, connecting to https://registry.k6.io/catalog.json without TLS-related errors.

Actual Behavior

The command fails with a TLS certificate verification error:

tls: failed to verify certificate: x509: certificate signed by unknown authority

Additional Information

It seems the issue is related to the TLS certificate verification when accessing https://registry.k6.io/catalog.json. This might be caused by:

• A missing or untrusted Certificate Authority (CA).
• An outdated or improperly configured certificate in the k6exec container.
  Please provide guidance on resolving this issue or clarify if additional configuration is required.