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Getting Started for Nimbus Web Integration


This guide outlines the high level steps and considerations for integrating Nimbus (Cirrus) into your web application. More detailed steps are available in the checklist

Integration Steps

To integrate Nimbus (Cirrus) with your web application, these are high-level steps, you can find more detailed version in the checklist:

  1. Glean
  • Integrate Glean on your web application.
  1. FML
  1. Probe Scraper
  1. Cirrus Container Image
  1. Deploy Cirrus Container
  • Deploy Cirrus container as a sidecar container in your Kubernetes deployment and add the environment variables.

  • Sidecar pattern in Kubernetes

    Sidecar pattern in Kubernetes
  • Example of Deployment architecture

    Example of Deployment architecture
  1. Configure Feature Manifest Language (FML)
  • Add feature in Feature Manifest Language (FML).
  1. Integrate Glean SDK
  • Identify key metrics and configure with your application.
  1. Call Cirrus Container
  • Pass a unique client id and context when calling the container to receive the features. The client id can be a temporary or stable id depending on your use case. Refer to API docs for more details.
    "client_id": "4a1d71ab-29a2-4c5f-9e1d-9d9df2e6e449",
    "context": {
    "key1": "value1",
    "key2": {
    "key2.1": "value2",
    "key2.2": "value3"
  1. Validation and Testing
  • Validate setup and test the integration thoroughly.
  1. Experiment Analysis
  • Add application support on Jetstream/OpMon and Metric hub.
  1. Additional Considerations
  • Provide training resources for experiment owners and reviewers.

Additional Notes

For any questions or assistance, reach out to the Nimbus team on Slack channel #ask-experimenter.