Progressive rollout health checks

Overview

Use health checks for progressive rollouts to confirm your rollout setup and troubleshoot configuration problems. Progressive rollouts gradually increase traffic to a flag or AI Config variation over time. Health checks confirm that your rollout configuration is valid by verifying that your flag is turned on and receiving evaluations from the correct context kind.

Health check statuses

When you create a progressive rollout, LaunchDarkly provides a health check status below the Target by field. After you configure the Target by field, LaunchDarkly processes the rollout configuration and displays one of the following statuses:

• Healthy: Your flag or AI Config is turned on and receiving evaluations from the expected context kind.
• Health warnings: There is at least one problem with your rollout configuration.

Click the status to view your rollout’s health checks:

The individual health checks are explained below.

Flag evaluations

This health check verifies that the flag is turned on and receiving evaluations from the context kind you selected for the rollout.

The health check can display the following messages:

• Flag is turned on: The flag is active and serving variations.
• [context kind] contexts are evaluating your flag: The flag is receiving evaluations from the expected context kind.
• [context kind] contexts are not evaluating your flag: The flag is not receiving evaluations from the expected context kind. This can happen if the flag is turned off or if your SDK is not sending evaluations for that context kind.

You can expand the Evaluations graph at the top of the flag Targeting tab to view how many contexts are encountering the flag and which variation they are receiving.