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Monitor a Cloud deployment with build logs, Agent Server logs, and runtime metrics. Use logs to investigate a specific revision and metrics to track deployment performance over time.

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View deployment logs

Each revision includes build logs and server logs.
From the Deployments view:
  1. Select a deployment.
  2. In the Revisions table, select a revision. The details panel opens with the Build tab selected.
  3. Review the build logs.
  4. Select the Server tab to view server logs. Server logs become available after LangSmith deploys the revision.
  5. Adjust the date and time range as needed. The default range is Last 7 days.

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Forward server logs to Datadog

To forward Agent Server logs to Datadog, configure these environment variables or secrets on the deployment:
  • DD_API_KEY: Your Datadog API key.
  • DD_LOGS_ENABLED=true: Enables log forwarding.
To correlate logs with traces, also set DD_LOGS_INJECTION=true. For all supported Datadog variables, see Supported Datadog environment variables.

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View deployment metrics

To view deployment metrics:
  1. From the LangSmith UI, select Deployments.
  2. Select a deployment.
  3. Select the Monitoring tab. For metric definitions, see Control plane monitoring.
  4. Adjust the date and time range as needed. The default range is Last 15 minutes.

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See also

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