About the Logs menu

The Logs menu contains a link to the Log tailing page, which gives you access to the Compute log tailing feature. This feature allows you to view custom log messages from your Compute application. Specifically, the Log Tailing feature streams your service's log output to the Fastly web interface so you can respond quickly when debugging your application without setting up a third-party logging tool.

Before you begin

Be sure you know how to access the web interface controls before learning about the details you'll encounter here.

About the Log tailing page

The Log tailing page live streams the log outputs for a compute service. Streamed outputs can include any output sent to the standard output stream (stdout) and the standard error stream (stderr), as well as any runtime errors encountered by the application. For each log, the Log tailing page displays the following information:

  • Date (UTC): a UTC timestamp of when the request occurred.
  • Request ID: a unique identifier applied to the request.
  • Event: the event type, either stdout or stderr.
  • Message: the message included in the request.

A series of controls on the Log tailing page allow you to interact with and refine the logs. Specifically:

  • the Service menu allows you to specify the Compute service that the logs are from. From the menu, you can search for a service by ID or name.
  • the Events menu allows you to limit the displayed logs to a specific stream (e.g., stdout and stderr).
  • the Pause button allows you to pause the live stream of Compute logs. Once paused, you can resume live stream by clicking Live.

Accessing the Log tailing page

To access the Log tailing page:

  1. Log in to the Fastly web interface.
  2. Go to Observability > Logs > Log tailing.

What's next

Dig deeper into details about all areas of the web interface controls before you move on to using them to work with services.
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