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Log streaming: Loggly

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Fastly's Real-Time Log Streaming feature can send log files to Loggly. Loggly is an agent-less log collection and management tool.

Prerequisites

If you don't already have a Loggly account, you'll need to register for one. Follow the signup instructions on the Loggly website.

Follow the steps below to find your Loggly customer token:

  1. Navigate to the Customer Tokens area in the Source Setup on your Loggly dashboard.

    Customer Tokens area in the Source Setup of the loggly dashboard

  2. Make note of your Loggly customer token. Loggly uses this to associate data you send them with your account.

Adding Loggly as a logging endpoint

After you've created a Loggly account and obtained your customer token, follow these instructions to add Loggly as a logging endpoint for Fastly services:

  1. Review the information in our Setting Up Remote Log Streaming guide.
  2. Click the Loggly Create endpoint button. The Create a Loggly endpoint page appears.
  3. Fill out the Create a Loggly endpoint fields as follows:
    • In the Name field, enter a human-readable name for the endpoint.
    • In the Placement area, select where the logging call should be placed in the generated VCL. Valid values are Format Version Default, waf_debug (waf_debug_log), and None. See our guide on changing log placement for more information.
    • In the Log format field, optionally enter an Apache-style string or VCL variables to use for log formatting. See the example format section for details.
    • In the Token field, enter your Loggly customer token.
  4. Click the Create button to create the new logging endpoint.
  5. Click the Activate button to deploy your configuration changes.

Example format

The following is an example format string for sending data to Loggly. Our discussion of format strings provides more information.

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{
  "timestamp": "%{strftime(\{"%Y-%m-%dT%H:%M:%S%z"\}, time.start)}V",
  "client_ip": "%{req.http.Fastly-Client-IP}V",
  "geo_country": "%{client.geo.country_name}V",
  "geo_city": "%{client.geo.city}V",
  "host": "%{if(req.http.Fastly-Orig-Host, req.http.Fastly-Orig-Host, req.http.Host)}V",
  "url": "%{json.escape(req.url)}V",
  "request_method": "%{json.escape(req.method)}V",
  "request_protocol": "%{json.escape(req.proto)}V",
  "request_referer": "%{json.escape(req.http.referer)}V",
  "request_user_agent": "%{json.escape(req.http.User-Agent)}V",
  "response_state": "%{json.escape(fastly_info.state)}V",
  "response_status": %{resp.status}V,
  "response_reason": %{if(resp.response, "%22"+json.escape(resp.response)+"%22", "null")}V,
  "response_body_size": %{resp.body_bytes_written}V,
  "fastly_server": "%{json.escape(server.identity)}V",
  "fastly_is_edge": %{if(fastly.ff.visits_this_service == 0, "true", "false")}V
}

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