Make Your Logs Work for You

The days of logging in to servers and manually viewing log files are over. SolarWinds® Papertrail™ aggregates logs from applications, devices, and platforms to a central location.

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Troubleshoot Fast and Enjoy It

SolarWinds® Papertrail™ provides cloud-based log management that seamlessly aggregates logs from applications, servers, network devices, services, platforms, and much more.

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Aggregate and Search Any Log

SolarWinds® Papertrail™ provides lightning-fast search, live tail, flexible system groups, team-wide access, and integration with popular communications platforms like PagerDuty and Slack to help you quickly track down customer problems, debug app requests, or troubleshoot slow database queries.

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Collect Logs: Hosting Services > Fastly


Fastly is a content delivery network (CDN) that caches HTTP content to improve the experience for those using your site or service. Fastly generates log messages for HTTP requests it receives and can send them in realtime to a Papertrail remote syslog destination.

The result is realtime tail, search, and alerts on Fastly traffic. When logs from related systems and apps are also being transmitted to Papertrail, this provides a complete view of logged activity in one place. If you aren’t familiar with Papertrail, start with a look at the event viewer.


  1. A Fastly account. Sign up and read Fastly’s remote log streaming tutorial.
  2. A free Papertrail account.


Create a log destination

To create a log destination that collects all Fastly logs under a single sender:

  1. Navigate to Log Destinations and click on Alternatives.
  2. Click My system’s hostname changes.
  3. Fill in What should we call it? on the right (for example, Fastly).
  4. Click Save.

Configure Fastly

  1. Log in to the Fastly web interface and click Configure.
  2. From the service menu, select the appropriate service.
  1. Click Edit Configuration and select Clone active. The service version page appears.
  2. Click the Logging tab. The Logging page appears.
  1. Click the Papertrail logo. The Create a new Papertrail endpoint page appears.
  1. In the Description field, enter the name of the endpoint (for example, Papertrail).
  2. In the Address field, enter the hostname and port number from the Papertrail log destination created in Step 1. For example, if the Papertrail log destination had the address, here’s how the resulting Fastly configuration would look:

Filtering logs

Often 99% or more of log messages from Fastly are successful requests for static assets like images and CSS files. In many cases, these HTTP 2xx and 3xx requests provide little operational value and are worth dropping. On the other hand, requests with HTTP 4xx and 5xx statuses are often very useful.

This filter regular expression can drop logs about requests for static assets, so that log data transfer is not consumed:

GET /.*?\.(css|png|jpg|gif|woff|ico|svg|js)|(GET|POST|HEAD) /.*? (1..|2..|3..|bingbot|Googlebot)

To apply it, visit Log Destinations, click Settings on the Fastly destination, click Add log filter, and paste the filter expression.

Advanced log formatting

Fastly uses format strings to format the log message. The original version 1 log format only provided format string variables for a few items, requiring an X-Log-Message header for anything else.

However, the newer version 2 log format is much more powerful, making the X-Log-Message workaround obsolete. Here’s an example that logs several response headers, among other details:

for=request method=%m path=%U%q fwd=%h status=%>s bytes=%B cache=%{X-Cache}o cache_hits=%{X-Cache-Hits}o timing=%{X-Timer}o

Legacy logging objects can be automatically upgraded during the cloning/editing process.

The scripts are not supported under any SolarWinds support program or service. The scripts are provided AS IS without warranty of any kind. SolarWinds further disclaims all warranties including, without limitation, any implied warranties of merchantability or of fitness for a particular purpose. The risk arising out of the use or performance of the scripts and documentation stays with you. In no event shall SolarWinds or anyone else involved in the creation, production, or delivery of the scripts be liable for any damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or other pecuniary loss) arising out of the use of or inability to use the scripts or documentation.