What is Sentry?

Basics

• Language-agnostic error tracker
• Semi-automatic grouping of incidents
• Filterable tags
• Ownership through assignment
• Resolve or snooze to mark issues as done
• Easy-to-implement protocol
• Extensive REST API

Third party service integrations

Hosting

• getsentry.com
  • Small plan starts at 29 USD/month
  • 9 USD/month for hobbyists
  • I'm not paid to mention that
• Self-hosted
  • 100% open source
  • Tricky to set up and scale
  • Working Docker image exists, but doesn't scale

Alternatives

Why we picked Sentry

• Provider-independent through open source
• Reasonable pricing
• Works really well
• Very active ongoing development
• Kickass tech support

Use it!

<script src="https://cdn.ravenjs.com/2.3.0/raven.min.js"></script>
<script>
    Raven.config('your DSN goes here').install();
</script>
                        

// Log an error manually.
try {
    thisFunctionDoesNotExist('really!');
} catch (e) {
    Raven.captureException(e);
}
                        

$ npm install raven --save

var raven = require('raven');
var client = new raven.Client('your DSN goes here');
                        

// Use Sentry as global error tracker.
client.patchGlobal();
                        

// Log an error manually.
try {
    thisFunctionDoesNotExist('really!');
} catch (e) {
    client.captureException(e);
}
                        

$ gem "sentry-raven"

require 'raven'

Raven.configure do |config|
  config.dsn = 'your DSN goes here'
end
                        

# Configure Rack to use it (optional; in config.ru).
use Raven::Rack
                        

# Log an exception manually.
begin
    1 / 0
rescue ZeroDivisionError => exception
    Raven.capture_exception(exception)
end
                        

$ composer require "raven/raven"
                        

// In the autoloader:
require_once '/path/to/Raven/library/Raven/Autoloader.php';
Raven_Autoloader::register();
                        

// In the application:
$client = new Raven_Client('your DSN goes here');
$error_handler = new Raven_ErrorHandler($client);
$error_handler->registerExceptionHandler();
$error_handler->registerErrorHandler();
$error_handler->registerShutdownFunction();
                        

// Log an exception manually.
try {
    throw new \Exception('Something went wrong');
} catch (\Exception $e) {
    $client->captureException($e);
}
                        

Demo time!

http://is.gd/sntry

Welcome to the real world

Example issue: IE8 incompatibility

Issue overview

Events over time

Pitfalls

Irrelevant errors - old browsers

Solution: Snooze forever

Irrelevant errors - exotic situations

Solution: Delete/snooze forever

Track only your stuff: Black-/Whitelists

Example:

Raven.config('your DSN goes here', {
  ignoreErrors: [/BoringError/],
  whitelistUrls: [/\/js\/my-thing\.js/]
}).install();
                        

Be mindful of privacy