SumoLogic
Sumo Logic OpenTelemetry RUM
The Sumo Logic OpenTelemetry auto-instrumentation for JavaScript library enables tracing in the browser.
Features
- XMLHttpRequest and Fetch APIs auto-instrumentation
- user interactions like click, submit, drop etc.
- document load with fetched resources
- History API and hash change support
- web-vitals
- session id
- longtasks with automatic context attaching
- uncaught exceptions, unhandled rejections, document errors and console errors
- support for manual instrumentation
- automatic context carrying through timers, promises, native async-await, events, observers and more
- 103 KB (31 KB gzipped)
Installation
The easiest way to start collecting traces from your website is to put the code below inside the <head></head> tags on
your website:
<script
src="https://rum.sumologic.com/sumologic-rum.js"
type="text/javascript"
></script>
<script>
window.sumoLogicOpenTelemetryRum &&
window.sumoLogicOpenTelemetryRum.initialize({
collectionSourceUrl: 'sumo_logic_traces_collector_source_url',
serviceName: 'name_of_your_web_service',
propagateTraceHeaderCorsUrls: [
'list_of_domains_to_receive_trace_context',
],
collectErrors: true,
});
</script>See configuration for all supported options.
There are no other required actions needed to take. With properly provided collectionSourceUrl and serviceName your
website is ready and will send collected traces to the specified Sumo Logic collector.
You can load the script asynchronously using the script below, but some functionalities like user interactions or requests made before script run will be limited.
<script>
(function (w, s, d, r, e, n) {
(w[s] = w[s] || {
readyListeners: [],
onReady: function (e) {
w[s].readyListeners.push(e);
},
}),
((e = d.createElement('script')).async = 1),
(e.src = r),
(n = d.getElementsByTagName('script')[0]).parentNode.insertBefore(e, n);
})(
window,
'sumoLogicOpenTelemetryRum',
document,
'https://rum.sumologic.com/sumologic-rum.js',
);
window.sumoLogicOpenTelemetryRum.onReady(function () {
window.sumoLogicOpenTelemetryRum.initialize({
collectionSourceUrl: 'sumo_logic_traces_collector_source_url',
serviceName: 'name_of_your_web_service',
propagateTraceHeaderCorsUrls: [
'list_of_domains_to_receive_trace_context',
],
collectErrors: true,
});
});
</script>Note: XHR and navigation/route changes support as well as errors collection requires RUM script in version 4 or higher (https://rum.sumologic.com/sumologic-rum-v4.js). Please ensure you are using the correct version in your pages. For automatic updates use https://rum.sumologic.com/sumologic-rum.js.
Note: Above examples omit the version of the script in the src attribute and automatically uses most up to date
version of it. If you want to manually control versioning of the script please use:
- https://rum.sumologic.com/sumologic-rum-vX.js (e.g. https://rum.sumologic.com/sumologic-rum-v4.js) for major version control (no breaking changes),
- https://rum.sumologic.com/sumologic-rum-vX.Y.js (e.g. https://rum.sumologic.com/sumologic-rum-v4.0.js) for major version control (only bugfixes are automatically included),
- https://rum.sumologic.com/sumologic-rum-vX.Y.Z.js (e.g. https://rum.sumologic.com/sumologic-rum-v4.0.0.js) for major version control (strict version control).
Manual installation
The other option is to bundle this library inside your project and initialize it.
Inside your project directory execute npm install @sumologic/opentelemetry-rum.
RUM needs to be initialized preferably before other functionalities in your code:
import { initialize } from '@sumologic/opentelemetry-rum';
initialize({
collectionSourceUrl: 'sumo_logic_traces_collector_source_url',
serviceName: 'name_of_your_web_service',
propagateTraceHeaderCorsUrls: ['list_of_domains_to_receive_trace_context'],
});Configuration
Both script tag and manual installation can be configured with following parameters:
| Parameter | Type | Default | Description |
|---|---|---|---|
| collectionSourceUrl | string |
required | Sumo Logic collector source url |
| authorizationToken | string |
| Sumo Logic collector authorization token | |
| serviceName | string |
"unknown" |
Name of your web service |
| applicationName | string |
| Name of your application | |
| deploymentEnvironment | string |
| The software deployment (e.g. staging, production) |
|
| defaultAttributes | object |
{} |
Attributes added to each span |
| samplingProbability | number |
1 |
1 means all traces are sent, 0 - no traces are send, 0.5 - there is 50% change for a trace to be sent |
| bufferMaxSpans | number |
2048 |
Maximum number of spans waiting to be send |
| maxExportBatchSize | number |
50 |
Maximum number of spans in one request |
| bufferTimeout | number |
2000ms |
Time in milliseconds for spans waiting to be send |
| ignoreUrls | (string|RegExp)[] |
[] |
List of XHR URLs to ignore (e.g. analytics) |
| propagateTraceHeaderCorsUrls | (string|RegExp)[] |
[] |
List of URLs where W3C Trace Context HTTP header will be injected |
| collectSessionId | boolean |
true |
Enables collecting rum.session_id attribute |
| dropSingleUserInteractionTraces | boolean |
true |
Automatically drops traces with only one span coming from the user-interaction instrumentation (click etc.) |
| collectErrors | boolean |
true |
Automatically collect and send uncaught exceptions, unhandled rejections, document errors and console errors |
| userInteractionElementNameLimit | number |
20 |
Limit for user interaction element name, after which the name will be truncated with ... suffix. |
| getOverriddenServiceName | (span: Span) => string |
| Function used for overridding the service name of a span during its creation. |
Trace context propagation
By default, trace context propagation, allowing creation of end to and front end to backend traces for cross-origin
requests is not enabled because of browser CORS security restrictions. To propagate tracing context to create front-end
to back-end traces, set exact URLs or URL patterns in the propagateTraceHeaderCorsUrls configuration option. You must
configure your server to return accept and return following CORS headers in its response:
Access-Control-Allow-Headers: traceparent, tracestate. Read W3C Trace Context
for more details. Sumo Logic cannot perform any validation correct configuration of services of other origins, so,
please be careful when configuring this. You should always try enabling CORS in a test environment before setting it up
in production.
For example:
// propagates trace context in requests made to https://api.sumologic.com or http://localhost:3000/api URLs
propagateTraceHeaderCorsUrls: [
/^https:\/\/api\.sumologic.com\/.*/,
/^http:\/\/localhost:3000\/api\/.*/,
],Baggage
Baggage is contextual information that’s passed between spans. It’s a key-value store that resides alongside span context in a trace, making values available to any span created within that trace.
Imagine you want to have a customerId attribute on every span in your trace, which involves multiple services;
however, customerId is only available in one specific service. To accomplish your goal, you can use OpenTelemetry
Baggage to propagate this value across your system. In that sense it is different than defaultAttributes, which does
not allow for data to be added dynamically. It could be said that setDefaultAttribute() serves similar function as
Baggage (as attributes can be defined dynamically); however it will not add attributes retroactively (spans sent before
calling setDefaultAttribute()).
OpenTelemetry uses Context Propagation to pass Baggage around, and each of the different library implementations has propagators that parse and make that Baggage available without you needing to explicitly implement it.
Baggage can be used by accessing methods in our window.sumoLogicOpenTelemetryRum pulled from OpenTelemetry upstream:
const baggage =
window.sumoLogicOpenTelemetryRum.api.propagation.getBaggage(
window.sumoLogicOpenTelemetryRum.api.context.active(),
) || window.sumoLogicOpenTelemetryRum.api.propagation.createBaggage();
baggage.setEntry('customerId', { value: 'customer-id-value' });
window.sumoLogicOpenTelemetryRum.api.propagation.setBaggage(
window.sumoLogicOpenTelemetryRum.api.context.active(),
baggage,
);Useful links:
- https://opentelemetry.io/docs/concepts/signals/baggage/
- https://scoutapm.com/blog/opentelemetry-in-javascript
Manual instrumentation
When initialized by the <script /> tag, window attribute sumoLogicOpenTelemetryRum is exposed. It gives possibility
to create spans manually. Global sumoLogicOpenTelemetryRum objects contains:
api- exposed @opentelemetry/api moduletracer- an instance of aTracerfrom @opentelemetry/tracingrecordError- a function to create an error with the given message and optional attributes.
Example:
const { tracer, api, recordError } = sumoLogicOpenTelemetryRum;
const span = tracer.startSpan('fetchUserData', {
attributes: { organization: 'client-a' },
});
api.context.with(api.trace.setSpan(api.context.active(), span), () => {
// long running operation
});
recordError('Cannot load data', { organization: 'test' });Using in production, make sure your website works when sumoLogicOpenTelemetryRum is not defined (e.g. blocked by a
browser extension).
Disable instrumentation
Instrumentation can be disabled and enabled again in runtime using registerInstrumentations()
and disableInstrumentations() methods.
sumoLogicOpenTelemetryRum.disableInstrumentations();
// some code with instrumentations disabled
sumoLogicOpenTelemetryRum.registerInstrumentations();Public API
All method are available under the window.sumoLogicOpenTelemetryRum object.
setDefaultAttribute(key, value)
Extends the list of default attributes specified during initialization.
Example: window.sumoLogicOpenTelemetryRum.setDefaultAttribute('user_id', userId)
getCurrentSessionId()
Returns current value of the rum.session_id attribute. Returned value may change in time, so don't cache it.
Example: window.sumoLogicOpenTelemetryRum.getCurrentSessionId()
recordError()
Sends an error with the given message and optional attributes.
Example: window.sumoLogicOpenTelemetryRum.recordError('Cannot load data', { organization: 'test' })
License
This project is released under the Apache 2.0 License.
Contributing
Please refer to our Contributing documentation to get started.
Code Of Conduct
Please refer to our Code of Conduct.