open-telemetry
OpenTelemetry ioredis Instrumentation for Node.js
This module provides automatic instrumentation for the ioredis module, which may be loaded using the @opentelemetry/sdk-trace-node package and is included in the @opentelemetry/auto-instrumentations-node bundle.
If total installation size is not constrained, it is recommended to use the @opentelemetry/auto-instrumentations-node bundle with @opentelemetry/sdk-node for the most seamless instrumentation experience.
Compatible with OpenTelemetry JS API and SDK 1.0+.
Installation
npm install --save @opentelemetry/instrumentation-ioredisSupported Versions
ioredisversions>=2.0.0 <6
Usage
To load a specific instrumentation (ioredis in this case), specify it in the registerInstrumentations's configuration
const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
const {
IORedisInstrumentation,
} = require('@opentelemetry/instrumentation-ioredis');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');
const provider = new NodeTracerProvider();
provider.register();
registerInstrumentations({
instrumentations: [
new IORedisInstrumentation({
// see under for available configuration
}),
],
});IORedis Instrumentation Options
IORedis instrumentation has few options available to choose from. You can set the following:
| Options | Type | Description |
|---|---|---|
dbStatementSerializer |
DbStatementSerializer |
IORedis instrumentation will serialize db.statement using the specified function. |
requestHook |
RedisRequestCustomAttributeFunction (function) |
Function for adding custom attributes on db request. Receives params: span, { moduleVersion, cmdName, cmdArgs } |
responseHook |
RedisResponseCustomAttributeFunction (function) |
Function for adding custom attributes on db response |
requireParentSpan |
boolean |
Require parent to create ioredis span, default when unset is true |
Custom db.statement Serializer
The instrumentation serializes the command into a Span attribute called db.statement. The standard serialization format attempts to be as informative
as possible while avoiding the export of potentially sensitive data. The number of serialized arguments depends on the specific command, see the configuration
list in @opentelemetry/redis-common.
It is also possible to define a custom serialization function. The function will receive the command name and arguments and must return a string.
Here is a simple example to serialize the command name skipping arguments:
const { IORedisInstrumentation } = require('@opentelemetry/instrumentation-ioredis');
const ioredisInstrumentation = new IORedisInstrumentation({
dbStatementSerializer: function (cmdName, cmdArgs) {
return cmdName;
},
});Using requestHook
Instrumentation user can configure a custom "hook" function which will be called on every request with the relevant span and request information. User can then set custom attributes on the span or run any instrumentation-extension logic per request.
Here is a simple example that adds a span attribute of ioredis instrumented version on each request:
const { IORedisInstrumentation } = require('@opentelemetry/instrumentation-ioredis');
const ioredisInstrumentation = new IORedisInstrumentation({
requestHook: function (
span: Span,
requestInfo: IORedisRequestHookInformation
) {
if (requestInfo.moduleVersion) {
span.setAttribute(
'instrumented_library.version',
requestInfo.moduleVersion
);
}
}
});
Semantic Conventions
This package uses @opentelemetry/semantic-conventions version 1.22+, which implements Semantic Convention Version 1.7.0
Attributes collected:
| Attribute | Short Description |
|---|---|
db.connection_string |
The connection string used to connect to the database. |
db.statement |
The database statement being executed. |
db.system |
An identifier for the database management system (DBMS) product being used. |
net.peer.name |
Remote hostname or similar. |
net.peer.port |
Remote port number. |
Useful links
- For more information on OpenTelemetry, visit: https://opentelemetry.io/
- For more about OpenTelemetry JavaScript: https://github.com/open-telemetry/opentelemetry-js
- For help or feedback on this project, join us in GitHub Discussions
License
Apache 2.0 - See LICENSE for more information.