OpenTelemetry MySQL Instrumentation for Node.js

[![NPM Published Version][npm-img]][npm-url]
[![Apache License][license-image]][license-image]

This module provides automatic instrumentation for the mysql 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 https://www.npmjs.com/package/@opentelemetry/sdk-node" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">@opentelemetry/sdk-node for the most seamless instrumentation experience.

Compatible with OpenTelemetry JS API and SDK 1.0+.

Installation

``bash
npm install --save @opentelemetry/instrumentation-mysql
`

Supported Versions

- mysql versions >=2.0.0 <3

Usage

OpenTelemetry MySQL Instrumentation allows the user to automatically collect trace data and export them to the backend of choice, to give observability to distributed systems when working with mysql.

To load a specific plugin (MySQL in this case), specify it in the registerInstrumentations's configuration

`js
const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
const { MySQLInstrumentation } = require('@opentelemetry/instrumentation-mysql');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');

const provider = new NodeTracerProvider();
provider.register();

registerInstrumentations({
instrumentations: [
new MySQLInstrumentation(),
],
})
`

See examples/mysql for a short example.

$3

| Options | Type | Default | Description |
| ------------------------------------------------- | --------- | ------- | ----------- |
| enhancedDatabaseReporting | boolean | false | If true, a db.mysql.values attribute containing the query's parameters will be add to database spans. Note that this is not an attribute defined in Semantic Conventions. |

Semantic Conventions

This instrumentation implements Semantic Conventions (semconv) v1.7.0. Since then, networking (in semconv v1.23.1) and database (in semconv v1.33.0) semantic conventions were stabilized. As of @opentelemetry/instrumentation-mysql@0.55.0 support has been added for migrating to the stable semantic conventions using the OTEL_SEMCONV_STABILITY_OPT_IN environment variable as follows:

1. Upgrade to the latest version of this instrumentation package.
2. Set OTEL_SEMCONV_STABILITY_OPT_IN=http/dup,database/dup to emit both old and stable semantic conventions. (The http token is used to control the net. attributes, the database token to control to db. attributes.)
3. Modify alerts, dashboards, metrics, and other processes in your Observability system to use the stable semantic conventions.
4. Set OTEL_SEMCONV_STABILITY_OPT_IN=http,database to emit only the stable semantic conventions.

By default, if OTEL_SEMCONV_STABILITY_OPT_IN includes neither of the above tokens, the old v1.7.0 semconv is used.
The intent is to provide an approximate 6 month time window for users of this instrumentation to migrate to the new database and networking semconv, after which a new minor version will use the new semconv by default and drop support for the old semconv.
See the HTTP migration guide and the database migration guide for details.

Attributes collected:

| Old semconv | Stable semconv | Description |
| ---------------------- | ---------------- | ----------- |
| db.system | db.system.name | 'mssql' (old), 'microsoft.sql_server' (stable) |
| db.connection_string | Removed | The connection string used to connect to the database. |
| db.statement | db.query.text | The database query being executed. |
| db.user | Removed | Username for accessing the database. |
| db.name | Removed | Integrated into new db.namespace. |
| (not included) | db.namespace | The database associated with the connection, as provided at connection time. (This does not track changes made via SELECT DATABASE().) |
| net.peer.name | server.address | Remote hostname or similar. |
| net.peer.port | server.port | Remote port number. |

Metrics collected:

- db.client.connections.usage - The number of connections currently in a given state.

Note: While db.client.connections.usage has been deprecated in favor of db.client.connection.count in the semconv database migration, the new metric is still unstable, so cannot be enabled via OTEL_SEMCONV_STABILITY_OPT_IN=database`. There is ongoing work to provide an opt-in setting to select the latest experimental semconv.

Useful links

- For more information on OpenTelemetry, visit:
- For more about OpenTelemetry JavaScript:
- For help or feedback on this project, join us in [GitHub Discussions][discussions-url]

License

Apache 2.0 - See [LICENSE][license-url] for more information.

[discussions-url]: https://github.com/open-telemetry/opentelemetry-js/discussions
[license-url]: https://github.com/open-telemetry/opentelemetry-js-contrib/blob/main/LICENSE
[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat
[npm-url]: https://www.npmjs.com/package/@opentelemetry/instrumentation-mysql
[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Finstrumentation-mysql.svg