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https://github.com/xsam/otelsql
OpenTelemetry instrumentation for database/sql
https://github.com/xsam/otelsql
golang instrumentation opentelemetry sql
Last synced: 8 days ago
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OpenTelemetry instrumentation for database/sql
- Host: GitHub
- URL: https://github.com/xsam/otelsql
- Owner: XSAM
- License: apache-2.0
- Created: 2021-03-22T14:54:57.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2024-04-12T17:52:34.000Z (6 months ago)
- Last Synced: 2024-04-13T00:49:59.568Z (6 months ago)
- Topics: golang, instrumentation, opentelemetry, sql
- Language: Go
- Homepage:
- Size: 452 KB
- Stars: 242
- Watchers: 4
- Forks: 46
- Open Issues: 6
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
- Codeowners: CODEOWNERS
Awesome Lists containing this project
README
# otelsql
[](https://github.com/XSAM/otelsql/actions/workflows/ci.yaml)
[](https://codecov.io/gh/XSAM/otelsql)
[](https://goreportcard.com/report/github.com/XSAM/otelsql)
[](https://pkg.go.dev/mod/github.com/XSAM/otelsql)
It is an OpenTelemetry instrumentation for Golang `database/sql`, a port from https://github.com/open-telemetry/opentelemetry-go-contrib/pull/505.
It instruments traces and metrics.
## Install
```bash
$ go get github.com/XSAM/otelsql
```
## Usage
This project provides four different ways to instrument `database/sql`:
`otelsql.Open`, `otelsql.OpenDB`, `otesql.Register` and `otelsql.WrapDriver`.
And then use `otelsql.RegisterDBStatsMetrics` to instrument `sql.DBStats` with metrics.
```go
db, err := otelsql.Open("mysql", mysqlDSN, otelsql.WithAttributes(
semconv.DBSystemMySQL,
))
if err != nil {
panic(err)
}
defer db.Close()
err = otelsql.RegisterDBStatsMetrics(db, otelsql.WithAttributes(
semconv.DBSystemMySQL,
))
if err != nil {
panic(err)
}
```
Check [Option](https://pkg.go.dev/github.com/XSAM/otelsql#Option) for more features like adding context propagation to SQL queries when enabling [`WithSQLCommenter`](https://pkg.go.dev/github.com/XSAM/otelsql#WithSQLCommenter).
See [godoc](https://pkg.go.dev/mod/github.com/XSAM/otelsql) for details.
## Blog
[Getting started with otelsql, the OpenTelemetry instrumentation for Go SQL](https://opentelemetry.io/blog/2024/getting-started-with-otelsql), is a blog post that explains how to use otelsql in miutes.
## Examples
This project provides two docker-compose examples to show how to use it.
- [The stdout example](example/stdout) is a simple example to show how to use it with a MySQL database. It prints the trace data to stdout and serves metrics data via prometheus client.
- [The otel-collector example](example/otel-collector) is a more complex example to show how to use it with a MySQL database and an OpenTelemetry Collector. It sends the trace data and metrics data to an OpenTelemetry Collector. Then, it shows data visually on Jaeger and Prometheus servers.
## Trace Instruments
It creates spans on corresponding [methods](https://pkg.go.dev/github.com/XSAM/otelsql#Method).
Use [`SpanOptions`](https://pkg.go.dev/github.com/XSAM/otelsql#SpanOptions) to adjust creation of spans.
## Metric Instruments
| Name | Description | Units | Instrument Type | Value Type | Attribute Key(s) | Attribute Values |
| -------------------------------------------- | ---------------------------------------------------------------- | ----- | -------------------- | ---------- | ---------------- | ---------------------------------- |
| db.sql.latency | The latency of calls in milliseconds | ms | Histogram | float64 | status | ok, error |
| | | | | | method | method name, like `sql.conn.query` |
| db.sql.connection.max_open | Maximum number of open connections to the database | | Asynchronous Gauge | int64 | | |
| db.sql.connection.open | The number of established connections both in use and idle | | Asynchronous Gauge | int64 | status | idle, inuse |
| db.sql.connection.wait | The total number of connections waited for | | Asynchronous Counter | int64 | | |
| db.sql.connection.wait_duration | The total time blocked waiting for a new connection | ms | Asynchronous Counter | float64 | | |
| db.sql.connection.closed_max_idle | The total number of connections closed due to SetMaxIdleConns | | Asynchronous Counter | int64 | | |
| db.sql.connection.closed_max_idle_time | The total number of connections closed due to SetConnMaxIdleTime | | Asynchronous Counter | int64 | | |
| db.sql.connection.closed_max_lifetime | The total number of connections closed due to SetConnMaxLifetime | | Asynchronous Counter | int64 | | |
## Compatibility
This project is tested on the following systems.
| OS | Go Version | Architecture |
| ------- | ---------- | ------------ |
| Ubuntu | 1.23 | amd64 |
| Ubuntu | 1.22 | amd64 |
| Ubuntu | 1.23 | 386 |
| Ubuntu | 1.22 | 386 |
| MacOS | 1.23 | amd64 |
| MacOS | 1.22 | amd64 |
| Windows | 1.23 | amd64 |
| Windows | 1.22 | amd64 |
| Windows | 1.23 | 386 |
| Windows | 1.22 | 386 |
While this project should work for other systems, no compatibility guarantees
are made for those systems currently.
The project follows the [Release Policy](https://golang.org/doc/devel/release#policy) to support major Go releases.
## Why port this?
Based on [this comment](https://github.com/open-telemetry/opentelemetry-go-contrib/pull/505#issuecomment-800452510), OpenTelemetry SIG team like to see broader usage and community consensus on an approach before they commit to the level of support that would be required of a package in contrib. But it is painful for users without a stable version, and they have to use replacement in `go.mod` to use this instrumentation.
Therefore, I host this module independently for convenience and make improvements based on users' feedback.
## Communication
I use GitHub discussions/issues for most communications. Feel free to contact me on CNCF slack.