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119 lines
3.7 KiB
Markdown
119 lines
3.7 KiB
Markdown
[](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql)
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# database/sql instrumentation for OpenTelemetry Go
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[database/sql OpenTelemetry instrumentation](https://uptrace.dev/opentelemetry/instrumentations/go-database-sql.html)
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records database queries (including `Tx` and `Stmt` queries) and reports `DBStats` metrics.
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## Installation
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```shell
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go get github.com/uptrace/opentelemetry-go-extra/otelsql
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```
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## Usage
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To instrument database/sql, you need to connect to a database using the API provided by otelsql:
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| sql | otelsql |
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| --------------------------- | ------------------------------- |
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| `sql.Open(driverName, dsn)` | `otelsql.Open(driverName, dsn)` |
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| `sql.OpenDB(connector)` | `otelsql.OpenDB(connector)` |
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```go
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import (
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"github.com/uptrace/opentelemetry-go-extra/otelsql"
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semconv "go.opentelemetry.io/otel/semconv/v1.10.0"
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)
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db, err := otelsql.Open("sqlite", "file::memory:?cache=shared",
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otelsql.WithAttributes(semconv.DBSystemSqlite),
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otelsql.WithDBName("mydb"))
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if err != nil {
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panic(err)
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}
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// db is *sql.DB
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```
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And then use context-aware API to propagate the active span via
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[context](https://uptrace.dev/opentelemetry/go-tracing.html#context):
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```go
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var num int
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if err := db.QueryRowContext(ctx, "SELECT 42").Scan(&num); err != nil {
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panic(err)
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}
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```
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See [example](/example/) for details.
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## Options
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Both [otelsql.Open](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql#Open) and
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[otelsql.OpenDB](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql#OpenDB) accept
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the same [options](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql#Option):
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- [WithAttributes](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql#WithAttributes)
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configures attributes that are used to create a span.
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- [WithDBName](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql#WithDBName)
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configures a `db.name` attribute.
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- [WithDBSystem](https://pkg.go.dev/github.com/uptrace/opentelemetry-go-extra/otelsql#WithDBSystem)
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configures a `db.system` attribute. When possible, you should prefer using WithAttributes and
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[semconv](https://pkg.go.dev/go.opentelemetry.io/otel/semconv/v1.10.0), for example,
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`otelsql.WithAttributes(semconv.DBSystemSqlite)`.
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## sqlboiler
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You can use otelsql to instrument [sqlboiler](https://github.com/volatiletech/sqlboiler) ORM:
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```go
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import (
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"github.com/uptrace/opentelemetry-go-extra/otelsql"
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semconv "go.opentelemetry.io/otel/semconv/v1.10.0"
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)
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db, err := otelsql.Open("postgres", "dbname=fun user=abc",
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otelsql.WithAttributes(semconv.DBSystemPostgreSQL))
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if err != nil {
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return err
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}
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boil.SetDB(db)
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```
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## GORM 1
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You can use otelsql to instrument [GORM 1](https://v1.gorm.io/):
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```go
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import (
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"github.com/jinzhu/gorm"
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"github.com/uptrace/opentelemetry-go-extra/otelsql"
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semconv "go.opentelemetry.io/otel/semconv/v1.10.0"
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)
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// gormOpen is like gorm.Open, but it uses otelsql to instrument the database.
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func gormOpen(driverName, dataSourceName string, opts ...otelsql.Option) (*gorm.DB, error) {
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db, err := otelsql.Open(driverName, dataSourceName, opts...)
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if err != nil {
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return nil, err
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}
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return gorm.Open(driverName, db)
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}
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db, err := gormOpen("mysql", "user:password@/dbname",
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otelsql.WithAttributes(semconv.DBSystemMySQL))
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if err != nil {
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panic(err)
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}
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```
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To instrument GORM 2, use
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[otelgorm](https://github.com/uptrace/opentelemetry-go-extra/tree/main/otelgorm).
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## Alternatives
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- https://github.com/XSAM/otelsql - different driver registration and no metrics.
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- https://github.com/j2gg0s/otsql - like XSAM/otelsql but with Prometheus metrics.
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