release(otel): Bump otel package to v0.1.0

otel/CHANGELOG.md

@@ -0,0 +1,7 @@
+# Changelog
+
+## To be released
+
+## v0.1.0
+
+- Initial version of the `otel` package to initialize the OpenTelemetry SDK to send metrics

otel/README.md

@@ -1,26 +1,44 @@
-# How to use
+# Package `otel` v0.1.0 
 
-```go
+## Usage
 
+```go
 package main
 
 import (
-  "context"
+    "context"
+
+	otelsdk "go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	sdkmetric "go.opentelemetry.io/otel/metric"
 
-  "github.com/Scalingo/go-utils/otel"
-  "github.com/kelseyhightower/envconfig"
+    "github.com/Scalingo/go-utils/otel"
 )
 
 func main() {
-  ctx := context.Background()
+    ctx := context.Background()
+
+    // Initialize OpenTelemetry SDK
+    shutdown, err := otel.Init(ctx)
+    if err != nil {
+        fmt.Printf("init otel: %v\n", err)
+        return
+    }
+    // Handle collection of metrics properly when service shut down
+    defer shutdown(ctx)
+
+	// Create a meter
+	meter := otelsdk.Meter("deployment")
 
-  // Initialize Otel
-  err := otel.New(ctx)
-  if err != nil {
-    return
-  }
+	// Create an instrument, based on the meter previously created
+	deploymentCount, err := meter.Int64Counter("deployment_count", sdkmetric.WithDescription("Number of deployments"))
+	if err != nil {
+		fmt.Printf("instrument creation failed: %v\n", err)
+		return
+	}
 
-  // Handle shutdown properly so nothing leaks.
-  defer otel.Shutdown(ctx)
+	// Create measurements on the instrument
+	deploymentCount.Add(ctx, 10, sdkmetric.WithAttributes(attribute.String("app_id", "caaaefb0-dcaa-4866-83d2-b581228169d8")))
+	deploymentCount.Add(ctx, 42, sdkmetric.WithAttributes(attribute.String("app_id", "caaaefb0-dcaa-4866-83d2-b581228169d8")))
 }
 ```

otel/otel_test.go

@@ -6,7 +6,6 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
-	otelsdk "go.opentelemetry.io/otel"
 )
 
 func TestInit(t *testing.T) {
@@ -57,8 +56,6 @@ func TestInit(t *testing.T) {
 				t.Cleanup(func() {
 					require.NoError(t, shutdown(ctx))
 				})
-
-				require.NotNil(t, otelsdk.GetMeterProvider())
 			}
 		})
 	}