ensure otel tracing is passed through all event handlers and clients

internal/metal/providers/emgql/client.go

@@ -5,6 +5,7 @@ import (
 	"net/url"
 	"time"
 
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 	"go.uber.org/zap"
 
 	"go.equinixmetal.net/infra9-metal-bridge/internal/metal/providers"
@@ -16,7 +17,8 @@ const (
 
 // DefaultHTTPClient is the default http client used if no client is provided.
 var DefaultHTTPClient = &http.Client{
-	Timeout: defaultHTTPTimeout,
+	Timeout:   defaultHTTPTimeout,
+	Transport: otelhttp.NewTransport(http.DefaultTransport),
 }
 
 var _ providers.Provider = &Client{}

internal/metal/providers/emgql/options.go

@@ -1,6 +1,7 @@
 package emgql
 
 import (
+	"net/http"
 	"net/url"
 
 	"go.uber.org/zap"
@@ -32,6 +33,15 @@ func WithBaseURL(baseURL string) Option {
 	}
 }
 
+// WithHTTPClient sets the http client to be used by the client.
+func WithHTTPClient(httpClient *http.Client) Option {
+	return func(c *Client) error {
+		c.httpClient = httpClient
+
+		return nil
+	}
+}
+
 // WithConfig applies all configurations defined in the config.
 func WithConfig(config Config) Option {
 	return func(c *Client) error {