cloud/shepherd/wrapngo: don't crash on remote API errors

A regression test for this will come in a subsequent CL.

Change-Id: Ic2c1f872bcea510bef7adbdb6ed86f504733ecca
Reviewed-on: https://review.monogon.dev/c/monogon/+/1549
Tested-by: Jenkins CI
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
diff --git a/cloud/shepherd/equinix/wrapngo/duct_tape.go b/cloud/shepherd/equinix/wrapngo/duct_tape.go
index c9e156b..f58cf7b 100644
--- a/cloud/shepherd/equinix/wrapngo/duct_tape.go
+++ b/cloud/shepherd/equinix/wrapngo/duct_tape.go
@@ -65,7 +65,11 @@
 func (r *injectContextRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
 	klog.V(5).Infof("Request -> %v", req.URL.String())
 	res, err := r.original.RoundTrip(req.WithContext(r.ctx))
-	klog.V(5).Infof("Response <- %v", res.Status)
+	if err != nil {
+		klog.V(5).Infof("HTTP error <- %v", err)
+	} else {
+		klog.V(5).Infof("Response <- %v", res.Status)
+	}
 	return res, err
 }