From 527ab267e87d5e6413c34b6094869fe112d6f706 Mon Sep 17 00:00:00 2001
From: Damien Mathieu <42@dmathieu.com>
Date: Thu, 27 Jan 2022 14:40:53 +0100
Subject: [PATCH] only enable OpenTelemetry if the module has been loaded

---
 internal/ingress/controller/template/template.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/internal/ingress/controller/template/template.go b/internal/ingress/controller/template/template.go
index c7b10d92c2..37b938c2e5 100644
--- a/internal/ingress/controller/template/template.go
+++ b/internal/ingress/controller/template/template.go
@@ -1653,6 +1653,14 @@ func shouldLoadOpenTelemetryModule(c interface{}, s interface{}) bool {
 		return false
 	}
 
+	if _, err := os.Stat("/etc/nginx/modules/otel_ngx_module.so"); err != nil {
+		klog.Errorf("couldn't retrieve otel_ngx_module.so. Got %#v", err)
+
+		// Switch the config to false so the templates don't try loading the plugin
+		cfg.EnableOpenTelemetry = false
+		return false
+	}
+
 	if cfg.EnableOpenTelemetry {
 		return true
 	}