From da1d263760b96813c82421cc56a30c0b3c5ecd7b Mon Sep 17 00:00:00 2001
From: Nikolay Sivko <n.sivko@gmail.com>
Date: Mon, 23 Dec 2024 14:16:00 +0300
Subject: [PATCH] handle missing `nf_conntrack` gracefully

---
 ebpftracer/tracer.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ebpftracer/tracer.go b/ebpftracer/tracer.go
index a0e3d25..3efde37 100644
--- a/ebpftracer/tracer.go
+++ b/ebpftracer/tracer.go
@@ -491,6 +491,12 @@ const nfConntrackEventsParameterPath = "/proc/sys/net/netfilter/nf_conntrack_eve
 func ensureConntrackEventsAreEnabled() error {
 	v, err := common.ReadUintFromFile(nfConntrackEventsParameterPath)
 	if err != nil {
+		if common.IsNotExist(err) {
+			klog.Warningf(
+				"unable to check the value of %s, it appears that nf_conntrack is not loaded: %s",
+				nfConntrackEventsParameterPath, err)
+			return nil
+		}
 		return err
 	}
 	if v != 1 {