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fix: require kernel 5.8, the first with BPF ring buffers #363

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Merged
mayankpande88 merged 2 commits into from
Oct 6, 2026
Merged

fix: require kernel 5.8, the first with BPF ring buffers #363

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e23f0fb
fix: require kernel 5.8, the first with BPF ring buffers
mayankpande88 Oct 6, 2026
e0dca43
Merge branch 'main' into fix/min-kernel-5.8
mayankpande88 Oct 6, 2026
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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ A per-node observability agent for Kubernetes and Linux hosts. The agent
gathers container and host metrics, logs, and L7 traffic using eBPF and
exposes them in Prometheus format.

Minimum Linux kernel: **5.1** (eBPF CO-RE).
Minimum Linux kernel: **5.8** (L7 events use a BPF ring buffer).

> This project is a fork of
> [coroot/coroot-node-agent](https://github.com/coroot/coroot-node-agent)
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7 changes: 5 additions & 2 deletions main.go
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Expand Up @@ -189,8 +189,11 @@ func main() {
klog.Exitln(err)
}

if !common.GetKernelVersion().GreaterOrEqual(common.NewVersion(4, 16, 0)) {
klog.Exitln("the minimum Linux kernel version required is 4.16 or later")
// L7 events go through a BPF ring buffer (BPF_MAP_TYPE_RINGBUF), which
// every program variant uses and which kernels before 5.8 do not have:
// on them the programs fail to load further on, with a less clear error.
if !common.GetKernelVersion().GreaterOrEqual(common.NewVersion(5, 8, 0)) {
klog.Exitln("the minimum Linux kernel version required is 5.8 or later (BPF ring buffer)")
}

resolver, err := newIPResolver(hostname)
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