Cilium CNI System Requirements

Cilium CNI version dependencies and compatibilities .

Overview

This page lists the system requirements for each Platform9 Managed Kubernetes release that supports Cilium CNI. Requirements are based on the Cilium system requirements with Platform9specific testing noted in the Tested column.

Release 5.14 - Cilium 1.17.2

Components	Required Versions	Tested
Linux kernel	>= 5.4 or >= 4.18 on RHEL 8.10	_
etcd	>= 3.1.0	3.5.12
Ubuntu	>=20.04	Ubuntu 22, Ubuntu 24
RedHat Enterprise Linux	>= 8.6	RHL 8.10
CentOS	>= 8.6
Routing Mode	Tunnel

Routing mode: Tunnel

Release 5.15 - Cilium 1.18.4

Platform9 supports only Ubuntu 24.04 with Cilium 1.18.4.

The following OS and kernel combinations are not compatible with Cilium 1.18:

• Ubuntu 22.04 LTS GA kernel (5.15.0-67-generic). Upgrade to Ubuntu 24.04 which provides 5.15.0-1090-kvm to ensure Cilium 1.18.4 compatibility.
• RHEL 8.10 with kernel 4.18.0-553.el8_10.x86_64.

Components	Required Versions	Tested On
Linux kernel	>= 5.15.0-67-generic or >= 4.18 on RHEL 8.10	_
etcd	>= 3.1.0	3.5.12
Ubuntu	>=20.04	Ubuntu 24
RedHat Enterprise Linux	>= 8.6
CentOS	>= 8.6
Routing Mode	Tunnel and Native (Using API call )

Most of the Above Requirements are taken from official Cilium docs .

For Cilium CNI, the kernel version in Ubuntu 22.04 is not supported by Cilium 1.18.4. Ubuntu 22.04 LTS GA kernel (5.15.0-67-generic) is incompatible. Users must upgrade to Ubuntu 24.04 or Ubuntu 22.04 HWE kernel, which provides 5.15.0-1090-kvm to ensure Cilium 1.18.4 compatibility.