[cilium] 更新内核要求：4.19+ → 5.10+#786
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WalkthroughThis PR updates Cilium/eBPF deployment documentation in both English and Chinese versions, clarifying the minimum Linux kernel requirement as 5.10+ and expanding the operating system support matrix with explicit version constraints and equivalence notes for various distributions. ChangesCilium/eBPF Compatibility Documentation
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Actionable comments posted: 2
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In
`@docs/en/solutions/How_to_Deploy_Cilium_eBPF_L4_LoadBalancer_with_Source_IP_Preservation.md`:
- Line 24: Update the RHEL 7.x kernel version string in the docs: replace the
line containing "RHEL 7.x (kernel version 3.10.x - 4.18.x)" with "RHEL 7.x
(kernel version 3.10.x)" in both language versions (the English entry shown and
the corresponding Chinese line), ensuring the kernel range for RHEL 7.x is
changed from "3.10.x - 4.18.x" to just "3.10.x".
- Around line 22-30: Update the kernel requirement wording: keep the general
"Linux kernel 5.10 or later" line but remove the inconsistent range in the
unsupported RHEL 7 entry (replace "RHEL 7.x (kernel 3.10.x - 4.18.x)" with "RHEL
7.x (kernel 3.10.x)"), and clarify RHEL 8 support by changing the supported list
item from "RHEL 8.x (kernel 4.18+ on RHEL 8.10, equivalent to 5.10)" to a
minimum-version form such as "RHEL 8.6+ (kernels with the required backports;
e.g., RHEL 8.10 with 4.18 is considered feature-equivalent to 5.10)" so the doc
references the exact phrases "Linux kernel 5.10 or later", "RHEL 7.x (kernel
3.10.x)", and "RHEL 8.6+" to locate and update the bullets consistently.
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docs/en/solutions/How_to_Deploy_Cilium_eBPF_L4_LoadBalancer_with_Source_IP_Preservation.mddocs/zh/solutions/How_to_Deploy_Cilium_eBPF_L4_LoadBalancer_with_Source_IP_Preservation.md
| > **Note**: Cilium/eBPF requires Linux kernel **5.10 or later** (or equivalent, e.g., 4.18 on RHEL 8.10). The following operating systems are **NOT supported**: | ||
| > - CentOS 7.x (kernel version 3.10.x) | ||
| > - RHEL 7.x (kernel version 3.10.x - 4.18.x) | ||
| > - Ubuntu 20.04 with HWE kernel disabled (kernel version 5.4.x) | ||
| > | ||
| > Supported operating systems: | ||
| > - Ubuntu 22.04 | ||
| > - RHEL 8.x | ||
| > - openEuler 22.03 | ||
| > - Ubuntu 22.04 (kernel 5.15+) | ||
| > - RHEL 8.x (kernel 4.18+ on RHEL 8.10, equivalent to 5.10) | ||
| > - openEuler 22.03 (kernel 5.10+) |
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🧩 Analysis chain
🌐 Web query:
What are the minimum Linux kernel requirements for Cilium eBPF as documented in the official Cilium documentation?
💡 Result:
According to the official Cilium documentation, the minimum Linux kernel requirement for running a Cilium agent is kernel version 5.10 or later [1][2]. Equivalent versions, such as kernel 4.18 on RHEL 8.10, are also supported [1][2]. While 5.10 is the baseline requirement, the documentation notes that more recent kernels may provide additional eBPF functionality that Cilium will automatically detect and utilize [1][2]. Additionally, specific advanced features may require even newer kernel versions. For example, IPv6 BIG TCP support requires kernel 5.19 or later, while IPv4 BIG TCP support requires kernel 6.3 or later [1][3].
Citations:
- 1: https://docs.cilium.io/en/stable/operations/system_requirements/
- 2: https://docs.cilium.io/en/latest/operations/system_requirements/
- 3: https://github.com/cilium/cilium/blob/ea93cbd4/Documentation/operations/system_requirements.rst
🌐 Web query:
Does Cilium documentation confirm that RHEL 8.10 kernel 4.18 is equivalent to kernel 5.10 for eBPF support?
💡 Result:
Yes, the official Cilium documentation explicitly confirms that the kernel 4.18 found on RHEL 8.10 is considered equivalent to kernel 5.10 for the purpose of meeting Cilium's minimum system requirements [1][2][3]. This equivalence exists because Red Hat Enterprise Linux (RHEL) backports necessary eBPF features from newer upstream kernels into its 4.18 kernel, allowing it to satisfy the requirements that Cilium otherwise expects from a standard kernel version 5.10 or later [1][4]. As noted in the documentation, Cilium's agent performs checks on startup; while it generally recommends kernel 5.10 or later, it recognizes RHEL 8.x (specifically 8.6 and above) as having the necessary feature set for functionality [1][4]. Users should be aware that while this equivalence is documented for the minimum core requirements, certain advanced features may still have their own specific minimum kernel version dependencies [1].
Citations:
- 1: https://docs.cilium.io/en/stable/operations/system_requirements/
- 2: https://docs.cilium.io/en/latest/operations/system_requirements/
- 3: https://github.com/cilium/cilium/blob/ea93cbd4/Documentation/operations/system_requirements.rst
- 4: CFP: Bump minimum kernel version to v5.10 / RHEL 8.6 cilium/cilium#39150
Fix kernel requirement wording to match Cilium system requirements
- The “Linux kernel 5.10+” requirement and “RHEL 8.10 kernel 4.18 is equivalent to 5.10” are consistent with Cilium’s official requirements.
- Update the unsupported entry “RHEL 7.x (kernel 3.10.x - 4.18.x)”: RHEL 7 is 3.10-based, so the “- 4.18.x” portion is internally inconsistent.
- Clarify the supported RHEL 8 scope: Cilium recognizes RHEL 8.6+ as having the required feature set (so “RHEL 8.x” is too broad without a minimum version).
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In
`@docs/en/solutions/How_to_Deploy_Cilium_eBPF_L4_LoadBalancer_with_Source_IP_Preservation.md`
around lines 22 - 30, Update the kernel requirement wording: keep the general
"Linux kernel 5.10 or later" line but remove the inconsistent range in the
unsupported RHEL 7 entry (replace "RHEL 7.x (kernel 3.10.x - 4.18.x)" with "RHEL
7.x (kernel 3.10.x)"), and clarify RHEL 8 support by changing the supported list
item from "RHEL 8.x (kernel 4.18+ on RHEL 8.10, equivalent to 5.10)" to a
minimum-version form such as "RHEL 8.6+ (kernels with the required backports;
e.g., RHEL 8.10 with 4.18 is considered feature-equivalent to 5.10)" so the doc
references the exact phrases "Linux kernel 5.10 or later", "RHEL 7.x (kernel
3.10.x)", and "RHEL 8.6+" to locate and update the bullets consistently.
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变更概述
根据 Cilium 官方文档（requirements-generic），最低内核要求已从 4.19+ 提升至 5.10+。
变更内容
kernel 4.19+ (5.10+ recommended)→kernel 5.10 or later影响文件
docs/en/solutions/How_to_Deploy_Cilium_eBPF_L4_LoadBalancer_with_Source_IP_Preservation.mddocs/zh/solutions/How_to_Deploy_Cilium_eBPF_L4_LoadBalancer_with_Source_IP_Preservation.mdSummary by CodeRabbit
Documentation