From cc210f75a73369457854c27993fc92ab6a1cbf1b Mon Sep 17 00:00:00 2001
From: Kang Huaishuai <khs1994@khs1994.com>
Date: Sun, 6 Sep 2020 09:30:17 +0800
Subject: [PATCH] [install] Update CentOS8

Signed-off-by: Kang Huaishuai <khs1994@khs1994.com>
---
 install/centos8.md | 24 ++++++++++++++++++++++++
 install/ubuntu.md  |  1 -
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/install/centos8.md b/install/centos8.md
index 3b110d2..02778ff 100644
--- a/install/centos8.md
+++ b/install/centos8.md
@@ -3,3 +3,27 @@
 当前官方版本的 Docker CE [尚未支持][docker-docker] CentOS8，我们可以使用 Moby 项目维护者 AkihiroSuda 所构建的包，具体请参考 https://github.com/AkihiroSuda/moby-snapshot。
 
 [docker-docker]:https://download.docker.com/linux/centos/
+
+## 设置
+
+由于 CentOS8 防火墙使用了 `nftables`，我们可以使用如下设置使用 `iptables`
+
+更改 `/etc/firewalld/firewalld.conf`
+
+```bash
+# FirewallBackend=nftables
+FirewallBackend=iptables
+```
+
+或者执行如下命令：
+
+```bash
+$ firewall-cmd --permanent --zone=trusted --add-interface=docker0
+
+$ firewall-cmd --reload
+```
+
+## 参考链接
+
+* https://firewalld.org/2018/07/nftables-backend
+* https://github.com/moby/libnetwork/issues/2496
diff --git a/install/ubuntu.md b/install/ubuntu.md
index 0435b08..a13629b 100644
--- a/install/ubuntu.md
+++ b/install/ubuntu.md
@@ -9,7 +9,6 @@
 Docker CE 支持以下版本的 [Ubuntu](https://ubuntu.com/server) 操作系统：
 
 * Ubuntu Focal 20.04 (LTS)
-* Eoan 19.10
 * Bionic 18.04 (LTS)
 * Xenial 16.04 (LTS)