Docker CE on RHEL 8 with IPTables

docker-ce-rhel8.sh

#!/bin/bash

# Add Docker CE Repo
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

# Configure Docker CE Repo
sudo sed -i '/^gpgkey=https:\/\/download.docker.com\/linux\/centos\/gpg/a module_hotfixes=True' /etc/yum.repos.d/docker-ce.repo

# Install Docker CE
sudo dnf install -y docker-ce

# Install Docker Compose
sudo curl -L https://github.com/docker/compose/releases/download/1.25.4/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
sudo restorecon -v /usr/local/bin/docker-compose

# Enable IP Forwarding
echo "net.ipv4.ip_forward = 1" | sudo tee -a /etc/sysctl.d/50-docker-forward.conf

# Install IPTables Service
sudo dnf install -y iptables-services
sudo systemctl disable firewalld || true
sudo systemctl disable nftables || true
sudo systemctl enable --now iptables

# Ensure IPTables Modules are loaded at boot
# Not sure if this is required yet
for mod in ip_tables ip_vs_sh ip_vs ip_vs_rr ip_vs_wrr; do sudo modprobe $mod; echo $mod | sudo tee -a /etc/modules-load.d/iptables.conf; done

sudo restorecon -v /etc/sysctl.d/50-docker-forward.conf /etc/modules-load.d/iptables.conf

sudo systemctl enable --now docker

exit 0

https://access.redhat.com/solutions/3897641