Configure Rocky Linux / Centos for linuxserver/docker-wireguard

Imporant: Make sure secure boot is disabled on host OS i.e. Rocky Linux / Centos

Step 1: install epel and elrepo

sudo dnf install elrepo-release epel-release -y

Step 1 - optional: fix elrepo mirror issue

if you face any issue running dnf update after installing elrepo then edit /etc/yum.repos.d/elrepo.repo and comment out mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo.el8

sudo vi /etc/yum.repos.d/elrepo.repo
# mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo.el8

Step 2: update

sudo dnf update -y

Step 3: install wireguard and enable it

sudo dnf install kmod-wireguard wireguard-tools -y
sudo dnf copr enable jdoss/wireguard
sudo dnf update -v
sudo dnf install wireguard-dkms -y
sudo modprobe wireguard

Step 4: reboot the server

reboot

Now you should be able to run wireguard on Rocky Linux / Centos

git clone https://github.com/uzairali001/docker-wireguard-rhel/ ./wireguard
cd ./wireguard
docker compose up -d

if you get this error

modprobe: ERROR: could not insert 'ip_tables': Exec format error
wireguard  | iptables v1.6.1: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
wireguard  | Perhaps iptables or your kernel needs to be upgraded.
wireguard  | [#] ip link delete dev wg0

then run this

sudo modprobe iptable_raw

To make it load automatically after reboot

sudo echo "iptable_raw" | sudo tee /etc/modules-load.d/iptable_raw.conf