examples/overlay-network/setup_wg_mesh.sh
2025-06-14 03:50:35 +03:00

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#!/bin/bash
# SPDX-License-Identifier: Apache-2.0
script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
cd $script_dir
set -e
export FORMAT=YAML
mkdir -p tmp/wg
mkdir -p tmp/logs
rm tmp/vms/*inspect.yaml || true
vms=()
# inspect VMs
for vm_config in $(grep -r uuid: tmp/vms/ | awk '{ print $2}'); do
vm_id=$(echo $vm_config | cut -d '/' -f2 | cut -d '.' -f1)
detee-cli vm inspect $vm_id > tmp/vms/${vm_id}_inspect.yaml
vm_name=$(grep 'hostname: ' tmp/vms/${vm_id}_inspect.yaml |
awk '{ print $2 }')
mv tmp/vms/${vm_id}_inspect.yaml tmp/vms/${vm_name}_inspect.yaml
done
# define VM object
vm_count=0
new_vm() {
(( vm_count++ )) || true
local vm_name="$1"
local vm_id="vm$vm_count"
local vm_install_data="tmp/vms/${vm_name}_install.yaml"
local vm_inspect_data="tmp/vms/${vm_name}_inspect.yaml"
vm_node_ip=$(grep 'ip: ' $vm_install_data | awk '{ print $2 }')
vm_port=$(grep exposed_ports -A 1 $vm_inspect_data | tail -1 | grep -oE "[0-9]*")
wg_privkey=$(wg genkey)
wg_pubkey=$(echo $wg_privkey | wg pubkey)
declare -gA "$vm_id"
eval "$vm_id[id]=$vm_count"
eval "$vm_id[name]=$vm_name"
eval "$vm_id[port]=$vm_port"
eval "$vm_id[node_ip]=$vm_node_ip"
eval "$vm_id[private_ip]=10.254.254.$vm_count"
eval "$vm_id[wg_priv]=$wg_privkey"
eval "$vm_id[wg_pub]=$wg_pubkey"
vms+=("$vm_id")
}
# loops over all VMs
for vm_install_file in tmp/vms/*_install.yaml; do
vm_name=$(echo $vm_install_file | cut -d '/' -f3 | cut -d '_' -f1)
new_vm $vm_name
done
# loops over all VMs in array
for main_vm_loop in "${vms[@]}"; do
declare -n main_vm_ref="$main_vm_loop"
wg_file="tmp/wg/${main_vm_ref[name]}.ini"
{
echo "[Interface]"
echo "Address = "${main_vm_ref[private_ip]}" "
echo "PrivateKey = "${main_vm_ref[wg_priv]}" "
echo "ListenPort = 22"
} > ${wg_file}
ssh="ssh -p ${main_vm_ref[port]} root@${main_vm_ref[node_ip]}"
$ssh sed -i '/10.254.254./d' /etc/hosts
echo ${main_vm_ref[private_ip]} ${main_vm_ref[name]} | $ssh tee -a /etc/hosts > /dev/null
for inner_vm_loop in "${vms[@]}"; do
declare -n inner_vm_ref="$inner_vm_loop"
[[ "${inner_vm_ref[id]}" == "${main_vm_ref[id]}" ]] && continue
echo ${inner_vm_ref[private_ip]} ${inner_vm_ref[name]} | $ssh tee -a /etc/hosts > /dev/null
{
echo
echo "[Peer]"
echo "PublicKey = ${inner_vm_ref[wg_pub]}"
echo "Endpoint = ${inner_vm_ref[node_ip]}:${inner_vm_ref[port]}"
echo "AllowedIPs = ${inner_vm_ref[private_ip]}"
echo "PersistentKeepalive = 25"
} >> ${wg_file}
done
echo WireGuard config written to ${wg_file}
$ssh pacman -Syu --noconfirm > tmp/logs/${main_vm_ref[name]}.log 2>&1
$ssh pacman -S wireguard-tools --needed --noconfirm >> tmp/logs/${main_vm_ref[name]}.log 2>&1
echo Packages installed for ${main_vm_ref[name]}
# TODO: enable this if needed, or delete from code
# $ssh sysctl -w net.ipv4.conf.all.forwarding=1 > /dev/null
cat ${wg_file} | $ssh tee /etc/wireguard/brain.conf > /dev/null
{
$ssh wg-quick down brain || true
$ssh wg-quick up brain || true
$ssh wg-quick up brain || true
$ssh systemctl enable wg-quick@brain || true
} >> tmp/logs/${main_vm_ref[name]}.log 2>&1
echo WireGuard started on ${main_vm_ref[name]}
done