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feat: Enable headless installation without interaction

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This commit is contained in:
Goetz Epperlein 2024-03-16 16:37:20 +01:00
parent 39caf2fcf6
commit 364c93b9fe
2 changed files with 93 additions and 15 deletions
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33
README.md
View File

@ -39,6 +39,39 @@ It will install WireGuard (kernel module and tools) on the server, configure it,
Run the script again to add or remove clients!
## Headless installation
It's also possible to run the script headless, e.g. without waiting for user input, in an automated way.
Example usage:
```bash
APPROVE_INSTALL=y ./wireguard-install.sh
# or
export APPROVE_INSTALL=y
./wireguard-install.sh
```
This will set a default set of variables, bypassing any user input.
If you want to customise your installation, you can use variables, as shown below:
```
export APPROVE_INSTALL=y
export SERVER_PUB_IP="54.14.1.48"
export SERVER_PORT=64567
export CLIENT_NAME=client
```
If the server is behind NAT, you can specify its endpoint with the `SERVER_PUB_IP` variable. If the endpoint is the public IP address which it is behind, you can use `SERVER_PUB_IP=$(curl -s https://api.ipify.org)` (the script defaults to this). The endpoint can be an IP or a domain.
The headless installation involves adding a new user. Adding `CLIENT_NAME=foo` will change the name of the new user to `foo` instead of the default.
Other variables can be set as required on your choice (`SERVER_NIC`). You can find them in the `installQuestions()` function of the script.
## Providers
I recommend these cheap cloud providers for your VPN server:

63
wireguard-install.sh
View File

@ -110,29 +110,38 @@ function installQuestions() {
echo ""
# Detect public IPv4 or IPv6 address and pre-fill for the user
SERVER_PUB_IP=$(ip -4 addr | sed -ne 's|^.* inet \([^/]*\)/.* scope global.*$|\1|p' | awk '{print $1}' | head -1)
SERVER_PUB_IP=${SERVER_PUB_IP:-$(ip -4 addr | sed -ne 's|^.* inet \([^/]*\)/.* scope global.*$|\1|p' | awk '{print $1}' | head -1)}
if [[ -z ${SERVER_PUB_IP} ]]; then
# Detect public IPv6 address
SERVER_PUB_IP=$(ip -6 addr | sed -ne 's|^.* inet6 \([^/]*\)/.* scope global.*$|\1|p' | head -1)
fi
APPROVE_IP=${APPROVE_IP:-n}
if [[ ${APPROVE_IP} =~ n ]]; then
read -rp "IPv4 or IPv6 public address: " -e -i "${SERVER_PUB_IP}" SERVER_PUB_IP
fi
# Detect public interface and pre-fill for the user
SERVER_NIC="$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)"
until [[ ${SERVER_PUB_NIC} =~ ^[a-zA-Z0-9_]+$ ]]; do
SERVER_NIC="${SERVER_NIC:-$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)}"
APPROVE_NIC=${APPROVE_NIC:-n}
if [[ ${APPROVE_IP} =~ n ]]; then
until [[ ${SERVER_PUB_NIC} =~ ^[a-zA-Z0-9_]+$ || ${APPROVE_NIC} =~ n ]]; do
read -rp "Public interface: " -e -i "${SERVER_NIC}" SERVER_PUB_NIC
done
else
SERVER_PUB_NIC="${SERVER_NIC}"
fi
until [[ ${SERVER_WG_NIC} =~ ^[a-zA-Z0-9_]+$ && ${#SERVER_WG_NIC} -lt 16 ]]; do
read -rp "WireGuard interface name: " -e -i wg0 SERVER_WG_NIC
read -rp "WireGuard interface name: " -e -i "${SERVER_WG_NIC_DEFAULT}" SERVER_WG_NIC
done
until [[ ${SERVER_WG_IPV4} =~ ^([0-9]{1,3}\.){3} ]]; do
read -rp "Server WireGuard IPv4: " -e -i 10.66.66.1 SERVER_WG_IPV4
read -rp "Server WireGuard IPv4: " -e -i "${SERVER_WG_IPV4_DEFAULT}" SERVER_WG_IPV4
done
until [[ ${SERVER_WG_IPV6} =~ ^([a-f0-9]{1,4}:){3,4}: ]]; do
read -rp "Server WireGuard IPv6: " -e -i fd42:42:42::1 SERVER_WG_IPV6
read -rp "Server WireGuard IPv6: " -e -i "${SERVER_WG_IPV6_DEFAULT}" SERVER_WG_IPV6
done
# Generate random number within private ports range
@ -143,10 +152,10 @@ function installQuestions() {
# Adguard DNS by default
until [[ ${CLIENT_DNS_1} =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do
read -rp "First DNS resolver to use for the clients: " -e -i 1.1.1.1 CLIENT_DNS_1
read -rp "First DNS resolver to use for the clients: " -e -i "${CLIENT_DNS_1_DEFAULT}" CLIENT_DNS_1
done
until [[ ${CLIENT_DNS_2} =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do
read -rp "Second DNS resolver to use for the clients (optional): " -e -i 1.0.0.1 CLIENT_DNS_2
read -rp "Second DNS resolver to use for the clients (optional): " -e -i "${CLIENT_DNS_2_DEFAULT}" CLIENT_DNS_2
if [[ ${CLIENT_DNS_2} == "" ]]; then
CLIENT_DNS_2="${CLIENT_DNS_1}"
fi
@ -156,17 +165,44 @@ function installQuestions() {
echo -e "\nWireGuard uses a parameter called AllowedIPs to determine what is routed over the VPN."
read -rp "Allowed IPs list for generated clients (leave default to route everything): " -e -i '0.0.0.0/0,::/0' ALLOWED_IPS
if [[ ${ALLOWED_IPS} == "" ]]; then
ALLOWED_IPS="0.0.0.0/0,::/0"
ALLOWED_IPS="${ALLOWED_IPS_DEFAULTS}"
fi
done
echo ""
echo "Okay, that was all I needed. We are ready to setup your WireGuard server now."
echo "You will be able to generate a client at the end of the installation."
APPROVE_INSTALL=${APPROVE_INSTALL:-n}
if [[ $APPROVE_INSTALL =~ n ]]; then
read -n1 -r -p "Press any key to continue..."
fi
}
function installWireGuard() {
SERVER_WG_NIC_DEFAULT="wg0"
SERVER_WG_IPV4_DEFAULT="10.66.66.1"
SERVER_WG_IPV6_DEFAULT="fd42:42:42::1"
CLIENT_DNS_1_DEFAULT="1.1.1.1"
CLIENT_DNS_2_DEFAULT="1.0.0.1"
ALLOWED_IPS_DEFAULTS="0.0.0.0/0,::/0"
if [[ ${APPROVE_INSTALL} == "y" ]]; then
# Set default choices so that no questions will be asked.
APPROVE_IP=${APPROVE_IP:-y}
APPROVE_NIC=${APPROVE_NIC:-y}
SERVER_WG_NIC=${SERVER_WG_NIC:-$SERVER_WG_NIC_DEFAULT}
SERVER_WG_IPV4=${SERVER_WG_IPV4:-$SERVER_WG_IPV4_DEFAULT}
SERVER_WG_IPV6=${SERVER_WG_IPV6:-$SERVER_WG_IPV6_DEFAULT}
SERVER_PORT=${SERVER_PORT:-$(shuf -i49152-65535 -n1)}
CLIENT_DNS_1=${CLIENT_DNS_1:-$CLIENT_DNS_1_DEFAULT}
CLIENT_DNS_2=${CLIENT_DNS_2:-$CLIENT_DNS_2_DEFAULT}
CLIENT_NAME=${CLIENT_NAME:-client}
ALLOWED_IPS=${ALLOWED_IPS:-$ALLOWED_IPS_DEFAULTS}
# Behind NAT, we'll default to the publicly reachable IPv4.
SERVER_PUB_IP=${SERVER_PUB_IP:-$(curl -s https://api.ipify.org)}
fi
# Run setup questions first
installQuestions
@ -295,6 +331,7 @@ function newClient() {
echo ""
echo "The client name must consist of alphanumeric character(s). It may also include underscores or dashes and can't exceed 15 chars."
CLIENT_EXISTS=$(grep -c -E "^### Client ${CLIENT_NAME}\$" "/etc/wireguard/${SERVER_WG_NIC}.conf")
until [[ ${CLIENT_NAME} =~ ^[a-zA-Z0-9_-]+$ && ${CLIENT_EXISTS} == '0' && ${#CLIENT_NAME} -lt 16 ]]; do
read -rp "Client name: " -e CLIENT_NAME
CLIENT_EXISTS=$(grep -c -E "^### Client ${CLIENT_NAME}\$" "/etc/wireguard/${SERVER_WG_NIC}.conf")
@ -321,7 +358,11 @@ function newClient() {
BASE_IP=$(echo "$SERVER_WG_IPV4" | awk -F '.' '{ print $1"."$2"."$3 }')
until [[ ${IPV4_EXISTS} == '0' ]]; do
if [[ $APPROVE_INSTALL =~ n ]]; then
read -rp "Client WireGuard IPv4: ${BASE_IP}." -e -i "${DOT_IP}" DOT_IP
fi
CLIENT_WG_IPV4="${BASE_IP}.${DOT_IP}"
IPV4_EXISTS=$(grep -c "$CLIENT_WG_IPV4/32" "/etc/wireguard/${SERVER_WG_NIC}.conf")
@ -334,7 +375,11 @@ function newClient() {
BASE_IP=$(echo "$SERVER_WG_IPV6" | awk -F '::' '{ print $1 }')
until [[ ${IPV6_EXISTS} == '0' ]]; do
if [[ $APPROVE_INSTALL =~ n ]]; then
read -rp "Client WireGuard IPv6: ${BASE_IP}::" -e -i "${DOT_IP}" DOT_IP
fi
CLIENT_WG_IPV6="${BASE_IP}::${DOT_IP}"
IPV6_EXISTS=$(grep -c "${CLIENT_WG_IPV6}/128" "/etc/wireguard/${SERVER_WG_NIC}.conf")