Add Centos 8 Support (#506)

README.md

@@ -109,6 +109,7 @@ The script supports these OS and architectures:
 | -------------- | ---- | ----- | ----- | ----- |
 | Amazon Linux 2 |  ❔  |  ✅  |   ❔  |   ❔  |
 |  Arch Linux    |  ❔  |  ✅  |   ❔  |   ✅  |
+|   Centos 8     |  ❌  |  ✅  |   ❔  |   ❔  |
 |   CentOS 7     |  ❔  |  ✅  |   ❌  |   ✅  |
 |   Debian 8     |  ✅  |  ✅  |   ❌  |   ❌  |
 |   Debian 9     |  ❌  |  ✅  |   ✅  |   ✅  |

openvpn-install.sh

@@ -54,7 +54,7 @@ function checkOS () {
 		source /etc/os-release
 		if [[ "$ID" = "centos" ]]; then
 			OS="centos"
-			if [[ ! $VERSION_ID == "7" ]]; then
+			if [[ ! $VERSION_ID =~ (7|8) ]]; then
 				echo "⚠️ Your version of CentOS is not supported."
 				echo ""
 				echo "The script only support CentOS 7."
@@ -621,7 +621,7 @@ function installOpenVPN () {
 		apt-get install -y openvpn iptables openssl wget ca-certificates curl
 	elif [[ "$OS" = 'centos' ]]; then
 		yum install -y epel-release
-		yum install -y openvpn iptables openssl wget ca-certificates curl
+		yum install -y openvpn iptables openssl wget ca-certificates curl tar
 	elif [[ "$OS" = 'amzn' ]]; then
 		amazon-linux-extras install -y epel
 		yum install -y openvpn iptables openssl wget ca-certificates curl
@@ -668,12 +668,13 @@ function installOpenVPN () {
 	SERVER_NAME="server_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)"
 	echo "set_var EASYRSA_REQ_CN $SERVER_CN" >> vars
 
-	# Workaround to remove unharmful error until easy-rsa 3.0.7
-	# https://github.com/OpenVPN/easy-rsa/issues/261
-	sed -i 's/^RANDFILE/#RANDFILE/g' pki/openssl-easyrsa.cnf
-
 	# Create the PKI, set up the CA, the DH params and the server certificate
 	./easyrsa init-pki
+
+        # Workaround to remove unharmful error until easy-rsa 3.0.7
+        # https://github.com/OpenVPN/easy-rsa/issues/261
+        sed -i 's/^RANDFILE/#RANDFILE/g' pki/openssl-easyrsa.cnf
+
 	./easyrsa --batch build-ca nopass
 
 	if [[ $DH_TYPE == "2" ]]; then
@@ -848,7 +849,7 @@ verb 3" >> /etc/openvpn/server.conf
 	fi
 
 	# Finally, restart and enable OpenVPN
-	if [[ "$OS" = 'arch' || "$OS" = 'fedora' ]]; then
+	if [[ "$OS" = 'arch' || "$OS" = 'fedora' || "$OS" = 'centos' ]]; then
 		# Don't modify package-provided service
 		cp /usr/lib/systemd/system/openvpn-server@.service /etc/systemd/system/openvpn-server@.service
 
@@ -1144,7 +1145,7 @@ function removeOpenVPN () {
 		PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
 
 		# Stop OpenVPN
-		if [[ "$OS" =~ (fedora|arch) ]]; then
+		if [[ "$OS" =~ (fedora|arch|centos) ]]; then
 			systemctl disable openvpn-server@server
 			systemctl stop openvpn-server@server
 			# Remove customised service