Merge pull request #14 from HoopadCorp/feature/enable_dns_manaual_changes

Feature/enable dns manaual changes

Author: mohsenkamini

installation/.install-lib.sh

@@ -105,7 +105,8 @@ NOTICE:
 	After this operation you won't be able to access SSH service at port $current_port anymore.
 	The SSH port will be changed to $DEFAULT_SSH_PORT
 	
-	
+
+
 	
 "
 		set -x;
@@ -141,3 +142,67 @@ function snmpd_initial_conf () {
 		set -x
 	fi
 }
+
+function disable_stop_systemd_resolved () {
+	
+	systemctl disable systemd-resolved
+	systemctl stop systemd-resolved
+}
+
+function save_current_nameserver_conf_and_disable_resolved () {
+
+# This function enables django to be able to change the
+# nameservers by simply editing /etc/resolv.conf .
+	
+	nameserver1="1.1.1.1"
+	nameserver2="9.9.9.9"
+	current_etc_resolv_conf=`cat /etc/resolv.conf | grep nameserver | awk '{print $2}'`
+	netplan_conf_file=`ls /etc/netplan/*.y*ml | head -1`
+	if [[ $current_etc_resolv_conf == "127.0.0.53" ]]
+	then 
+		nameserver1_temp=`cat ${netplan_conf_file} | yq -e '.network.*.*.nameservers.addresses[]' | head -1 `
+		nameserver2_temp=`cat ${netplan_conf_file} | yq -e '.network.*.*.nameservers.addresses[]' | head -2 | tail -1`
+		
+		if [[ -n $nameserver1_temp ]]
+		then
+			nameserver1=`echo $nameserver1_temp`
+			if [[ -n $nameserver1_temp ]]
+			then 
+				nameserver2=`echo $nameserver2_temp`
+			fi
+		fi
+	else
+		if [[ -n $current_etc_resolv_conf ]]
+		then
+			nameserver1_temp=`cat /etc/resolv.conf | grep nameserver | awk '{print $2}'| head -1 `
+			nameserver2_temp=`cat /etc/resolv.conf | grep nameserver | awk '{print $2}'| head -2 | tail -1`
+			if [[ -n $nameserver1_temp ]]
+			then
+				nameserver1=`echo $nameserver1_temp`
+				if [[ -n $nameserver1_temp ]]
+				then 
+					nameserver2=`echo $nameserver2_temp`
+				fi
+			fi
+		fi
+	fi
+	
+	chattr -i /etc/resolv.conf
+	rm /etc/resolv.conf
+	disable_stop_systemd_resolved
+	echo "nameserver $nameserver1" > /etc/resolv.conf
+	echo "nameserver $nameserver2" >> /etc/resolv.conf
+	set +x
+	
+	echo "PLEASE NOTE:
+	The following servers are set as your DNS servers.
+	you can change this configuration by editing /etc/resolv.conf
+	
+	"
+	cat /etc/resolv.conf
+	
+	set -x
+
+}
+
+

installation/install.sh

@@ -21,3 +21,4 @@ set_fib_ip_no_pmtu_disc_1
 fprobe_conf
 set_ssh_default_port
 snmpd_initial_conf
+save_current_nameserver_conf_and_disable_resolved