How to make www.sitename.com to www2.sitename.com? - ssl

Question

Sorry to bother you with this, you've been a great community to learn from and I am very thankful. However, I couldn't find a solution to a task I'm having.
I want to change my domain from https://www.sitename.com to https://www2.sitename.com
Do you have any idea how I could do that? Any help would be immensely appreciated!
I am using nginx on ubuntu 16.04.
EDIT: I forgot to mention that I have to use Cloudflare.
My current configuration:
server{
server_name example.com;
rewrite ^/(.*) http://www.example.com/$1 permanent;
}
server {
#Ports
listen 80;
listen 443 ssl;
#Server name
server_name www2.example.com www.example.com example.com;
}
So far I am able to open what I want from www2.example.com but I need to redirect www.example.com example.com to www2.example.com

Answer 1

If you want to redirect then, in your nginx.conf you should do this
server {
server_name https://www.sitename.com/; // Old domain
return 301 https://www2.sitename.com/$request_uri; // New domain
}

Answer 2

So I was able to do it like this:
server{
#Ports
listen 80;
listen 443 ssl;
#Server name
server_name example.com www.example.com;
#Return
return 301 https://www2.example.com$request_uri;
}
server {
#Ports
listen 80;
listen 443 ssl;
#Server name
server_name www2.example.com;
}

Answer 3

You can set the first server with the domains you want to redirect
and remove those domains from the second server:
server{
server_name www.example.com example.com ;
rewrite ^/(.*) http://www2.example.com/$1 permanent;
}
server {
#Ports
listen 80;
listen 443 ssl;
#Server name
server_name www2.example.com;
}

Answer 4

Step 1 on CloudFlare in DNS section add A record www2 with your server IP
Step 2 Make your redirect.
you cay use this way
server {
listen 80;
listen 443 ssl;
server_name www.old-name.com;
return 301 $scheme://www.new-name.com$request_uri;
}
Step 3 restart NGINX
sudo service nginx restart