Spree Rails multi store subdomains does not work on live server

Question

I am using spree-multi-domain

store1.localhost:3000 is working fine locally but when I moved my code on the live server I am unable to make it working. When I hit URL store1.mydomain.com it is giving me an error.

ERROR:
    This site can’t be reached
    abc.mydomain.com’s server IP address could not be found.
    DNS_PROBE_FINISHED_NXDOMAIN

Also I have tried adding this

config.action_dispatch.tld_length = 2

in config/enviroments/production.rb

I am on apache server . Do I need to do anything on server side as well to make it working ?

Apache Config:

<VirtualHost *:80>
    # The ServerName directive sets the request scheme, hostname and port that
    # the server uses to identify itself. This is used when creating
    # redirection URLs. In the context of virtual hosts, the ServerName
    # specifies what hostname must appear in the request's Host: header to
    # match this virtual host. For the default virtual host (this file) this
    # value is not decisive as it is used as a last resort host regardless.
    # However, you must set it for any further virtual host explicitly.
    #ServerName www.example.com

    ServerAdmin webmaster@localhost
        ServerName mydomain.com
        ServerAlias mydomain.com rails        
#        ProxyPass / http://127.0.0.1:3000/
        ProxyPassReverse / http://127.0.0.1:3000/
    #DocumentRoot /var/www/html

    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with "a2disconf".
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

in /etc/apache2/sites-available/000-default.conf

Answer 1

Server name missing from your apache config for subdomain:

<VirtualHost *:80>
  ServerName store1.mydomain.com
  # Tell your app's 'public' directory path
  DocumentRoot /var/www/store1.mydomain.com/public
</VirtualHost>

For dynamic or n subdomains:

<VirtualHost *:80>
  ServerName mydomain.com
  ServerAlias *.mydomain.com
  # Tell your app's 'public' directory path
  DocumentRoot /var/www/mydomain.com/public
</VirtualHost>