Set up a Simple DNS Server in the Lab

While installing or using StarlingX, you may require a DNS server that you can add entries to for name resolution.

If you don’t have access to such a DNS server, here is an example procedure for standing up a simple Bind server on an Ubuntu 20.04 server.

Procedure

1. Run the following commands to install.

   $ sudo apt update
   $ sudo apt install bind9
   

2. Use the following commands for a basic setup.

   $ sudo ufw allow Bind9
   
   $ sudo vi /etc/bind/named.conf.options
           …
           dnssec-validation no;
   
           listen-on {
           10.10.10.0/24;     # this ubuntu server's address is 10.10.10.9/24
           };
   
           allow-query { any; };
   
           # If this DNS Server can't find name, forward to …
           forwarders {
           8.8.8.8;
           8.8.4.4;
           };
   
           …
   
   $ sudo named-checkconf
   
   $ sudo systemctl restart bind9
   
   # Test
   $ nslookup ubuntu.com 10.10.10.9
   

3. Add a domain, e.g. mydomain.com.

   $ sudo vi /etc/bind/named.conf.local
       …
       zone "mydomain.com" {
               type master;
               file "/etc/bind/db.mydomain.com";
       };
   
   $ sudo systemctl reload bind9
   
   $ sudo cp /etc/bind/db.local /etc/bind/db.mydomain.com
   
   # Edit db.mydomain.com … where HOSTNAME is hostname of the dns bind server
   $ sudo vi /etc/bind/db.mydomain.com
       ;
       ;
       ;
       $TTL    604800
       @       IN      SOA     HOSTNAME. admin.HOSTNAME. (
                                2        ; Serial
                           604800        ; Refresh
                            86400        ; Retry
                          2419200        ; Expire
                           604800 )      ; Negative Cache TTL
       ;
       @          IN      NS      HOSTNAME.
   
       @          IN      A       10.10.10.9
   
       wrcp            IN      A       10.10.10.2
       horizon.wrcp    IN      A       10.10.10.2
   
       registry        IN      A       10.10.10.10
   
   
   $ sudo rndc reload
   $ sudo systemctl reload bind9
   $ sudo systemctl restart bind9
   $ sudo systemctl status bind9
   
   # test
   $ nslookup mydomain.com 10.10.10.9
   $ nslookup wrcp.mydomain.com 10.10.10.9
   $ nslookup registry.mydomain.com 10.10.10.9