Adding Additional DNS Entries for the Nodes

When you set up the nodes, you can add three DNS entries for each node. Use the following steps to add additional DNS entries for each node.

Procedure

1. Login to the node and edit the following file:

   /etc/dnsmasq.conf
       
   

2. Add the DNS entries / nameservers with the complete list as shown in the following example:

   server=172.18.229.167
   server=172.18.129.161
   server=172.18.59.7
   server=8.8.8.8
   server=4.4.4.4
       
   

3. Change /etc/resolv.conf to use the local name server as follows:

    
   # chattr -i /etc/resolv.conf
   vi /etc/resolv.conf (or edit the file using any text editor)
       
   

   Remove the entries and add the following:

   nameserver 127.0.0.1
       
   

   Save the file and then run the following commands:

   # chattr +i /etc/resolv.conf
   # systemctl restart dnsmasq
       
   

4. Check /var/log/messages to verify that it has a list of all the nameservers as shown in the following example:

   Sep 16 15:35:01 [localhost] systemd: Stopped DNS caching server..
   Sep 16 15:35:01 [localhost] systemd: Started DNS caching server..
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: started, version 2.76 cachesize 150
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth no-DNSSEC loop-detect inotify
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 4.4.4.4#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 8.8.8.8#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 172.18.59.7#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 172.18.129.161#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 172.18.229.167#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: reading /etc/resolv.conf
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 4.4.4.4#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 8.8.8.8#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 172.18.59.7#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 172.18.129.161#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: using nameserver 172.18.229.167#53
   Sep 16 15:35:01 [localhost] dnsmasq[25930]: ignoring nameserver 127.0.0.1 - local interface