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Adding Additional DNS Entries for the Nodes

When you setup the nodes, you can add 3 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 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 x /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

Last modified: 3/22/2021 7:00:37 PM