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How to update DNS server information

  • Updated
  • Products: FlashGrid Cluster on Azure
  • Products: FlashGrid Cluster on GCP
  • Products: FlashGrid Server on AWS
  • Products: FlashGrid Cluster on AWS
  • Products: FlashGrid Server on Azure

To update the DNS servers used in the configuration, run the following commands (in a cluster, run on each node).

Note: This procedure can be performed online. Do not change the nameserver defined in /etc/resolv.conf (127.0.0.1)

  1. Remove immutable attribute for /etc/dnsmasq.conf file
# chattr -i /etc/dnsmasq.conf
  1. Edit /etc/dnsmasq.conf file and change/add additional DNS servers by adding new lines server=
...
server=IP_DNS_server_1
server=IP_DNS_server_2
...
  1. Restart the dnsmasq service
# systemctl restart dnsmasq
  1. Check if dnsmasq service is running after the change:
# systemctl status dnsmasq

  1. Check if new nameserver(s) are working by performing several name lookups

  2. Add the immutable attribute for /etc/dnsmasq.conf

# chattr +i /etc/dnsmasq.conf