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tweeks200
Asked: 2016-06-01 08:07:15 +0800 CST

HAProxy/Keepalived and DNS

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We have some HAProxy/keepalived clusters on CentOS7 and found that the virtual IPs managed with keepalived have registered in DNS. Does anyone know of a way to block dns registration for address registered with keepalived or to block DNS registration for an interface (while leaving DHCP on)?

linux centos linux-networking keepalived

1 Answers

  1. Best Answer

    Probably your CentOS servers are sending the hostname to the DHCP server and this is updating the DNS. One way to disable it is using nmcli (use ipv6.dhcp-send-hosname if you are using IPv6):

    nmcli c m "System eth0" ipv4.dhcp-send-hostname no

    You must set that configuration for all the connections (you can list them with nmcli c s -a).

    I believe that should solve your issue but if you are still having the problem, could you please provide more information about the DHCP server?

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