[Dnsmasq-discuss] dnsmasq with high availability and dynamic range

[Goswin von Brederlow]

Hi,


I've been using dnsmasq running on 2 headnodes for a cluster with high 
availability for some time with static dhcp-host entries. So far this 
runs in an active/active setup, meaning dnsmasq runs on both headnodes 
all the time. Hosts then get answers from both servers but since the IPs 
are assigned based on the MAC using the same config there never has been 
any conflict between the two dnsmasq instances.


Now I'm adding a dynamic range to the setup for hosts that haven't been 
registered yet and there I forsee problems if both servers assign the 
same IP to different hosts.


Is there some support in dnsmasq for HA that I'm not seeing where the 2 
instances of dnsmasq would coordinate their leases in some way that I'm 
not seeing? Or should I simply split the dynamic IP range between the 
servers so they don't overlap? Are there other options or 
recommendations for a high availability setup for dnsmasq?


MfG

Goswin