Hi, I read the old threads regarding dnsmasq and high availability and would like to know if the following setup is possible or if I'm missing something.
Master: dnsmasq A (192.168.1.10) Slave: dnsmasq B (192.168.1.20) Loadbalancer virtual IP in ldirectord 192.168.1.30 The clients use the virtual IP 192.168.1.30 as their nameserver. Host A is a "normally" configured dnsmasq server which also offers DHCP. Host B is configured the same way like server A with addition of an iptables rule which blocks incoming DHCP-Requests. The configuration files + the DHCP leases file are on a shared (active-active) Cluster-FS available to A and B. ldirectord is configured with with one realserver (A) and one fallback server (B). In this configuration a connection to 192.168.1.30 will only lookup records from host A (as long as A is alive). When A goes down, the following will happen: 1) The fallback server B will be used when clients lookup records from 192.168.1.30 2) The loadbalancer will connect (through ldirectords "fallbackcommand" with the "start" parameter) via SSH to server B and remove the iptables rule which blocks incoming DHCP requests and will restart dnsmasq. Now server B is offering DHCP and DNS requests in the same way like server A was doing before. When server A gets online again the "fallbackcommand" on the loadbalancer is called again (this time with the "stop" parameter). It will now connect to server A and restart dnsmasq and to server B and set the iptables rule again to block incoming DHCP requests. Server B will become the fallback server again. What do you think? Warm regards, Tom _______________________________________________ Dnsmasq-discuss mailing list Dnsmasqemail@example.com http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss