Thanks Julian. One more question about bind 2 sockets. For UDP bind RIP and VIP, are they two different application? If yes, how to handle application works on RIP, but failed on VIP?
2016-12-10 23:34 GMT+08:00 Julian Anastasov <j...@ssi.bg>: > > Hello, > > On Sat, 10 Dec 2016, linbo liao wrote: > > > Hi, > > > > I want to setup an LVS-DR cluster using keepalived. It will load UDP > > packet to real server. Refer to > > http://kb.linuxvirtualserver.org/wiki/UDP_service_binding_ > issue_in_LVS/DR_and_LVS/TUN, > > UDP service in Real Server should be bind to VIP, but not to any > > address(0.0.0.0). > > > > If UDP service can't bind to any address in Real server, how Keepalived > to > > do healthy check? > > UDP application server can set the local address for > outgoing packets by using cmsg SOL_IP/IP_PKTINFO (ipi_spec_dst). > The used local address can be copied from the received request. > As result, binding to 0.0.0.0 should be possible. In any case, > listening to 0.0.0.0 and replying with correct local > address is a common problem for UDP servers and not > related to the fact that VIP is also configured on the > real server. If the UDP server does not use cmsg IP_PKTINFO > then the other solution is to bind 2 sockets, one to VIP > and another to RIP. > > Regards > > -- > Julian Anastasov <j...@ssi.bg> > > _______________________________________________ > Please read the documentation before posting - it's available at: > http://www.linuxvirtualserver.org/ > > LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org > Send requests to lvs-users-requ...@linuxvirtualserver.org > or go to http://lists.graemef.net/mailman/listinfo/lvs-users > _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
