Thanks so much. The realservers are on both a private and public net. Should I use their public IPs? I guess I will have to with DR because DR sends the stuff right back to them, correct? Also the realservers are Windows 2003. I know I can add a loopback device to them. Are there any good how tos about doing this?
-Don > Hi, > > On Wed, 2009-05-20 at 06:53 -0700, Don Steiny wrote: > >> I am doing DR and the ARP problem makes sense. The part I still don't >> understand is "I need a public and private VIP." The ISP I am using has >> assigned me some IP addresses. I know how to use ifconfig to put >> multiple addresses on an interface, that is no big deal, but what I >> can't figure out is how to decide what IP address to use for the VIP. >> > > Pick any public IP you have that's not being used for anything yet. You > say you have multiple IP addresses assigned to you by your ISP so that's > great. Use one for the IP that isn't already used. > > >> I >> have looked up VIP and found many explanations, including ones that tie >> it to lo, ones that say that it does not need to be tied to an interface >> (and I don't know how to do that). Unless it is one of the ones my ISP >> lets me use, then no one can get to me from the outside. I need to both >> configure the machine and use it from outside the data center. I have >> an IP address that I go into with ssh. If that is my RIP, then what >> address should my VIP be? Should I request an address from my ISP that >> I can use for the VIP and configure it on eth0? Do I get an address >> from the ISP and have them configure the router so people can get to it? >> > > Since you're going to use DR, you'll need to configure a loopback device > on your realservers (provided you're using a fairly recent kernel - see > the HOWTO for other solutions if this is not the case) that has the VIP > (the public yes, you're not using anything else on the director) > configured with a netmask of /32 and solve the arp problem (again look > in the HOWTO for methods per kernel) if they are running Linux. > > This way the packets destined for the VIP get handled by the director > and sent to one of the realservers configured in the LVS table. The > realserver gets the Link Layer packet, sees its destination (the VIP), > recognizes that it has that ip configured (the loopback device), handles > the request (eg. a http request) and sends the reply back to the > src_addr (the client). > > > _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
