Horms
horms****@verge*****
2006年 11月 13日 (月) 13:28:42 JST
On Sat, Nov 11, 2006 at 05:06:04PM -0500, Larry Ludwig wrote: > Hi All, > > This is something I'm not clear about for setting up services on the load > balanced servers in a High Availability and Load Balancing instance: > > http://www.ultramonkey.org/3/topologies/hc-ha-lb-overview.html > > Let's use the apache service as an example. > > My question is do you setup the specific IP address (in the examples > 192.168.6.240) in the real server(s) apache config file to listen to that IP > address?? > > should I have in the httpd.conf file: > > Listen 192.168.6.240? > > This is something I'm not clear on > > I did try setting it to that but had odd results with my load balancing. > > thanks in advance.. The answer is, it depends. If you are using LVS-DR, as the advanced topologies including the example at the URL above do, then you need apache to listen to the VIP (192.168.6.240) _and_ you need to make sure that the real servers are not answering ARP for that address. Apache may also listen on other addresses, and that shouldn't be a problem. If on the other hand you were using LVS-NAT, as the standard topologies do, then you do not need apache to listen on the VIP (192.168.6.240). By the time a real server sees a conection the destination IP address will be that of the real server as listed in the ldirectord.cf. Again, Apache may also listen on other addresses, and that shouldn't be a problem. -- Horms H: http://www.vergenet.net/~horms/ W: http://www.valinux.co.jp/en/
