understanding lvs

[Adrian Chapela]

Joseph Mack NA3T escribió:
> On Tue, 20 Mar 2007, webbezcom wrote:
> < silence>
>
>
>> Everything can be balanced between real servers not just httpd?
>
> the services that we know to work are in the HOWTO. In principle any 
> single port service can be balanced by LVS.
I'am balancing DNS, smtp, pop3, http and a propietary UDP service.
>
>> Are the linux directors actually physically servers?
>
> they are not servers. They are routers with a slightly unusual set of 
> rules. Clients do not connect to services on the director.
>
>> If so what server
>> requirements would I need for the directors?
>
> read the performance section.
>
I'am using one master and one backup. The servers are PIV 2,8 Ghz 512 MB 
memory. With this I'am balancing  3 UDP servers, 2 HTTP servers, 2 POP3, 
2 smtp and 2 DNS servers.

The connections are moderate in TCP. In UDP I have about 2500 
connections per second.
>> What about securities, if one server gets hacked will the hacker have 
>> access
>> to all servers?
>
> quite likely. Read the security section.
>
>> Can ultramonkey accommodate third layer topology? Having a central 
>> storage
>> server?
>
> Yes
>
> Ultramonkey is a wrapper around LVS.
>
> Joe
I use Keepalived for this....