[OPEN-ILS-GENERAL] Ldirector Setup

[Bill Ott]

On 05/02/2012 10:16 AM, Martha Driscoll wrote:
> In the interest of starting some sysadmin discussion, I'm looking for 
> some help on setting up a load balancer.
>
> I'm trying to get ldirector setup to load balance four bricks.  I 
> think I'm trying to do something a bit unusual in that I'm only using 
> one load balancer.  I'm not using heartbeat, but the man page for 
> ldirector says 'ldirectord typically is started from heartbeat but can 
> also be run from the command line'.  I can start it, but I'm not 
> getting redirected to my apache brick heads.
>
> Does anyone have any good resources on setting up ldirector?  Has 
> anyone set it up on only one load balancer?

Not with Evergreen, but yes, I've used a single LVS host.  I don't have 
a specific resource, and some quick Googling didn't turn up what I 
remember using when I got started.

 From your notes, the ipvsadm output displayed suggests that the Apache 
hosts are listening, at least on their local addresses.

When you say you're not getting redirected.  Have you verified that with 
something like: tcpdump port 80
Have you verified that they are also listening for traffic on the 
virtual address?  (172.29.120.84:80  or  *:80)

If the tcpdump doesn't see any traffic arriving, then it's likely a 
problem with the ldirectord host.  If it is, then you've likely got an 
Apache, or network issue on the web servers.