Mark Thomas wrote:
On 07/05/2010 23:20, Smith, Mark wrote:
-----Original Message-----
From: Pid [mailto:p...@pidster.com]
There are a couple of linux load balancer projects that might work, if
you can ditch HTTPD. E.g. www.linuxvirtualserver.org
We use LVS to balance load across our Apache layers already, so I'm quite
familiar with it.
It does do what I want here, except that there are several things we need from
Apache: Access control, SSL termination, URL path based routing, etc.
I considered using ipvsadm on the Apache box to route traffic to TomCats, but
there is another EC2 specific problem: All the routing methods LVS uses don't
work on EC2 because they _ONLY_ route TCP, UDP and ICMP:
- Direct Routing messes with Ethernet headers. Not a chance.
- Tunneling uses IP-in-IP tunneling, which is neither TCP, UDP nor ICMP. *grump*
- NAT gets blocked by the EC2 firewalls, which makes sense.
- I even tried setting up GRE tunnels; no love.
So, yeah. Thought of that already too. :-)
Anyone else have any ideas? So far, modifying /etc/hosts looks like the best
solution, even though it tips my kludge-o-meter past my comfort zone.
Take a look at mod_cluster from JBoss. I haven't looked at it for a
while but when I saw it at ApacheCon EU last year it looked like it
might be what you are looking for.
Also, modifying /etc/hosts may not be the panacea. I would imagine that
e.g. mod_jk instances do not do a name resolving call at each
transaction, and that they cache the result.
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