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Posted to users@httpd.apache.org by Adam Martin <Ad...@infor.com> on 2008/04/30 20:17:09 UTC
[users@httpd] High availability concept question
If I load balance between two 2.2 Apache HTTP Servers on two separate
physical servers, what type of device or software can I place in front
of the web servers to allow users to access either web server via one IP
Address? I did a quick search in the documentation but wasn't sure what
to look for. Would it be as simple as pointing the users to a router
configured with some type of forwarding? How do I prevent this device
from becoming a single point of failure? I know these questions are not
Apache specific, at least I don't think they, but after being a member
of this list for a couple of months and seeing the level of expertise on
this board I figured someone could point me in the right direction. I
am not asking for a how-to response, just concepts on where to start to
start looking or which documentation I should look at. Thanks.
RE: [users@httpd] High availability concept question
Posted by Adam Martin <Ad...@infor.com>.
Guy and Jet, thank you for taking the time to respond. I appreciate it.
-----Original Message-----
From: Guy Waugh [mailto:gwaugh@scu.edu.au]
Sent: Wednesday, April 30, 2008 6:51 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] High availability concept question
Adam Martin wrote:
> If I load balance between two 2.2 Apache HTTP Servers on two separate
> physical servers, what type of device or software can I place in front
> of the web servers to allow users to access either web server via one
IP
> Address? I did a quick search in the documentation but wasn't sure
what
> to look for. Would it be as simple as pointing the users to a router
> configured with some type of forwarding? How do I prevent this device
> from becoming a single point of failure? I know these questions are
not
> Apache specific, at least I don't think they, but after being a member
> of this list for a couple of months and seeing the level of expertise
on
> this board I figured someone could point me in the right direction. I
> am not asking for a how-to response, just concepts on where to start
to
> start looking or which documentation I should look at. Thanks.
One (open source) solution would be to use an LVS load balancing server
(http://www.linuxvirtualserver.org) to do the load balancing. If you
want high availability (no single point of failure in the load balancer)
couple LVS with heartbeat (http://www.linux-ha.org), so that if your
active load balancer fails, the inactive load balancer takes over.
There is a learning curve with both those technologies, so if you don't
have much time (or even if you do), it might be worth a visit to
http://www.ultramonkey.org, Simon Horman's project site, in which he
supplies prebuilt packages to combine LVS and heartbeat together.
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Re: [users@httpd] High availability concept question
Posted by Guy Waugh <gw...@scu.edu.au>.
Adam Martin wrote:
> If I load balance between two 2.2 Apache HTTP Servers on two separate
> physical servers, what type of device or software can I place in front
> of the web servers to allow users to access either web server via one IP
> Address? I did a quick search in the documentation but wasn’t sure what
> to look for. Would it be as simple as pointing the users to a router
> configured with some type of forwarding? How do I prevent this device
> from becoming a single point of failure? I know these questions are not
> Apache specific, at least I don’t think they, but after being a member
> of this list for a couple of months and seeing the level of expertise on
> this board I figured someone could point me in the right direction. I
> am not asking for a how-to response, just concepts on where to start to
> start looking or which documentation I should look at. Thanks.
One (open source) solution would be to use an LVS load balancing server
(http://www.linuxvirtualserver.org) to do the load balancing. If you
want high availability (no single point of failure in the load balancer)
couple LVS with heartbeat (http://www.linux-ha.org), so that if your
active load balancer fails, the inactive load balancer takes over.
There is a learning curve with both those technologies, so if you don't
have much time (or even if you do), it might be worth a visit to
http://www.ultramonkey.org, Simon Horman's project site, in which he
supplies prebuilt packages to combine LVS and heartbeat together.
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
RE: [users@httpd] High availability concept question
Posted by "Wilda, Jet" <Je...@ChasePaymentech.com>.
We use F5 BIG-IP LTM
http://www.f5.com/products/big-ip/product-modules/local-traffic-manager.
html though there are many options including the open source pound
http://www.apsis.ch/pound/.
Enjoy,
~Jet
________________________________
From: Adam Martin [mailto:Adam.Martin@infor.com]
Sent: Wednesday, April 30, 2008 2:17 PM
To: users@httpd.apache.org
Subject: [users@httpd] High availability concept question
If I load balance between two 2.2 Apache HTTP Servers on two separate
physical servers, what type of device or software can I place in front
of the web servers to allow users to access either web server via one IP
Address? I did a quick search in the documentation but wasn't sure what
to look for. Would it be as simple as pointing the users to a router
configured with some type of forwarding? How do I prevent this device
from becoming a single point of failure? I know these questions are not
Apache specific, at least I don't think they, but after being a member
of this list for a couple of months and seeing the level of expertise on
this board I figured someone could point me in the right direction. I
am not asking for a how-to response, just concepts on where to start to
start looking or which documentation I should look at. Thanks.
----------
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