On Fri, 29 Apr 2011 18:39:09 -0400, Christopher Schultz wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Felix,
On 4/28/2011 12:44 PM, Felix Schumacher wrote:
"Christopher Schultz" <ch...@christopherschultz.net> schrieb:
Felix and Guillaume,
I think you guys are working too hard for this. Isn't it as simple
as
using a redirect from each worker to the other, with no clustering
or
anything like that? You don't even need to set jvmRoute, etc. since
there's no cluster.
If you are willing to run all webapps on both servers, you are
right.
But the original requirement was to have one set of webapps on one
server and one set on the other, with failover in case of downtime
of either one.
Failover is not possible unless the target webapp is running on the
hot
spare, so... ??!
Right, the webapps are running on both servers at the same time, but
only
one set of apps will be served the requests on each tomcat.
The original req, as I understood it:
tomcat1
\-- /abc* (active)
|-- /def* (passive)
tomcat2
\-- /abc* (passive)
|-- /def* (active)
If one of those tomcat servers shuts down, the other one should be used
as failover.
The passive webapps should not be used in normal operations, because of
memory constraints.
It was allowed to use them in case of emergency, to have some more time
to respond.
Thus you will have to define a cluster - or rather two clusters -, if
you are using
mod_jk, as failover and load-balancing are only possible within a
cluster.
Two clusters are needed for each webapp group abc* and def*, since the
workers can not
be in active and passive state at the same time.
Do you think it could be made easier with mod_jk but use two clusters?
It might be easier to set this up using mod_proxy_ajp, but I haven't
used it yet. But
looking at the docs
http://httpd.apache.org/docs/2.2/mod/mod_proxy.html, it might look
like this:
# WARNING: I haven't tested this!
ProxyPass / balancer://abc/
<Proxy balancer://abc>
BalancerMember ajp://localhost:9001 loadfactor=1
# The below is the hot standby
BalancerMember ajp://localhost:9002 status=+H
</Proxy>
ProxyPass / balancer://def/
<Proxy balancer://def>
BalancerMember ajp://localhost:9002 loadfactor=1
# The below is the hot standby
BalancerMember ajp://localhost:9001 status=+H
</Proxy>
Bye
Felix
- -chris
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iEYEARECAAYFAk27Pg0ACgkQ9CaO5/Lv0PBVVACgsmEx4G7z1KIp2a3LOJqO9goX
RiMAniDmizGLLHpw2vJ1ghcwBVCe4AJ9
=YnDs
-----END PGP SIGNATURE-----
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
