i THINK i might have a trick that can be helpful for some of your
configurations but i'm not sure. i'm explaining it here in case someone
out there wants to try this out.
on linux, you can enable ip forwarding with a simple command
# echo "1" > /proc/sys/net/ipv4/ip_forward
altering this value on your multi-homed frontend will cause it to forward
on ganglia multicast traffic to other interfaces.
if your configuration is like this
A
/ \
B C
b1 c1
b2 c2
.. ..
bn cn
if you enable ip forwarding on B and C AND the private IP space on cluster
b and c are different, then it might be possible to monitoring everything
from A.
if someone has the time to try this out, can you report on what you found?
we also need to be sensitive the security ramifications of ip forwarding.
http://www.linuxsecurity.com/articles/network_security_article-4528.html
hope it works.
-matt
