Good morning,
Apologies for the simple question. I've got a simple cluster
with a master node and one compute node. I installed the
latest Ganglia on the master node (3.4.0) - libganglia,
ganglia-gmond, ganglia-metad, ganglia-web (3.5.1). I can
use ganglia-web to "see" the master node with no problems.
I'm using Warewulf for the compute node and I installed
libganglia and ganglia-gmond in the VNFS and rebooted the
node. When the node comes back up, I tested ganglia via
"gstat -all" on the compute node and it seems to work
correctly.
However, ganglia-web doesn't display anything for the compute
node even though I've added it to the data_source line in
gmetad.conf:
data_source "my cluster" 10.1.0.250 10.1.0.1:8649 <http://10.1.0.1:8649>
I also checked if the master node could access the data from
the compute node via "gstat -all" and I only get data from the
master node (i.e. no compute node).
I checked the Ethernet interfaces on both nodes and both
are listed as MULTICAST. iptabbles on the master node and the
compute node are off and the services are not running (checked
that 3 times).
There is a simple Netgear GigE switch between the nodes
(unmanaged). I don't think that's a problem.
One thing I think is interesting is that the master node has
eth0 with an IP of 192.168.1.250 which is to the outside world
and eth1 is 10.1.0.250 which is the cluster network. The compute
node has eth0 as 10.1.0.1. But when I go to http://localhost/ganglia
I can only access the master node as 192.168.1.250, not
10.1.0.250 (i.e. the list of nodes is only 192.168.1.250).
Otherwise i can login into the compute node, ping it, etc. It works
fine but somehow I'm missing a configuration piece for ganglia.
TIA!
Jeff
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