On Fri, Nov 28, 2008 at 10:59:41AM +0200, Johann Spies wrote:
>
> /usr/local/sbin/gmond -t > /etc/ganglia/gmond.conf
presume you restarted gmond after changing the configuration
> sudo gstat -a
> CLUSTER INFORMATION
> Name: unspecified
> Hosts: 1
> Gexec Hosts: 0
> Dead Hosts: 0
> Localtime: Fri Nov 28 10:55:13 2008
>
> CLUSTER HOSTS
> Hostname LOAD CPU
> Gexec
> CPUs (Procs/Total) [ 1, 5, 15min] [ User, Nice, System,
> Idle, Wio]
>
> head001.sun.ac.za
> 4 ( 1/ 293) [ 0.94, 0.56, 0.76] [ 24.9, 0.0, 0.7,
> 73.2, 1.3] OFF
>
> With no information from comp001-comp021 although gmond is running on
> each one of them.
if iptables is off in all of them and they are all (including head001) in the
same network
segment, then you have a network problem.
# tcpdump host 239.2.11.71
should show you are getting multicast messages from all the nodes, but
probably only shows packets from head001 instead.
> The reason for my previous mail was that the person described a
> solution in his/her situation using monocasting and not multicasting.
> I suspect multicasting is not working on my system.
to change to unicast what you have to do is change the configuration
from :
/* Feel free to specify as many udp_send_channels as you like. Gmond
used to only support having a single channel */
udp_send_channel {
mcast_join = 239.2.11.71
port = 8649
ttl = 1
}
/* You can specify as many udp_recv_channels as you like as well. */
udp_recv_channel {
mcast_join = 239.2.11.71
port = 8649
bind = 239.2.11.71
}
into (assuming all your nodes can resolve that name, otherwise use the ip)
udp_send_channel {
host = head001.sun.ac.za
port = 8649
}
udp_recv_channel {
port = 8649
}
then restart all your gmond with the new configuration (presume iptables
is disabled in all the other nodes as well)
Carlo
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