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Greetings,
I've been attempting to get 'ganglia-3.1.7' 'gmond' working correctly on
a Nexenta NCP 3.0.1 host, having compiled matters from source.
The scenario is that the Nexenta hosts's 'gmond' would multi-cast to our
collector 'gmond' on another host. This collector host already correctly
receives 'gmond' multicast traffic from several other machines.
The Nexenta machine's 'gmond.conf' contains the following:
udp_send_channel {
bind_hostname = yes
mcast_join = 239.aa.bb.cc
mcast_if = aggr3
port = 8649
ttl = 1
}
udp_recv_channel {
mcast_join = 239.aa.bb.cc
mcast_if = aggr3
port = 8649
bind = 239.aa.bb.cc
}
tcp_accept_channel {
bind = 10.xx.yy.zz
port = 8649
}
Now if the on Collector host if I try:
nc 10.xx.yy.zz 8649
then all seems well: I get plenty of sensible data back, e.g. grepping
out 'GMOND_STARTED':
<!ATTLIST HOST GMOND_STARTED CDATA #IMPLIED>
<HOST NAME="nxxx.xxx.xxx" IP="10.xx.yy.zz" REPORTED="1303917141"
TN="19" TMAX="20" DMAX="0" LOCATION="xxxx" GMOND_STARTED="1303917141">
I've verified that multicast traffic is passing between the two hosts,
by 'snoop'-ing and 'tcpdump'-ing.
However the *multicast* packets received by the Collector from the
Nexenta machine seem to be incorrect or deficient:
nc 127.0.0.1 8651 | less
[...]
<HOST NAME="nxxx.xxx.xxx" IP="10.xx.yy.zz" REPORTED="1303917322"
TN="15" TMAX="20" DMAX="0" LOCATION="unspecified" GMOND_STARTED="0">
</HOST>
[...]
There are never any METRICs reported for the Nexenta host, and of course
the graphs are broken with 'gmond_started' stuck at the beginning of the
epoch!
I've tried twiddling the 'udp_send_channel/udp_recv_channel' options,
running at debug level 99, 'truss'-ing, etc, but have to admit that I'm
stuck now: I'd be grateful if someone could suggest a way forward!
Thanks in advance,
Best Regards
[NG]
- --
N.J. Gresham
Unix Systems Administrator
Faculty of Life Sciences
University of Manchester
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