Re: [Ganglia-general] Need help configuring clusters to use separate multicast IP
Ron,
You will probably want to configure it to check more than 1 machine per
cluster. That way if that machine is the one that goes down you don't
lose visibility into the whole cluster.
So here's an example I pulled from our gmetad server (changed the
hostnames of course):
data_source Application Servers app1
data_source Databases db1
data_source ETL etl1
data_source Elastic Search Cluster elasticsearch1 elasticsearch2
data_source Research Cluster admin1 admin2
gridname Mozilla Metrics
I should note that each data source is on different multicast channels,
but we always use the default port (8649) for gmond.
Hopefully this helps!
Cheers,
-Xavier
On 3/23/11 8:12 AM, Ron Cavallo wrote:
I see. So I need a separate IP AND A SEPARATE PORT. Got it.
Also, I use a single gmond in each cluster to aggregate the single
cluster. I configure the gmetad to talk to only gmond from each cluster.
Is that wrong?
-RC
Ron Cavallo
Sr. Director, Infrastructure
Saks Fifth Avenue / Saks Direct
12 East 49th Street
New York, NY 10017
212-451-3807 (O)
212-940-5079 (fax)
646-315-0119(C)
www.saks.com
-Original Message-
From: Seth Graham [mailto:set...@fnal.gov]
Sent: Wednesday, March 23, 2011 11:06 AM
To: Ron Cavallo
Cc: Bernard Li; ganglia-general@lists.sourceforge.net
Subject: Re: [Ganglia-general] Need help configuring clusters to use
separate multicast IP
That might work, but I don't think anyone sets up their ganglia so that
a single gmond is trying aggregate all clusters. That's what the gmetad
daemon is for.
Also note that even though you have a separate multicast address for
each cluster, the port still has to be unique. The port is what gmetad
and the web frontend use to distinguish between clusters. You get really
weird results if multiple data_source lines use the same port.
An ideal configuration might be:
Each of the 5 clusters has a unique gmond.conf, with its own multicast
address and port number.
The gmetad host has 5 data_source lines to query one host from each of
the 5 clusters.
On Mar 23, 2011, at 9:52 AM, Ron Cavallo wrote:
I need some help. I am trying to configure my gmetad to collect from
different clusters on different IP's. I have 5 clusters. This is my
gmetad collections server's local gmond.conf configuration:
/* 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 = 239.2.11.72
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
}
udp_recv_channel {
mcast_join = 239.2.11.72
port = 8649
bind = 239.2.11.72
}
udp_recv_channel {
mcast_join = 239.2.11.73
port = 8649
bind = 239.2.11.73
}
udp_recv_channel {
mcast_join = 239.2.11.74
port = 8649
bind = 239.2.11.74
}
udp_recv_channel {
mcast_join = 239.2.11.75
port = 8649
bind = 239.2.11.75
}
udp_recv_channel {
port = 8649
}
This is an excerpt from ONE OF THE CLUSTERS ABOVE (the .74 cluster)
/* 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 = 239.2.11.74
port = 8649
ttl = 1
}
/* You can specify as many udp_recv_channels as you like as well. */
udp_recv_channel {
mcast_join = 239.2.11.74
port = 8649
bind = 239.2.11.74
}
I configure only one server in a cluster to be polled from the gmetad
since that server has all of the cluster members information in it
anyway. Here is how I have it configured to talk to the one gmond
shown
directly above:
data_source SaksGoldApps 45 sd1mzp01lx.saksdirect.com:8649
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Re: [Ganglia-general] Need help configuring clusters to use separate multicast IP
Hey Ron,
Your gmond on the gmetad server shouldn't have anything special in it.
It should just be like any other gmond. Ours gmetad runs on one of the
Application Servers so the gmond.conf on that machine would look the
same as below. If your gmetad server is on its own you could set it up
with a basic non-multicast gmond setup.
So here's the relevant sections from gmond.conf:
cluster {
name = Application Servers
owner = Mozilla Metrics
}
/* Feel free to specify as many udp_send_channels as you like. Gmond
used to only support having a single channel */
udp_send_channel {
bind_hostname = yes # Highly recommended, soon to be default.
# This option tells gmond to use a source address
# that resolves to the machine's hostname. Without
# this, the metrics may appear to come from any
# interface and the DNS names associated with
# those IPs will be used to create the RRDs.
mcast_join = 239.2.11.76
mcast_if = eth0
port = 8649
ttl = 1
}
/* You can specify as many udp_recv_channels as you like as well. */
udp_recv_channel {
mcast_join = 239.2.11.76
port = 8649
bind = 239.2.11.76
}
/* You can specify as many tcp_accept_channels as you like to share
an xml description of the state of the cluster */
tcp_accept_channel {
port = 8649
}
On 3/23/11 8:51 AM, Ron Cavallo wrote:
Thank you Xavier.
Can you give me an example of the gmond.conf that is located on the
cluster Application Servers?
Are there any changes needed in the gmond.conf on the gmetad server to
allow Application Servers to be collected?
I think we are getting closer to my problem... thanks all for the help.
Ron Cavallo
Sr. Director, Infrastructure
Saks Fifth Avenue / Saks Direct
12 East 49th Street
New York, NY 10017
212-451-3807 (O)
212-940-5079 (fax)
646-315-0119(C)
www.saks.com
-Original Message-
From: Xavier Stevens [mailto:xstev...@mozilla.com]
Sent: Wednesday, March 23, 2011 11:25 AM
To: ganglia-general@lists.sourceforge.net
Subject: Re: [Ganglia-general] Need help configuring clusters to use
separate multicast IP
Ron,
You will probably want to configure it to check more than 1 machine per
cluster. That way if that machine is the one that goes down you don't
lose visibility into the whole cluster.
So here's an example I pulled from our gmetad server (changed the
hostnames of course):
data_source Application Servers app1
data_source Databases db1
data_source ETL etl1
data_source Elastic Search Cluster elasticsearch1 elasticsearch2
data_source Research Cluster admin1 admin2
gridname Mozilla Metrics
I should note that each data source is on different multicast channels,
but we always use the default port (8649) for gmond.
Hopefully this helps!
Cheers,
-Xavier
On 3/23/11 8:12 AM, Ron Cavallo wrote:
I see. So I need a separate IP AND A SEPARATE PORT. Got it.
Also, I use a single gmond in each cluster to aggregate the single
cluster. I configure the gmetad to talk to only gmond from each
cluster.
Is that wrong?
-RC
Ron Cavallo
Sr. Director, Infrastructure
Saks Fifth Avenue / Saks Direct
12 East 49th Street
New York, NY 10017
212-451-3807 (O)
212-940-5079 (fax)
646-315-0119(C)
www.saks.com
-Original Message-
From: Seth Graham [mailto:set...@fnal.gov]
Sent: Wednesday, March 23, 2011 11:06 AM
To: Ron Cavallo
Cc: Bernard Li; ganglia-general@lists.sourceforge.net
Subject: Re: [Ganglia-general] Need help configuring clusters to use
separate multicast IP
That might work, but I don't think anyone sets up their ganglia so
that
a single gmond is trying aggregate all clusters. That's what the
gmetad
daemon is for.
Also note that even though you have a separate multicast address for
each cluster, the port still has to be unique. The port is what gmetad
and the web frontend use to distinguish between clusters. You get
really
weird results if multiple data_source lines use the same port.
An ideal configuration might be:
Each of the 5 clusters has a unique gmond.conf, with its own multicast
address and port number.
The gmetad host has 5 data_source lines to query one host from each of
the 5 clusters.
On Mar 23, 2011, at 9:52 AM, Ron Cavallo wrote:
I need some help. I am trying to configure my gmetad to collect from
different clusters on different IP's. I have 5 clusters. This is my
gmetad collections server's local gmond.conf configuration:
/* 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 = 239.2.11.72
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
}
udp_recv_channel {
mcast_join = 239.2.11.72
port = 8649
bind = 239.2.11.72
[Ganglia-general] Network Module
Does the network module support tracking dropped packets? If so, what do I need to add to my gmond.conf. Also does Ganglia support a time resolution (for dropdown menu) less than 1 hour? Thanks, -Xavier -- ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo ___ Ganglia-general mailing list Ganglia-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-general
