You are correct.
If gmond still isn't reporting on sFlow, the other thing to check is your
firewall. tcpdump sees packets before the firewall so seeing the sFlow
packets in tcpdump confirms that the packets are arriving at the server,
but it doesn't necessarily mean that gmond is able to receive them. You may
need to add a rule to iptables accepting incoming packets to UDP port 6343.
To test if the problem is firewall related, you can temporarily disable the
firewall with the command:
/sbin/service iptables stop
On Dec 15, 2010 9:28am, giovanni de rosa <[email protected]> wrote:
thanks a lot. I'm not an expert so sorry if i say nonsense. If i
undestand correctly i have to download everything is in:
https://ganglia.svn.sourceforge.net/svnroot/ganglia/trunk/monitor-core/
than adding in the configuration file the rcv channel for sflow and then
rebulding all. Is this right?
thanks
Date: Wed, 15 Dec 2010 09:01:56 -0800
Subject: Re: [Ganglia-general] Ganglia and sFlow
From: [email protected]
To: [email protected]
CC: [email protected]
The patch is obsolete, the sFlow code has been checked into the
development branch (trunk).
To build Ganglia with sFlow support you need to download the latest
sources from Sourceforge:
svn co https://ganglia.svn.sourceforge.net/svnroot/ganglia ganglia
Peter
On Wed, Dec 15, 2010 at 3:46 AM, Giovanni De Rosa [email protected]>
wrote:
Hi,
i think there is something wrong beacuse i only see the host on with is
installed gmond in the ganglia web page.
i checked if sflow send to the host with gmond the packets and it does (i
used tcpdump udp port 6343).
To pach gmond for the use of sFlow i used this
http://bugzilla.ganglia.info/cgi-bin/bugzilla/show_bug.cgi?id=276
What can i do?
thanks a lot
Giovanni
From: Peter Phaal
Sent: Tuesday, December 07, 2010 6:34 PM
To: Giovanni De Rosa
Cc: [email protected]
Subject: Re: [Ganglia-general] Ganglia and sFlow
The following article provides additional information on configuring the
Ganglia development branch (trunk) to collect sFlow:
http://blog.sflow.com/2010/10/ganglia.html
Installing and configuring Host sFlow agents to send sFlow from Linux and
Windows platforms is described in the articles:
http://blog.sflow.com/2010/10/installing-host-sflow-on-linux-server.html
http://blog.sflow.com/2010/10/installing-host-sflow-on-windows-server.html
sFlow is sent from the Host sFlow agents to the Ganglia gmond collector
as unicast UDP messages to port 6343. You need to make sure that each
Host sFlow agent is configured to send to the IP address of the server
that gmond is installed on (the configuration details are in the articles
above). If you are still having problems then check that there are no
firewalls blocking the traffic. The IP tables filters on the the
collector and agents and well as any intermediate firewalls must be
configured allow UDP port 6343 traffic to pass.
You can confirm that sFlow is being received at the gmond server by
running the following tcpdump command:
tcpdump udp port 6343
Please let me know if you have any difficulties.
Peter
On Tue, Dec 7, 2010 at 1:19 AM, Giovanni De Rosa [email protected]>
wrote:
hi,
i'm trying to use ganglia with sFlow. I have installed gmond patched for
using sFlow on a host and installed the sFlow agent onto a different
host. The problem is that it seems to me that never is changed (the xml
of gmond seems the same). How can i anderstand that all is working
right??? the sFlow angent run well and send to the host on with is
installed gmond the packets.....
thanks a lot
Giovanni
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