FOLLOWUP:
After doing some more reading on this, I've discovered that the mcast_if
option has not as of yet been implemented in the udp_send_channel sectin,
but should work fine in the receive channel (which is what your most
concerned about anyway).
I also wanted to add a copy of this snippet from an official Ganglia
FAQ about a quirk with the mcast_if option:
How should I configure multihomed machines?
Here is an email that Matt Massie sent to a user having problems
with multihomed machines
i need to add a section in the documentation talking about this since
it
seems to be a common question.
when you use...
mcast_if eth1
.. in /etc/gmond.conf that tells gmond to send its data out the
"eth1"
network interface but that doesn't necessarily mean that the source
address of the packets will match the "eth1" interface. to make sure
that
data sent out eth1 has the correct source address run the
following...
% route add -host 239.2.11.71 dev eth1
... before starting gmond. that should do the trick for you.
-matt
> I have seen some post related to some issues
> with gmond + multicast running on a dual nic
> frontend.
>
> Currently I am experiencing a weird behavior
>
> I have the following setup:
>
> -----------------------
> | web server + gmetad |
> -----------------------
> |
> |
> |
> ----------------------
> | eth0 A.B.C.112 |
> | |
> | Frontend + gmond |
> | |
> | eth1 192.168.100.1 |
> ----------------------
> |
> |
>
> 26 nodes each
> gmond
>
> In the frontend /etc/gmond.conf I have the
> following statement: mcast_if eth1
>
> The 26 nodes are correctly reported.
>
> However the Frontend is never reported.
>
> I am running iptables on the Frontend, and I am seing
> things like:
>
> INPUT packet died: IN=eth1 OUT= MAC= SRC=A.B.C.112 DST=239.2.11.71
> LEN=36 TOS=0x00 PREC=0x00 TTL=1 ID=53740 DF PROTO=UDP SPT=41608
DPT=8649
> LEN=16
>
> I would have expected the source to be 192.168.100.1 with mcast_if
eth1
>
> Any idea ?
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Milo
Sent: Thursday, June 21, 2007 4:36 PM
To: oscar-users@lists.sourceforge.net
Subject: Re: [Oscar-users] Gangila Set up Fail in Test Cluster Setup
I also had issues with Ganglia only seeing my head node once I updated my
gmetad and gmond packages to the latest versions. Running the post_install
script didn't help reconfigure everything correctly at all. The head node
was running on 2 network cards (1 for WAN access, and 1 connected to the
internal compute node network), and for some reason gmetad was listening on
the wrong interface, hence the reason it was only picking up meta-data from
itself but not the compute nodes on the second interface. After some
searching, I found that you can add an option in your gmond.conf file to
explicitly specify which interface your daemon is listening/sending on.
Snippet from my gmond.conf file:
udp_send_channel {
mcast_if = eth1 <===============THIS OPTION
mcast_join = 239.2.11.71
port = 8649
ttl = 1
}
udp_recv_channel {
mcast_if = eth1 <============= THIS OPTION
mcast_join = 239.2.11.71
port = 8649
bind = 239.2.11.71
}
-Milo
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Chaw Thet
Zan
Sent: Thursday, June 21, 2007 10:52 AM
To: oscar-users@lists.sourceforge.net
Subject: Re: [Oscar-users] Gangila Set up Fail in Test Cluster Setup
Hi,
I do the steps you point out. But Ganglia Setup Test fail in the Test
Cluster Setup.
But I can see sometime all nodes in http://localhost/ganglia. I can't
see sometime all nodes in this page. I see only one node.
I don't think how to solve that problem.
when I reboot the clients node, I see the 2 errors :
(1) Set up Postfix fail
(2)Set up NTP fail
How can I fix these problem? Are these problems relate to Ganglia fail?
Thank you so much for your patience attention.
chawthetzan
On 6/19/07, Michael Edwards <[EMAIL PROTECTED]> wrote:
> ssh to the oscarnode1 and run "ps -ef | grep gmond". That will tell
> you if the ganglia monitor daemon is running on the node.
>
> if it returns nothing try running "/etc/init.d/gmond restart" on
> oscarnode1 and see if that fixes the problem.
>
> Also, make sure you have the firewall and SE Linux on the head node turned
> off.
>
> On 6/19/07, Chaw Thet Zan <[EMAIL PROTECTED]> wrote:
> > Hi
> > In my http://localhost/ganglia, I can't see only one node that is
> > server(cluster node manager). I can't see the node "oscarnode1" that
> > is created as client on the "cls" image. How can I solve these
> > problem? Error is the same as the attached file (ganglia.err) I have
> > already sent.
> > All test are passed except Ganglia Setup Test.
> > Please give me advice how can I do it?
> > Best regards,
> > ctz
> >
> >
> > On 6/17/07, Michael Edwards <[EMAIL PROTECTED]> wrote:
> > > Go to http://localhost/ganglia. If you can see all your nodes there,
> > > its not really a problem.
> > >
> > > The ganglia test fails on occasion when everything is actually
working.
> > >
> > > On 6/12/07, Chaw Thet Zan <[EMAIL PROTECTED]> wrote:
> > > > Dear,
> > > > When I ran "Test Cluster Setup ", all are passed except Gangila
Setup.
> > > > How do I solve this Gangila fail? I checked the
> > > > /home/oscartst/gangila/gangila.err but I don't understand clearly.
> > > > OS is RedHat Enterprise Linux 4 AS
> > > > Oscar version is 5.0
> > > > I created one image called "cls" and I added one client oscarnode1.
> > > > Do I need to create one client image to add one client? I don't
> > > > understand it clearly.
> > > > Please .. Can you solve this problem?
> > > >
> > > > Best regards,
> > > > ctz
> > > >
> > > >
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