gossimon-users

[Gossimon-users] infod.map file and ports used

[Andrew H. <har...@ya...>]

gossimon seems to be just what I am looking for, but have some questions:

1. Why does the infod.map file insist on have 127.0.0.1 address present?
   In a cluster, how is "localhost" useful info?

2. Am trying to use this on two machines in a cluster. My infod.conf looks like this, on both machines:

#
# NOTE: This file must be the same on all machines in the cluster!
#
# NOTE: 127.0.0.1 is required
1 127.0.0.1 1
2 10.0.0.5 1
3 10.0.0.7 1

There's no firewall and other cluster software I am running between the two machines (e.g. gluster, heartbeat and cassandra) all work

Running infod-client -h 10.0.0.5 or infod-client -h 10.0.0.7 produces same result: says there are 3 machines in the cluster and that onlu "localhost" is alive

3. In addition to the port 8000 mentioned in the documentation and config file, when infod is running it also seems to use two other ports (partial output from nmap below):

12000/tcp open  cce4x
16000/tcp open  unknown

Is this right and, if so, shouldn't it be mentioned in the documentation?

Thanks




      

Re: [Gossimon-users] infod.map file and ports used

[lior a. <lio...@gm...>]

Hi Andrew,

On Tue, Dec 7, 2010 at 12:19 PM, Andrew Hardie <har...@ya...> wrote:
> gossimon seems to be just what I am looking for, but have some questions:
Excellent, please send us any feedback you have so we can continue and
improve it.

>
> 1. Why does the infod.map file insist on have 127.0.0.1 address present?
>   In a cluster, how is "localhost" useful info?
>

The infod.map file contains 127.0.0.1 only so infod will work by
default after installing
from rpms or debs.

Basically is should not contain 127.0.0.1 after you configure it to
contain your cluster nodes.

> 2. Am trying to use this on two machines in a cluster. My infod.conf looks like this, on both machines:
>
> #
> # NOTE: This file must be the same on all machines in the cluster!
> #
> # NOTE: 127.0.0.1 is required
> 1 127.0.0.1 1
> 2 10.0.0.5 1
> 3 10.0.0.7 1

In this case if you have 2 machines then your infod.map should be:
 1 10.0.0.5 1
 2 10.0.0.7 1

The numbers in the first column simply set the node id for each node
(so in this case you have node 1 and node 2)

Also, i recommend to edit the file /etc/default/infod
and make sure you have the line:
INFOD_NIC="eth0"
(or the any other NIC you use like eth1, ib0, etc ...)

The default file contains INFOD_NIC="lo" as the interface to listen to.
This is again so a default install will work on a single node.

Once you update your /etc/gossimon/infod.map and /etc/default/infod
files make sure all cluster nodes have the updated
files.

> There's no firewall and other cluster software I am running between the two machines (e.g. gluster, heartbeat and cassandra) all work
>
> Running infod-client -h 10.0.0.5 or infod-client -h 10.0.0.7 produces same result: says there are 3 machines in the cluster and that onlu "localhost" is alive
>

Once you correct the above files. Run infod on the cluster nodes (in
your case 10.0.0.5 and 10.0.0.7).
Then you can run infod-client from the cluster nodes or from other
nodes (assuming you have the infod-client binary installed on those
nodes).

You can also use the mmon client to get a curses based graphical
display of the cluster nodes status.


> 3. In addition to the port 8000 mentioned in the documentation and config file, when infod is running it also seems to use two other ports (partial output from nmap below):
>
> 12000/tcp open  cce4x
> 16000/tcp open  unknown
>
> Is this right and, if so, shouldn't it be mentioned in the documentation?

You are correct, I forgot to mention those ports in the documentation,
will be fixed in 1.8.9 when it is released.


Best Regards,

--lior

----------------------oo--o(:-:)o--oo----------------
Lior Amar, Ph.D.
Cluster Logic Ltd --> The Art of HPC
www.clusterlogic.net
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