perfSONAR User Q&A and Other Discussion

[Andrew Lake <>]

Hi,

As far as I can tell, the mesh is working like you expect it to, just perhaps the display needs some explanation. You mesh does indeed lead to measurements between all 4 nodes for a total of 12 tests. The way the test listing works though is to organize things by unique source/destination pairs, of which there are only 6 (12 divided by 2). For example instead of fi-csc-pstp01-mi1.nordu.net to de-hmb2-pstp01-mi1.nordu.net getting one row and de-hmb2-pstp01-mi1.nordu.net to  fi-csc-pstp01-mi1.nordu.net getting another row, the forward and reverse direction are collapsed into the same row with the arrows next to the numbers for throughput, latency and loss indicating the direction. 

Hope that helps,

Andy

On August 11, 2017 at 7:38:56 AM, Jon Clausen () wrote:

Hi

I'm working on this perfSONAR setup with 4 measurement nodes and a central
archive, and now I could use a couple of pointers.

The nodes are installed as CentOS7 with the personar-testpoint package added
(so, not installed from the 'toolkit' ISO) on physical machines with 1G
'management' NIC (ssh listens on this interface only) and a 10G interface
for measurements.

Each host has a dns name for the 1G interface and another for the 10G
interface, so the one int the danish datacenter is;
1g = dk-ore-pstp01.nordu.net
10G = dk-ore-pstp01-mi1.nordu.net

The nodes have this /etc/perfsonar/meshconfig-agent.conf
---
<mesh>
configuration_url https://psma.nordu.net/meshconfig/nordunet.json
</mesh>
configure_archives 1
---

The archive host is a VM, also installed from the CentOS7 media, with
perfSONAR erpo and software added post install.
Originally I had not installed the 'perfsonar-toolkit' package, because I
was under the impression that the measurement archive would 'work' without
it, and because I thought the dependencies brought in a number of
"undesirable" stuff.
After some time, I changed my mind and did install perfsonar-toolkit.

I have a 'nordunet-mesh.conf' which build_json happily transforms to:
https://psma.nordu.net/meshconfig/nordunet.json

The nodes are getting the config from the above URL and seem to be working
fine, but I'm not sure the MA is...

I *think* the 'mesh' described should result in measurements between all
four nodes, leading to a total of 12 entries on the 'toolkit' page:

https://psma.nordu.net/toolkit/

What I'm seeing, however, is just six and I am going to need help to
understand why :P

As I wrote in the other thread I'm a perfSONAR newbie, and there are huge
gaps in my "knowledge" at this point...

I went through the steps at
http://docs.perfsonar.net/troubleshooting_overview.html and verified that
the basic tests work between each node and the other three.
I have not (yet) disabled SELinux on the MA, since I figure that it would
prevent the web ui from working completely, not 'filter' what the ui shows.

My 'hunch' is that either the 'mesh' config does not describe what I want it
to, or the 'toolkit' ui config needs updating somehow - but I realise the
issue might well be something else entirely.

Of course I'll provide additional info as necessary, but at this point I
don't know what to look for...

Thanks in advance for any pointers
/jon

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