perfSONAR User Q&A and Other Discussion

["Robinson, John-Paul" <>]

Hi,

We've been working on a setting up a test mesh for a workshop at SoX 
(all nodes on same lan, all 1GigE nics).

Followed the steps as outlined here with minor adjustment for the 
maddash service name change in 4.1.x

https://bozeman-fiona-workshop.ucsd.edu/materials/exercises-perfsonar-centralmanagement.htm
 


The mesh config was built from the skeleton example and published by 
psconfig to:

https://soxws14.sox.net/psconfig/mesh-soxws.json

The nodes in the mesh seem to be picking up the config and the maddash 
is displaying the grid:

https://soxws14.sox.net/maddash-webui/index.cgi?dashboard=SoX%20FIONA%20Workshop%20Measurements

There appears to be a problem ingesting the test results into the esmond 
though.  The configuration has been up for several hours but only tests 
originating from the host running the maddash are appearing in the data.

We populated the permissions for the esmond like so, where the input 
provides the IP of each node in the mesh:

for node in `cat soxws-nodes`
do
   ip=`host $node | cut -d" " -f4`
   echo $ip
   sudo /usr/sbin/esmond_manage add_user_ip_address example_user  $ip 
143.215.191.0/26
done

We suspect something is up with cassandra the status shows somewhat 
confusing output "active (exited)":

workshop@soxws14:~/projects/mesh$ sudo systemctl status cassandra
● cassandra.service - SYSV: Starts and stops Cassandra
    Loaded: loaded (/etc/rc.d/init.d/cassandra; bad; vendor preset: 
disabled)
    Active: active (exited) since Fri 2018-09-21 16:43:46 UTC; 24min ago
      Docs: man:systemd-sysv-generator(8)
   Process: 5622 ExecStop=/etc/rc.d/init.d/cassandra stop (code=exited, 
status=1/FAILURE)
   Process: 5934 ExecStart=/etc/rc.d/init.d/cassandra start 
(code=exited, status=0/SUCCESS)

Sep 21 16:43:46 soxws14.sox.net systemd[1]: Starting SYSV: Starts and 
stops Cassandra...
Sep 21 16:43:46 soxws14.sox.net su[5943]: (to cassandra) root on none
Sep 21 16:43:46 soxws14.sox.net cassandra[5934]: Starting Cassandra: OK
Sep 21 16:43:46 soxws14.sox.net systemd[1]: Started SYSV: Starts and 
stops Cassandra.

There are reports of this behavior being associated with java versions 
and cassandra.  Having followed stock steps for perfsonar central 
management install, I wouldn't expect that to be an issue.

Curious if there are any insights on potential issues or where to look.

Thanks,

John-Paul