Notes from Post-GEC14 testing of GIMI

Step	Status
Establish test/experiment environment
Obtain slice of GENI resources, install and configure GIMI I&M tools
Run and orchestrate GIMI I&M tools and reference/actual experiment
Push I&M measurement results to iRODS archive service
Pull I&M measurement results from iRODS archive service to UW for processing
Observe I&M measurement results on GIMI presentation service
Release resources, and cleanup

1. Establish test/experiment environment

User Workspace

• Using the GEC14 Tutorial VM
• Inputs:
  • GENI certificate
    • installed in $HOME/.ssl
    • location configured in omni_config
    • stripped the passphrase for automation
  • SSH key pair
    • installed in $HOME/.ssh
    • location configured in omni_config
    • key added to ssh-agent
  • iRODS account
    • username configured in $HOME/.irods/.irodsEnv
    • password stored using iinit
• All credentials configured using credconfig.sh script
• Outputs:
  • omni.py ready to use
  • i-commands ready to use
  • ready to log into nodes in the slice

iRODS server

• iRODS server on emmy8 was down so I set up my own on pc41.emulab.net

OML server

• Set up my own OML server on pc41.emulab.net
• I was not able to get the oml2-server to use the hook script when started as a service (/etc/init.d/oml2-server start) - only when started on the command line:

  $ oml2-server --listen=3003 --data-dir=/users/johren/gimi --logfile=/users/johren/oml_server.log -H /users/johren/oml2-server-hook.sh
  

• Configured hook script to use my iRODS server

2. Obtain slice of GENI resources, install and configure GIMI I&M tools

• Used omni to create the slice and the sliver on ExoSM aggregate
  • rspec link here
• Rspec includes an execute service for each node that downloads ​gimi-postboot.sh from the web server (on pc41.emulab.net) and runs it with the slicename and nodeid parameters

      <services>
        <execute command="wget -q -P /tmp http://pc41.emulab.net/gimi-postboot.sh ;chmod +x /tmp/gimi-postboot.sh;/tmp/gimi-postboot.sh %SLICENAME% NodeB > /tmp/gimi-postboot.log" shell="/bin/sh"/>
      </services>
  

3. Run and orchestrate GIMI I&M tools and reference/actual experiment

• Run the tcp_iperf.rb script using the EC on the UW VM

  $ omf-5.4 exec --no-cmc -S johGIM1208011452 tcp_iperf.rb -- --source1 johGIM1208011452-NodeA --sink johGIM1208011452-NodeC
  

4. Push I&M measurement results to iRODS archive service

• This is done by the oml2-server-hook.sh script
• I had to do a lot of modification to this script because it is very tailored to the OML server configuration
  • Pulls filename and username from the path of the file so it is very dependent upon the filesystem configuration of the server (e.g. home directories are in /users instead of /home)
  • Had to make some changes to the ichmod commands to get it to work with my iRODS server
• The hook script currently expects the usernames to begin with "gimi". I had to modify my script to look specifically for my username. This will not currently work on emmy9 when experimenters use their own credentials

5. Pull I&M measurement results from iRODS archive service to UW/iREEL

• Ran the tutorial_viz.sh command to pull the results from iRODS and run the R script on it to create the images
• The R script is currently failing and, therefore, not producing the graphs:

  > mydata1 <- dbGetQuery(con, "select oml_sender_id,begin_interval,size,end_interval from iperf_transfer where oml_sender_id=1")
  > intervals1 <- mydata1$end_interval - mydata1$begin_interval
  > throughput1 <- abs(mydata1$size)/intervals1/1024/1024*8
  Error in abs(mydata1$size) :
    Non-numeric argument to mathematical function
  Execution halted
  spawn sudo cp johGIM1208011452.png /var/www/
  [sudo] password for geniuser:
  cp: cannot stat `johGIM1208011452.png': No such file or directory 
  

6. Observe I&M measurement results on GIMI presentation service

7. Release resources, and cleanup