GridSeed: working notes

GridSeed testbed

The GridSeed main testbed is currently installed at SISSA/Democritos. It consists of several VMs running on hosts:

All VMs are currently run and managed with VirtualBox (which see).

GridSeed VMs (up and running)

As of 2010-02-02, the following hosts are up and running:

GridSeed VMs (off)

Some other virtual machines exists, but not running ATM:

More hosts are registered in the DNS than actually deployed as VMs.

Template VMs (off)

These VMs should be copied to add a new node to GRIDSEED; instructions to do so are in the NewHost page.

Questions/FIXME's

• what's the difference between lfc and top-lfc? As far as I know, you cannot run two separate LFC instances on one host
• why are some Grid services running on master and some on central-1?

How to...

Connect to the testbed

Complete instructions can be found at: http://doc.escience-lab.org/index.php/Main/SSHtunnel

The procedure of connectiong to neon can be almost automated with the following one-liner::

alias neon='nc -z localhost 2222 || (ssh democritos.sissa.it -N -L 2222:neon.hpc.sissa.it:22 & \
sleep 4); ssh localhost -t -p 2222 -X'

Connecting directly to master can also be automated with a one-liner::

alias master='nc -z localhost 2222 || (ssh democritos.sissa.it -N -L 2222:neon.hpc.sissa.it:22 & \
sleep 4); ssh localhost -t -p 2222 -X ssh root@master -X'

List all machines currently registered in DNS

On any GridSeed machine, run the command::

  host -t AXFR grid.seed

More hosts are registered in the DNS than actually deployed as VMs, so this command will return a lot of unused usernames.

List all VMs installed, and their running status

The location and status of all GridSeed VMs can be printed with the script::

  /opt/gridseed/bin/list-VM

Here is a sample output::

--------- neon ---------
running         master
************************* gridseedenv *************************
--------- gridseed07---------
running         central-1
running         wms
--------- gridseed08---------
running         se-1
running         ui-1
--------- gridseed09---------
running         ce-1wn2
running         ce-1wn1
running         ce-1
running         ui-2
--------- gridseed10---------
running         se-2
running         ce-2wn1
off             test
off             template
running         ce-2
--------- gridseed11---------
running         arc_ce
off             ce-3

List all DNS names currently _up_

On any GridSeed machine, run the command::

  host -t AXFR grid.seed \
       | cut -d. -f1 \
       | grep '^[a-z]' \
       | (while read host;
                do ping -c 1 -W 1 $host >/dev/null && echo $host;
         done)