== How to switch !On/Off the nodes of a Testbed == To switch some nodes On/Off on the 'grid' testbed, use the command: {{{ omf tell -a on -t all }}} will turn On the entire set of 20x20 nodes on the '''grid'''. {{{ omf tell -a offs -t node3-1.grid.orbit-lab.org,node5-6.grid.orbit-lab.org,node1-1.grid.orbit-lab.org,node1-2.grid.orbit-lab.org }}} will turn Off (soft, that is attempt a graceful shutdown) the nodes 3,1 and 5,6 and 1,1 and 1,2 {{{ omf tell -a offh -t node3-1.grid.orbit-lab.org,node5-6.grid.orbit-lab.org,node1-1.grid.orbit-lab.org,node1-2.grid.orbit-lab.org }}} will turn Off (hard, that is "hold down" the power button) the nodes 3,1 and 5,6 and 1,1 and 1,2 == Learning More == The complete available options for this command is given by ''"omf help tell"'': {{{ user@console.grid:~$ omf help tell Switch ON/OFF and reboot the nodes in a testbed Usage: omf tell -a ACTION [-h] [-t TOPOLOGY] [-c AGGREGATE] With: -h, --help print this help message -a, --action ACTION specify an action ACTION: on turn node(s) ON offs turn node(s) OFF (soft) offh turn node(s) OFF (hard) reboot reboots node(s) (soft) reset resets node(s) (hard) -c, --config AGGREGATE use testbed AGGREGATE -t, --topology TOPOLOGY a valid topology file or description (defaults to 'system:topo:all') Some Examples: omf tell -a reset omf tell -a on -t system:topo:all -c grid omf tell -a reboot -t omf.nicta.node1 omf tell -a offs -t omf.nicta.node1,omf.nicta.node2 -c sb1 omf tell -a offh -t system:topo:all omf tell -a reset -t topo_grid_active }}} Of particular interest is the -t flag which can be used to specify arbitrary topolgies. These can be of the form "nodex1-y1.fqdn,nodex2-y2.fqdn,..."