1. 28 Jul, 2011 1 commit
    • Leigh Stoller's avatar
      Power "saving" additions from Barry Trent, who got them from Kevin · 03478fb9
      Leigh Stoller authored
      Lahey.
      
      Power saving turns off nodes that have been sitting in PXEWAIT (and
      are thus free) for more then a set amount of time (see sitevar
      general/idlepower_idletime, which defaults to 3600 seconds).
      
      The driver script is tbsetup/idlepower.in and needs to be added to
      /etc/crontab at sites that want to do this. Even so, operation is
      enabled by the sitevar general/idlepower_enable. Each time it runs, it
      checks for nodes that need to be turned off, and then calls power.
      Note: This should be a daemon not a cron job.
      
      To be considered for power saving, you must add an attribute to the
      node_type_attributes table called 'idlepower_enable', set to 1.
      
      Locally, I hacked up stated and power to make the state transitions
      legal so that stated does not whine. I added POWEROFF as a valid
      transition from any state, to opmodes NORMAL, NORMALv1, and NORMALv2.
      Barry's original patch already had a state transition for PXEKERNEL.
      In power, I added code to look at the actual operation, and in the
      case of "on", do not send an event if the node is not in POWEROFF,
      since a user can foolishly say power on anytime, and the node is on
      nothing is every going to change, and the state transition would be
      wrong.
      
      node_reboot takes of powering nodes on, when they are in POWEROFF.
      
      Barry on copyright issues:
       "I'm not sure those rights are mine to grant! Remember that this code
       came originally from Kevin Lahey (kml@patheticgeek.net) and
       originated at DETER (although he's apparently not there anymore). I
       don't foresee a problem from our point of view (but I'll double
       check, of course). Shall I try to contact Kevin try to sort this mess
       out, or do you think it's better to coordinate from your end?"
      03478fb9