Hi Jim, On Tue, 18 Feb 2014, Jim Klimov wrote:
> Hello all, > > I was asked about a proper way to ensure powerfail shutdown of a blade > server fed off an APC SmartUPS, which is monitored by all hosts over > SNMP. In particular, they'd like to avoid the "untimely" return of > utility power - when the OSes are already shutting down, and would > stay down because the UPS is well-fed now and thus won't power off > and later power on to boot the servers. > > On smaller systems directly connected to an UPS with a ser/usb cable, > I remember sending an ups-poweroff signal in the end of the shutdown > procedure, which effectively rebooted the UPS and its load (if the > wall power is already back). This required picking an ups model that > did not stay down in such case, of course. > > Now, with the blade situation - each server might need unpredictably > long to shut down. It would be inappropriate for the first one to yank > power off those which are still going down. > > Also, according to the manpage, the snmp-ups driver might not implement > the shutdown commands at all because "it is run at the time when the > networking might already be unconfigured" (strange reasoning, not all > OSes even do that unconfiguration). > > So, I wonder if the list members can suggest a way to signal the > APC SmartUPS to go down and return if the power comes back or if > it is already present at the time of UPS poweroff (thus acting > as a reboot)? > > Also, is it possible to request a delay in such poweroff, i.e. each > host going down would ask the UPS to poweroff in, say, 5 minutes > (so that other hosts have ample time to shut down properly) with > each such signal "restarting" the timer, or perhaps to explicitly > ask the UPS to cancel pending shutdown and then ask it to do it > again? > > Can it be done with SNMP or rather some telnet/expect scripting? > There are no serial ports to connect the UPS directly to one of > the blade servers... Seems like a similar user case to ESXi. If you've got a AP9630 card these notes may be useful. # APC ap9630 notes: # Use firmware 6.0.6 or later if you want SNMPv3 # Configuration->Shutdown # In "Start of Shutdown" section, set "Low Battery Duration" and # "Shutdown Delay" to get enough grace time for the ESXI shutdown # Optionally, in "End of Shutdown" section set "Return Delay" to 60 seconds. # Now here are the OIDs (pick one) to actually turn the UPS off after the shutdown delay. # reboot gracefully (APC) (stays off until utility power is restored) UPS_OID=".1.3.6.1.4.1.318.1.1.1.6.2.2.0 integer 3" # turn off UP gracefully (APC) (stays off even if power is restored) #UPS_OID=".1.3.6.1.4.1.318.1.1.1.6.2.1.0 integer 3" # -- Tim Rice Multitalents (707) 456-1146 [email protected] _______________________________________________ Nut-upsdev mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsdev
