CentOS - Jul 2015 - Gracefully powering off system in case of power failure

On 7/4/2015 12:27 PM, g wrote:
>
> On 07/04/15 01:27, Jatin Davey wrote:
> <>
>
>> In case of power failure on this server , how can i make the system to
>> shutdown gracefully so that it unmounts the file-system and cleans up
>> the required buffers.
>>
>> My server does have a battery backup so it will help in shutting down
>> the system more gracefully.
> use what is already packaged for centos:
>
>    apcupsd - apc ups
>    http://www.apcupsd.com
> or
>    nut - network ups tools
>    http://www.networkupstools.org/
>
> apcupsd is designed to run with apc brand ups.
>
> nut is designed to run with apc and other brands.
>
> both monitor ups and will shut system down via shutdown command.
>
> i use apcupsd on my system with an apc back-ups rs 800 and have never
> had problems.
>
> during a 5 day power outage, i had change config so i could run system
> when i used a gas powered generator to supply mains and voltage would
> drop to a low of around 90 v.
>
>
> hth.
>
>
My server supports ACPI 4.0 standard , Will that be helpful ?

Thanks
Jatin

On 7/4/2015 12:28 AM, Jatin Davey wrote:
>>
> My server supports ACPI 4.0 standard , Will that be helpful ? 
does `init 0` as a root command cause it to gracefully shut down and 
power off ?      thats all the ACPI support you need.


what brand/model UPS (battery backup) do you have ?    the UPS software, 
apcupsd and/or NUT, needs to listen to the UPS to tell it when the power 
has failed, then it can tell your OS to shutdown after a suitable delay 
(if your UPS is good for 30 minutes, you might not want to shut down 
until the power has failed for 15 minutes, so brief outages don't cause 
a shutdown)



-- 
john r pierce, recycling bits in santa cruz

On 7/4/2015 1:07 PM, John R Pierce wrote:
> On 7/4/2015 12:28 AM, Jatin Davey wrote:
>>>
>> My server supports ACPI 4.0 standard , Will that be helpful ? 
>
> does `init 0` as a root command cause it to gracefully shut down and 
> power off ?      thats all the ACPI support you need.
[Jatin] Yes, init 0 does gracefully shutdown the server and power
off.
>
>
> what brand/model UPS (battery backup) do you have ?
[Jatin] I am still reading through the documentation of my server to 
find out the battery backup in it. Is there any command within the OS 
that i can use to find out this information ?
> the UPS software, apcupsd and/or NUT, needs to listen to the UPS to 
> tell it when the power has failed, then it can tell your OS to 
> shutdown after a suitable delay (if your UPS is good for 30 minutes, 
> you might not want to shut down until the power has failed for 15 
> minutes, so brief outages don't cause a shutdown)
>
>
>