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Thread: Saving the Machine state with a script when host shuts down

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  1. #1
    Join Date
    Jul 2012
    Beans
    1

    Saving the Machine state with a script when host shuts down

    I am working on a script to work with a program called "APCUPSD" for the battery backup monitor. We have tons of power outages and keep our computers running 24/7. It is mission critital for these VM's to keep up and running.
    In APCUPSD there is a script called RUNLIMIT; this is the script that is supposed to execute when the program detects that there is a certain number of minute of battery life remaining and these are the things its going to do before it safely shuts down the operating system. In this case its Ubuntu. We are using this on versions 10, 11, and 12 of ubuntu.

    Here is the script I put in RUNLIMIT:

    Code:
    #! /bin/sh
    #This event is generated when the MINUTES value
    #defined in the apcupsd.conf file expires while
    #in a power fail condition. The MINUTES is the
    #remaining runtime as internally calculated by
    #the UPS and monitored by apcupsd. After completing
    #this event, apcupsd will immediately initiate
    #a doshutdown event.
    
    logfile=/home/user/apcupsd.log
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): EVENT LOG START >> $logfile
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): Event: runlimit >> $logfile
    echo "Power is critacally low, less than 25 minutes until shutdown" | festival --tts
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): "Power is critacally low, less than 25 minutes untill shutdown." >> $logfile
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): "Uptime:" $(uptime) >> $logfile
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): "Current running VM's:" >> $logfile
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): $(sudo -u zebisrep -i vboxmanage list runningvms) >> $logfile
    echo saving the virtual machine state | /usr/bin/festival --tts
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): "Saving the virtual machine state." >> $logfile
    sudo -u user -i vboxmanage controlvm WinXP savestate >> $logfile 2>%1
    COUNT=1
    sleep 5
    echo $(sudo -u user -i vboxmanage list runningvms | grep WinXP) >> $logfile
    
    while su - user vboxmanage list runningvms | grep WinXP
    do
    sleep 25
    echo $(sudo -u user -i vboxmanage list runningvms) >> $logfile
    COUNT=$((COUNT+1))
    echo "loop number $COUNT" >> $logfile
    if [ $COUNT -gt 10 ] 
    then
    echo "Server still running." >> $logfile #exit 10
    exit 10 
    fi
    #after 5 minutes the VM is still running
    done
    echo virtual machine state saved | /usr/bin/festival --tts
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): "Virtual machine state saved." >> $logfile
    echo $(date +%C%y-%m-%d) $(date +%l:%M:%S.%N): END EVENT LOG >> $logfile
    echo "---------------------------------------------" >> $logfile
    exit 0
    The problem we are having is that sometimes it starts to run this script as we can tell from the log it creates but it addruptly stops. It never saves the state, aborts our running VM, interupts mission critical operations, and causes alot of file corruption. Fortunatly we regulalry backup our VM's VDI's, but we don't need to be spending 30-40 minutes copying old VDI's back every time the power goes out.

    If anyone hase ever done this before, or if you have any suggestions as to what to do. Please let us know. This summer has been brutal on our computers. We are in the south parts of florida "the lighting capital". So you can just imaging how often we loose power. Is almost a daily occurence and it ussually happens between 1 and 5 am, when we can't be here to save our VM states.

  2. #2
    Join Date
    Jun 2007
    Location
    Neverland
    Beans
    894
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Saving the Machine state with a script when host shuts down

    Do you know the stage where it quits?
    Always at the same point? A specific command?
    Dedoimedo
    Linux Systems Expert / Systems Programmer, LPIC-1, LPIC-2(WIP), GSEC, CCHD, CCHA
    http://www.dedoimedo.com - A place to learn a lot about a lot!

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  3. #3
    Join Date
    Oct 2009
    Beans
    Hidden!
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Saving the Machine state with a script when host shuts down

    *pokes thread*

    See the script I wrote up here:
    http://charlesa.net/scripts/linux/vi...ipt-ubuntu.php

    I ended up writing it in order to get around the haxxish way I was saving the VM state on power failure - having a script run every minute to check if a power failure flag existed and shutdown the VMs if it did.

    Running a startup/shutdown script is way easier.
    Last edited by CharlesA; April 16th, 2013 at 05:47 AM. Reason: updated url
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