code.grnet.gr Git - ganeti-local/blob - doc/examples/ganeti-kvm-poweroff.initd.in

   1 #!/bin/bash
   2 # ganeti kvm instance poweroff
   3 # based on skeleton from Debian GNU/Linux
   4 ### BEGIN INIT INFO
   5 # Provides:          ganeti-kvm-poweroff
   6 # Required-Start:
   7 # Required-Stop:     drbd qemu-kvm $local_fs
   8 # Default-Start:
   9 # Default-Stop: 0 1 6
  10 # Short-Description: Poweroff Ganeti KVM instances
  11 # Description: Sends system_powerdown command to Ganeti instances, otherwise
  12 # they will be killed.
  13 ### END INIT INFO
  14
  15 shopt -s nullglob
  16
  17 PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
  18 DESC="Ganeti KVM instance poweroff "
  19
  20 . /lib/lsb/init-functions
  21
  22 CONTROL_PATH="@LOCALSTATEDIR@/run/ganeti/kvm-hypervisor/ctrl"
  23 SCRIPTNAME="@SYSCONFDIR@/init.d/ganeti-kvm-poweroff"
  24 TIMEOUT=60
  25
  26 do_kvm_poweroff () {
  27     # shutdown VMs and remove sockets of those not running
  28     for vm_monitor in $CONTROL_PATH/*.monitor; do
  29         if ! echo system_powerdown | \
  30             socat -U UNIX:$vm_monitor STDIO > /dev/null 2>&1; then
  31             # remove disconnected socket
  32             rm -f $vm_monitor
  33         fi
  34     done
  35
  36     log_action_begin_msg "Waiting VMs to poweroff"
  37     waiting=true
  38     remaning=$TIMEOUT
  39     while $waiting && [ $remaning -ne 0 ]; do
  40         if [[ -z "$(find $CONTROL_PATH -name '*.monitor')" ]]; then
  41             break
  42         fi
  43
  44         echo -n "."
  45         for vm_monitor in $CONTROL_PATH/*.monitor; do
  46             if ! echo | socat -U UNIX:$vm_monitor STDIO > /dev/null 2>&1; then
  47                 rm -rf $vm_monitor
  48             fi
  49         done
  50
  51         sleep 5
  52         let remaining-=5 1
  53     done
  54
  55     if [[ -z "$(find $CONTROL_PATH -name '*.monitor')" ]]; then
  56         log_action_end_msg 0
  57     else
  58         log_action_end_msg 1 "some VMs did not shutdown"
  59     fi
  60 }
  61
  62 case "$1" in
  63   start)
  64     # No-op
  65     ;;
  66   restart|reload|force-reload)
  67     echo "Error: argument '$1' not supported" >&2
  68     exit 3
  69     ;;
  70   stop)
  71     do_kvm_poweroff
  72     ;;
  73   *)
  74     echo "Usage: $0 start|stop" >&2
  75     exit 3
  76     ;;
  77 esac