doc/examples/ganeti-kvm-poweroff.initd.in

#!/bin/bash
# ganeti kvm instance poweroff
# based on skeleton from Debian GNU/Linux
### BEGIN INIT INFO
# Provides:          ganeti-kvm-poweroff
# Required-Start:
# Required-Stop:     drbd qemu-kvm $local_fs
# Default-Start:
# Default-Stop: 0 1 6
# Short-Description: Poweroff Ganeti KVM instances
# Description: Sends system_powerdown command to Ganeti instances, otherwise
# they will be killed.
### END INIT INFO

shopt -s nullglob

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
DESC="Ganeti KVM instance poweroff "

. /lib/lsb/init-functions

CONTROL_PATH="@LOCALSTATEDIR@/run/ganeti/kvm-hypervisor/ctrl"
SCRIPTNAME="@SYSCONFDIR@/init.d/ganeti-kvm-poweroff"
TIMEOUT=60

do_kvm_poweroff () {
    # shutdown VMs and remove sockets of those not running
    for vm_monitor in $CONTROL_PATH/*.monitor; do
        if ! echo system_powerdown | \
            socat -U UNIX:$vm_monitor STDIO > /dev/null 2>&1; then
            # remove disconnected socket
            rm -f $vm_monitor
        fi
    done

    log_action_begin_msg "Waiting VMs to poweroff"
    waiting=true
    remaning=$TIMEOUT
    while $waiting && [ $remaning -ne 0 ]; do
        if [[ -z "$(find $CONTROL_PATH -name '*.monitor')" ]]; then
            break
        fi

        echo -n "."
        for vm_monitor in $CONTROL_PATH/*.monitor; do
            if ! echo | socat -U UNIX:$vm_monitor STDIO > /dev/null 2>&1; then
                rm -rf $vm_monitor
            fi
        done

        sleep 5
        let remaining-=5 1
    done

    if [[ -z "$(find $CONTROL_PATH -name '*.monitor')" ]]; then
        log_action_end_msg 0
    else
        log_action_end_msg 1 "some VMs did not shutdown"
    fi
}

case "$1" in
  start)
    # No-op
    ;;
  restart|reload|force-reload)
    echo "Error: argument '$1' not supported" >&2
    exit 3
    ;;
  stop)
    do_kvm_poweroff
    ;;
  *)
    echo "Usage: $0 start|stop" >&2
    exit 3
    ;;
esac