#!/bin/sh

# This is a backwards compatibility hack to allow an /etc/init.d/nova-compute
# script that will still start up nova-compute but also allow the "service"
# mechanism to properly track the run state of the service.

. /etc/init.d/task_affinity_functions.sh

function log ()
{
    logger -p local1.info -t nova-compute $@
    echo nova-compute: "$@"
}

# WRS: nova-compute may be started only by nova-cleanup or nova-startup.
# Initial start via runlevel nova-init -> /etc/init.d/nova-cleanup -> /etc/init.d/nova-compute
# Restart via pmond monitor -> /etc/init.d/nova-startup -> /etc/init.d/nova-compute
function check_caller ()
{
    caller=$(pstree -s -p $$)
    if echo "${caller}" | grep -q -v -e "nova-cleanup" -e "nova-startup"; then
        log "Call $0 ignored, expecting caller: nova-cleanup or nova-startup. Caller=${caller}"
        exit 0
    fi
}

start ()
{
    if [ ! -d /var/log/nova ]; then
        mkdir /var/log/nova
    fi

    log "Reaffining tasks back to platform cores..."
    affine_tasks_to_platform_cores
    [[ $? -eq 0 ]] && log "Tasks re-affining done." || log "Tasks re-affining failed."

    echo -n "Starting nova-compute..."
    systemctl start nova-compute.service

    if [ $? -eq 0 ]; then
        echo "done."
    else
        echo "failed."
    fi
}

stop ()
{
    echo -n "Stopping nova-compute..."
    systemctl stop nova-compute.service
    if [ $? -eq 0 ]; then
        echo "done."
    else
        echo "failed."
    fi
    rm -f $PIDFILE
}

status()
{
    systemctl status nova-compute.service
}

reset()
{
    :
}

case "$1" in
    start)
        check_caller
        start
        ;;
    stop)
        check_caller
        stop
        ;;
    restart|force-reload|reload)
        stop
        start
        ;;
    status)
        status
        ;;
    reset)
        reset
        ;;
    *)
        echo "Usage: $0 {start|stop|force-reload|restart|reload|status|reset}"
        exit 1
        ;;
esac

exit 0