Synnefo » snf-ganeti

#!/bin/bash

#

# Copyright (C) 2011 Google Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

SSH_USER='root'

SSH_FLAGS='-q -oStrictHostKeyChecking=no'

EXIT_SUCCESS=0

EXIT_FAILURE=1

EXIT_UNKNOWN=2

_run_ssh() {

  local host="$1"

  local command="$2"

  ssh $SSH_FLAGS "$SSH_USER@$host" "$command" 1>&2

  return $?

}

_power_on() {

  echo 'power-on not supported in this script' >&2

  exit $EXIT_FAILURE

}

_power_off() {

  local host="$1"

  if ! _run_ssh "$host" 'shutdown -h now'; then

    echo "Failure during ssh to $host" >&2

    exit $EXIT_FAILURE

  fi

}

_power_cycle() {

  local host="$1"

  if ! _run_ssh "$host" 'shutdown -r now'; then

    echo "Failure during ssh to $host" >&2

    exit $EXIT_FAILURE

  fi

}

_power_status() {

  local host="$1"

  if fping -q "$host" > /dev/null 2>&1; then

    echo '{ "powered": true }'

  else

    echo '{ "powered": false }'

  fi

}

_health() {

  echo 'health not supported in this script' >&2

  exit $EXIT_FAILURE

}

_action() {

  local command="$1"

  local host="$2"

  case "$command" in

    power-on)

      _power_on "$host"

      ;;

    power-off)

      _power_off "$host"

      ;;

    power-cycle)

      _power_cycle "$host"

      ;;

    power-status)

      _power_status "$host"

      ;;

    health)

      _health "$host"

      ;;

    *)

      echo "Unsupported command '$command'" >&2

      exit $EXIT_FAILURE

      ;;

  esac

}

main() {

  if [[ $# != 2 ]]; then

    echo "Wrong argument count, got $#, expected 2" >&2

    exit $EXIT_FAILURE

  fi

  _action "$@"

  exit $EXIT_SUCCESS

}

main "$@"