ssh.in

Linux Heartbeat Source Code

#!/bin/sh
#
# External STONITH module for ssh.
#
# Copyright (c) 2004 SUSE LINUX AG - Lars Marowsky-Bree <[e-mail]>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#

#SSH_COMMAND "@SSH@ -q -x -o PasswordAuthentication=no StrictHostKeyChecking=no" 
SSH_COMMAND="@SSH@ -q -x -n -l root"

REBOOT_COMMAND="echo 'sleep 2; @REBOOT@ @REBOOT_OPTIONS@' | SHELL=/bin/sh at now >/dev/null 2>&1"

# Warning: If you select this poweroff command, it'll physically
# power-off the machine, and quite a number of systems won't be remotely
# revivable.
# TODO: Probably should touch a file on the server instead to just
# prevent heartbeat et al from being started after the reboot.
# POWEROFF_COMMAND="echo 'sleep 2; /sbin/poweroff -nf' | SHELL=/bin/sh at now >/dev/null 2>&1"
POWEROFF_COMMAND="echo 'sleep 2; @REBOOT@ @REBOOT_OPTIONS@' | SHELL=/bin/sh at now >/dev/null 2>&1"

# Rewrite the hostlist to accept "," as a delimeter for hostnames too.
hostlist=`echo $hostlist | tr ',' ' '`

CheckIfDead() {
	for j in 1 2 3
        do
          if
            ping -w1 -c1 "$1" >/dev/null 2>&1
          then
            return 1
          fi
        done
        return 0
}

case $1 in
gethosts)
	for h in $hostlist ; do
		echo $h
	done
	exit 0
	;;
on)
	# Can't really be implemented because ssh cannot power on a system
	# when it is powered off.
	exit 1
	;;
off)
	# Shouldn't really be implemented because if ssh cannot power on a 
	# system, it shouldn't be allowed to power it off.
	exit 1
	;;
reset)
	for h in $hostlist
	do
	  if
            [ "$h" != "$2" ]
          then
            continue
          fi
	  $SSH_COMMAND "$2" "$REBOOT_COMMAND"
	  # Good thing this is only for testing...
          for j in 1 2 3 4 5
          do
            if
              CheckIfDead "$2"
            then
	      exit 0
            fi
            sleep 1
          done
	done
	exit 1
	;;
status)
	if
	  [ -z "$hostlist" ]
	then
	  exit 1
	fi
	for h in $hostlist
	do
	  if
            ping -w1 -c1 "$h" 2>&1 | grep "unknown host"
          then
	    exit 1
	  fi
	done
	exit 0
	;;
getconfignames)
	echo "hostlist"
	exit 0
	;;
getinfo-devid)
	echo "ssh STONITH device"
	exit 0
	;;
getinfo-devname)
	echo "ssh STONITH external device"
	exit 0
	;;
getinfo-devdescr)
	echo "ssh-based Linux host reset"
	echo "Fine for testing, but not suitable for production!"
	exit 0
	;;
getinfo-devurl)
	echo "http://openssh.org"
	exit 0
	;;
getinfo-xml)
	cat << SSHXML
<parameters>
<parameter name="hostlist" unique="1" required="1">
<content type="string" />
<shortdesc lang="en">
Hostlist
</shortdesc>
<longdesc lang="en">
The list of hosts that the STONITH device controls
</longdesc>
</parameter>
</parameters>
SSHXML
	exit 0
	;;
*)
	exit 1
	;;
esac