ssh.in

linux 双机热备之 心跳程序源码

#!/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; /sbin/reboot -nf' | 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; /sbin/reboot -nf' | SHELL=/bin/sh at now >/dev/null 2>&1"

case $1 in
gethosts)
	for h in $ST_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 $ST_HOSTLIST ; do
		if [ "$h" = "$2" ] ; then
			$SSH_COMMAND $2 $REBOOT_COMMAND
			rc=$?
			if [ $rc == 0 ]; then 
				sleep 2
			fi
			exit $rc
		fi
	done
	exit 1
	;;
status)
	for h in $ST_HOSTLIST ; do
		host $h | grep "not found:"
		if [ $? == 0 ]; then
			exit 1
		fi
	done
	exit 0
	;;
getconfignames)
	echo "ST_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=\"ST_HOSTLIST\" unique=\"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