RHCS fence_openstack client used in openstack-白红宇

用于openstack环境中的fence.
RHCS Fencing Agent for use on OpenStack guests
#!/bin/bash## Copyright (c) 2012 Andrew Beekhof#                    All Rights Reserved.## 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.########################################################################description="fence_openstack is an I/O Fencing agent which can be used withOpenStack instances.  In order to function, the agent needs the Pythonnova client and the following data:- region name- tenant name- authentication url (eg. http://open.stack:5000/v2.0/)- user name- passwordThe value for 'port' can either be the. - Instance name (must not contain spaces), - Instance ID (eg. 0365bd97-3c2d-416f-ae07-b9772aff5938)If the name used by the cluster node is one of these values, then,when used with Pacemaker, the agent should be able to automaticallydiscover the instances it can control.The name and id values can be obtained using 'nova list', eg.+--------------------------------------+----------------+--------+---------------------------------------+| ID                                   | Name           | Status | Networks                              |+--------------------------------------+----------------+--------+---------------------------------------+| 0365bd97-3c2d-416f-ae07-b9772aff5938 | CTS-Master     | ACTIVE | novanetwork=192.168.0.40, 10.16.16.55 || 7320e184-afbd-46a8-aec7-94c38ec67e21 | Fedora-18-base | ACTIVE | novanetwork=192.168.0.9               |+--------------------------------------+----------------+--------+---------------------------------------+"port=""quiet=0unknown_are_stopped=0action="list"         # Default fence action# Inherit from the environment if presentos_region="$OS_REGION_NAME"os_tenant="$OS_TENANT_NAME"os_auth="$OS_AUTH_URL"os_user="$OS_USERNAME"os_pass="$OS_PASSWORD"function usage(){cat <
    
         
      
       $description    
          
      	
       		
        		
        		
        
         Fencing Action
        	
       	
       		
        		
        		
        
         The name/id of a instance to control/check
        	
       	
       		
        		
        		
        
         The OpenStack authentication URL (eg. http://open.stack:5000/v2.0/)
        	
       	
       		
        		
        		
        
         The OpenStack region for which the device should control instances (defaults to us-east-1)
        	
       	
       		
        		
        		
        
         The OpenStack tenant name. Might match the username.
        	
       	
       		
        		
        		
        
         The OpenStack username to connect as
        	
       	
       		
        		
        		
        
         The OpenStack password
        	
       	
       		
        		
        		
        
         DANGER: Assume any unknown instance is safely stopped
        	
           
          
      	
       	
       	
       	
       	
       	
       	
           
      
     EOF    exit 0;}function debug() {    if [ $quiet -eq 1 ]; then	: nothing    else	printf "$*\n"    fi}function error() {    printf "$*\n" 1>&2}function fence_done() {    if [ $quiet -eq 1 ]; then	: nothing    elif [ $1 -eq 0 ]; then	debug "Operation $action (port=$port) passed"    else	error "Operation $action (port=$port) failed: $1"    fi    exit $1}function instance_for_port(){    # Do any funky mapping (like partial ID matches) here    echo $1}function status_for_port() {    status=`$nova show $1 | grep status | awk '{ print $4 }'`    if [ -z $status ]; then	if [ $unknown_are_stopped = 1 ]; then	    echo "STOPPED"	else	    echo "UNKNOWN"	fi    else	echo $status    fi}TEMP=`getopt -o qVo:e:k:c:r:n:t:U -l version,help,region:,action:,port:,option:,home:,region:,cert:,tenant:,user:,password:,unknown-are-stopped \     -n 'fence_ec2' -- "$@"`if [ $? != 0 ];then     usage    exit 1fi# Note the quotes around `$TEMP': they are essential!eval set -- "$TEMP"# stdin option processingif [ -z $2 ]; then    # If there are no command line args, look for options from stdin    while read line; do	case $line in             option=*|action=*) action=`echo $line | sed s/.*=//`;;            port=*)            port=`echo $line | sed s/.*=//`;;	    region=*)          os_region=`echo $line | sed s/.*=//`;;	    tenant=*)          os_tenant=`echo $line | sed s/.*=//`;;	    auth=*)            os_auth=`echo $line | sed s/.*=//`;;	    user=*)            os_user=`echo $line | sed s/.*=//`;;	    password=*)        os_pass=`echo $line | sed s/.*=//`;;	    quiet*)            quiet=1;;	    unknown-are-stopped*) unknown_are_stopped=1;;	    --);;	    *) error "Invalid command: $line";;	esac    donefi# Command line option processingwhile true ; do    case "$1" in	-o|--action|--option) action=$2;    shift; shift;;	-n|--port)            port=$2;      shift; shift;;	-r|--region)          os_region=$2; shift; shift;;	-t|--tenant)          os_tenant=$2; shift; shift;;	-a|--auth)            os_auth=$2;   shift; shift;;	-u|--user)            os_user=$2;   shift; shift;;	-p|--password)        os_pass=$2;   shift; shift;;	-U|--unknown-are-stopped) unknown_are_stopped=1; shift;;	-q|--quiet) quiet=1; shift;;	-V|--version) echo "1.0.0"; exit 0;;	--help|-h) 	    usage;	    exit 0;;	--) shift ; break ;;	*) error "Unknown option: $1. See --help for details."; exit 1;;    esacdone# Normalize the actionaction=`echo $action | tr 'A-Z' 'a-z'`case $action in    hostlist|list) action=list;;    stat|status)   action=status;;    reboot|reset)  action=reboot;;    poweron|on)    action=start;;    poweroff|off)  action=stop;;esacnova="nova --os-username $os_user --os-password $os_pass --os-tenant-name $os_tenant --os-auth-url $os_auth"instance=""if [ ! -z "$port" ]; then    instance=`instance_for_port $port`ficase $action in     metadata) metadata;;    list)	# List of names we know about	$nova list | grep -v -e Status -e --- | awk '{print $4 " " $2}'	;;    monitor)	# Is the device ok?	$nova list &> /dev/null	if [ $? != 0 ]; then	    # If there is a problem, we're probably interested in the output	    $nova list 1>&2	fi	;;    status)	state=`status_for_port $instance`	case $state in	    ACTIVE)    fence_done 0;;	    STOPPED)   fence_done 1;;	    PAUSED)    fence_done 2;;	    SUSPENDED) fence_done 3;;	    UNKNOWN)   fence_done 99;;	    *) error "Unexpected state: $state"; fence_done 100;;	esac	;;    reboot)	state=`status_for_port $instance`	case $state in	    UNKNOWN) 		error "Cannot $action unknown instance: $port"		fence_done 1		;;	    SUSPENDED) 		$nova resume $instance		while [ $state != ACTIVE ]; do		    state=`status_for_port $instance`		done		$nova $action $instance	        ;;	    PAUSED)		$nova unpause $instance		while [ $state != ACTIVE ]; do		    state=`status_for_port $instance`		done		$nova $action $instance;;	    ACTIVE)  $nova $action $instance;;	    STOPPED) $nova start $instance;;	    *) error "Cannot $action instance $port in unexpected state: $status"; fence_done 1;;	esac	;;    start)	state=`status_for_port $instance`	case $state in	    UNKNOWN) 		error "Cannot perform $action action on unknown instance: $port"		fence_done 1		;;	    SUSPENDED) $nova resume $instance;;	    PAUSED)    $nova unpause $instance;;	    ACTIVE)    debug "Already active";;	    STOPPED)   $nova $action $instance;;	    *) error "Cannot $action instance $port in unexpected state: $status"; fence_done 1;;	esac	;;    stop)	state=`status_for_port $instance`	case $state in	    UNKNOWN) 		error "Cannot perform $action action on unknown instance: $port"		fence_done 1		;;	    STOPPED|PAUSED|SUSPENDED) 		# Stop, start, and reboot do not function on a suspended or paused instances		# But for all intensive purposes they are already in a safe state		debug "$instance is $state"		;;	    ACTIVE)    $nova $action $instance;;	    *) error "Cannot perform $action action on instance $port in unexpected state: $status"; fence_done 1;;	esac	;;    *) error "Unknown action: $action"; fence_done 1;;esacfence_done $?
[参考]