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linux集群服务器软件代码包

#!/bin/sh
#
#	High-Availability Apache/IBMhttp control script
# 
# apache (aka IBMhttpd)
#
# Description:	starts/stops apache web servers.
#
# Author:	Alan Robertson
#		Sun Jiang Dong
#
# Support:	[e-mail]
#
# License:	GNU Lesser General Public License (LGPL)
#
# Copyright:	(C) 2002-2004 International Business Machines
#
#
# An example usage in /etc/ha.d/haresources: 
#       node1  10.0.0.170 apache::/opt/IBMHTTPServer/conf/httpd.conf
#       node1  10.0.0.170 IBMhttpd
#
# Our parsing of the Apache config files is very rudimentary.
# It'll work with lots of different configurations - but not every
# possible configuration.
#
# Patches are being accepted ;-)
#
# OCF parameters:
#  OCF_RESKEY_configfile
#  OCF_RESKEY_httpd
#  OCF_RESKEY_port
#  OCF_RESKEY_statusurl

prefix=@prefix@
exec_prefix=@exec_prefix@

. @hb_libdir@/ocf-shellfuncs

#######################################################################
#
#	Configuration options - usually you don't need to change these
#
#######################################################################
#
IBMHTTPD=/opt/IBMHTTPServer/bin/httpd
HTTPDLIST="/sbin/httpd /usr/sbin/httpd"
WGETNAME=wget
WGETOPTS="-O- -nv"
LOCALHOST="http://localhost"
HTTPDOPTS="-DSTATUS"
DEFAULT_IBMCONFIG=/opt/IBMHTTPServer/conf/httpd.conf
DEFAULT_NORMCONFIG="/etc/httpd/httpd.conf"
#
# You can also set
#	HTTPD
#	PORT
#	STATUSURL
#	CONFIGFILE
# in this section if what we're doing doesn't work for you...
#
#	End of Configuration options
#######################################################################

CMD=`basename $0`

#	The config-file-pathname is the pathname to the configuration
#	file for this web server.  Various appropriate defaults are
#	assumed if no config file is specified.  If this command is
#	invoked as *IBM*, then the default config file name is
#	$DEFAULT_IBMCONFIG, otherwise the default config file
#	will be $DEFAULT_NORMCONFIG.
usage() {
  cat <<-!
usage: $0 action

action:
	start    start the web server

	stop     stop the web server

	status   return the status of web server, run or down

	methods	return the set of commands we support

	monitor  return TRUE if the web server appears to be working.
                For this to be supported you must configure mod_status
		 and give it a server-status URL.  You have to have 
		installed $WGETNAME for this to work.
                We won't return monitor in the methods call if we don't
                know think that the monitor call will actually work ;-)

	meta-data show meta data message
	!
  exit $OCF_ERR_UNIMPLEMENTED
}

methods_apache() {
  cat <<-!
	start
	stop
	status
	methods
	!
  case $HasStatus in
    yes)	echo "monitor";;
  esac
}

#
#	Run:  Run a script, and log its output.
#
run() {
  output=`"$@" 2>&1`
  rc=$?
  output=`echo $output`
  if
    [ $rc -eq 0 ]
  then 
    if
      [ ! -z "$output" ]
    then
      ha_log "info: $output"
    fi
    return $OCF_SUCCESS
  else
    if
      [ ! -z "$output" ]
    then
      ha_log "ERROR: $output"
    else
      ha_log "ERROR: command failed: $*"
    fi
    return $OCF_ERR_GENERIC
  fi
}
#
# Strip comments, and initial blanks. Compress other blanks
#
apachecat() {
    sed -e 's%#.*%%' -e 's%^[ 	]*%%' -e 's%[ 	]+% %g' $1
}

#
# Return the value of a parameter in our apache config file
#
apache_param() {
  configfile=$1
  varname=$2

  if
    apachecat $1 | grep -i "^$varname " | \
        sed -e 's%^[^ ]* %%' -e 's%^"%%' -e 's%"$%%'
  then
     : OK
  else
     false
  fi
}

#
# Return TRUE if the config file supports the given handler somewhere
#
SupportsHandler() {
  apache_param $1 SetHandler | grep "^$2 *" >/dev/null
}

#
#	return true if the given module is loaded...
#
Module_loaded() {
  apache_param $1 AddModule | grep -i "^mod_$2\." >/dev/null
}

#
#	Return the location(s) that are handled by the given handler
#
FindLocationForHandler() {
  PerlScript='while (<>) {
	/<Location "?([^ >"]+)/i && ($loc=$1);
	'"/SetHandler +$2"'/i && print "$loc\n"; 
  }'
  apachecat $1 | perl -e "$PerlScript"
}


#
#	Get all the parameters we need from the Apache config file
#
GetParams() {
  ConfigFile=$1
  ServerRoot=`apache_param $ConfigFile ServerRoot`
  PidFile=`apache_param $ConfigFile PidFile`
  case $PidFile in
    /*)	;;
    *)	PidFile=$ServerRoot/$PidFile;;
  esac
  case "$PORT" in
    [0-9]*)	;;
    *)	PORT=`apache_param $ConfigFile Port`
        case "$PORT" in
          [0-9]*)	;;
	  *)		PORT=80;;
        esac;;
  esac
  if
    WGET=`which $WGETNAME 2>/dev/null`
  then
    : OK
  else
    WGET=""
  fi
  
  #
  # Just because they have mod_status loaded and have a server-status
  # declared doesn't mean they support the status operation.
  #
  # It's actually pretty hard to tell because of run-time defines which
  # could be turned on elsewhere...
  #
  # (we start our server with -DSTATUS - just in case :-))
  #
  # Typically (but not necessarily) the status URL is /server-status
  #
  # For us to think status will work, we have to have the following things:
  #
  # - $WGET has to exist and be executable
  # - The mod_status module must be loaded
  # - The server-status handler has to be mapped to some URL somewhere
  #
  # We assume that:
  #
  # - the "main" web server at $PORT will also support it if we can find it
  #	somewhere in the file
  # - it will be supported at the same URL as the one we find in the file
  #
  # If this doesn't work for you, then set STATUSURL at the top of the file
  #
  HasStatus=no
  if
    [ ! -z "$WGET" -a -x "$WGET" ]	\
    &&	Module_loaded $ConfigFile status	\
    &&	SupportsHandler $ConfigFile server-status
  then
    StatusURL=`FindLocationForHandler $1 server-status | tail -1`
    case "$StatusURL" in
      /*)	HasStatus=yes;;
    esac
    if
       [ "X$STATUSURL" = "X" ]
    then
      STATUSURL="${LOCALHOST}:${PORT}$StatusURL"
    fi
  fi
  if
    [ -z "$PidFile"  -o ! -f $ConfigFile ]
  then
    false
  else
    true
  fi

}

#
# return TRUE if a process with given PID is running
#
ProcessRunning() {
    ApachePID=$1
    # Use /proc if it looks like it's here...
    if
      [ -d /proc -a -d /proc/1 ]
    then
       [ -d /proc/$ApachePID ]
    else
      #  This assumes we're running as root...
      kill -0 "$ApachePID" >/dev/null 2>&1
    fi
}


silent_status() {
  if
    [ -f $PidFile  ] 
  then
    ProcessRunning `cat $PidFile`
  else
    : No pid file
    false
  fi
}

start_apache() {
  if
    silent_status
  then
    echo "$CMD already running (pid $ApachePID)"
    return $OCF_SUCCESS
  fi
  run $HTTPD $HTTPDOPTS -f $CONFIGFILE
}

stop_apache() {
  if
    silent_status
  then
    if
      kill $ApachePID
    then
      tries=0
      while
        ProcessRunning $ApachePID &&
        [ $tries -lt 10 ]
      do
        sleep 1
        kill $ApachePID >/dev/null 2>&1
        ha_log "Killing apache PID $ApachePID"
        tries=`expr $tries + 1`
      done
    else
      ha_log "Killing apache PID $ApachePID FAILED."
    fi
    if
      ProcessRunning $ApachePID
    then
      echo "$CMD still running ($ApachePID)."
      ha_log "$CMD still running ($ApachePID)."
      false
    else
      echo "$CMD stopped."
    fi
  else
    echo "$CMD not running."
    ha_log "$CMD is not running."
  fi
}

status_apache() {
  silent_status
  rc=$?
  if
    [ $rc -eq 0 ]
  then
    echo "$CMD is running (pid $ApachePID)."
  else
    echo "$CMD is stopped."
  fi
  return $rc
}


monitor_apache() {
  case $HasStatus in
    no)	echo "Monitoring not supported by $CONFIGFILE"
	return $OCF_ERR_CONFIGURED;;
  esac
  if
    silent_status
  then
    run sh -c "$WGET $WGETOPTS $STATUSURL | grep -i '</ *body *></ *html *>' >/dev/null"
  else
    echo "$CMD not running"
    return $OCF_ERR_GENERIC;
  fi
}

metadata_apache(){
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="apache" version="1.0">
<version>1.0</version>

<parameters>
<parameter name="configfile">
<longdesc lang="en">
The fullpath name of configure file.It's a string of path
name. Other parameters can contain in this file.
</longdesc>
<shortdesc lang="en">configure file path</shortdesc>
<content type="string" default="/opt/IBMHTTPServer/conf/httpd.conf or /etc/httpd/httpd.conf" />
</parameter>

<parameter name="httpd">
<longdesc lang="en">
The fullpath name of the executable binary httpd.It's a string of path
name. It's optional.
</longdesc>
<shortdesc lang="en">httpd executable binary path</shortdesc>
<content type="string" default="/usr/sbin/httpd" />
</parameter>

<parameter name="port" unique="1">
<longdesc lang="en">
The number of port, on that port apache instance provide service.
It's a string of number. Also can get from file.
the "main" web server at $PORT will also support it if we can find it
somewhere in the file.
it will be supported at the same URL as the one we find in the file
</longdesc>
<shortdesc lang="en">apache port number</shortdesc>
<content type="string" default="80"/>
</parameter>

<parameter name="statusurl" unique="2">
<longdesc lang="en">
The url of the apache instance. It's a string.
Also can get from file.
</longdesc>
<shortdesc lang="en">url name</shortdesc>
<content type="integer" default=""/>
</parameter>

</parameters>

<actions>
<action name="start"   timeout="90" />
<action name="stop"    timeout="100" />
<action name="status"  timeout="30" />
<action name="monitor" depth="0"  timeout="20" interval="10" start-delay="1m" />
<action name="meta-data"  timeout="5" />
</actions>
</resource-agent>
END

	exit $OCF_SUCCESS
}

if
  [ $# -eq 1 ]
then
  COMMAND=$1
  HTTPD="$OCF_RESKEY_httpd"
  PORT="$OCF_RESKEY_port"
  STATUSURL="$OCF_RESKEY_statusurl"
  CONFIGFILE="$OCF_RESKEY_configfile"
else
  echo "Parameter error."
  exit $OCF_ERR_ARGS
fi

if
  [ "X$HTTPD" = X -o ! -f "$HTTPD" -o ! -x "$HTTPD" ]
then
  case $0 in
    *IBM*)	HTTPD=$IBMHTTPD
		DefaultConfig=$DEFAULT_IBMCONFIG;;
    *)	for h in $HTTPDLIST
	do
	  if
	    [ -f $h -a -x $h ]
	  then
	    HTTPD=$h
	    break
	  fi
	done
	DefaultConfig=$DEFAULT_NORMCONFIG;;
  esac
fi

case "$CONFIGFILE" in
  "") CONFIGFILE=$DefaultConfig;;
  *)		;;
esac

if
  [ ! -f "$CONFIGFILE" -a "X$COMMAND" = Xstop ]
then
  echo "$CONFIGFILE not found - apache considered stopped"
  exit $OCF_SUCCESS
fi

if
  GetParams $CONFIGFILE
then
  : OK
else
  echo "Cannot parse config file [$CONFIGFILE]"
  exit $OCF_ERR_ARGS
fi

case $COMMAND in
  start)	start_apache;;
  stop)		stop_apache;;
  status)	status_apache;;
  methods)	methods_apache;;
  monitor)	monitor_apache;;
  meta-data)	metadata_apache;;
  *)		usage;;
esac