Fichiers internes de SafeKit pour l'équilibrage de charge de Apache avec haute disponibilité

Fichiers internes au module Windows apache_farm.safe

userconfig.xml sur Windows (description dans le guide de l'utilisateur)

<!DOCTYPE safe>
<safe>
<macro name="VIRTUAL_IP" value="VIRTUAL_IP_TO_BE_DEFINED" />
<macro name="APACHE_PORT" value="TCP_PORT_TO_BE_DEFINED" />
<service mode="farm" maxloop="3" loop_interval="24">
  <!-- Farm topology configuration for the membership protocol -->
  <!-- Names or IP addresses on the default network are set during initialization in the console -->
  <farm>
    <lan name="default" />
  </farm>
  <!-- Virtual IP Configuration -->
  <!-- Use VIRTUAL_IP defined in macro above -->
  <vip>
    <interface_list>
      <interface check="on" arpreroute="on">
        <virtual_interface type="vmac_directed">
          <virtual_addr addr="%VIRTUAL_IP%" where="alias"/>
        </virtual_interface>
      </interface>
    </interface_list>
    <loadbalancing_list>
      <group name="APACHE">
        <!-- Set load-balancing rule on APACHE_PORT defined in macro above -->
        <rule port="%APACHE_PORT%" proto="tcp" filter="on_addr"/>
      </group>
    </loadbalancing_list>
  </vip>
  <!-- TCP Checker Configuration -->
  <!-- Use VIRTUAL_IP and APACHE_PORT defined in macros above -->
  <check>
    <tcp ident="HTTP_APACHE" when="both">
      <to
         addr="%VIRTUAL_IP%"
         port="%APACHE_PORT%"
         interval="10"
         timeout="5"
       />
    </tcp>
  </check>
  <!-- User scripts activation -->
  <user nicestoptimeout="300" forcestoptimeout="300" logging="userlog" />
</service>
</safe>

start_both.cmd sur Windows

@echo off

rem Script called on all servers for starting applications

rem For logging into SafeKit log use:
rem "%SAFE%\safekit" printi | printe "message"

rem stdout goes into Application log
echo "Running start_both %*" 

set res=0

net start Apache2
if not %errorlevel% == 0 (
  %SAFE%\safekit printi "Apache start failed"
) else (
  %SAFE%\safekit printi "Apache started"
)

set res=%errorlevel%
if %res% == 0 goto end

:stop
set res=%errorlevel%
"%SAFE%\safekit" printe "start_both failed"

rem uncomment to stop SafeKit when critical
rem "%SAFE%\safekit" stop -i "start_both"

:end

stop_both.cmd sur Windows

@echo off

rem Script called on all servers for stopping application

rem For logging into SafeKit log use:
rem "%SAFE%\safekit" printi | printe "message"

rem ----------------------------------------------------------
rem
rem 2 stop modes:
rem
rem - graceful stop
rem   call standard application stop with net stop
rem
rem - force stop (%1=force)
rem   kill application's processes
rem
rem ----------------------------------------------------------

rem stdout goes into Application log
echo "Running stop_both %*" 

set res=0

rem default: no action on forcestop
if "%1" == "force" goto end

%SAFE%\safekit printi "Stopping Apache..."
net stop Apache2

rem If necessary, uncomment to wait for the real stop of services
rem "%SAFEBIN%\sleep" 10

if %res% == 0 goto end

"%SAFE%\safekit" printe "stop_both failed"

:end

Fichiers internes au module Linux apache_farm.safe

userconfig.xml sur Linux (description dans le guide de l'utilisateur)

<!DOCTYPE safe>
<safe>
<macro name="VIRTUAL_IP" value="VIRTUAL_IP_TO_BE_DEFINED" />
<macro name="APACHE_PORT" value="TCP_PORT_TO_BE_DEFINED" />
<service mode="farm" maxloop="3" loop_interval="24">
  <!-- Farm topology configuration for the membership protocol -->
  <!-- Names or IP addresses on the default network are set during initialization in the console -->
  <farm>
    <lan name="default" />
  </farm>
  <!-- Virtual IP Configuration -->
  <!-- Use VIRTUAL_IP defined in macro above -->
  <vip>
    <interface_list>
      <interface check="on" arpreroute="on">
        <virtual_interface type="vmac_directed">
          <virtual_addr addr="%VIRTUAL_IP%" where="alias"/>
        </virtual_interface>
      </interface>
    </interface_list>
    <loadbalancing_list>
      <group name="APACHE">
        <!-- Set load-balancing rule on APACHE_PORT defined in macro above -->
        <rule port="%APACHE_PORT%" proto="tcp" filter="on_addr"/>
      </group>
    </loadbalancing_list>
  </vip>
  <!-- TCP Checker Configuration -->
  <!-- Use VIRTUAL_IP and APACHE_PORT defined in macros above -->
  <check>
    <tcp ident="HTTP_APACHE" when="both">
      <to
         addr="%VIRTUAL_IP%"
         port="%APACHE_PORT%"
         interval="10"
         timeout="5"
       />
    </tcp>
  </check>
  <!-- User scripts activation -->
  <user nicestoptimeout="300" forcestoptimeout="300" logging="userlog" />
</service>
</safe>

start_both sur Linux

#!/bin/sh 
# Script called on the primary server for starting applications 

# For logging into SafeKit log use:
# $SAFE/safekit printi | printe "message" 

#---------- Clean Apache residual processes 
# Call this function before starting Apache 
# to clean eventual resual Apache processes
clean_Apache()
{
  retval=0

  $SAFE/safekit printw "Cleaning Apache processes"

  # kill started Apache processes
  ps -e -o pid,comm | grep httpd | $AWK '{print "kill " $1}'| sh >/dev/null 2>&1

  return $retval
}

#---------- Apache
# Call this function for starting Apache Server
start_Apache()
{
  retval=0

  $SAFE/safekit printw "Starting Apache Server"

  # Apache - Starting 
  service httpd start   
  if [ $? -ne 0 ] ; then 
    $SAFE/safekit printw "Apache server start failed"
  else
    $SAFE/safekit printw "Apache server started"
  fi

  return $retval
}

# stdout goes into Application log
echo "Running start_both $*" 

res=0

[ -z "$OSNAME" ] && OSNAME=`uname -s`
OSNAME=`uname -s`
case "$OSNAME" in
    Linux)
	AWK=/bin/awk
	;;
    *)
	AWK=/usr/bin/awk
	;;
esac

# TODO
# remove Apache boot start 

# Clean Apache residual processes 
clean_Apache || res=$?

# Start Apache
start_Apache || res=$?

if [ $res -ne 0 ] ; then
  $SAFE/safekit printi "start_both failed"

  # uncomment to stop SafeKit when critical
  # $SAFE/safekit stop -i "start_both"
fi

exit 0

stop_both sur Linux

#!/bin/sh
# Script called on the primary server for stopping application services

# For logging into SafeKit log use:
# $SAFE/safekit printi | printe "message" 

#----------------------------------------------------------
#
# 2 stop modes:
#
# - graceful stop
#   call standard application stop
#
# - force stop ($1=force)
#   kill application's processes
#
#----------------------------------------------------------

#---------- Clean Apache residual processes
# Call this function on force stop 
# to clean eventual resual Apache processes 
clean_Apache()
{
  retval=0

  $SAFE/safekit printw "Cleaning Apache processes "

  # kill started Apache 
  ps -e -o pid,comm | grep httpd | $AWK '{print "kill -9 " $1}'| sh >/dev/null 2>&1

  return $retval
}

#---------- Apache
# Call this function for stopping Apache
stop_Apache()
{
  retval=0

  if [ "$1" = "force" ] ; then
    # Apache force stop
    clean_Apache
    return $retval
  fi

  # Apache graceful stop
  $SAFE/safekit printw "Stopping Apache server"  
  service httpd stop
  if [ $? -ne 0 ] ; then 
    $SAFE/safekit printw "Apache server stop failed"
  else
    $SAFE/safekit printw "Apache server stopped"  
  fi

  return $retval
}

# stdout goes into Application log
echo "Running stop_both $*" 

res=0

[ -z "$OSNAME" ] && OSNAME=`uname -s`
case "$OSNAME" in
    Linux)
	AWK=/bin/awk
	;;
    *)
	AWK=/usr/bin/awk
	;;
esac

mode=
if [ "$1" = "force" ] ; then
  mode=force
  shift
fi

# Stop Apache  server 
stop_Apache $mode || res=$?

[ $res -ne 0 ] && $SAFE/safekit printi "stop_both failed"

exit 0