Fichiers internes à SafeKit pour la haute disponibilité de MySQL avec réplication temps réel synchrone et tolérance aux pannes

Fichiers internes au module Windows mysql.safe

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

<!DOCTYPE safe>
<safe>
<service mode="mirror" defaultprim="alone" maxloop="3" loop_interval="24" failover="on">
  <!-- Heartbeat Configuration -->
  <!-- Names or IP addresses on the default network are set during initialization in the console -->
  <heart pulse="700" timeout="30000">
    <heartbeat name="default" ident="flow">
    </heartbeat>
  </heart>
  <!-- Virtual IP Configuration -->
  <!-- Replace
     * VIRTUAL_TO_BE_DEFINED by the name of your virtual server 
  -->
  <vip>
    <interface_list>
        <interface check="on" arpreroute="on"> 
	  <real_interface>
               <virtual_addr addr="VIRTUAL_TO_BE_DEFINED" where="one_side_alias" />
          </real_interface>
        </interface>
    </interface_list>
  </vip>
  <!-- Software Error Detection Configuration -->
  <errd polltimer="10">
    <!-- MySQL Server -->
    <proc name="mysqld.exe" atleast="1" action="restart" class="prim" />
  </errd>
  <!-- File Replication Configuration -->
  <!-- 
     * C:\ProgramData\MySQL\MySQL Server 5.7: default directory containing MySQL database and logs
  -->
  <rfs async="second" acl="off" nbrei="3">
	<replicated dir="C:\ProgramData\MySQL\MySQL Server 5.7" mode="read_only" />
  </rfs>
  <!-- User scripts activation -->
  <user nicestoptimeout="300" forcestoptimeout="300" logging="userlog" />
</service>
</safe>

start_prim.cmd sur Windows

@echo off
rem Script called on the primary server for starting application services 

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

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

set res=0

net start mysql > nul
if not %errorlevel% == 0 (
  %SAFE%\safekit printi "MySQL start failed"
) else (
  %SAFE%\safekit printi "MySQL started"
)

if %res% == 0 goto end

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

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

:end

stop_prim.cmd sur Windows

@echo off
rem Script called on the primary server for stopping application services 

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

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

set res=0

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

%SAFE%\safekit printi "Stopping MySQL..."
net stop mysql > nul

rem wait a little for a real stop of services
%SAFEBIN%\sleep 10

:end

Fichiers internes au module Linux mysql.safe

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

<!DOCTYPE safe>
<safe>
<service mode="mirror" defaultprim="alone" maxloop="3" loop_interval="24" failover="on">
  <!-- Heartbeat Configuration -->
  <!-- Names or IP addresses on the default network are set during initialization in the console -->
  <heart pulse="700" timeout="30000">
    <heartbeat name="default" ident="flow">
    </heartbeat>
  </heart>
  <!-- Virtual IP Configuration -->
  <!-- Replace
     * VIRTUAL_TO_BE_DEFINED by the name of your virtual server 
  -->
  <vip>
    <interface_list>
        <interface check="on" arpreroute="on"> 
	  <real_interface>
               <virtual_addr addr="VIRTUAL_TO_BE_DEFINED" where="one_side_alias"/>
          </real_interface>
        </interface>
    </interface_list>
  </vip>
  <!-- Software Error Detection Configuration -->
  <errd polltimer="10">
    <!-- MySQL Server -->
    <proc name="mysqld" atleast="1" action="restart" class="prim" />
  </errd>
  <!-- File Replication Configuration -->
  <!--
     * /var/lib/mysql: default directory of MySQL database and logs
  -->
  <rfs mountover="off" async="second" acl="off" nbrei="3">
	<replicated dir="/var/lib/mysql" mode="read_only" />
  </rfs>
  <!-- User scripts activation -->
  <user nicestoptimeout="300" forcestoptimeout="300" logging="userlog" />
</service>
</safe>

start_prim 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 MYSQL residual processes 
# Call this function before starting any MySQL databases 
# to clean eventual resual MySQL processes
clean_mysql()
{
  retval=0

  $SAFE/safekit printw "Cleaning MySQL processes"

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

  return $retval
}

#---------- MySQL Databases
# Call this function for starting MySQL Server
start_MySQL()
{
  retval=0

  $SAFE/safekit printw "Starting MySQL Server"

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

  return $retval
}

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

res=0

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

# TODO
# remove MySQL boot start 

# Clean MySQL residual processes 
clean_mysql || res=$?

# Start MySQL databases
start_MySQL || res=$?

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

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

exit 0

stop_prim 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 MySQL residual processes
# Call this function on force stop 
# to clean eventual resual MySQL processes 
clean_mysql()
{
  retval=0

  $SAFE/safekit printw "Cleaning MySQL processes "

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

  return $retval
}

#---------- MySQL databases
# Call this function for stopping MySQL databases
stop_MySQL()
{
  retval=0

  if [ "$1" = "force" ] ; then
    # MySQL databases force stop
    clean_mysql
    return $retval
  fi

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

  return $retval
}

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

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 MySQL  server 
stop_MySQL $mode || res=$?

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

exit 0