mysqld_safe-watch.sh
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
源码类别:
MySQL数据库
开发平台:
Visual C++
- #!/bin/sh
- # Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
- # This file is public domain and comes with NO WARRANTY of any kind
- #
- # scripts to start the MySQL demon and restart it if it dies unexpectedly
- #
- # This should be executed in the MySQL base directory if you are using a
- # binary installation that has other paths than you are using.
- #
- # mysql.server works by first doing a cd to the base directory and from there
- # executing mysqld_safe
- # Check if we are starting this relative (for the binary release)
- if test -f ./data/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a
- -x ./bin/mysqld
- then
- MY_BASEDIR_VERSION=`pwd` # Where bin, share and data is
- DATADIR=$MY_BASEDIR_VERSION/data # Where the databases are
- ledir=$MY_BASEDIR_VERSION/bin # Where mysqld are
- # Check if this is a 'moved install directory'
- elif test -f ./var/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a
- -x ./libexec/mysqld
- then
- MY_BASEDIR_VERSION=`pwd` # Where libexec, share and var is
- DATADIR=$MY_BASEDIR_VERSION/var # Where the databases are
- ledir=$MY_BASEDIR_VERSION/libexec # Where mysqld are
- else
- MY_BASEDIR_VERSION=/usr/local/mysql
- DATADIR=/usr/local/mysql/var
- ledir=/usr/local/mysql/libexec
- fi
- hostname=`@HOSTNAME@`
- pidfile=$DATADIR/$hostname.pid
- log=$DATADIR/$hostname.log
- err=$DATADIR/$hostname.err
- lockfile=$DATADIR/$hostname.lock
- #
- # If there exists an old pid file, check if the demon is already running
- # Note: The switches to 'ps' may depend on your operating system
- if test -f $pidfile
- then
- PID=`cat $pidfile`
- if /bin/kill -0 $PID
- then
- if /bin/ps -p $PID | grep mysqld > /dev/null
- then # The pid contains a mysqld process
- echo "A mysqld process already exists"
- echo "A mysqld process already exists at " `date` >> $log
- exit 1;
- fi
- fi
- rm -f $pidfile
- if test -f $pidfile
- then
- echo "Fatal error: Can't remove the pid file: $pidfile"
- echo "Fatal error: Can't remove the pid file: $pidfile at " `date` >> $log
- echo "Please remove it manually and start $0 again"
- echo "mysqld demon not started"
- exit 1;
- fi
- fi
- echo "Starting mysqld demon with databases from $DATADIR"
- #Default communication ports
- #MYSQL_TCP_PORT=3306
- if test -z "$MYSQL_UNIX_PORT"
- then
- MYSQL_UNIX_PORT="/tmp/mysql.sock"
- export MYSQL_UNIX_PORT
- fi
- #export MYSQL_TCP_PORT
- # Does this work on all systems?
- #if type ulimit | grep "shell builtin" > /dev/null
- #then
- # ulimit -n 256 > /dev/null 2>&1 # Fix for BSD and FreeBSD systems
- #fi
- echo "mysqld started on " `date` >> $log
- bin/zap -f $lockfile < /dev/null > /dev/null 2>&1
- rm -f $lockfile
- $MY_BASEDIR_VERSION/bin/watchdog_mysqld $lockfile $pidfile $MY_BASEDIR_VERSION/bin $DATADIR 3 10 >> $err 2>&1 &
- restart_pid=$!
- while true
- do
- rm -f $MYSQL_UNIX_PORT $pidfile # Some extra safety
- lockfile -1 -r10 $lockfile >/dev/null 2>&1
- if test "$#" -eq 0
- then
- nohup $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR
- --skip-locking >> $err 2>&1 &
- else
- nohup $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR
- --skip-locking "$@" >> $err 2>&1 &
- fi
- pid=$!
- rm -f $lockfile
- wait $pid;
- lockfile -1 -r10 $lockfile >/dev/null 2>&1
- rm -f $lockfile
- if test ! -f $pidfile # This is removed if normal shutdown
- then
- break;
- fi
- if true
- then
- # Test if one proces was hanging.
- # This is only a fix for Linux (running as base 3 mysqld processes)
- # but should work for the rest of the servers.
- # The only thing is ps x => redhat 5 gives warnings when using ps -x.
- # kill -9 is used or the proces won't react on the kill.
- numofproces=`ps x | grep -v "grep" | grep -c $ledir/mysqld`
- echo -e "nNumber of processes running now: $numofproces" | tee -a $log
- I=1
- while test "$I" -le "$numofproces"
- do
- PROC=`ps x | grep $ledir/mysqld | grep -v "grep" | tail -1`
- for T in $PROC
- do
- break
- done
- # echo "TEST $I - $T **"
- if kill -9 $T
- then
- echo "mysqld proces hanging, pid $T - killed" | tee -a $log
- else
- break
- fi
- I=`expr $I + 1`
- done
- fi
- echo "mysqld restarted" | tee -a $log
- # Check all tables and repair any wrong tables.
- $MY_BASEDIR_VERSION/bin/isamchk -sf $DATADIR/*/*.ISM >> $err 2>&1
- done
- if test $restart_pid -gt 0
- then
- kill $restart_pid > /dev/null 2>&1
- sleep 1;
- kill -9 $restart_pid > /dev/null 2>&1
- fi
- echo -n "mysqld ended on " `date` >> $log
- echo "mysqld demon ended"