- release 2

[packages/percona-server.git] / mysql.init

#!/bin/sh
#
# mysql		A very fast and reliable SQL database engine
#
# chkconfig:	2345 84 25
#
# description:  A very fast and reliable SQL database engine.
#
# $Id$

# Source function library
. /etc/rc.d/init.d/functions

# Get network config
. /etc/sysconfig/network

# Get service config
if [ -f /etc/sysconfig/mysql ]; then
	. /etc/sysconfig/mysql
else
	nls "Error: %s not found" /etc/sysconfig/mysql
	nls "%s can't be run." MySQL
	exit 1
fi

if [ -n "$MYSQL_DB_CLUSTERS" ]; then
	nls "Warning: MYSQL_DB_CLUSTERS is set. It's obsolete. Use %s instead." /etc/mysql/clusters.conf
fi

if [ -f /etc/mysql/clusters.conf ]; then
	MYSQL_DB_CLUSTERS=$(awk -F= '!/^#/{print $2}' /etc/mysql/clusters.conf)
	if [ -z "$MYSQL_DB_CLUSTERS"  ]; then
		nls "Warning: there are no configured clusters."
	fi

else
	nls "Warning: Missing clusters config file %s" /etc/mysql/clusters.conf
	if [ -z "$MYSQL_DB_CLUSTERS"  ]; then
		nls "Warning: there are no configured clusters."
		nls "Using default cluster /var/lib/mysql (compatibility mode)"
		MYSQL_DB_CLUSTERS=/var/lib/mysql
	fi
fi


# Check that networking is up
if is_yes "${NETWORKING}"; then
	if [ ! -f /var/lock/subsys/network -a "$1" != stop -a "$1" != status -a "$1" != init ]; then
		msg_network_down MySQL
		exit 1
	fi
else
	exit 0
fi

action="$1"

# any db cluster as command line argument?
if [ $# -gt 1 ]; then
	shift
	# perform action for specified clusters only
	for a in "$@"; do
		# try auto resolving from /etc/mysql/clusters.conf
		if [[ "$a" != /* ]]; then
			m=$(awk -va="$a" -F= 'substr($0, 1, length(a)) == a {print $1}' /etc/mysql/clusters.conf)
			if [ -z "$m" ]; then
				echo >&2 "Cluster name '$a' did not match anything!"
				exit 1
			fi
			if [ $(echo "$m" | wc -l) -gt 1 ]; then
				echo >&2 "Cluster name '$a' ambiguous:" $m
				exit 1
			fi
			a=$(awk -va="$a" -F= 'substr($0, 1, length(a)) == a {print $2}' /etc/mysql/clusters.conf)
		fi
		DB_CLUSTERS="$DB_CLUSTERS $a"
	done
else
	DB_CLUSTERS="$MYSQL_DB_CLUSTERS"
fi

# global error log, if mysqld.conf hasn't migrated to log-error style
MYSQL_ERRLOG=/var/log/mysql/mysqld.log
MYSQL_STOP_WAIT_TIME=${MYSQL_STOP_WAIT_TIME:-900}

#
# Useful functions.
#

#
# check for mysql status
#
# arguments:
# $1 - db cluster
# $2 - start|stop
#
# sets variables:
# MYSQL_STATUS = starting | running | not running | died
# MYSQL_PID    = pid of mysqld process
#
mysqlstatus() {
	clusterdir="$1"
	mode="$2"
	
	mysqlgetconfig "$clusterdir"

	MYSQL_STATUS="not running"
	MYSQL_PID="unknown"
	MYSQL_PIDFILE_PID=""
	MYSQL_GREP_PID=""

	if [ -f "$MYSQL_PIDFILE" ]; then
		MYSQL_PIDFILE_PID=$(cat "$MYSQL_PIDFILE")
	fi
	
	if [ -n "$MYSQL_PIDFILE_PID" ]; then
		MYSQL_PID=$MYSQL_PIDFILE_PID
		if [ ! -d "/proc/$MYSQL_PID" ]; then
			MYSQL_STATUS="died"
			return
		elif (grep -qa "$MYSQL_PIDFILE" /proc/$MYSQL_PID/cmdline 2> /dev/null); then
			MYSQL_STATUS="running"
			return
		fi
	fi

	if [ "$mode" = "start" ]; then
		MYSQL_GREP_PID=$(grep -lE "^/usr/sbin/mysqld.*${MYSQL_PIDFILE}" /proc/[0-9]*/cmdline 2> /dev/null | awk -F "/" '{ print $3; exit; }')
		if [ -n "$MYSQL_GREP_PID" ]; then
			MYSQL_PID=$MYSQL_GREP_PID
			if grep -qa "$MYSQL_PIDFILE" /proc/$MYSQL_PID/cmdline 2> /dev/null; then
				if [ -f "$MYSQL_PIDFILE" ]; then
					MYSQL_PIDFILE_PID=$(cat "$MYSQL_PIDFILE")
				fi
				if [ -n "$MYSQL_PIDFILE_PID" ]; then
					MYSQL_PID=$MYSQL_PIDFILE_PID
					MYSQL_STATUS="running"
					return
				else
					MYSQL_STATUS="starting"
					return
				fi
			fi
		fi
	fi

	# else default, "not running"
}

# get mysql configuration in variables
# MYSQL_CONFIG MYSQL_CLUSTER_DIR
# MYSQL_DATA_DIR MYSQL_USER MYSQL_PIDFILE MYSQL_SOCKET MYSQL_PORT MYSQL_BIND_ADDRESS MYSQL_SKIP_NETWORKING MYSQL_LOG_ERROR
#
# arguments
# $1 - db cluster

mysqlgetconfig() {
	local clusterdir="$1" config_file

	# emulate old behaviour if only one cluster specified
	if [ "$clusterdir" = "$MYSQL_DB_CLUSTERS" -a "$clusterdir" = "/var/lib/mysql" -a -f /etc/mysqld.conf ]; then
		MYSQL_RA_COMPAT=yes
		config_file=/etc/mysqld.conf
	else
		local config=$(awk -F= -vclusterdir="$clusterdir" '!/^#/{ if (clusterdir == $2) print $1}' /etc/mysql/clusters.conf)
		if [[ $config = /* ]]; then
			config_file="$config"
		elif [ -f "/etc/mysql/$config" ]; then
			config_file="/etc/mysql/$config"
		else
			config_file="$clusterdir/mysqld.conf"
		fi
	fi

	MYSQL_CLUSTER_DIR="$clusterdir"

	if [ -z "$config_file" ]; then
		nls "Error: Can't find config file for %s cluster" "$clusterdir"
		exit 6
	else
		MYSQL_CONFIG="$config_file"
	fi

	if [ ! -f "$config_file" ]; then
		nls "Error: config file %s not found" "$config_file"
		nls "MySQL can't be run. Did you initialize DB by doing \`$0 init'?"
		exit 6
	fi

	# reset to initial state
	MYSQL_DATA_DIR= MYSQL_USER= MYSQL_PIDFILE= MYSQL_SOCKET= MYSQL_PORT= MYSQL_BIND_ADDRESS= MYSQL_SKIP_NETWORKING= MYSQL_LOG_ERROR=

	eval `awk -F= '
	# skip comments and empty lines
	/^[;#]|^ *$/ { next }

	/^[ \t]*\[.*\][ \t]*$/ {
		match($0, /\[.*\]/);
		section = substr($0, RSTART + 1, RSTART + RLENGTH - 3);
		next;
	}

	# trim spaces
	{
		gsub(/^[\t ]*|[\t ]*$/, "", $1);
		gsub(/^[\t ]*|[\t ]*$/, "", $2);
	}

	section == "mysqld" {
		if ($1 == "datadir") {
			printf("MYSQL_DATA_DIR=%s;", $2);
		} else if ($1 == "user") {
			printf("MYSQL_USER=%s;", $2);
		} else if ($1 == "pid-file") {
			printf("MYSQL_PIDFILE=%s;", $2);
		} else if ($1 == "socket") {
			printf("MYSQL_SOCKET=%s;", $2);
		} else if ($1 == "port") {
			printf("MYSQL_PORT=%s;", $2);
		} else if ($1 == "bind-address") {
			printf("MYSQL_BIND_ADDRESS=%s;", $2);
		} else if ($1 == "skip-networking") {
			printf("MYSQL_SKIP_NETWORKING=1;");
		} else if ($1 == "log-error") {
			printf("MYSQL_LOG_ERROR=%s;", $2);
		}
	}
	' $config_file`

	# error log not defined in config file. add one
	if [ -z "$MYSQL_LOG_ERROR" ]; then
		MYSQL_LOG_ERROR=$MYSQL_ERRLOG
	else
		# unset, so mysqld would use value from config itself
		unset MYSQL_LOG_ERROR
	fi

	if is_yes "$MYSQL_RA_COMPAT"; then
		MYSQL_DATA_DIR_SUB=""
	else
		MYSQL_DATA_DIR_SUB="/mysqldb"
	fi

	if [ -z "$MYSQL_DATA_DIR" -o "$MYSQL_DATA_DIR" != "${clusterdir}${MYSQL_DATA_DIR_SUB}/db" ]; then
		nls "Error: datadir specified in %s should be %s" "$config_file" "$clusterdir${MYSQL_DATA_DIR_SUB}/db"
		nls " MySQL can't be run."
		exit 6
	fi

	if [ -z "$MYSQL_PIDFILE" -o "$MYSQL_PIDFILE" != "$clusterdir${MYSQL_DATA_DIR_SUB}/mysql.pid" ]; then
		nls "Error: pid-file specified in %s should be %s" "$config_file" "$clusterdir${MYSQL_DATA_DIR_SUB}/mysql.pid"
		nls " MySQL can't be run."
		exit 6
	fi

	if [ -z "$MYSQL_USER" ]; then
		echo "$(nls 'MySQL user not configured properly')"'!' >&2
		nls "Edit %s and configure it." "$config_file" >&2
		exit 6
	fi
}

# start mysql
mysqlstart() {
	local clusterdir="$1"
	mysqlgetconfig "$clusterdir"
	if [ ! -d "$MYSQL_DATA_DIR/mysql" ]; then
		nls "MySQL cluster %s not initialized." "$clusterdir"
		nls "Try \`%s init %s' before start." "$0" "$clusterdir"
		exit 6
	fi

	msg_starting "MySQL $clusterdir"; busy
	[ -z "$DEFAULT_SERVICE_RUN_NICE_LEVEL" ] && DEFAULT_SERVICE_RUN_NICE_LEVEL=0
	rm -f "$MYSQL_PIDFILE"


	TMPDIR=/tmp nice -n ${SERVICE_RUN_NICE_LEVEL:-$DEFAULT_SERVICE_RUN_NICE_LEVEL} \
		/usr/bin/setsid /usr/sbin/mysqld \
			--defaults-file=$MYSQL_CONFIG \
			--datadir=$MYSQL_DATA_DIR \
			--pid-file=$MYSQL_PIDFILE \
			${MYSQL_LOG_ERROR:+--log-error="$MYSQL_LOG_ERROR"} \
			$MYSQL_OPTIONS &
	pid=$!

	sleep 0.1
	mysqlstatus "$clusterdir" start
	# it takes longer for mysqld to start and create pidfile if it has to recover innodb transactions
	if [ "$MYSQL_STATUS" = "starting" ]; then
		echo ""
		show "Waiting for MySQL to start"
		busy

		# while the pid is running, mysql is starting up
		# if the pidfile was created, it started up successfully
		# if either case fails we break and report status
		while true; do
			[ -d /proc/$pid ] || break
			[ -f "$MYSQL_PIDFILE" ] && break
			sleep 0.2
		done
	fi

	mysqlstatus "$clusterdir" start
	if [ "$MYSQL_STATUS" = "running" -a "$MYSQL_PID" != "unknown" ]; then
		ok
	elif [ "$MYSQL_STATUS" = "died" ]; then
		RETVAL=1
		died
	else
		RETVAL=1
		fail
	fi
}

# stop mysql
mysqlstop() {
	local clusterdir="$1"
	mysqlstatus "$clusterdir" stop
	msg_stopping "MySQL $clusterdir"
	busy

	# try graceful shutdown -- send shutdown command
	# requires mysql_sysadmin user proper privs
	/usr/bin/mysqladmin --defaults-file=$MYSQL_CONFIG ${MYSQL_SOCKET:+--socket=$MYSQL_SOCKET} shutdown >/dev/null 2>&1
	mysqlstatus "$clusterdir" stop

	if [ "$MYSQL_PID" != "unknown" ]; then
		kill -TERM "$MYSQL_PID" 2> /dev/null
		for nr in $(seq 1 $(($MYSQL_STOP_WAIT_TIME*10))); do
			[ -d "/proc/$MYSQL_PID" ] || break
			sleep 0.1
		done
	fi
	
	mysqlstatus "$clusterdir" stop
	if [ "$MYSQL_STATUS" = "died" ]; then
		died
	elif [ "$MYSQL_STATUS" = "running" -o "$MYSQL_STATUS" = "starting" ]; then
		fail
	else
		ok
	fi
}

#
# check for running mysql instances; if any instance is running then
# create subsys lock file
#
mysqlsubsys() {
	# check for every defined db cluster in sysconfig file
	for mysqldir in $DB_CLUSTERS; do
		mysqlstatus "$mysqldir"
		if [ "$MYSQL_STATUS" = "running" ]; then
			touch /var/lock/subsys/mysql
			return
		fi
	done
	rm -f /var/lock/subsys/mysql
}

mysqlinit() {
	local clusterdir="$1"

	if [ -f /etc/mysqld.conf ]; then
		nls "Running in \`no cluster compat' mode: can't initialize database."
		nls "Move /etc/mysqld.conf away and rerun \`$0 init' (new config will be in $clusterdir)."
		exit 1
	fi

	if [ -f "$clusterdir/mysqld.conf" ]; then
		mysqlgetconfig "$clusterdir"
	else
		MYSQL_USER="mysql"
		MYSQL_CLUSTER_DIR="$clusterdir"
		MYSQL_DATA_DIR="$clusterdir/mysqldb/db"
		MYSQL_PIDFILE="$clusterdir/mysqldb/mysql.pid"
		MYSQL_SOCKET="$clusterdir/mysqldb/mysql.sock"

		# this $MYSQL_CONFIG will be created later
		MYSQL_CONFIG="$MYSQL_CLUSTER_DIR/mysqld.conf"
	fi

	show "Initializing cluster %s" "$clusterdir"; echo

	# Check if not exist init database
	if [ -d "$MYSQL_DATA_DIR/mysql" ]; then
		nls "Seems that database is initialized now. Remove by hand %s" "$MYSQL_DATA_DIR/mysql"
		nls "before initializing database."
		nls "For now skipping cluster %s." "$clusterdir"
		return
	fi

	show "Installing MySQL system tables for $MYSQL_DATA_DIR"
	busy
	TMP=/tmp TMPDIR=/tmp

	mkdir -p "$MYSQL_DATA_DIR" > /dev/null 2>&1
	# Using mysql:mysql for MYSQL_CLUSTER_DIR is creating SECURITY hole, root:root is proper
	chown root:root "$MYSQL_CLUSTER_DIR"
	chown mysql:mysql "$MYSQL_CLUSTER_DIR/mysqldb" "$MYSQL_DATA_DIR" > /dev/null 2>&1
	chmod 751 "$MYSQL_CLUSTER_DIR" "$MYSQL_CLUSTER_DIR/mysqldb"

	if [ -f /usr/share/mysql/mysqld.conf -a ! -f "$MYSQL_CLUSTER_DIR/mysqld.conf" ]; then
	    sed -e "
		s#\(datadir.*\)=.*#\1= $MYSQL_DATA_DIR#g;
		s#\(pid-file.*\)=.*#\1= $MYSQL_PIDFILE#g;
		s#\(socket.*\)=.*#\1= $MYSQL_SOCKET#g;
		s#@clusterdir@#$MYSQL_CLUSTER_DIR#g;
		" /usr/share/mysql/mysqld.conf > "$MYSQL_CLUSTER_DIR/mysqld.conf"
	    chown root:root "$MYSQL_CLUSTER_DIR/mysqld.conf"
	    chmod 640 "$MYSQL_CLUSTER_DIR/mysqld.conf"
	fi

	if [ ! -e /var/lib/mysql/mysql.sock ] || [ -L /var/lib/mysql/mysql.sock ] && [ -z "$(readlink /var/lib/mysql/mysql.sock)" ]; then
		sock=${MYSQL_SOCKET#/var/lib/mysql/} # make it relative if possible
	    ln -s "$sock" /var/lib/mysql/mysql.sock
	fi

	cat > $MYSQL_DATA_DIR/mysql-init.sql <<-EOF
		CREATE DATABASE mysql;
		use mysql;
		$(cat /usr/share/mysql/mysql_system_tables.sql)
		$(sed -e "/@current_hostname/d" /usr/share/mysql/mysql_system_tables_data.sql)
EOF

	ok=0
	/usr/sbin/mysqld \
		--defaults-file=$MYSQL_CLUSTER_DIR/mysqld.conf \
		--bootstrap \
		--skip-grant-tables \
		--skip-innodb \
		--datadir=$MYSQL_DATA_DIR \
		--user=$MYSQL_USER \
		--slave-load-tmpdir=$MYSQL_DATA_DIR \
		--tmpdir=$MYSQL_DATA_DIR \
		--log-error=$MYSQL_ERRLOG \
		< $MYSQL_DATA_DIR/mysql-init.sql && ok=1
	[ -f $MYSQL_DATA_DIR/mysql/host.frm ] || ok=0

	if [ "$ok" = 1 ]; then
		rm -f $MYSQL_DATA_DIR/mysql-init.sql
		ok
		cat << END_OF_MSG

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL USERS!
This is done, after starting database, in the order shown,
with:

For 'mysql_sysadmin' (RELOAD and SHUTDOWN privileges):
echo "update mysql.user set password=password('newpassword') where user='mysql_sysadmin'; FLUSH PRIVILEGES;" | mysql -u mysql -S $MYSQL_SOCKET

For 'mysql' user (ALL privileges, DB admin):
echo "update mysql.user set password=password('newpassword') where user='mysql'; FLUSH PRIVILEGES;" | mysql -u mysql -S $MYSQL_SOCKET

NOTE: mysql_sysadmin password should be placed to $MYSQL_CONFIG in
mysqladmin section. See the manual for more instructions.
(This user is used at logs rotation and server shutdown)

END_OF_MSG
		show "Filling help tables..."
		ok=0
		( echo "use mysql;"; cat /usr/share/mysql/fill_help_tables.sql ) | \
			/usr/sbin/mysqld \
			--defaults-file=$MYSQL_CLUSTER_DIR/mysqld.conf \
			--bootstrap \
			--skip-grant-tables \
			--skip-innodb \
			--datadir=$MYSQL_DATA_DIR \
			--user=$MYSQL_USER \
			--slave-load-tmpdir=$MYSQL_DATA_DIR \
			--tmpdir=$MYSQL_DATA_DIR \
			--log-error=$MYSQL_ERRLOG \
			&& ok=1
		if [ "$ok" = 1 ]; then
			ok
		else
			cat << END_OF_MSG

WARNING: HELP FILES ARE NOT COMPLETELY INSTALLED!
The "HELP" command might not work properly.

END_OF_MSG
		fi
	else
		fail
		cat << END_OF_MSG
Installation of grant tables FAILED!

The initialization SQL script was preserved at $MYSQL_DATA_DIR/mysql-init.sql

Examine the logs in /var/log/mysql for more information.  You can
also try to start the mysqld daemon with:

/usr/sbin/mysqld --skip-grant &

You can use the command line tool mysql to connect to the mysql
database and look at the grant tables:

shell> mysql -u mysql mysql
mysql> show tables

Try 'mysqld --help' if you have problems with paths. Setting on
logging in $MYSQL_DATA_DIR/mysqld.conf gives you a log in /var/log/mysql/query.log that
may be helpful. The latest information about MySQL is available on the
web at http://www.mysql.com/.

Please check PLD Linux ftp site for newer versions of this package.

Please consult the MySQL manual section: 'Problems running
mysql_install_db', and the manual section that describes problems on
your OS.  Another information source is the MySQL email archive.

END_OF_MSG
		exit 1
	fi
}

#
# End of useful functions.
#

start() {
	local mysqldir
	for mysqldir in $DB_CLUSTERS; do
		mysqlstatus "$mysqldir" start
		if [ "$MYSQL_STATUS" = "running" ]; then
			msg_already_running "MySQL $mysqldir"
		else
			mysqlstart "$mysqldir"
		fi
	done
	mysqlsubsys
}

stop() {
	local mysqldir
	for mysqldir in $DB_CLUSTERS; do
		mysqlstatus "$mysqldir" stop
		if [ "$MYSQL_STATUS" = "not running" ]; then
			msg_not_running "MySQL $mysqldir"
		else
			mysqlstop "$mysqldir"
		fi
	done
	mysqlsubsys
}

condrestart() {
	if [ ! -f /var/lock/subsys/mysql ]; then
		msg_not_running "MySQL"
		RETVAL=$1
		return
	fi

	stop
	start
}

RETVAL=0
case "$action" in
  start)
	start
	;;
  stop)
	stop
	;;
  restart)
	stop
	start
	;;
  try-restart)
	condrestart 0
	;;
  force-reload)
	condrestart 7
	;;
  init)
	for mysqldir in $DB_CLUSTERS; do
		mysqlinit "$mysqldir"
	done
	exit $?
	;;
  flush-logs)
	for mysqldir in $DB_CLUSTERS; do
	    mysqlgetconfig "$mysqldir"
		# just if mysqld is really running
		if /usr/bin/mysqladmin --defaults-file="$MYSQL_CONFIG" --socket="$MYSQL_SOCKET" ping >/dev/null 2>&1; then
			/usr/bin/mysqladmin --defaults-file="$MYSQL_CONFIG" --socket="$MYSQL_SOCKET" flush-logs
		fi
	done
	;;
  status)
	for mysqldir in $DB_CLUSTERS; do
		mysqlstatus "$mysqldir"
		if [ "$MYSQL_STATUS" = "running" ]; then
			addr=${MYSQL_BIND_ADDRESS:-0.0.0.0}
			port=${MYSQL_PORT:-3306}
			socket=${MYSQL_SOCKET:-/var/lib/mysql/mysql.sock}
			pid=$MYSQL_PID
			nls "MySQL cluster %s, pid %s\n" "$mysqldir" "$pid"
			[ -z "$MYSQL_SKIP_NETWORKING" ] && nls "\ttcp:%s:%s\n" "$addr" "$port"
			nls "\tunix:%s\n" "$socket"
			pids="$pids/$MYSQL_PID/"
			progress "$MYSQL_STATUS"
		else
			show "MySQL cluster %s" "$mysqldir"
			progress "$MYSQL_STATUS" "$CFAIL"
		fi
		echo
	done

	for pid in $(/sbin/pidof mysqld); do
		if [[ $pids != */$pid/* ]]; then
			running="$running $pid"
		fi
	done

	if [ $# = 1 -a "$running" ]; then
		nls "Warning: MySQL Daemon processes not under clusters.conf control:"
		# see if we can display their status
		for pid in $running; do
			datadir=$(cat /proc/$pid/cmdline | tr '\0' '\n' | fgrep -- --datadir=)
			datadir=${datadir#--datadir=} # strip --datadir
			mysqldir=${datadir%/mysqldb/db} # strip /mysqldb/db
			mysqlstatus "$mysqldir"
			if [ "$MYSQL_STATUS" = "running" ]; then
				addr=${MYSQL_BIND_ADDRESS:-0.0.0.0}
				port=${MYSQL_PORT:-3306}
				socket=${MYSQL_SOCKET:-/var/lib/mysql/mysql.sock}
				nls "MySQL cluster %s, pid %s\n" "$mysqldir" "$pid"
				[ -z "$MYSQL_SKIP_NETWORKING" ] && nls "\ttcp:%s:%s\n" "$addr" "$port"
				nls "\tunix:%s\n" "$socket"
				progress "$MYSQL_STATUS"
			else
				show "MySQL cluster %s" "$mysqldir"
				progress "$MYSQL_STATUS" "$CFAIL"
			fi
			echo
		done
	fi
	;;
  *)
	msg_usage "$0 {start|stop|restart|try-restart|force-reload|init|flush-logs|status}"
	exit 3
esac

exit $RETVAL