In this article I will tell how to forbid access to certain resources for some clients. The instructions will include descriptions of different directives.
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mkdir /u02/mysql mkdir /u02/mysql/data mkdir /u02/mysql/log mkdir /u02/mysql/run mkdir /u02/mysql/lock chown -R mysql:mysql /u02/mysql mysql_install_db --datadir=/u02/mysql/data --user=mysql
/etc/my.server2.cnf
[mysqld] port=3307 datadir=/u02/mysql/data socket=/u02/mysql/mysql.sock user=mysql # Default to using old password format for compatibility with mysql 3.x # clients (those using the mysqlclient10 compatibility package). old_passwords=1 log-bin = /u02/mysql/log/mysql-bin.log [mysqld_safe] log-error=/u02/mysql/log/mysqld.log pid-file=/u02/run/mysqld.pid [isamchk] [myisamchk]
/etc/rc.d/init.d/mysqld.server2
#!/bin/bash # # mysqld.server2 This shell script takes care of starting and stopping # the MySQL subsystem (mysqld). # # chkconfig: - 64 36 # description: MySQL database server 2nd instance. # processname: mysqld # config: /etc/my.server2.cnf # pidfile: /u02/mysql/run/mysqld.pid # Source function library. . /etc/rc.d/init.d/functions # Source networking configuration. . /etc/sysconfig/network prog="MySQL" # extract value of a MySQL option from config files # Usage: get_mysql_option SECTION VARNAME DEFAULT # result is returned in $result # We use my_print_defaults which prints all options from multiple files, # with the more specific ones later; hence take the last match. get_mysql_option(){ result=`/usr/bin/my_print_defaults "$1" | sed -n "s/^--$2=//p" | tail -n 1` if [ -z "$result" ]; then # not found, use default result="$3" fi } get_mysql_option mysqld datadir "/u02/mysql/data" datadir="/u02/mysql/data" get_mysql_option mysqld socket "$datadir/mysql.sock" socketfile="$datadir/mysql.sock" get_mysql_option mysqld_safe log-error "/u02/mysql/log/mysqld.log" errlogfile="/u02/mysql/log/mysqld.log" get_mysql_option mysqld_safe pid-file "/u02/mysql/run/mysqld.pid" mypidfile="/u02/mysql/run/mysqld.pid" start(){ touch "$errlogfile" chown mysql:mysql "$errlogfile" chmod 0640 "$errlogfile" [ -x /sbin/restorecon ] && /sbin/restorecon "$errlogfile" if [ ! -d "$datadir/mysql" ] ; then action $"Initializing MySQL database: " /usr/bin/mysql_install_db ret=$? chown -R mysql:mysql "$datadir" if [ $ret -ne 0 ] ; then return $ret fi fi chown mysql:mysql "$datadir" chmod 0755 "$datadir" # Pass all the options determined above, to ensure consistent behavior. # In many cases mysqld_safe would arrive at the same conclusions anyway # but we need to be sure. /usr/bin/mysqld_safe --defaults-file=/etc/my.server2.cnf --datadir="$datadir" --socket="$socketfile" \ --log-error="$errlogfile" --pid-file="$mypidfile" \ >/dev/null 2>&1 & ret=$? # Spin for a maximum of N seconds waiting for the server to come up. # Rather than assuming we know a valid username, accept an "access # denied" response as meaning the server is functioning. if [ $ret -eq 0 ]; then STARTTIMEOUT=30 while [ $STARTTIMEOUT -gt 0 ]; do RESPONSE=`/usr/bin/mysqladmin -uUNKNOWN_MYSQL_USER ping 2>&1` && break echo "$RESPONSE" | grep -q "Access denied for user" && break sleep 1 let STARTTIMEOUT=${STARTTIMEOUT}-1 done if [ $STARTTIMEOUT -eq 0 ]; then echo "Timeout error occurred trying to start MySQL Daemon." action $"Starting $prog: " /bin/false ret=1 else action $"Starting $prog: " /bin/true fi else action $"Starting $prog: " /bin/false fi [ $ret -eq 0 ] && touch /u02/mysql/lock/mysqld return $ret } stop(){ MYSQLPID=`cat "$mypidfile" 2>/dev/null ` if [ -n "$MYSQLPID" ]; then /bin/kill "$MYSQLPID" >/dev/null 2>&1 ret=$? if [ $ret -eq 0 ]; then STOPTIMEOUT=60 while [ $STOPTIMEOUT -gt 0 ]; do /bin/kill -0 "$MYSQLPID" >/dev/null 2>&1 || break sleep 1 let STOPTIMEOUT=${STOPTIMEOUT}-1 done if [ $STOPTIMEOUT -eq 0 ]; then echo "Timeout error occurred trying to stop MySQL Daemon." ret=1 action $"Stopping $prog: " /bin/false else rm -f /u02/mysql/lock/mysqld rm -f "$socketfile" action $"Stopping $prog: " /bin/true fi else action $"Stopping $prog: " /bin/false fi else ret=1 action $"Stopping $prog: " /bin/false fi return $ret } restart(){ stop start } condrestart(){ [ -e /u02/mysql/lock/mysqld ] && restart || : } # See how we were called. case "$1" in start) start ;; stop) stop ;; status) status mysqld ;; restart) restart ;; condrestart) condrestart ;; *) echo $"Usage: $0 {start|stop|status|condrestart|restart}" exit 1 esac exit $?
chkconfig mysqld.server2 on service mysqld.server2 start
mysqladmin -P 3307 --protocol=tcp -u root password 'NEWPASSWORD'
mysql -P 3307 --protocol=tcp -u root -p [root@lxpsrv01 ~]# mysql -P 3307 --protocol=tcp -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 11 Server version: 5.0.45-log Source distribution Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | test | +--------------------+ 3 rows in set (0.00 sec) mysql>
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