MySQL の log 出力と logrotate 設定

# mysql -V
mysql  Ver 14.14 Distrib 5.1.69, for redhat-linux-gnu (x86_64) using readline 5.1

mkdir /var/log/mysql/
touch /var/log/mysql/error.log
touch /var/log/mysql/query.log
touch /var/log/mysql/slow.log
chmod 755 /var/log/mysql/
chmod 666 /var/log/mysql/*
chown -R mysql. /var/log/mysql/

my.cnf設定

vi /etc/my.cnf
 
[mysqld]
#query log
log=/var/log/mysql/query.log
 
#slow query log
slow_query_log=ON
slow_query_log_file=/var/log/mysql/slow.log
long_query_time=0.5
 
[mysqld_safe]
log-error=/var/log/mysql/error.log
 
[mysqladmin]
password = <*mysql password*>
user= root

ログ出力オプション

vi /etc/rc.d/init.d/mysqld
 
$exec   --datadir="$datadir" --socket="$socketfile" \
↓
$exec   --log --datadir="$datadir" --socket="$socketfile" \

ローテートファイルの作成

vi /etc/logrotate.d/mysql-log-rotate

/var/log/mysql/error.log {
        # create 600 mysql mysql
        notifempty
    daily
        rotate 3
        missingok
        compress
    postrotate
    # just if mysqld is really running
    if test -x /usr/bin/mysqladmin && \
       /usr/bin/mysqladmin ping &>/dev/null
    then
       /usr/bin/mysqladmin flush-logs
    fi
    endscript
}
 
/var/log/mysql/query.log {
        # create 600 mysql mysql
        notifempty
    daily
        rotate 3
        missingok
        compress
    postrotate
    # just if mysqld is really running
    if test -x /usr/bin/mysqladmin && \
       /usr/bin/mysqladmin ping &>/dev/null
    then
       /usr/bin/mysqladmin flush-logs
    fi
    endscript
}
 
/var/log/mysql/slow.log {
        # create 600 mysql mysql
        notifempty
    daily
        rotate 3
        missingok
        compress
    postrotate
    # just if mysqld is really running
    if test -x /usr/bin/mysqladmin && \
       /usr/bin/mysqladmin ping &>/dev/null
    then
       /usr/bin/mysqladmin flush-logs
    fi
    endscript
}

参考：

http://ijo.cc/it/ja/server/mysql-log-rotate/