Database Server Installation Shared » History » Revision 28
Revision 27 (Neil Voss, 05/12/2010 08:55 AM) → Revision 28/82 (Neil Voss, 05/12/2010 08:58 AM)
h1. Database Server Installation
h2. Install MySQL
The following is for the computer that hosts the databases. This involves installing MySQL server and creation/configuration of the leginondb and projectdb databases.
*Note:* You may already have MySQL Server and Client installed. Check by typing mysql at the command line.
If you see a MySQL prompt (mysql>), skip to step 2
h3. Install MySQL-Server and MySQL-Client
To install Mysql on Linux you have two options (the first option is better):
# Use your package installer (yum, zypper, YaST, apt-get). For example:
<pre>sudo yum install mysql mysql-server</pre>
# Download the latest MySQL-server package for Linux from http://www.mysql.com
h3. Example MySQL configuration files are usually located in /usr/share/mysql.
<pre>
ls /usr/share/mysql/my*
/usr/share/mysql/my-huge.cnf
/usr/share/mysql/my-innodb-heavy-4G.cnf
/usr/share/mysql/my-large.cnf
/usr/share/mysql/my-medium.cnf
/usr/share/mysql/my-small.cnf
</pre>
If that does not work try the locate function
<pre>
locate my | egrep "\.cnf$"
/etc/my.cnf
/usr/share/mysql/my-huge.cnf
/usr/share/mysql/my-innodb-heavy-4G.cnf
/usr/share/mysql/my-large.cnf
/usr/share/mysql/my-medium.cnf
/usr/share/mysql/my-small.cnf
</pre>
h3. Configure my.cnf in /etc using my-huge.cnf as the template
# Copy my-huge.cnf to my.cnf
<pre>sudo cp -v /usr/share/mysql/my-huge.cnf /etc/my.cnf</pre>
# Edit /etc/my.cnf to add or change query cache variables like these (be sure to place them under the @[mysqld]@ section):
<pre>
query_cache_type= 1
query_cache_size = 100M
query_cache_limit= 100M
</pre>
# Search for the text default-storage-engine in /etc/my.cnf. If it exists and is set to other than MyISAM, you should change it to:
<pre>default-storage-engine=MyISAM</pre>
h3. Start the MySQL Server
For CentOS/Fedora/RHEL system use the service command:
<pre>
sudo /sbin/service mysqld start
</pre>
For other Unix systems:
<pre>
sudo /etc/init.d/mysqld start
</pre>
or on some installations,
<pre>
sudo /etc/init.d/mysql start
</pre>
For future reference: start | stop | restart MySQL Server with similar commands:
<pre>
sudo /etc/init.d/mysqld start
sudo /etc/init.d/mysqld stop
sudo /etc/init.d/mysqld restart
sudo /sbin/service mysqld start
sudo /sbin/service mysqld stop
sudo /sbin/service mysqld restart
</pre>
If you want to start MySQL automatically at boot
<pre>
sudo /sbin/chkconfig mysql on
</pre>
or for SuSe:
<pre>
sudo /sbin/chkconfig mysql on
</pre>
h3. 6. For future reference, the database location will be:
<pre>
ls /var/lib/mysql
ibdata1 ib_logfile0 ib_logfile1 mysql mysql.sock test
</pre>
h3. 7. Create the Leginon database, call it leginondb
<pre>
sudo mysqladmin create leginondb
</pre>
h3. 8. Create the Project database, call it projectdb
<pre>
sudo mysqladmin create projectdb
</pre>
h3. 9. Connect to mysql db
If starting from scratch the mysql root user will have no password. This is assumed to be To set the case and we will set it later. root password use the command: @sudo mysqladmin -u root password NEWPASSWORD@
<pre>
mysql -u root -p mysql
</pre>
<pre>
mysql> select user, password, host from user;
+------+----------+-----------+
| user | password | host |
+------+----------+-----------+
| root | | localhost |
| root | | host1 |
| | | host1 |
| | | localhost |
+------+----------+-----------+
4 rows in set (0.00 sec)
</pre>
h3. 10. Create user
Create and grant privileges to a user called usr_object for the databases on both the localhost and other hosts involved. For example, use wild card '%' for all hosts. You can set specific (@create, select, insert, update, alter, drop, delete, show, describe, rename@) privileges or @ALL@ privileges to the user. See MySQL Reference Manual for details.
<pre>
mysql> CREATE USER usr_object@'localhost' IDENTIFIED BY 'PASSWORD';
mysql> GRANT ALTER, CREATE, INSERT, SELECT, UPDATE ON leginondb.* TO usr_object@'localhost';
mysql> GRANT ALTER, CREATE, INSERT, SELECT, UPDATE ON projectdb.* TO usr_object@'localhost';
</pre>
less secure version (no password and all privileges), we recommend not allowing the DROP and DELETE privileges.
<pre>
mysql> CREATE USER usr_object@'localhost';
mysql> GRANT ALL PRIVILEGES ON leginondb.* TO usr_object@'localhost';
mysql> GRANT ALL PRIVILEGES ON projectdb.* TO usr_object@'localhost';
</pre>
Similarly, you can assign a domain
<pre>
mysql> CREATE USER usr_object@'%' IDENTIFIED BY 'PASSWORD';
mysql> GRANT ALTER, CREATE, INSERT, SELECT, UPDATE ON leginondb.* to usr_object@<host.mydomain.edu>;
mysql> GRANT ALTER, CREATE, INSERT, SELECT, UPDATE ON projectdb.* to usr_object@<host.mydomain.edu>;
</pre>
Next, give create and access privileges for the processing databases which begin with "ap".
<pre>
# if your web host is local
mysql> GRANT ALTER, CREATE, INSERT, SELECT, UPDATE ON `ap%`.* to usr_object@localhost;
# for all other hosts if you are accessing the databases from another computer
mysql> GRANT ALTER, CREATE, INSERT, SELECT, UPDATE ON `ap%`.* to usr_object@<host.mydomain.edu>;
</pre>
h3. 11. Change Root password
To set the root password use the command:
<pre>
sudo mysqladmin -u root password NEWPASSWORD
</pre>
Or you can do it from within mysql
<pre>
mysql> update user set password=password('your_own_root_password') where user="root";
Query OK, 2 rows affected (0.01 sec)
Rows matched: 2 Changed: 2 Warnings: 0
mysql> flush privileges;
mysql>^D or exit;
</pre>
From now on, you will need to specify the password to connect to the database as root user like this:
<pre>
>mysql -u root -p mysql
</pre>
h3. 12. Check MySQL variables
<pre>
>mysql -u usr_object leginondb
mysql> SHOW VARIABLES LIKE 'query%';
+------------------------------+-----------+
| Variable_name | Value |
+------------------------------+-----------+
| ft_query_expansion_limit | 20 |
| have_query_cache | YES |
| long_query_time | 10 |
| query_alloc_block_size | 8192 |
| query_cache_limit | 104857600 | <<---This should correspond to your change
| query_cache_min_res_unit | 4096 |
| query_cache_size | 104857600 | <<---This should correspond to your change
| query_cache_type | ON | <<---This should correspond to your change
| query_cache_wlock_invalidate | OFF |
| query_prealloc_size | 8192 |
+------------------------------+-----------+
10 rows in set (0.00 sec)
mysql> exit;
</pre>
h3. 13. Make sure MySQL is running
<pre>
prompt:~> mysqlshow
+--------------+
| Databases |
+--------------+
| mysql |
| leginondb |
| projectdb |
+--------------+
</pre>
h3. 14. Or check with the following php script (if already installed)
<pre>
<?
mysql_connect('your_host.your_institute.edu', 'usr_object', '','leginondb');
echo mysql_stat();
?>
</pre>
Output:
<pre>
Uptime: 1452562 Threads: 1 Questions: 618 Slow queries: 0 Opens: 117 Flush tables: 1 Open tables: 106 Queries per second avg: 0.000
</pre>
h2. Configure phpMyAdmin
Edit the phpMyAdmin config file:
<pre>
$ sudo vi /etc/phpMyAdmin/config.inc.php
</pre>
and change the following lines:
<pre>
$cfg['Servers'][$i]['AllowRoot'] = FALSE;
</pre>
Edit the phpMyAdmin apache config file:
<pre>
$ sudo $EDITOR /etc/httpd/conf.d/phpMyAdmin.conf
</pre>
and change the following lines:
*Note:* If you want to access phpMyAdmin from another computer, you can add it to its web access configuration file found as /etc/httpd/conf.d/phpMyAdmin.conf in a typical installation
<pre>
<Directory /usr/share/phpMyAdmin/>
order deny,allow
deny from all
allow from 127.0.0.1
allow from YOUR_IP_ADDRESS
</Directory>
</pre>
To test the PHPMyAdmin configuration, point your browser to http://YOUR_IP_ADDRESS/phpmyadmin.