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Last modified: 27 Dec 2007
Step-By-Step Installation
Below is the procedure of installing
MySQL database software
and adding MySQL server to H-Sphere cluster.
Step 1. Check for MySQL on your box
First, check whether MySQL database server is installed.
You can do this by entering the following command into your command
prompt:
which mysql
If it returns you a path, for example "/usr/bin/mysql",
you have MySQL database software installed. Alternatively, you can
try to find an installation of MySQL by running the following command
in your command prompt:
rpm -qa | grep -i mysql
If this gives you something like:
mysql-4.0.16-0
mysql-client-4.0.16-0
you already have MySQL DBMS installed. See the
list of H-Sphere packages
for the version of MySQL packages currently installed with H-Sphere.
Step 2. Download MySQL
If you don't have MySQL installed, download MySQL
binary RPM distribution. On the Web site
www.mysql.com,
go to the Download section, select the latest stable release,
than select "The server for i386 systems" from
the "Standard binary RPMs" list. Also, you will
need client programs, so go back to the Download section
and download "client programs for i386 systems"
from the "Standard binary RPMs" list.
Step 3. Install MySQL
Now that you have downloaded MySQL database software
installation package, execute the following command:
rpm -ivh /path/to/downloaded/mysql-4.xx.xx-x.rpm
where mysql-4.xx.xx-x.rpm is MySQL binary RPM
distribution filename.
Step 4. Configure MySQL
To get MySQL working, you now need to configure the
software installed.
Connection from H-Sphere to MySQL database is performed
via SSH. In order to connect to MySQL database with a user name
and password, put the .my.cnf file in the home directory
of the user under which SSH connection is established. Typically,
it is the mysql user. To find out the path to the MySQL home directory, log in
as the mysql user under root, and then type pwd:
# su - mysql
# pwd
Or, finger the mysql user for details:
# finger mysql
In .my.cnf, you must insert the following lines:
[client]
user=login_of_some_highly_privileged_user
password=his_password
where login_of_some_highly_privileged_user
is the login name of MySQL database user which have insert, update,
delete, select, privileges on MySQL system database (those called
mysql). his_password is the plain text password of this
user.
WARNING: For security reasons, you MUST set
access type for .my.cnf file to 0400 or 0600.
Step 5. Adding MySQL Server To H-Sphere
After you have installed and configured MySQL software on a new box,
add MySQL server to H-Sphere cluster.
If MySQL is installed on a live H-Sphere box,
add MySQL as a new H-Sphere service.
MySQL Log File
/var/log/mysqld is the MySQL server log file.
Backing Up MySQL Database
To back up MySQL database, back up the MySQL home directory,
or use the mysqldump utility to dump the
database. Type 'man mysql', 'man mysqldump' or see MySQL documentation
for details.
H-Sphere MySQL Scripts
On MySQL database box in /hsphere/shared/scripts
the following scripts must be installed:
mysql-change-user-password - changes user password
mysql-change-user-password.sh - changes user password
mysql-db-size - calculates database size
mysql-db-size.pl - calculates database size
mysql-drop-database - drops database
mysql-drop-database.sh - drops database
mysql-resume-user - resumes suspended user
mysql-resume-user.sh - resumes suspended user
mysql-create-db - creates database
mysql-create-db.sh - creates database
mysql-db-users - lists MySQL database users who have any
privilege on this database
mysql-db-users.sh - lists MySQL database users who have any
privilege on this database
mysql-get-login.pl - gets superuser login and password
mysql-get-login.pl.sh - gets superuser login and password
mysql-revoke-all - revokes all user privileges on database
mysql-revoke-all.sh - revokes all user privileges on database
mysql-create-user - creates MySQL user
mysql-create-user.sh - creates MySQL user
mysql-delete-user - deletes MySQL user
mysql-delete-user.sh - deletes MySQL user
mysql-grant-priv - grants given privilege on given database
to given user
mysql-grant-priv.sh - grants given privilege on given database
to given user
mysql-suspend-user - suspends MySQL user
mysql-suspend-user.sh - suspends MySQL user
All scripts accept some command line parameters. All
scripts consist of two parts. The first part typically without extension
sets some necessary variables and then calls the second part of
the script under sudo.
INFO: fix_perm.sh scripts sets needed
owner and rights to mysql scripts.
WARNING: Some of this scripts are different on FreeBSD systems,
so copy corresponding versions of scripts from /hsphere/shared/scripts/FreeBSD.
Remote Access to MySQL Logical Server
(H-Sphere 2.4.3 Patch 7 and up)
By default, MySQL client connects to MySQL server on localhost (127.0.0.1).
Starting with H-Sphere 2.4.3 Patch 7,
it becomes possible to configure MySQL client to use the -h option
to connect to MySQL server remotely by logical server IP:
mysql -h <mysql_logical_server_ip>
This feature is, in particular, required in some custom MySQL configurations where one MySQL client
(bound to physical server IP) connects to several MySQL servers on different boxes (bound to logical server IPs).
It is possible to enable or disable remote access to particular MySQL logical servers in Control Panel:
- go to the admin Control Panel, E.Manager menu, L.Server,
- choose a MySQL logical server from the list of logical servers,
- under Additional Options, check or uncheck the option Remote Access To MySQL Server and press Set:
Confirm your choice on the page that appears.
WARNING:
1) Remote access to MySQL server is currently incompatible with H-Sphere mail system!
You must not enable remote MySQL access on physical servers with live mail!
2) You must not change logical server IP on or add another server IP to MySQL logical server
where remote access is enabled to!
phpMyAdmin
Please refer to the separate PhpMyAdmin document.
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