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16.3.2. Multi-Computer Installation

Each MySQL Cluster host computer running storage or SQL nodes must have installed on it a MySQL server binary. For management nodes, it is not necessary to install the MySQL server binary, but you do have to install the MGM server daemon and client binaries (ndb_mgmd and ndb_mgm, respectively). This section covers the steps necessary to install the correct binaries for each type of Cluster node.

MySQL AB provides precompiled binaries that support Cluster, and there is generally no need to compile these yourself. Therefore, the first step in the installation process for each cluster host is to download the file mysql-5.1.7-beta-pc-linux-gnu-i686.tar.gz from the MySQL downloads area. We assume that you have placed it in each machine's /var/tmp directory. (If you do require a custom binary, see Section 2.8.3, “Installing from the Development Source Tree”.)

RPMs are also available for both 32-bit and 64-bit Linux platforms. (See Section 2.4, “Installing MySQL on Linux”, for more information about installing MySQL using the RPMs.) After installing from RPM, you will still need to configure the cluster as discussed in Section 16.3.3, “Multi-Computer Configuration”.

Note: After completing the installation, do not yet start any of the binaries. We will show you how to do so following the configuration of all nodes.

Storage and SQL Node Installation

On each of the three machines designated to host storage or SQL nodes, perform the following steps as the system root user:

  1. Check your /etc/passwd and /etc/group files (or use whatever tools are provided by your operating system for manging users and groups) to see whether there is already a mysql group and mysql user on the system. Some OS distributions create these as part of the operating system installation process. If they are not already present, create a new mysql user group, and then add a mysql user to this group:

    shell> groupadd mysql
    shell> useradd -g mysql mysql

    The syntax for useradd and groupadd may differ slightly on different versions of Unix, or they may have different names such as adduser and addgroup.

  2. Change location to the directory containing the downloaded file, unpack the archive, and create a symlink to the mysql directory. Note that the actual file and directory names will vary according to the MySQL version number.

    shell> cd /var/tmp
    shell> tar -xzvf -C /usr/local mysql-5.1.7-beta-pc-linux-gnu-i686.tar.gz
    shell> ln -s /usr/local/mysql-5.1.7-beta-pc-linux-gnu-i686 /usr/local/mysql
  3. Change location to the mysql directory and run the supplied script for creating the system databases:

    shell> cd mysql
    shell> scripts/mysql_install_db --user=mysql
  4. Set the necessary permissions for the MySQL server and data directories:

    shell> chown -R root .
    shell> chown -R mysql data
    shell> chgrp -R mysql .

    Note that the data directory on each machine hosting a data node is /usr/local/mysql/data. We will use this piece of information when we configure the management node. (See Section 16.3.3, “Multi-Computer Configuration”.)

  5. Copy the MySQL startup script to the appropriate directory, make it executable, and set it to start when the operating system is booted up:

    shell> cp support-files/mysql.server /etc/rc.d/init.d/
    shell> chmod +x /etc/rc.d/init.d/mysql.server
    shell> chkconfig --add mysql.server

    (The startup scripts directory may vary depending on your operating system and version — for example, in some Linux distributions, it is /etc/init.d.)

    Here we use Red Hat's chkconfig for creating links to the startup scripts; use whatever means is appropriate for this purpose on your operating system and distribution, such as update-rc.d on Debian.

Remember that the preceding steps must be performed separately for each machine on which a storage or SQL node is to reside.

Management Node Installation

Installation for the management (MGM) node does not require installation of the mysqld binary. Only the binaries for the MGM server and client are required, which can be found in the downloaded archive. Again, we assume that you have placed this file in /var/tmp.

As system root (that is, after using sudo, su root, or your system's equivalent for temporarily assuming the system administrator account's privileges), perform the following steps to install ndb_mgmd and ndb_mgm on the Cluster management node host:

  1. Change location to the /var/tmp directory, and extract the ndb_mgm and ndb_mgmd from the archive into a suitable directory such as /usr/local:

    shell> cd /var/tmp
    shell> tar -zxvf mysql-5.1.7-beta-pc-linux-gnu-i686.tar.gz \
              /usr/local '*/bin/ndb_mgm*'
  2. Change location to the directory into which you unpacked the files, and then make both of them executable:

    shell> cd /usr/local
    shell> chmod +x ndb_mgm*

In Section 16.3.3, “Multi-Computer Configuration”, we will create and write configuration files for all of the nodes in our example Cluster.

  Published under the terms of the GNU General Public License Design by Interspire