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Installing MariaDB MaxScale using a tarball
MariaDB MaxScale is also made available as a tarball, which is named like maxscale-x.y.z.OS.tar.gz where x.y.z is the same as the corresponding version and OS identifies the operating system, e.g. maxscale-2.0.1.centos.7.tar.gz.
The tarball has been built with the assumption that it will be installed in /usr/local. However, it is possible to install it in any directory, but in that case MariaDB MaxScale must be invoked with a flag.
Installing as root in /usr/local
If you have root access to the system you probably want to install MariaDB MaxScale under the user and group maxscale.
The required steps are as follows:
$ sudo groupadd maxscale
$ sudo useradd -g maxscale maxscale
$ cd /usr/local
$ sudo tar -xzvf maxscale-x.y.z.OS.tar.gz
$ sudo ln -s maxscale-x.y.z.OS maxscale
$ cd maxscale
$ sudo chown -R maxscale var
Creating the symbolic link is necessary, since MariaDB MaxScale has been built with with the assumption that its base-directory, that is, the directory under which all its sub-directories are found, is /usr/local/maxscale.
The symbolic link also makes it easy to switch between different versions of MariaDB MaxScale that have been installed side by side in /usr/local; just make the symbolic link point to another installation.
In addition, the first time you install MariaDB MaxScale from a tarball you need to create the following directories:
$ sudo mkdir /var/log/maxscale
$ sudo mkdir /var/lib/maxscale
$ sudo mkdir /var/run/maxscale
$ sudo mkdir /var/cache/maxscale
and make maxscale the owner of them:
$ sudo chown maxscale /var/log/maxscale
$ sudo chown maxscale /var/lib/maxscale
$ sudo chown maxscale /var/run/maxscale
$ sudo chown maxscale /var/cache/maxscale
The following step is to create the MariaDB MaxScale configuration file /etc/maxscale.cnf. The file etc/maxscale.cnf.template can be used as a base. Please refer to Configuration Guide for details.
When the configuration file has been created, MariaDB MaxScale can be started.
$ sudo bin/maxscale --user=maxscale -d
The -d flag causes maxscale not to turn itself into a daemon, which is adviseable the first time MariaDB MaxScale is started, as it makes it easier to spot problems.
If you want to place the configuration file somewhere else but in /etc you can invoke MariaDB MaxScale with the --config flag, for instance, --config=/usr/local/maxscale/etc/maxscale.cnf.
Installing in any Directory
Enter a directory where you have the right to create a subdirectory. Then do as follows.
$ tar -xzvf maxscale-x.y.z.OS.tar.gz
The next step is to create the MaxScale configuration file maxscale-x.y.z/etc/maxscale.cnf. The file maxscale-x.y.z/etc/maxscale.cnf.template can be used as a base. Please refer to Configuration Guide for details.
When the configuration file has been created, MariaDB MaxScale can be started.
$ cd maxscale-x.y.z.OS
$ bin/maxscale -d --basedir=.
With the flag --basedir, MariaDB MaxScale is told where the lib, etc and var directories are found. Unless it is specified, MariaDB MaxScale assumes the lib directory is found in /usr/local/maxscale, and the var and etc directories in /.
It is also possible to specify the directories and the location of the configuration file individually. Invoke MaxScale like
$ bin/maxscale --help
to find out the appropriate flags.