14. Installing more MMBase servers
on a single Tomcat server
If you want to support
more instances of MMBase,
for example if you would like
to make MMBase
available to more or all of your users,
you can create several
MMBase installations
and have these all run on the same
Tomcat server.
Install MMBase
in the home directory
of the user <user>
performing all steps before:
create a directory mmbase/
in the users home directory,
copy all MMBase files
into the directory
/home/<user>/mmbase/,
build the directory structure and configuration files
in the very same way we did before,
for MMBase version 1.7
running on Tomcat version 5,
enable the Xerces libraries,
for MMBase version 1.6
running on Tomcat version 4,
remove the Xerces libraries
in MMBase
(after you have copied these
from MMBase
to Tomcat
the first time),
install the MySQL
JDBC driver
and create a new MySQL database
for this user.
Make sure both the user
and the Tomcat server
have access to the
MMBase installation:
chown -R <user>:tomcat /home/<user>/mmbase/
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Make sure that the directory
/home/<user>/mmbase/WEB-INF/config/builders/applications
is writable and accessible by the servlet engine user
(for auto-installing builders):
chmod 770 /home/<user>/mmbase/WEB-INF/config/builders/applications
chmod 750 /home/<user>/mmbase/WEB-INF/config/builders/
chmod 750 /home/<user>/mmbase/WEB-INF/config/
chmod 750 /home/<user>/mmbase/WEB-INF/
chmod 750 /home/<user>/mmbase/
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Now the home directory of this user has to be accessible
to the Tomcat server
as well.
You can change the group owner of the users home directory
to the tomcat user group:
chown -g tomcat /home/<user>/
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Or, if you don't want this,
use the Access Control Lists (ACL's)
to accomplish the same:
setfacl -m u:tomcat:r-x /home/<user>/
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Finally, link the new
MMBase installation
to the Tomcat server:
ln -s /home/<user>/mmbase /usr/local/tomcat/webapps/mmbase-<user>
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and restart Tomcat:
which will make
this users MMBase installation
available through:
http://<hostname>:8080/mmbase-<user>/
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Again, you can set up a JK 2 mapping or a reverse proxy
in Apache
like we did before.
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In order to run
several instances of MMBase
on a single Tomcat server,
make sure you increase the available memory resources, i.e.
by adding to the $CATALINA_OPTS environment variable
in /etc/rc.d/init.d/tomcat:
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