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ez publish / technical manual / 4.7 / features / clustering / uninstalling an ezdb cluster


Caution: This documentation is for eZ Publish legacy, from version 3.x to 5.x.

  • Uninstalling an eZDB cluster

    Since users may decide not to use cluster anymore, or even choose to use another file handler, this chapter would show how to uninstall an existing eZDB cluster.

    The following procedures may cause loss of information, since this is a cluster removal guide. Before proceeding, please be sure to make a complete backup of your site, cluster folder and database, to avoid losing data.

    Removing an eZDB cluster

    1. Clear the cache

    Before starting it's better to clear the eZ Publish's cache, by running the following command from your eZ Publish root folder:

    php bin/php/ezcache.php --clear-all
    

    2. Unclusterize your eZDB cluster

    Run the following shell command from your eZ Publish root folder:

    php bin/php/clusterize.php -u
    

    This will move cluster cache and binaries from the cluster path to the original locations.

    3. Remove the images serving script

    Remove the config.cluster.php file, which has been created while setting up the cluster environment. For that, you can use the following command from your eZ Publish root folder:

    rm config.cluster.php
    

    4. Remove the cluster database table

    On MySQL the database table can be removed by executing the following shell command:

    mysqladmin -u <user> -p<password> drop ezdbfile
    mysqladmin -u <user> -p<password> drop ezdbfile_data
    

    Note: On Oracle the same ezdbfile  and ezdbfile_data tables need to be removed.

    5. Remove the Clustering Setting from your file.ini.append.php:

    Simply edit your file.ini.append.php file and remove the ClusteringSettings block completelly. You can see an example below:

    [ClusteringSettings]
    FileHandler=eZDBFileHandler
    DBBackend=eZDBFileHandlerMysqliBackend
    DBHost=localhost
    DBPort=3306
    DBName=name
     
    DBUser=user
    DBPassword=pass
    

    6. Disable kernel clustering debug

    Disable the kernel-clustering setting from debug.ini, by setting its value to disabled, as in the following example:

    [GeneralCondition]
     
    kernel-clustering=disabled
    

    7. Remove the cluster rewrite rules from the Apache configuration

    Edit your apache configurations file and remove the following rules:

    RewriteRule ^/var/([^/]+/)?storage/images-versioned/.* /index_cluster.php [L]
    RewriteRule ^/var/([^/]+/)?storage/images/.* /index_cluster.php [L]
    RewriteRule ^/var/([^/]+/)?cache/public/(stylesheets|javascript) /index_cluster.php &nbsp;[L]
    

    8. Restart Apache and test the site

    Restart the Apache web server. After it has been restarted, the system should be up and running in cluster mode. Verify that the site works correctly, content images are displayed and content binary files are accessible (open the site pages in a web browser, log in to the administration interface, try clicking around and so on).

    9. Clear the cache files

    Clear the cache files again, to make sure your sites generate clean caches. To do so, use the following command:

    php bin/php/ezcache.php --clear-all
    

    Ricardo Correia (01/10/2013 2:49 pm)

    Ricardo Correia (02/10/2013 8:02 am)


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