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Configuring Metacat
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===================
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.. contents::
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When Metacat (Tomcat) is started, the Metacat servlet checks to see if it is
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configured. If not, Metacat will automatically send you to the configuration
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pages.
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If the installation is new, or the previous version is before 1.9.0, pay close
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attention to the configuration values. If you have upgraded Metacat, and the
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previous version is 1.9.0 or later, Metacat will pull existing configuration
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settings from a backup location. You should still verify that the values are
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correct.
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To access your Metacat, open a Web browser and type::
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http://<your_context_url>
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Where <your_context_url> is the URL of the server hosting the Metacat followed
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by the name of the WAR file (i.e., the application context) that you installed.
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For instance, the context URL for the KNB Metacat is: http://knb.ecoinformatics.org/knb
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You can always open the configuration screen from within Metacat by typing::
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http://<your_context_url>/admin
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Initial Configuration
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---------------------
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Before you can log in to the Metacat and configure it, you are required to
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confirm Metacat's back-up location and authentication configuration (if not
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already configured). Metacat will automatically attempt to locate an existing
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back-up directory, but you may need to correct the value or specify a directory
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(if the installation is new, or if Metacat was unable to determine the location
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of an existing back-up directory). The authentication configuration is required
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for logging in to the Metacat and for defining administrative accounts.
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Instructions for `Changing Authentication Configuration without Authentication`_
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are included at the end of this section.
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Back-up Configuration
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~~~~~~~~~~~~~~~~~~~~~
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To preserve its configuration settings, Metacat backs up crucial configuration details to
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a directory outside the application directories. Because a new installation/upgrade
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does not know where this external directory is, Metacat uses a discovery
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algorithm to locate it. If Metacat cannot identify a backup directory, you will
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see the Backup Directory Configuration screen.
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.. Note::
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If the metacat.properties file has many custom settings, it should be manually
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backed up before any Metacat upgrade as deploying a new Metacat war file will overwrite
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the existing file.
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.. figure:: images/screenshots/image011.png
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:align: center
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Configuring the Backup Directory.
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Authentication Configuration
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Whether you are installing or upgrading the Metacat servlet, you will
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automatically be sent to the Authentication Configuration page. You can also
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reach the Authentication Configuration page from a running Metacat by typing::
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http://<your_context_url>/admin
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Metacat uses either an internal password file or LDAP as its authentication mechanism.
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You can choose the authentication mechanism by selecting either AuthFile or AuthLdap class.
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We will only allow trusted partners to access the NCEAS LDAP server to ensure the security of our user base.
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If you are not in the trusted partner list, you may choose the internal password file authentication
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or set up your own LDAP server. You also can define your own authentication mechanism by creating a Java
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class that implements ``AuthInterface``.
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Required configuration values for the password file authentication are:
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::
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Authentication Class
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Metacat Administrators
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Users Management URL
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Password File Path.
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Required configuration values for LDAP authentication are:
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::
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Authentication Class
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Metacat Administrators
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Users Management URL
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Authentication URL
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Authentication Secure URL.
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Make sure that your user account information is entered into the Metacat
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Administrators field (e.g., uid=daigle,o=nceas,dc=ecoinformatics,dc=org). You
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will not be allowed to continue with configuration if this is missing. Multiple
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accounts can be entered, separated by the colon (:) character.
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.. Note::
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To create an account on the password file, please see the section called :doc:`authinterface`.
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To create an LDAP account on the KNB LDAP server (specified as the default LDAP server),
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go to https://identity.nceas.ucsb.edu and select the "create a new user account" link.
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If you make changes to the authentication settings, you must restart Tomcat to
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put them into effect.
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.. figure:: images/screenshots/image071.png
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:align: center
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Configuring Password File Authentication Values.
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.. figure:: images/screenshots/image009.png
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:align: center
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Configuring LDAP Authentication Values.
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Changing Authentication Configuration without Authentication
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If you need to change or add authentication information and cannot authenticate
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using the existing authentication settings (e.g., the existing Metacat
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administrator is no longer available or you forgot the administrator password),
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you must edit the Metacat configuration file by hand. This ensures that only a
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person who has access to the Metacat server and the configuration files on that
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server will be able to change the administrator accounts.
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To edit the authentication configuration file:
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1. Stop Tomcat and edit the Metacat properties (``metacat.properties``) file in the
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Metacat context directory inside the Tomcat application directory. The
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Metacat context directory is the name of the application (usually metacat):
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::
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<tomcat_app_dir>/<context_dir>/WEB-INF/metacat.properties
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2. Change the following properties appropriately:
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::
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auth.administrators - a colon separated list of administrators
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auth.url - the authentication server URL
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auth.surl - the authentication secure server URL
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auth.file.path - the authentication password file path
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3. Save the ``metacat.properties`` file and start Tomcat.
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Logging in to Metacat
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---------------------
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In order to configure Metacat, you must log in with an administrative account
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that has been configured in the Authentication Configuration settings. If you
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did not set up the correct administrative user there, you must change the
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authentication configuration by hand before you can log in.
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In the log-in screen enter your user name and password and click
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the "Login" button.
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.. figure:: images/screenshots/image015.png
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:align: center
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Logging into Metacat.
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Required Configuration
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----------------------
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All required Metacat settings can be accessed from the Metacat Configuration
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utility, which becomes available after the initial configurations
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have been specified and an authorized administrator logs in.
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.. figure:: images/screenshots/image017.png
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:align: center
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Metacat configuration menu, showing each configuration section. Once all
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sections are marked as green ``configured``, metacat can be accessed.
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The configuration settings are grouped into five sections (Metacat Global
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Properties, Authentication Configuration, Skins Specific Properties, Database
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Installation/Upgrade, Geoserver, DataONE, and Replication Configuration),
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each of which is listed with its current status (see table).
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============== =============================================================
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Status Description
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============== =============================================================
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unconfigured The section has yet to be configured
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configured The section has been configured.
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bypassed The administrator
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can choose not to configure or skip the section.
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============== =============================================================
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To the right of each configuration section is one of the following options:
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Configure Now, Reconfigure Now, Configure Global Properties First, or
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Version:X.X.X. If the option is linked (e.g., Configure Now or Reconfigure Now),
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you can select the link to open the associated configuration settings and edit them.
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If the option is not linked (e.g., Configure Global
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Properties First), the settings cannot be specified until the global properties
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are set. Once the global properties are configured, the option to configure this
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section becomes available. The Version:X.X.X option is used only for the
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Database Installation/Upgrade section. If the database schema version detected
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by Metacat matches the application version (eg, 1.9.0), then no further database
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configuration is required.
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All settings must be in a configured or bypassed state in order to run Metacat.
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For new installations or upgrades, click the "go to metacat" link that appears
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after configuration is complete to go directly to Metacat. Note that Metacat
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indexes at start-up time, so the initial start-up may take some time depending
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on the amount of data in your database and wheter or not you have opted to regenerate the spatial cache.
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If you are reconfiguring a running
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version of Metacat, you must restart the Tomcat server for the changes to
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take effect.
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.. figure:: images/screenshots/image019.png
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:align: center
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The Metacat settings as they appear after having been configured.
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Global Properties (server, ports, etc)
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The Metacat configurations included under Global Properties represent the bulk
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of the settings required to run Metacat. Click a blue question-mark
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icon beside any setting for detailed instructions. More information about each
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property is also included in the :doc:`metacat-properties`.
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.. figure:: images/screenshots/image021.png
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:align: center
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The Metacat Global Properties editing screen.
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When you save global properties, Metacat also saves a back-up file that is
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located in ``/var/metacat/.metacat`` (on Linux) or
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``C:\Program Files\metacat\.metacat`` (on Windows). When you update Metacat,
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the system automatically locates the back-up file so you do not have to re-enter
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the configuration settings.
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The first time you install Metacat, the system attempts to automatically detect
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the values for a number of settings (see table). It is important to ensure that
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these values are correct.
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================ ============================================================
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Property Description
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================ ============================================================
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Metacat Context The name of the deployed Metacat WAR file (minus the .war
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extension). E.g., "metacat"
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Server Name The DNS name of the server hosting Metacat, not including
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port numbers or the protocol ("http://").
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HTTP Port The non-secure port where Metacat will be available.
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HTTP SSL Port The secure port where Metacat will be available.
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Deploy Location The directory where the application is deployed.
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================ ============================================================
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Authentication Configuration
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Because you must specify the Authentication settings before you can access the
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main configuration page, the settings will always be configured when you view
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them in the admin interface. If you wish to change the authentication settings,
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you must restart Metacat to put the changes into effect. For more information
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about the Authentication configurations, please see Initial Configurations.
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Skins Configuration
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~~~~~~~~~~~~~~~~~~~
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Customizing the look and feel of Metacat's web interface is done via skins or
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MetacatUI themes, however as of Version 2.2.0, skins have been deprecated.
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Use MetacatUI themes instead. Themes can be deployed separately from the
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Metacat server allowing easier independent user interface customization.
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MetacatUI Themes
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................
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Themes are applied in the Skins Configuration section. If you have installed
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the optional Registry, which provides a web interface for creating, editing,
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and submitting content to Metacat, you can also choose which form fields
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appear in that interface and which are required. Note that if you do not have
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a custom theme AND you are not using the Registry, you can simply save the
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``metacatui`` default configuration.
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To use the new MetacatUI theming system, select ``metacatui`` and click the
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``Make metacatui default`` radio button. Metacat will open a list of options
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that apply to the Registry interface. For more information about creating
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custom themes, see the section called :doc:`themes`.
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.. figure:: images/screenshots/image070.png
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:align: center
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Configuring Metacat themes.
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Skins
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................
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.. deprecated:2.2.0
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Use themes instead
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If your Metacat has a customized skin, it will appear as a choice in the
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Skins Configuration settings (see below screenshot). Select the checkbox next
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to your customized skin or and click the ``Make <skin_name> default`` radio button.
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If you do not have a custom skin, select the ``default`` skin.
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Once you have selected a skin, Metacat will open a list of options that apply to the Registry
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interface. For more information about creating skins, see the Creating a Custom Skin
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section in :doc:`themes`.
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.. figure:: images/screenshots/image023.png
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:align: center
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Configuring Metacat skins.
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Select the checkbox next to your customized skin or and click the
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``Make <skin_name> default`` radio button. If you do not have a custom skin,
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select the ``default`` skin. Once you have selected a skin, Metacat will open
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a list of options that apply to the Registry interface.
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.. figure:: images/screenshots/image025.png
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:align: center
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Configuring Metacat skins.
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Select the lists and modules that you would like to appear in the Registry
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form-interface by checking the box beside each. When you save the configuration,
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the customized interface will appear to site visitors.
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Database Configuration
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~~~~~~~~~~~~~~~~~~~~~~
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Because the Database Configuration is dependent on values specified in the
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Global Properties section, the link to these settings does not become active
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until after the global settings have been saved. Once the global settings have
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been saved, Metacat automatically detects the database schema version and
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upgrades it if necessary (and with your permission).
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* New Installation
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* Upgrade
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New Installation
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................
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If Metacat determines that your database is new, the Database Install/Upgrade
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utility lists the SQL scripts that will run in order to create a database
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schema for the new version of Metacat.
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.. figure:: images/screenshots/image027.png
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:align: center
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Database installation creates tables needed for Metacat.
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If the database is not new, or if you have any questions about whether it is
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new or not, choose Cancel and contact support at knb-help@nceas.ucsb.edu.
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When you choose Continue, Metacat runs the listed scripts and creates the
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database schema.
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Upgrade
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.......
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If Metacat identifies a previous database schema, the Database Install/Upgrade
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utility notes the existing version and lists the SQL scripts that will run in
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order to update the schema for the new version of Metacat.
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If the detected schema version is incorrect, or if you have any questions about
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whether it is correct or not, click the Cancel button and contact support at
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knb-help@nceas.ucsb.edu.When you choose to continue, Metacat runs the listed
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scripts and updates the database schema.
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.. figure:: images/screenshots/image029.png
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:align: center
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Upgrading an existing database.
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Additional upgrade tasks may also run after the database upgrade is complete.
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For systems hosting large amounts of data, these upgrade routines can take time to complete.
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It is important to let the process complete before using Metacat otherwise your deployment may become unstable.
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Geoserver Configuration (Highly Recommended)
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. sidebar:: Manual Geoserver Update
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Alternatively, you can change the Geoserver username and password manually by
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directly logging in to the Geoserver. To configure the credentials manually:
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1. Go to the Geoserver admin page: http://<your_context_url>/geoserver/
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2. Log in using the default username and password ( admin / geoserver )
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3. Navigate to the Password Change Page. Enter a new user and password and click Submit.
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4. Click Apply then Save to save your new password.
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Metacat comes bundled with a Web Mapping Service called Geoserver, which
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converts spatial data into Web-deliverable map images. Geoserver installs with
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a default administrative username and password. *We highly recommend that you
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change the default credentials so that only local administrators can make
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changes to your Geoserver.* For more information about Geoserver,
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see :doc:`geoserver`.
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When you choose the Geoserver Configuration link from the main configuration
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screen, Metacat will prompt you for a few important details about your Geoserver
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installation. The data directory and context settings allow Geoserver and
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Metacat to share the same spatial data store and render maps within Metacat skins.
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The security configuration prompts for a new admin password. After you enter
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the new settings, Metacat writes the information to the Geoserver deployment.
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The default settings are typically appropriate for most Metacat deployments,
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but if you wish to skip the Geoserver configuration, click the Bypass button.
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Geoserver (if deployed) will remain with a default configuration and the main
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Metacat configuration screen will display the "bypassed" status beside the
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Geoserver settings. You will be able to run Metacat, but maps will not be
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rendered.
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.. figure:: images/screenshots/image031.png
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:align: center
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Configuring Geoserver.
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DataONE Configuration
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~~~~~~~~~~~~~~~~~~~~~
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Metacat can be configured to operate as a Member Node within the DataONE
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federation of data repositories. See :doc:`dataone` for background and details
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on DataONE and details about configuring Metacat to act as a DataONE Member Node.
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|
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Replication Configuration
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|
~~~~~~~~~~~~~~~~~~~~~~~~~
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Metacat can be configured to replicate its metadata and/or data content to another
|
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Metacat instance for backup and redundancy purposes, as well as to share data across
|
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|
sites. This feature has been used to create the Knowledge Network for Biocomplexity
|
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(KNB), as well as other networks. See :doc:`replication` for details on
|
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|
the replication system and how to configure Metacat to replicate with another node.
|
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|
|
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|
.. Note::
|
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|
|
|
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|
|
Note that much of the functionality provided by the replication subsystem in Metacat
|
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|
|
has now been generalized and standardized by DataONE, so consider utilizing the
|
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|
|
DataONE services for replication as it is a more general and standardized approach
|
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|
|
than this Metacat-specific replication system. The Metacat replication system
|
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|
|
will be supported for a while longer, but will likely be deprecated in a future
|
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|
|
release in favor of using the DataONE replication approach.
|
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|
|
|
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Additional Configuration
|
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|
|
------------------------
|
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|
|
The most dynamic Metacat properties are managed and modified with the
|
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|
|
form-based Metacat Configuration utility. These configuration properties can
|
431 |
|
|
also be accessed directly (along with additional static properties) via
|
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|
|
Metacat's property files: ``metacat.properties`` (which contains global
|
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|
|
properties, e.g., authorization and database values) and
|
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|
|
``<SKIN_NAME>.properties`` (which contains skin-specific properties). Each of
|
435 |
|
|
these property files is discussed in more depth in this section.
|
436 |
|
|
|
437 |
|
|
The ``metacat.properties`` file
|
438 |
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
439 |
|
|
Metacat's ``metacat.properties`` file contains all of Metacat's global
|
440 |
|
|
properties, both the dynamic properties, which are managed with the
|
441 |
|
|
Configuration utility, as well as the more static properties, which can only
|
442 |
|
|
be modified manually in this file. The ``metacat.properties`` file also contains
|
443 |
|
|
optional properties that are only relevant when optional Metacat features
|
444 |
|
|
(such as the harvester or replication) are enabled. The `
|
445 |
|
|
`metacat.properties file`` is found here::
|
446 |
|
|
|
447 |
|
|
<CONTEXT_DIR>/WEB_INF/metacat.properties
|
448 |
|
|
|
449 |
|
|
Where ``<CONTEXT_DIR>`` is the directory in which the Metacat application code
|
450 |
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lives (e.g., ``/var/lib/tomcat7/webapps/metacat``). The path is a combination
|
451 |
|
|
of the Web application directory (e.g., ``/var/lib/tomcat7/webapps/``) and
|
452 |
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|
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|
the Metacat context directory (e.g., ``metacat``). Both values depend upon how your
|
453 |
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system was set up during installation.
|
454 |
|
|
|
455 |
|
|
For information about each property and default or example settings, please
|
456 |
|
|
see the :doc:`metacat-properties`. Properties that can only be edited manually
|
457 |
|
|
in the metacat.properties file are highlighted in the appendix.
|
458 |
|
|
|
459 |
|
|
<SKIN_NAME>.properties
|
460 |
|
|
~~~~~~~~~~~~~~~~~~~~~~
|
461 |
|
|
The ``<SKIN_NAME>.properties`` file contains skin-specific properties
|
462 |
|
|
(e.g., template information). For each skin, the skin-specific properties are
|
463 |
|
|
found here::
|
464 |
|
|
|
465 |
|
|
<CONTEXT_DIR>/style/skins/<SKIN_NAME>/<SKIN_NAME>.properties
|
466 |
|
|
|
467 |
|
|
Where ``<CONTEXT_DIR>`` is the directory in which the Metacat application code
|
468 |
|
|
lives (described above) and ``<SKIN_NAME>`` is the name of the skin
|
469 |
|
|
(e.g., ``default`` or ``nceas``).
|
470 |
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|
471 |
|
|
Additional configuration for Tomcat 7
|
472 |
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
473 |
|
|
When running Metacat on Tomcat 7, you may get the following
|
474 |
|
|
error logging in via the Morpho application: "Fatal error sending data to Metacat: Bad Set_Cookie header:JSESSIONID=...".
|
475 |
|
|
In order to fix the issue, modify <Catalina_HOME>/conf/context.xml
|
476 |
|
|
(e.g., /var/lib/tomcat7/conf/context.xml) by adding a new attribute - "useHttpOnly" - and set it to false for the "Context" element::
|
477 |
|
|
|
478 |
|
|
<Context useHttpOnly="false">
|
479 |
|
|
|
480 |
|
|
Then restart Tomcat 7.
|