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==================================
Configuring External Storage (GUI)
==================================
The External Storage Support application enables you to mount external storage
services and devices as secondary ownCloud storage devices. You may also allow
users to mount their own external storage services.
ownCloud 9.0 introduces a new set of :ref:`occ commands for managing external storage <files_external_label>`.
Also new in 9.0 is an option for the ownCloud admin to enable or disable sharing on individual
external mountpoints (see :ref:`external_storage_mount_options_label`). Sharing on such
mountpoints is disabled by default.
Enabling External Storage Support
---------------------------------
The External storage support application is enabled on your Apps page.
.. figure:: external_storage/images/enable-app.png
:alt: Enable external storage on your Apps page.
Storage Configuration
---------------------
To create a new external storage mount, select an available backend from the
dropdown **Add storage**. Each backend has different required options, which
are configured in the configuration fields.
.. figure:: external_storage/images/add_storage.png
Each backend may also accept multiple authentication methods. These are selected
with the dropdown under **Authentication**. Different backends support different
authentication mechanisms; some specific to the backend, others are more
generic. See :doc:`external_storage/auth_mechanisms` for more detailed
information.
When you select an authentication mechanism, the configuration fields change as
appropriate for the mechanism. The SFTP backend, for one example, supports
**username and password**, **Log-in credentials, save in session**, and **RSA
public key**.
.. figure:: external_storage/images/auth_mechanism.png
:alt: An SFTP configuration example.
Required fields are marked with a red border. When all required fields are
filled, the storage is automatically saved. A green dot next to the storage row
indicates the storage is ready for use. A red or yellow icon indicates
that ownCloud could not connect to the external storage, so you need to
re-check your configuration and network availability.
User and Group Permissions
--------------------------
A storage configured in a user's Personal settings is available only to the user
that created it. A storage configured in the Admin settings is available to
all users by default, and it can be restricted to specific users and groups in
the **Available for** field.
.. figure:: external_storage/images/applicable.png
:alt: User and groups selector
.. _external_storage_mount_options_label:
Mount Options
-------------
Hover your cursor to the right of any storage configuration to expose
the settings button and trashcan. Click the trashcan to delete the
mountpoint. The settings button allows you to configure each storage mount
individually with the following options:
* Encryption
* Previews
* Enable Sharing
* Filesystem check frequency (Never, Once per direct access)
The **Encryption** checkbox is visible only when the Encryption app is enabled.
**Enable Sharing** allows the ownCloud admin to enable or disable sharing on individual mountpoints.
When sharing is disabled the shares are retained internally, so that you can re-enable sharing
and the previous shares become available again. Sharing is disabled by default.
.. figure:: external_storage/images/mount_options.png
:alt: Additional mount options exposed on mouseover.
Using Self-Signed Certificates
------------------------------
When using self-signed certificates for external storage mounts the certificate
must be imported into the personal settings of the user. Please refer to
`ownCloud HTTPS External Mount
<http://ownclouden.blogspot.de/2014/11/owncloud-https-external-mount.html>`_
for more information.
Available storage backends
--------------------------
The following backends are provided by the external storages app. Other apps
may provide their own backends, which are not listed here.
.. toctree::
:maxdepth: 1
external_storage/amazons3
external_storage/dropbox
external_storage/ftp
external_storage/google
external_storage/local
external_storage/openstack
external_storage/owncloud
external_storage/sftp
external_storage/smb
external_storage/webdav
.. note:: A non-blocking or correctly configured SELinux setup is needed
for these backends to work. Please refer to the :ref:`selinux-config-label`.
Allow Users to Mount External Storage
-------------------------------------
Check **Enable User External Storage** to allow your users to mount their own
external storage services, and check the backends you want to allow. Beware, as
this allows a user to make potentially arbitrary connections to other services
on your network!
.. figure:: external_storage/images/user_mounts.png
:alt: Checkboxes to allow users to mount external storage services.
Adding Files to External Storages
---------------------------------
We recommend configuring the background job **Webcron** or
**Cron** (see :doc:`../configuration_server/background_jobs_configuration`)
to enable ownCloud to automatically detect files added to your external
storages.
ownCloud may not always be able to find out what has been
changed remotely (files changed without going through ownCloud), especially
when it's very deep in the folder hierarchy of the external storage.
You might need to setup a cron job that runs ``sudo -u www-data php occ files:scan --all``
(or replace "--all" with the user name, see also :doc:`../configuration_server/occ_command`)
to trigger a rescan of the user's files periodically (for example every 15 minutes), which includes
the mounted external storage.
Configuration File
------------------
Storage mount configurations are stored in a JSON formatted file. Admin
storages are stored in ``data/mount.json``, while personal storages are stored
in ``data/$user/mount.json``. For more advanced use cases, including
provisioning external storages from outside ownCloud, see
:doc:`external_storage_configuration`.
|
