session_redis_public/attachment_s3

Attachments on S3 storage
=========================

This addon allows to store the attachments (documents and assets) on S3 or any
other S3-compatible Object Storage.

Configuration
-------------

Activate S3 storage:

* Create or set the system parameter with the key ``ir_attachment.location``
  and the value in the form ``s3``.

Configure accesses with environment variables:

* ``AWS_HOST`` (not required if using AWS services)
* ``AWS_ACCESS_KEY_ID``
* ``AWS_SECRET_ACCESS_KEY``
* ``AWS_BUCKETNAME``

Read-only mode:

The bucket and the file key are stored in the attachment. So if you change the
``AWS_BUCKETNAME`` or the ``ir_attachment.location``, the existing attachments
will still be read on their former bucket. But as soon as they are written over
or new attachments are created, they will be created on the new bucket or on
the other location (db or filesystem). This is a convenient way to be able to
read the production attachments on a replication (since you have the
credentials) without any risk to alter the production data.

Limitations
-----------

When the ``ir.attachment`` model is started, it will automatically migrate
the attachments which are not stored in S3 yet. This might be an issue when
the number of attachments is huge. In that case, you might have more control
by calling yourself ``env['ir.attachment'].force_storage()``.