Configure Object Storage with the S3 API¶

The Swift3 middleware emulates the S3 REST API on top of Object Storage.

The following operations are currently supported:

• GET Service
• DELETE Bucket
• GET Bucket (List Objects)
• PUT Bucket
• DELETE Object
• GET Object
• HEAD Object
• PUT Object
• PUT Object (Copy)

To use this middleware, first download the latest version from its repository to your proxy servers.

$ git clone https://git.openstack.org/openstack/swift3

Then, install it using standard python mechanisms, such as:

# python setup.py install

Alternatively, if you have configured the Ubuntu Cloud Archive, you may use:

# apt-get install swift-plugin-s3

To add this middleware to your configuration, add the swift3 middleware in front of the swauth middleware, and before any other middleware that looks at Object Storage requests (like rate limiting).

Ensure that your proxy-server.conf file contains swift3 in the pipeline and the [filter:swift3] section, as shown below:

[pipeline:main]
pipeline = catch_errors healthcheck cache swift3 swauth proxy-server

[filter:swift3]
use = egg:swift3#swift3

Next, configure the tool that you use to connect to the S3 API. For S3curl, for example, you must add your host IP information by adding your host IP to the @endpoints array (line 33 in s3curl.pl):

my @endpoints = ( '1.2.3.4');

Now you can send commands to the endpoint, such as:

$ ./s3curl.pl - 'a7811544507ebaf6c9a7a8804f47ea1c' \
  -key 'a7d8e981-e296-d2ba-cb3b-db7dd23159bd' \
  -get - -s -v http://1.2.3.4:8080

To set up your client, ensure you are using the ec2 credentials, which can be downloaded from the API Endpoints tab of the dashboard. The host should also point to the Object Storage node’s hostname. It also will have to use the old-style calling format, and not the hostname-based container format. Here is an example client setup using the Python boto library on a locally installed all-in-one Object Storage installation.

connection = boto.s3.Connection(
    aws_access_key_id='a7811544507ebaf6c9a7a8804f47ea1c',
    aws_secret_access_key='a7d8e981-e296-d2ba-cb3b-db7dd23159bd',
    port=8080,
    host='127.0.0.1',
    is_secure=False,
    calling_format=boto.s3.connection.OrdinaryCallingFormat())