87 lines
2.5 KiB
Markdown
87 lines
2.5 KiB
Markdown
SwiftPolicy Middleware
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----------------------
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The SwiftPolicy Middleware for OpenStack Swift allows to use a JSON policy file
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to handle swift authorizations.
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SwiftPolicy is an adaptation of the keystoneauth middleware here:
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https://github.com/openstack/swift/blob/master/swift/common/middleware/keystoneauth.py
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Install
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-------
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1) Install SwiftPolicy with ``sudo python setup.py install`` or ``sudo python
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setup.py develop``.
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2) Alter your proxy-server.conf pipeline to include SwiftPolicy:
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For example, you can use SwiftPolicy in place of the keystoneauth middleware:
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Change::
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[pipeline:main]
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pipeline = catch_errors cache tempauth proxy-server
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To::
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[pipeline:main]
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pipeline = catch_errors cache swiftpolicy tempauth proxy-server
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3) Add to your proxy-server.conf the section for the SwiftPolicy WSGI filter.
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The policy file is set with the ``policy`` option ::
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[filter:swift3]
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use = egg:swiftpolicy#swiftpolicy
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policy = %(here)s/default.json
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This middleware comes with a default policy file in /etc/swift/default.json that maintains
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compatibility with keystoneauth.
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Policy file
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-----------
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The policy file will list all possible actions on a swift proxy.
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Action's syntax is: ``<http verb>_<swift entity>`` (example: "get_container", "put_object", etc).
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...
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"get_container": "rule:allowed_for_user",
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"put_container": "rule:allowed_for_user",
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"delete_container": "rule:allowed_for_user",
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...
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The policy file contains also two specific rules: "swift_owner" "reseller_request", they are defined
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when swift_owner and reseller_request headers are set to true, as those two values are part
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of the contract with the auth system (more details here: http://docs.openstack.org/developer/swift/overview_auth.html)
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...
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"swift_owner": "rule:swift_reseller or rule:swift_operator",
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"reseller_request": "rule:swift_reseller",
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...
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Example
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-------
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* To forbid the creation of new containers: set put_container to '!':
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...
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"get_container": "rule:allowed_for_user",
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"put_container": "!",
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...
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* To restrict the creation of new containers to users with the role "admin":
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...
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"get_container": "rule:allowed_for_user",
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"put_container": "role:admin",
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...
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Limitations
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-----------
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* swiftpolicy does not support dynamic reload of policies, and thus, the swift proxy has
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to be restarted when the policy file is updated.
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