How do I create a Swift only user

asked 2015-01-15 05:24:48 -0500

Krist gravatar image

I want to backup stuff to swift from within an instance. Therefore I need to enter credentials for a user that can write objects to a swift container in the backup script. For security reasons I want to limit what this user can as much as possible.

So given a tenant, I want to create a user in the tenant that can not log in to horizon, cannot use the API to spawn instances or even just list/get stuff. I want this user to be able to do only one thing: Write objects in a specified swift container.

How should I go about this?

I am thinking along the lines of:

  • Create another role "_swift_", and assigning that to this user, but not the "_member_" role. I would also assign this _swift_ role to all other users.

  • Modifying proxy-server.conf so that it contains this role. like this:

use = egg:swift#keystoneauth
operator_roles = admin, SwiftOperator, _swift_
  • Then add some ACLS maybe?

Would this work, or would this break thing?

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Sounds about right. You don't need any ACLs after step2. Better yet, you can just use swiftoperator in most cases.

zaitcev gravatar imagezaitcev ( 2015-01-16 10:12:32 -0500 )edit

I tested this now, and it is not working as expected. I created a user with only the SwiftOperator role, (removed _member_) but this user has full access to everything on the tenant. What have I overlooked?

Krist gravatar imageKrist ( 2015-01-19 02:02:47 -0500 )edit

Denial is different from adding roles. Swift allows all access to the user with the same name as the tenant (such as zaitcev:zaitcev). It's called "owner" and works regardless of e.g. swiftoperator role.

zaitcev gravatar imagezaitcev ( 2015-01-19 11:54:11 -0500 )edit

My problem is that it's not just swift that allows access. It's nova as well. I removed _member_ as a role from a user, and this user could still log in to Horizon, and could still stop and start instances. Also this user could use the nova command line tool. I want a swift only user.

Krist gravatar imageKrist ( 2015-01-20 00:28:10 -0500 )edit

Did you ever get this working? Or find another solution?

Bazze gravatar imageBazze ( 2015-11-12 14:54:46 -0500 )edit