The other way to do it is with policies.
e.g. a bucket owned by user1, but read access granted to user2:
{
"Version":"2012-10-17",
"Statement":[
{
"Sid":"user2 policy",
"Effect":"Allow",
"Principal": {"AWS": ["arn:aws:iam:::user/user2"]},
"Action":["s3:GetObject","s3:ListBucket"],
"Resource":[
"arn:aws:s3:::example1/*",
"arn:aws:s3:::example1"
]
}
]
}
And set the policy with:
$ s3cmd setpolicy policy.json s3://example1/
or similar.
user2 won't see the bucket in their list of buckets, but will be able to read
and list the bucket in this case.
More at
https://docs.aws.amazon.com/AmazonS3/latest/dev/example-bucket-policies.html
Sean
On Tue, 8 May 2018, David Turner said:
> Sorry I've been on vacation, but I'm back now. The command I use to create
> subusers for a rgw user is...
>
> radosgw-admin user create --gen-access-key --gen-secret --uid=user_a
> --display_name="User A"
> radosgw-admin subuser create --gen-access-key --gen-secret
> --access={read,write,readwrite,full} --key-type=s3 --uid=user_a
> --subuser=subuser_1
>
> Now all buckets created by user_a (or a subuser with --access=full) can now
> be accessed by user_a and all user_a:subusers. What you missed was
> changing the default subuser type from swift to s3. --access=full is
> needed for any user needed to be able to create and delete buckets, the
> others are fairly self explanatory for what they can do inside of existing
> buckets.
>
> There are 2 approaches to use with subusers depending on your use case.
> The first use case is what I use for buckets. We create 1 user per bucket
> and create subusers when necessary. Most of our buckets are used by a
> single service and that's all the service uses... so they get the keys for
> their bucket and that's it. Subusers are create just for the single bucket
> that the original user is in charge of.
>
> The second use case is where you want a lot of buckets accessed by a single
> set of keys, but you want multiple people to all be able to access the
> buckets. In this case I would create a single user and use that user to
> create all of the buckets and then create the subusers for everyone to be
> able to access the various buckets. Note that with this method you get no
> more granularity to settings other than subuser_2 only has read access to
> every bucket. You can't pick and choose which buckets a subuser has write
> access to, it's all or none. That's why I use the first approach and call
> it "juggling" keys because if someone wants access to multiple buckets,
> they have keys for each individual bucket as a subuser.
>
> On Sat, May 5, 2018 at 6:28 AM Marc Roos <[email protected]> wrote:
>
> >
> > This 'juggle keys' is a bit cryptic to me. If I create a subuser it
> > becomes a swift user not? So how can that have access to the s3 or be
> > used in a s3 client. I have to put in the client the access and secret
> > key, in the subuser I only have a secret key.
> >
> > Is this multi tentant basically only limiting this buckets namespace to
> > the tenants users and nothing else?
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: David Turner [mailto:[email protected]]
> > Sent: zondag 29 april 2018 14:52
> > To: Yehuda Sadeh-Weinraub
> > Cc: [email protected]; Безруков Илья Алексеевич
> > Subject: Re: [ceph-users] How to configure s3 bucket acl so that one
> > user's bucket is visible to another.
> >
> > You can create subuser keys to allow other users to have access to a
> > bucket. You have to juggle keys, but it works pretty well.
> >
> >
> > On Sun, Apr 29, 2018, 4:00 AM Yehuda Sadeh-Weinraub <[email protected]>
> > wrote:
> >
> >
> > You can't. A user can only list the buckets that it owns, it cannot
> > list other users' buckets.
> >
> > Yehuda
> >
> > On Sat, Apr 28, 2018 at 11:10 AM, Безруков Илья Алексеевич
> > <[email protected]> wrote:
> > > Hello,
> > >
> > > How to configure s3 bucket acl so that one user's bucket is
> > visible to
> > > another.
> > >
> > >
> > > I can create a bucket, objects in it and give another user
> > access
> > to it.
> > > But another user does not see this bucket in the list of
> > available buckets.
> > >
> > >
> > > ## User1
> > >
> > > ```
> > > s3cmd -c s3cfg_user1 ls s3://
> > >
> > > 2018-04-28 07:50 s3://example1
> > >
> > > #set ACL
> > > s3cmd -c s3cfg_user1 setacl --acl-grant=all:user2 s3://example1
> > > s3://example1/: ACL updated
> > >
> > > # Check
> > > s3cmd -c s3cfg_user1 info s3://example1
> > > s3://example1/ (bucket):
> > > Location: us-east-1
> > > Payer: BucketOwner
> > > Expiration Rule: none
> > > Policy: none
> > > CORS: none
> > > ACL: User1: FULL_CONTROL
> > > ACL: User2: FULL_CONTROL
> > >
> > > # Put some data
> > > s3cmd -c s3cfg_user1 put /tmp/dmesg s3://example1
> > > upload: '/tmp/dmesg' -> 's3://example1/dmesg' [1 of 1]
> > > 5305 of 5305 100% in 0s 27.28 kB/s done
> > >
> > > #set ACL
> > > s3cmd -c s3cfg_user1 setacl --acl-grant=all:bondarenko
> > s3://example1/dmesg
> > > s3://example1/dmesg: ACL updated
> > >
> > > ```
> > >
> > > ## User2
> > > ```
> > > s3cmd -c ~/.s3cfg_user2 ls s3://
> > > 2018-04-27 14:23 s3://only_itself_dir
> > >
> > > # Check info
> > > s3cmd -c ~/.s3cfg_user2 info s3://example1
> > > ERROR: Access to bucket 'example1' was denied
> > > ERROR: S3 error: 403 (AccessDenied)
> > >
> > > # ls bucket
> > > s3cmd -c ~/.s3cfg_user2 ls s3://example1
> > > 2018-04-28 07:58 5305 s3://example1/dmesg
> > >
> > > #Get info
> > > s3cmd -c ~/.s3cfg_user2 info s3://example1/dmesg
> > > s3://example1/dmesg (object):
> > > File size: 5305
> > > Last mod: Sat, 28 Apr 2018 07:58:03 GMT
> > > MIME type: text/plain
> > > Storage: STANDARD
> > > MD5 sum: 47ddc4780956cb55abe27e851aa02cfa
> > > SSE: none
> > > Policy: none
> > > ERROR: Access to bucket 'example1' was denied
> > > ERROR: S3 error: 403 (AccessDenied)
> > >
> > > #Get object
> > > s3cmd -c ~/.s3cfg_user2 get s3://example1/dmesg /tmp/test
> > > download: 's3://example1/dmesg' -> '/tmp/test' [1 of 1]
> > > 5305 of 5305 100% in 0s 160.54 kB/s done
> > >
> > > #Put some oject to bucket
> > > s3cmd -c ~/.s3cfg_user2 put /tmp/dmesg2 s3://example1/dmesg2
> > > upload: '/tmp/dmesg2' -> 's3://example1/dmesg2' [1 of 1]
> > > 38136 of 38136 100% in 0s 455.18 kB/s done
> > > ```
> > >
> > > Best regards,
> > >
> > > Ilya
> > >
> > >
> > > _______________________________________________
> > > ceph-users mailing list
> > > [email protected]
> > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> > >
> > _______________________________________________
> > ceph-users mailing list
> > [email protected]
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >
> >
> >
> >
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