ceph/doc/radosgw/role.rst
Pritha Srivastava 57a4f6b43f rgw/sts: adding code for UpdateRole REST API and
radosgw-admin command that allows modification
of max_session_duration of a role.

fixes: https://tracker.ceph.com/issues/55751

Signed-off-by: Pritha Srivastava <prsrivas@redhat.com>
2022-06-15 14:55:56 +05:30

571 lines
16 KiB
ReStructuredText

======
Role
======
A role is similar to a user and has permission policies attached to it, that determine what a role can or can not do. A role can be assumed by any identity that needs it. If a user assumes a role, a set of dynamically created temporary credentials are returned to the user. A role can be used to delegate access to users, applications, services that do not have permissions to access some s3 resources.
The following radosgw-admin commands can be used to create/ delete/ update a role and permissions associated with a role.
Create a Role
-------------
To create a role, execute the following::
radosgw-admin role create --role-name={role-name} [--path=="{path to the role}"] [--assume-role-policy-doc={trust-policy-document}]
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
``path``
:Description: Path to the role. The default value is a slash(/).
:Type: String
``assume-role-policy-doc``
:Description: The trust relationship policy document that grants an entity permission to assume the role.
:Type: String
For example::
radosgw-admin role create --role-name=S3Access1 --path=/application_abc/component_xyz/ --assume-role-policy-doc=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Principal\":\{\"AWS\":\[\"arn:aws:iam:::user/TESTER\"\]\},\"Action\":\[\"sts:AssumeRole\"\]\}\]\}
.. code-block:: javascript
{
"id": "ca43045c-082c-491a-8af1-2eebca13deec",
"name": "S3Access1",
"path": "/application_abc/component_xyz/",
"arn": "arn:aws:iam:::role/application_abc/component_xyz/S3Access1",
"create_date": "2018-10-17T10:18:29.116Z",
"max_session_duration": 3600,
"assume_role_policy_document": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"AWS\":[\"arn:aws:iam:::user/TESTER\"]},\"Action\":[\"sts:AssumeRole\"]}]}"
}
Delete a Role
-------------
To delete a role, execute the following::
radosgw-admin role delete --role-name={role-name}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
For example::
radosgw-admin role delete --role-name=S3Access1
Note: A role can be deleted only when it doesn't have any permission policy attached to it.
Get a Role
----------
To get information about a role, execute the following::
radosgw-admin role get --role-name={role-name}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
For example::
radosgw-admin role get --role-name=S3Access1
.. code-block:: javascript
{
"id": "ca43045c-082c-491a-8af1-2eebca13deec",
"name": "S3Access1",
"path": "/application_abc/component_xyz/",
"arn": "arn:aws:iam:::role/application_abc/component_xyz/S3Access1",
"create_date": "2018-10-17T10:18:29.116Z",
"max_session_duration": 3600,
"assume_role_policy_document": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"AWS\":[\"arn:aws:iam:::user/TESTER\"]},\"Action\":[\"sts:AssumeRole\"]}]}"
}
List Roles
----------
To list roles with a specified path prefix, execute the following::
radosgw-admin role list [--path-prefix ={path prefix}]
Request Parameters
~~~~~~~~~~~~~~~~~~
``path-prefix``
:Description: Path prefix for filtering roles. If this is not specified, all roles are listed.
:Type: String
For example::
radosgw-admin role list --path-prefix="/application"
.. code-block:: javascript
[
{
"id": "3e1c0ff7-8f2b-456c-8fdf-20f428ba6a7f",
"name": "S3Access1",
"path": "/application_abc/component_xyz/",
"arn": "arn:aws:iam:::role/application_abc/component_xyz/S3Access1",
"create_date": "2018-10-17T10:32:01.881Z",
"max_session_duration": 3600,
"assume_role_policy_document": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"AWS\":[\"arn:aws:iam:::user/TESTER\"]},\"Action\":[\"sts:AssumeRole\"]}]}"
}
]
Update Assume Role Policy Document of a role
--------------------------------------------
To modify a role's assume role policy document, execute the following::
radosgw-admin role-trust-policy modify --role-name={role-name} --assume-role-policy-doc={trust-policy-document}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
``assume-role-policy-doc``
:Description: The trust relationship policy document that grants an entity permission to assume the role.
:Type: String
For example::
radosgw-admin role-trust-policy modify --role-name=S3Access1 --assume-role-policy-doc=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Principal\":\{\"AWS\":\[\"arn:aws:iam:::user/TESTER2\"\]\},\"Action\":\[\"sts:AssumeRole\"\]\}\]\}
.. code-block:: javascript
{
"id": "ca43045c-082c-491a-8af1-2eebca13deec",
"name": "S3Access1",
"path": "/application_abc/component_xyz/",
"arn": "arn:aws:iam:::role/application_abc/component_xyz/S3Access1",
"create_date": "2018-10-17T10:18:29.116Z",
"max_session_duration": 3600,
"assume_role_policy_document": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"AWS\":[\"arn:aws:iam:::user/TESTER2\"]},\"Action\":[\"sts:AssumeRole\"]}]}"
}
In the above example, we are modifying the Principal from TESTER to TESTER2 in its assume role policy document.
Add/ Update a Policy attached to a Role
---------------------------------------
To add or update the inline policy attached to a role, execute the following::
radosgw-admin role policy put --role-name={role-name} --policy-name={policy-name} --policy-doc={permission-policy-doc}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
``policy-name``
:Description: Name of the policy.
:Type: String
``policy-doc``
:Description: The Permission policy document.
:Type: String
For example::
radosgw-admin role-policy put --role-name=S3Access1 --policy-name=Policy1 --policy-doc=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Action\":\[\"s3:*\"\],\"Resource\":\"arn:aws:s3:::example_bucket\"\}\]\}
For passing ``policy-doc`` as a file::
radosgw-admin role-policy put --role-name=S3Access1 --policy-name=Policy1 --infile policy-document.json
In the above example, we are attaching a policy 'Policy1' to role 'S3Access1', which allows all s3 actions on 'example_bucket'.
List Permission Policy Names attached to a Role
-----------------------------------------------
To list the names of permission policies attached to a role, execute the following::
radosgw-admin role policy get --role-name={role-name}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
For example::
radosgw-admin role-policy list --role-name=S3Access1
.. code-block:: javascript
[
"Policy1"
]
Get Permission Policy attached to a Role
----------------------------------------
To get a specific permission policy attached to a role, execute the following::
radosgw-admin role policy get --role-name={role-name} --policy-name={policy-name}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
``policy-name``
:Description: Name of the policy.
:Type: String
For example::
radosgw-admin role-policy get --role-name=S3Access1 --policy-name=Policy1
.. code-block:: javascript
{
"Permission policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Action\":[\"s3:*\"],\"Resource\":\"arn:aws:s3:::example_bucket\"}]}"
}
Delete Policy attached to a Role
--------------------------------
To delete permission policy attached to a role, execute the following::
radosgw-admin role policy delete --role-name={role-name} --policy-name={policy-name}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
``policy-name``
:Description: Name of the policy.
:Type: String
For example::
radosgw-admin role-policy delete --role-name=S3Access1 --policy-name=Policy1
Update a role
-------------
To update a role's max-session-duration, execute the following::
radosgw-admin role update --role-name={role-name} --max-session-duration={max-session-duration}
Request Parameters
~~~~~~~~~~~~~~~~~~
``role-name``
:Description: Name of the role.
:Type: String
``max-session-duration``
:Description: Maximum session duration for a role.
:Type: String
For example::
radosgw-admin role update --role-name=S3Access1 --max-session-duration=43200
Note: This command currently can only be used to update max-session-duration.
REST APIs for Manipulating a Role
=================================
In addition to the above radosgw-admin commands, the following REST APIs can be used for manipulating a role. For the request parameters and their explanations, refer to the sections above.
In order to invoke the REST admin APIs, a user with admin caps needs to be created.
.. code-block:: javascript
radosgw-admin --uid TESTER --display-name "TestUser" --access_key TESTER --secret test123 user create
radosgw-admin caps add --uid="TESTER" --caps="roles=*"
Create a Role
-------------
Example::
POST "<hostname>?Action=CreateRole&RoleName=S3Access&Path=/application_abc/component_xyz/&AssumeRolePolicyDocument=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Principal\":\{\"AWS\":\[\"arn:aws:iam:::user/TESTER\"\]\},\"Action\":\[\"sts:AssumeRole\"\]\}\]\}"
.. code-block:: XML
<role>
<id>8f41f4e0-7094-4dc0-ac20-074a881ccbc5</id>
<name>S3Access</name>
<path>/application_abc/component_xyz/</path>
<arn>arn:aws:iam:::role/application_abc/component_xyz/S3Access</arn>
<create_date>2018-10-23T07:43:42.811Z</create_date>
<max_session_duration>3600</max_session_duration>
<assume_role_policy_document>{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"AWS":["arn:aws:iam:::user/TESTER"]},"Action":["sts:AssumeRole"]}]}</assume_role_policy_document>
</role>
Delete a Role
-------------
Example::
POST "<hostname>?Action=DeleteRole&RoleName=S3Access"
Note: A role can be deleted only when it doesn't have any permission policy attached to it.
Get a Role
----------
Example::
POST "<hostname>?Action=GetRole&RoleName=S3Access"
.. code-block:: XML
<role>
<id>8f41f4e0-7094-4dc0-ac20-074a881ccbc5</id>
<name>S3Access</name>
<path>/application_abc/component_xyz/</path>
<arn>arn:aws:iam:::role/application_abc/component_xyz/S3Access</arn>
<create_date>2018-10-23T07:43:42.811Z</create_date>
<max_session_duration>3600</max_session_duration>
<assume_role_policy_document>{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"AWS":["arn:aws:iam:::user/TESTER"]},"Action":["sts:AssumeRole"]}]}</assume_role_policy_document>
</role>
List Roles
----------
Example::
POST "<hostname>?Action=ListRoles&RoleName=S3Access&PathPrefix=/application"
.. code-block:: XML
<role>
<id>8f41f4e0-7094-4dc0-ac20-074a881ccbc5</id>
<name>S3Access</name>
<path>/application_abc/component_xyz/</path>
<arn>arn:aws:iam:::role/application_abc/component_xyz/S3Access</arn>
<create_date>2018-10-23T07:43:42.811Z</create_date>
<max_session_duration>3600</max_session_duration>
<assume_role_policy_document>{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"AWS":["arn:aws:iam:::user/TESTER"]},"Action":["sts:AssumeRole"]}]}</assume_role_policy_document>
</role>
Update Assume Role Policy Document
----------------------------------
Example::
POST "<hostname>?Action=UpdateAssumeRolePolicy&RoleName=S3Access&PolicyDocument=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Principal\":\{\"AWS\":\[\"arn:aws:iam:::user/TESTER2\"\]\},\"Action\":\[\"sts:AssumeRole\"\]\}\]\}"
Add/ Update a Policy attached to a Role
---------------------------------------
Example::
POST "<hostname>?Action=PutRolePolicy&RoleName=S3Access&PolicyName=Policy1&PolicyDocument=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Action\":\[\"s3:CreateBucket\"\],\"Resource\":\"arn:aws:s3:::example_bucket\"\}\]\}"
List Permission Policy Names attached to a Role
-----------------------------------------------
Example::
POST "<hostname>?Action=ListRolePolicies&RoleName=S3Access"
.. code-block:: XML
<PolicyNames>
<member>Policy1</member>
</PolicyNames>
Get Permission Policy attached to a Role
----------------------------------------
Example::
POST "<hostname>?Action=GetRolePolicy&RoleName=S3Access&PolicyName=Policy1"
.. code-block:: XML
<GetRolePolicyResult>
<PolicyName>Policy1</PolicyName>
<RoleName>S3Access</RoleName>
<Permission_policy>{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Action":["s3:CreateBucket"],"Resource":"arn:aws:s3:::example_bucket"}]}</Permission_policy>
</GetRolePolicyResult>
Delete Policy attached to a Role
--------------------------------
Example::
POST "<hostname>?Action=DeleteRolePolicy&RoleName=S3Access&PolicyName=Policy1"
Tag a role
----------
A role can have multivalued tags attached to it. These tags can be passed in as part of CreateRole REST API also.
AWS does not support multi-valued role tags.
Example::
POST "<hostname>?Action=TagRole&RoleName=S3Access&Tags.member.1.Key=Department&Tags.member.1.Value=Engineering"
.. code-block:: XML
<TagRoleResponse>
<ResponseMetadata>
<RequestId>tx000000000000000000004-00611f337e-1027-default</RequestId>
</ResponseMetadata>
</TagRoleResponse>
List role tags
--------------
Lists the tags attached to a role.
Example::
POST "<hostname>?Action=ListRoleTags&RoleName=S3Access"
.. code-block:: XML
<ListRoleTagsResponse>
<ListRoleTagsResult>
<Tags>
<member>
<Key>Department</Key>
<Value>Engineering</Value>
</member>
</Tags>
</ListRoleTagsResult>
<ResponseMetadata>
<RequestId>tx000000000000000000005-00611f337e-1027-default</RequestId>
</ResponseMetadata>
</ListRoleTagsResponse>
Delete role tags
----------------
Delete a tag/ tags attached to a role.
Example::
POST "<hostname>?Action=UntagRoles&RoleName=S3Access&TagKeys.member.1=Department"
.. code-block:: XML
<UntagRoleResponse>
<ResponseMetadata>
<RequestId>tx000000000000000000007-00611f337e-1027-default</RequestId>
</ResponseMetadata>
</UntagRoleResponse>
Update Role
-----------
Example::
POST "<hostname>?Action=UpdateRole&RoleName=S3Access&MaxSessionDuration=43200"
.. code-block:: XML
<UpdateRoleResponse>
<UpdateRoleResult>
<ResponseMetadata>
<RequestId>tx000000000000000000007-00611f337e-1027-default</RequestId>
</ResponseMetadata>
</UpdateRoleResult>
</UpdateRoleResponse>
Note: This API currently can only be used to update max-session-duration.
Sample code for tagging, listing tags and untagging a role
----------------------------------------------------------
The following is sample code for adding tags to role, listing tags and untagging a role using boto3.
.. code-block:: python
import boto3
access_key = 'TESTER'
secret_key = 'test123'
iam_client = boto3.client('iam',
aws_access_key_id=access_key,
aws_secret_access_key=secret_key,
endpoint_url='http://s3.us-east.localhost:8000',
region_name=''
)
policy_document = "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"Federated\":[\"arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart\"]},\"Action\":[\"sts:AssumeRoleWithWebIdentity\"],\"Condition\":{\"StringEquals\":{\"localhost:8080/auth/realms/quickstart:sub\":\"user1\"}}}]}"
print ("\n Creating Role with tags\n")
tags_list = [
{'Key':'Department','Value':'Engineering'}
]
role_response = iam_client.create_role(
AssumeRolePolicyDocument=policy_document,
Path='/',
RoleName='S3Access',
Tags=tags_list,
)
print ("Adding tags to role\n")
response = iam_client.tag_role(
RoleName='S3Access',
Tags= [
{'Key':'CostCenter','Value':'123456'}
]
)
print ("Listing role tags\n")
response = iam_client.list_role_tags(
RoleName='S3Access'
)
print (response)
print ("Untagging role\n")
response = iam_client.untag_role(
RoleName='S3Access',
TagKeys=[
'Department',
]
)