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AWS Glue Identity-Based (IAM) Access-Control Policy With Tags Examples

This section contains example AWS Identity and Access Management (IAM) policies with tags to control permissions for various AWS Glue actions and resources. You can copy these examples and edit them on the IAM console. Then you can attach them to IAM identities such as users, roles, and groups.

You can control access to crawlers, jobs, triggers, and development endpoints by attaching tags and specifying resourceTag conditions in IAM policies.

Example Access Control Using Tags

For example, suppose you want to limit access to a trigger t2 to a specific user named Tom in your account. All other users, including Sam, have access to trigger t1. The triggers t1 and t2 have the following properties.

aws glue get-triggers
{
    "Triggers": [
        {
            "State": "CREATED",
            "Type": "SCHEDULED",
            "Name": "t1",
            "Actions": [
                {
                    "JobName": "j1"
                }
            ],
            "Schedule": "cron(0 0/1 * * ? *)"
        },
        {
            "State": "CREATED",
            "Type": "SCHEDULED",
            "Name": "t2",
            "Actions": [
                {
                    "JobName": "j1"
                }
            ],
            "Schedule": "cron(0 0/1 * * ? *)"
        }
    ]
}

The AWS Glue administrator attached a tag value Tom (glue:resourceTag/Name": "Tom") to trigger t2. The AWS Glue administrator also gave Tom an IAM policy with a condition statement based on the tag. As a result, Tom can only use an AWS Glue operation that acts on resources with the tag value Tom.

{
    "Version": "2012-10-17",
    "Statement": [
        {
         "Effect": "Allow",
         "Action": "glue:*",
         "Resource": "*",
         "Condition": {
             "StringEquals": {
                "glue:resourceTag/Name": "Tom"
              }
          }
         }
    ]
}

When Tom tries to access the trigger t1 he receives an access denied message. Meanwhile, he can successfully retrieve trigger t2.

aws glue get-trigger --name t1

An error occurred (AccessDeniedException) when calling the GetTrigger operation: User: Tom is not authorized to perform: glue:GetTrigger on resource: arn:aws:glue:us-east-1:123456789012:trigger/t1

aws glue get-trigger --name t2
{
    "Trigger": {
        "State": "CREATED",
        "Type": "SCHEDULED",
        "Name": "t2",
        "Actions": [
            {
                "JobName": "j1"
            }
        ],
        "Schedule": "cron(0 0/1 * * ? *)"
    }
}

Tom cannot use the plural GetTriggers API to list triggers as this API operation doesn't support filtering on tags.

To give Tom access to GetTriggers, the AWS Glue administrator creates a policy which splits the permissions into two sections. One section allows Tom access to all triggers with the GetTriggers API operation. The second section allows Tom access to API operations that are tagged with the value Tom. With this policy, Tom is allowed both GetTriggers and GetTrigger access to trigger t2.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "glue:GetTriggers",
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": "glue:*",
            "Resource": "*",
            "Condition": {
                "StringEquals": {
                    "glue:resourceTag/Name": "Tom"
                }
            }
        }
    ]
}

Example Access Control Using Tags With Deny

Another approach to write a resource policy is to explicitly deny access to resources instead of granting access to a user. For example, if Tom is considered a special user of a team, the administrator can deny access to Tom's resources to Sam and everyone else on the team. As a result, Sam can access almost every resource except those tagged with the tag value Tom. Here is the resource policy that AWS Glue administrator grants to Sam. In the first section of the policy, all AWS Glue API operations are allowed for all resources. However, in the second section, those resources tagged with Tom are denied access.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "glue:*",
            "Resource": "*"
        },
        {
            "Effect": "Deny",
            "Action": [
                "glue:*"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "glue:resourceTag/Name": "Tom"
                }
            }
        }
    ]
}

Using the same triggers as the prior example, Sam can access trigger t1, but not trigger t2. The following example shows the results when Sam tries to access t1 and t2.

aws glue get-trigger --name t1
{
    "Trigger": {
        "State": "CREATED",
        "Type": "SCHEDULED",
        "Name": "t1",
        "Actions": [
            {
                "JobName": "j1"
            }
        ],
        "Schedule": "cron(0 0/1 * * ? *)"
    }
}

aws glue get-trigger  --name t2

An error occurred (AccessDeniedException) when calling the GetTrigger operation: User: Sam is not authorized to perform: glue:GetTrigger on resource: arn:aws:glue:us-east-1:123456789012:trigger/t2 with an explicit deny

Important

An explicit denial policy does not work for plural APIs. Even with the attachment of tag value Tom to trigger t2, Sam is still able to call GetTriggers to view trigger t2. Because of this, the administrator might not want to allow access to the GetTriggers API operations. The following example shows the results when Sam runs the GetTriggers API.

aws glue get-triggers
{
    "Triggers": [
        {
            "State": "CREATED",
            "Type": "SCHEDULED",
            "Name": "t1",
            "Actions": [
                {
                    "JobName": "j1"
                }
            ],
            "Schedule": "cron(0 0/1 * * ? *)"
        },
        {
            "State": "CREATED",
            "Type": "SCHEDULED",
            "Name": "t2",
            "Actions": [
                {
                    "JobName": "j1"
                }
            ],
            "Schedule": "cron(0 0/1 * * ? *)"
        }
    ]
}

Example Access Control Using Tags With List and Batch API Operations

A third approach to write a resource policy is to allow access to resources using a List API operation to list out resources for a tag value. Then, use the corresponding Batch API operation to allow access to details of specific resources. With this approach, the adminsitrator doesn't need to allow access to the plural GetCrawlers, GetDevEndpoints, GetJobs, or GetTriggers API operations. Instead, you can allow the ability to list the resources with the following API operations:

• ListCrawlers

• ListDevEndpoints

• ListJobs

• ListTriggers

And, you can allow the ability to get details about individual resources with the following API operations:

• BatchGetCrawlers

• BatchGetDevEndpoints

• BatchGetJobs

• BatchGetTriggers

As an administrator, to make use of this approach you can:

1. Add tags to your crawlers, development endpoints, jobs, and triggers.

2. Deny user access to Get API operations such as GetCrawlers, GetDevEndponts, GetJobs, and GetTriggers.

3. To enable users to find out which tagged resources they have access to, allow user access to List API operations such as ListCrawlers, ListDevEndponts, ListJobs, and ListTriggers.

4. Deny user access to AWS Glue tagging APIs, such as TagResource and UntagResource.

5. Allow user access to resource details with BatchGet API operations such as BatchGetCrawlers, BatchGetDevEndponts, BatchGetJobs, and BatchGetTriggers.

For example, when calling the ListCrawlers operation, provide a tag value to match the user name, then the result is a list of crawlers matching the provided tag values. Provide the list of names to the BatchGetCrawlers to get details about each crawler with the given tag.

For example, if Tom should only be able to retrieve details of triggers that are tagged with Tom, the administrator can add tags to triggers for Tom, deny access to the GetTriggers API operation to all users and allow access to all users to ListTriggers and BatchGetTriggers. Here is the resource policy that the AWS Glue administrator grants to Tom. In the first section of the policy, AWS Glue API operations are denied for GetTriggers. In the second section of the policy, ListTriggers is allowed for all resources. However, in the third section, those resources tagged with Tom are allowed access with the BatchGetTriggers access.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Deny",
            "Action": "glue:GetTriggers",
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "glue:ListTriggers"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "glue:BatchGetTriggers"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "glue:resourceTag/Name": "Tom"
                }
            }
        }
    ]
}

Using the same triggers as the prior example, Tom can access trigger t2, but not trigger t1. The following example shows the results when Tom tries to access t1 and t2 with BatchGetTriggers.

aws glue batch-get-triggers --trigger-names t2
{
    "Triggers": {
        "State": "CREATED",
        "Type": "SCHEDULED",
        "Name": "t2",
        "Actions": [
            {
                "JobName": "j2"
            }
        ],
        "Schedule": "cron(0 0/1 * * ? *)"
    }
}

aws glue batch-get-triggers  --trigger-names t1

An error occurred (AccessDeniedException) when calling the BatchGetTriggers operation: No access to any requested resource.

The following example shows the results when Tom tries to access both trigger t2 and trigger t3 (which does not exist) in the same BatchGetTriggers call. Notice that because Tom has access to trigger t2 and it exists, only t2 is returned. Although Tom is allowed to access trigger t3, trigger t3 does not exist, so t3 is returned in the response in a list of "TriggersNotFound": [].

aws glue batch-get-triggers --trigger-names t2 t3
{
    "Triggers": {
        "State": "CREATED",
        "Type": "SCHEDULED",
        "Name": "t2",
        "Actions": [
            {
                "JobName": "j2"
            }
        ],
        "TriggersNotFound": ["t3"],
        "Schedule": "cron(0 0/1 * * ? *)"
    }
}