Manage GCP Dataplex Datascan IAM Policies

The gcp:dataplex/datascanIamPolicy:DatascanIamPolicy resource, part of the Pulumi GCP provider, manages IAM permissions for Dataplex datascans using three distinct approaches. This guide focuses on three capabilities: authoritative policy replacement (DatascanIamPolicy), role-level member binding (DatascanIamBinding), and incremental member addition (DatascanIamMember).

These resources reference existing datascan resources by dataScanId. DatascanIamPolicy cannot be used with DatascanIamBinding or DatascanIamMember because they conflict over policy ownership. DatascanIamBinding and DatascanIamMember can coexist only if they manage different roles. The examples are intentionally small. Choose the approach that matches your access control requirements.

Replace the entire IAM policy for a datascan

When you need complete control over datascan permissions, you can set the entire IAM policy at once, replacing any existing assignments.

import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/viewer",
        members: ["user:jane@example.com"],
    }],
});
const policy = new gcp.dataplex.DatascanIamPolicy("policy", {
    project: basicProfile.project,
    location: basicProfile.location,
    dataScanId: basicProfile.dataScanId,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/viewer",
    "members": ["user:jane@example.com"],
}])
policy = gcp.dataplex.DatascanIamPolicy("policy",
    project=basic_profile["project"],
    location=basic_profile["location"],
    data_scan_id=basic_profile["dataScanId"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/dataplex"
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/organizations"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		admin, err := organizations.LookupIAMPolicy(ctx, &organizations.LookupIAMPolicyArgs{
			Bindings: []organizations.GetIAMPolicyBinding{
				{
					Role: "roles/viewer",
					Members: []string{
						"user:jane@example.com",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = dataplex.NewDatascanIamPolicy(ctx, "policy", &dataplex.DatascanIamPolicyArgs{
			Project:    pulumi.Any(basicProfile.Project),
			Location:   pulumi.Any(basicProfile.Location),
			DataScanId: pulumi.Any(basicProfile.DataScanId),
			PolicyData: pulumi.String(admin.PolicyData),
		})
		if err != nil {
			return err
		}
		return nil
	})
}

using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Gcp = Pulumi.Gcp;

return await Deployment.RunAsync(() => 
{
    var admin = Gcp.Organizations.GetIAMPolicy.Invoke(new()
    {
        Bindings = new[]
        {
            new Gcp.Organizations.Inputs.GetIAMPolicyBindingInputArgs
            {
                Role = "roles/viewer",
                Members = new[]
                {
                    "user:jane@example.com",
                },
            },
        },
    });

    var policy = new Gcp.DataPlex.DatascanIamPolicy("policy", new()
    {
        Project = basicProfile.Project,
        Location = basicProfile.Location,
        DataScanId = basicProfile.DataScanId,
        PolicyData = admin.Apply(getIAMPolicyResult => getIAMPolicyResult.PolicyData),
    });

});

package generated_program;

import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.organizations.OrganizationsFunctions;
import com.pulumi.gcp.organizations.inputs.GetIAMPolicyArgs;
import com.pulumi.gcp.dataplex.DatascanIamPolicy;
import com.pulumi.gcp.dataplex.DatascanIamPolicyArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }

    public static void stack(Context ctx) {
        final var admin = OrganizationsFunctions.getIAMPolicy(GetIAMPolicyArgs.builder()
            .bindings(GetIAMPolicyBindingArgs.builder()
                .role("roles/viewer")
                .members("user:jane@example.com")
                .build())
            .build());

        var policy = new DatascanIamPolicy("policy", DatascanIamPolicyArgs.builder()
            .project(basicProfile.project())
            .location(basicProfile.location())
            .dataScanId(basicProfile.dataScanId())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:dataplex:DatascanIamPolicy
    properties:
      project: ${basicProfile.project}
      location: ${basicProfile.location}
      dataScanId: ${basicProfile.dataScanId}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/viewer
            members:
              - user:jane@example.com

DatascanIamPolicy is authoritative: it replaces the entire IAM policy with the one you provide. The policyData property accepts output from the getIAMPolicy data source, which defines bindings between roles and members. This approach gives you full control but removes any permissions not explicitly listed.

Grant a role to multiple members at once

Teams often need to assign the same role to several users or service accounts without affecting other role assignments.

import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";

const binding = new gcp.dataplex.DatascanIamBinding("binding", {
    project: basicProfile.project,
    location: basicProfile.location,
    dataScanId: basicProfile.dataScanId,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.dataplex.DatascanIamBinding("binding",
    project=basic_profile["project"],
    location=basic_profile["location"],
    data_scan_id=basic_profile["dataScanId"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/dataplex"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := dataplex.NewDatascanIamBinding(ctx, "binding", &dataplex.DatascanIamBindingArgs{
			Project:    pulumi.Any(basicProfile.Project),
			Location:   pulumi.Any(basicProfile.Location),
			DataScanId: pulumi.Any(basicProfile.DataScanId),
			Role:       pulumi.String("roles/viewer"),
			Members: pulumi.StringArray{
				pulumi.String("user:jane@example.com"),
			},
		})
		if err != nil {
			return err
		}
		return nil
	})
}

using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Gcp = Pulumi.Gcp;

return await Deployment.RunAsync(() => 
{
    var binding = new Gcp.DataPlex.DatascanIamBinding("binding", new()
    {
        Project = basicProfile.Project,
        Location = basicProfile.Location,
        DataScanId = basicProfile.DataScanId,
        Role = "roles/viewer",
        Members = new[]
        {
            "user:jane@example.com",
        },
    });

});

package generated_program;

import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.dataplex.DatascanIamBinding;
import com.pulumi.gcp.dataplex.DatascanIamBindingArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }

    public static void stack(Context ctx) {
        var binding = new DatascanIamBinding("binding", DatascanIamBindingArgs.builder()
            .project(basicProfile.project())
            .location(basicProfile.location())
            .dataScanId(basicProfile.dataScanId())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:dataplex:DatascanIamBinding
    properties:
      project: ${basicProfile.project}
      location: ${basicProfile.location}
      dataScanId: ${basicProfile.dataScanId}
      role: roles/viewer
      members:
        - user:jane@example.com

DatascanIamBinding is authoritative for a single role: it sets the complete member list for that role while preserving other roles on the datascan. The members property accepts a list of identities (users, service accounts, groups). This approach lets you manage one role’s membership without touching other roles.

Add a single member to a role incrementally

When you want to grant access to one user without disturbing existing members of that role, you can add them individually.

import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";

const member = new gcp.dataplex.DatascanIamMember("member", {
    project: basicProfile.project,
    location: basicProfile.location,
    dataScanId: basicProfile.dataScanId,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.dataplex.DatascanIamMember("member",
    project=basic_profile["project"],
    location=basic_profile["location"],
    data_scan_id=basic_profile["dataScanId"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/dataplex"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := dataplex.NewDatascanIamMember(ctx, "member", &dataplex.DatascanIamMemberArgs{
			Project:    pulumi.Any(basicProfile.Project),
			Location:   pulumi.Any(basicProfile.Location),
			DataScanId: pulumi.Any(basicProfile.DataScanId),
			Role:       pulumi.String("roles/viewer"),
			Member:     pulumi.String("user:jane@example.com"),
		})
		if err != nil {
			return err
		}
		return nil
	})
}

using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Gcp = Pulumi.Gcp;

return await Deployment.RunAsync(() => 
{
    var member = new Gcp.DataPlex.DatascanIamMember("member", new()
    {
        Project = basicProfile.Project,
        Location = basicProfile.Location,
        DataScanId = basicProfile.DataScanId,
        Role = "roles/viewer",
        Member = "user:jane@example.com",
    });

});

package generated_program;

import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.dataplex.DatascanIamMember;
import com.pulumi.gcp.dataplex.DatascanIamMemberArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }

    public static void stack(Context ctx) {
        var member = new DatascanIamMember("member", DatascanIamMemberArgs.builder()
            .project(basicProfile.project())
            .location(basicProfile.location())
            .dataScanId(basicProfile.dataScanId())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:dataplex:DatascanIamMember
    properties:
      project: ${basicProfile.project}
      location: ${basicProfile.location}
      dataScanId: ${basicProfile.dataScanId}
      role: roles/viewer
      member: user:jane@example.com

DatascanIamMember is non-authoritative: it adds one member to a role without affecting other members of that role or other roles on the datascan. The member property accepts a single identity. This approach is useful when multiple teams manage access independently, as each can add members without coordinating.

Beyond these examples

These snippets focus on specific IAM management approaches: authoritative policy replacement, role-level binding management, and incremental member addition. They’re intentionally minimal rather than full access control configurations.

The examples reference pre-existing infrastructure such as Dataplex datascan resources (referenced by dataScanId). They focus on IAM policy configuration rather than provisioning the datascans themselves.

To keep things focused, common IAM patterns are omitted, including:

Conditional IAM bindings (condition blocks)
Service account impersonation
Custom role definitions
Policy conflict resolution strategies

These omissions are intentional: the goal is to illustrate how each IAM management approach is wired, not provide drop-in access control modules. See the Datascan IAM Policy resource reference for all available configuration options.

Let's manage GCP Dataplex Datascan IAM Policies

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Frequently Asked Questions

Resource Selection & Conflicts

Why am I getting IAM policy conflicts with my Datascan?

DatascanIamPolicy cannot be used alongside DatascanIamBinding or DatascanIamMember, as they will conflict over the policy. Use DatascanIamPolicy alone, or use only DatascanIamBinding and DatascanIamMember together.

Can I use DatascanIamBinding and DatascanIamMember together?

Yes, but only if they don’t grant privileges to the same role. If both resources target the same role, they will conflict.

Which IAM resource should I use for my Datascan?

Choose based on your needs:

DatascanIamPolicy - Authoritative, replaces the entire policy
DatascanIamBinding - Authoritative per role, preserves other roles
DatascanIamMember - Non-authoritative, preserves other members for the role

Configuration & Setup

What's required to configure a DatascanIamPolicy?

You need dataScanId, location, project, and policyData. The location and project can be inferred from the parent resource identifier or provider configuration if not explicitly specified.

How do I generate the policyData for DatascanIamPolicy?

Use the gcp.organizations.getIAMPolicy data source to generate the policy data, as shown in the examples.

Import & Migration

How do I import an existing Datascan IAM policy?

Use the format projects/{{project}}/locations/{{location}}/dataScans/{{data_scan_id}} for policy imports. For member imports, append the role and member identity space-delimited. For binding imports, append only the role.

Using a different cloud?

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