Manage GCP Security Command Center IAM Policies

The gcp:securitycenter/v2OrganizationSourceIamPolicy:V2OrganizationSourceIamPolicy resource, part of the Pulumi GCP provider, manages IAM policies for Security Command Center v2 organization sources, controlling who can access and manage security findings. This guide focuses on three approaches: authoritative policy replacement, role-level member binding, and incremental member addition.

IAM resources for SCC sources reference existing sources and IAM principals. The examples are intentionally small. Combine them with your own source infrastructure and access control requirements.

Replace the entire IAM policy for a source

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

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.securitycenter.V2OrganizationSourceIamPolicy("policy", {
    source: customSource.name,
    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.securitycenter.V2OrganizationSourceIamPolicy("policy",
    source=custom_source["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/organizations"
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/securitycenter"
	"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 = securitycenter.NewV2OrganizationSourceIamPolicy(ctx, "policy", &securitycenter.V2OrganizationSourceIamPolicyArgs{
			Source:     pulumi.Any(customSource.Name),
			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.SecurityCenter.V2OrganizationSourceIamPolicy("policy", new()
    {
        Source = customSource.Name,
        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.securitycenter.V2OrganizationSourceIamPolicy;
import com.pulumi.gcp.securitycenter.V2OrganizationSourceIamPolicyArgs;
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 V2OrganizationSourceIamPolicy("policy", V2OrganizationSourceIamPolicyArgs.builder()
            .source(customSource.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:securitycenter:V2OrganizationSourceIamPolicy
    properties:
      source: ${customSource.name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/viewer
            members:
              - user:jane@example.com

The V2OrganizationSourceIamPolicy resource is authoritative: it replaces the entire IAM policy for the source. The policyData property accepts output from the getIAMPolicy data source, which defines bindings between roles and members. This approach gives you full control but requires managing all access in one place. You cannot use this resource alongside V2OrganizationSourceIamBinding or V2OrganizationSourceIamMember for the same source, as they will conflict over policy ownership.

Grant a role to multiple members at once

When multiple users or service accounts need the same access level, you can bind them all to a single role without affecting other role assignments.

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

const binding = new gcp.securitycenter.V2OrganizationSourceIamBinding("binding", {
    source: customSource.name,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.securitycenter.V2OrganizationSourceIamBinding("binding",
    source=custom_source["name"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := securitycenter.NewV2OrganizationSourceIamBinding(ctx, "binding", &securitycenter.V2OrganizationSourceIamBindingArgs{
			Source: pulumi.Any(customSource.Name),
			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.SecurityCenter.V2OrganizationSourceIamBinding("binding", new()
    {
        Source = customSource.Name,
        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.securitycenter.V2OrganizationSourceIamBinding;
import com.pulumi.gcp.securitycenter.V2OrganizationSourceIamBindingArgs;
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 V2OrganizationSourceIamBinding("binding", V2OrganizationSourceIamBindingArgs.builder()
            .source(customSource.name())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:securitycenter:V2OrganizationSourceIamBinding
    properties:
      source: ${customSource.name}
      role: roles/viewer
      members:
        - user:jane@example.com

The V2OrganizationSourceIamBinding resource is authoritative for a specific role: it defines all members who have that role. The members property accepts a list of IAM principals (users, service accounts, groups). Other roles on the source remain unchanged. You can use multiple binding resources for different roles, but each role should have only one binding resource to avoid conflicts.

Add a single member to a role incrementally

When you need to grant access to one additional user without managing the full membership list, you can add individual members to a role.

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

const member = new gcp.securitycenter.V2OrganizationSourceIamMember("member", {
    source: customSource.name,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.securitycenter.V2OrganizationSourceIamMember("member",
    source=custom_source["name"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := securitycenter.NewV2OrganizationSourceIamMember(ctx, "member", &securitycenter.V2OrganizationSourceIamMemberArgs{
			Source: pulumi.Any(customSource.Name),
			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.SecurityCenter.V2OrganizationSourceIamMember("member", new()
    {
        Source = customSource.Name,
        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.securitycenter.V2OrganizationSourceIamMember;
import com.pulumi.gcp.securitycenter.V2OrganizationSourceIamMemberArgs;
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 V2OrganizationSourceIamMember("member", V2OrganizationSourceIamMemberArgs.builder()
            .source(customSource.name())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:securitycenter:V2OrganizationSourceIamMember
    properties:
      source: ${customSource.name}
      role: roles/viewer
      member: user:jane@example.com

The V2OrganizationSourceIamMember resource is non-authoritative: it adds one member to a role without affecting other members. The member property specifies a single IAM principal. This approach works well when different teams manage access independently. You can combine member resources with binding resources as long as they don’t grant the same role.

Beyond these examples

These snippets focus on specific IAM management approaches: authoritative vs non-authoritative access control, and policy, binding, and member-level configuration. They’re intentionally minimal rather than full access control systems.

The examples reference pre-existing infrastructure such as Security Command Center v2 organization sources and IAM principals (users, service accounts, groups). They focus on managing access control rather than provisioning sources or principals.

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

Conditional IAM bindings (condition blocks)
Custom role definitions and references
IAM policy conflict resolution strategies
Audit logging for IAM changes

These omissions are intentional: the goal is to illustrate how each IAM resource type is wired, not provide drop-in access control modules. See the V2OrganizationSourceIamPolicy resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Compatibility

What's the difference between IamPolicy, IamBinding, and IamMember resources?

V2OrganizationSourceIamPolicy is authoritative and replaces the entire IAM policy. V2OrganizationSourceIamBinding is authoritative for a specific role, preserving other roles. V2OrganizationSourceIamMember is non-authoritative, adding individual members while preserving existing members for that role.

Can I use IamPolicy together with IamBinding or IamMember?

No, V2OrganizationSourceIamPolicy cannot be used with V2OrganizationSourceIamBinding or V2OrganizationSourceIamMember because they will conflict over policy control.

Can I use IamBinding and IamMember together?

Yes, but only if they don’t grant privileges to the same role. Each role must be managed by only one resource type.

Configuration & Setup

How do I generate the policyData for V2OrganizationSourceIamPolicy?

Use the gcp.organizations.getIAMPolicy data source to generate policyData, then pass it to the V2OrganizationSourceIamPolicy resource.

What properties are immutable after creation?

Both organization and source are immutable and cannot be changed after the resource is created.

Import & Custom Roles

How do I import an IAM resource with a custom role?

Use the full custom role name in the format [projects/my-project|organizations/my-org]/roles/my-custom-role when importing.

Using a different cloud?

Explore security guides for other cloud providers:

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