Manage GCP Security Command Center IAM Permissions

The gcp:securitycenter/v2OrganizationSourceIamMember:V2OrganizationSourceIamMember resource, part of the Pulumi GCP provider, grants IAM permissions on Security Command Center v2 organization sources using non-authoritative member-level bindings. This guide focuses on two capabilities: non-authoritative member grants and how they compare with policy and binding resources.

Security Command Center IAM resources reference existing sources and IAM principals. Three related resources serve different use cases: V2OrganizationSourceIamPolicy replaces the entire policy, V2OrganizationSourceIamBinding manages all members for a role, and V2OrganizationSourceIamMember adds individual members. The examples are intentionally small. Choose the resource type that matches your access management needs.

Replace the entire IAM policy for a source

When you need complete control over who can access a Security Command Center source, you can set the entire IAM policy at once.

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 any existing policy on the source. The policyData comes from getIAMPolicy, which defines bindings that map roles to members. Use this approach when you want to define all permissions in one place, but be aware it will remove any grants not included in the policy.

Grant a role to multiple members at once

Teams often need to grant the same role to several users or service accounts while preserving 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 single role: it sets the complete member list for that role but leaves other roles unchanged. The members property accepts a list of identities (users, service accounts, groups). This approach works well when you manage all members for a role together.

Add a single member to a role incrementally

When you need to grant access to one additional user without managing the full member list, non-authoritative grants let you add permissions incrementally.

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 existing members. The member property accepts a single identity. This is the most flexible approach for incremental access grants, letting multiple team members or automation add permissions independently.

Beyond these examples

These snippets focus on specific IAM management approaches: authoritative vs non-authoritative management and policy-level, role-level, and member-level grants. They’re intentionally minimal rather than complete access control configurations.

The examples reference pre-existing infrastructure such as Security Command Center v2 organization sources and IAM principals (users, service accounts, groups). They focus on granting permissions rather than creating the underlying sources.

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

Conditional IAM bindings (condition property)
Custom role definitions and formatting
Conflict resolution between resource types

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 V2OrganizationSourceIamMember resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

Which IAM resource should I use to manage Security Command Center source permissions?

You have three options: V2OrganizationSourceIamPolicy (authoritative, replaces entire policy), V2OrganizationSourceIamBinding (authoritative for a specific role, preserves other roles), or V2OrganizationSourceIamMember (non-authoritative, adds individual members while preserving others).

Can I use V2OrganizationSourceIamPolicy with V2OrganizationSourceIamBinding or V2OrganizationSourceIamMember?

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

Can I use V2OrganizationSourceIamBinding with V2OrganizationSourceIamMember?

Yes, but only if they don’t grant privileges to the same role. Using both resources for the same role will cause conflicts.

IAM Configuration

What member identity formats are supported?

Supported formats include:

allUsers and allAuthenticatedUsers (special identifiers)
user:{email}, serviceAccount:{email}, group:{email} (Google identities)
domain:{domain} (G Suite domains)
projectOwner:{projectid}, projectEditor:{projectid}, projectViewer:{projectid} (project roles)
Federated identities (e.g., principal://iam.googleapis.com/...)

How do I specify custom roles?

Custom roles must use the full format [projects|organizations]/{parent-name}/roles/{role-name}, such as projects/my-project/roles/my-custom-role or organizations/my-org/roles/my-custom-role.

Resource Properties

What properties can't be changed after creating the resource?

All properties are immutable: member, role, organization, source, and condition. You must recreate the resource to change any of these values.

How do I import an existing IAM member resource?

Use space-delimited identifiers: the resource path, role, and member identity. For example:

pulumi import gcp:securitycenter/v2OrganizationSourceIamMember:V2OrganizationSourceIamMember editor "organizations/{{organization}}/sources/{{source}} roles/viewer user:jane@example.com"

Using a different cloud?

Explore security guides for other cloud providers:

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