Manage GCP GKE Hub Membership IAM Access

The gcp:gkehub/membershipIamMember:MembershipIamMember resource, part of the Pulumi GCP provider, manages IAM permissions for GKE Hub memberships by adding individual members to roles without affecting other permissions. This guide focuses on three approaches: adding single members to roles, managing all members for a role, and replacing entire IAM policies.

GKE Hub memberships must exist before you can configure IAM. The three IAM resources (MembershipIamMember, MembershipIamBinding, MembershipIamPolicy) serve different use cases and have compatibility constraints: MembershipIamPolicy cannot be used with the other two, while MembershipIamBinding and MembershipIamMember can coexist only if they manage different roles. The examples are intentionally small. Combine them with your own membership references and identity management strategy.

Grant a single user access to a membership

Most IAM configurations add individual users or service accounts to specific roles without disrupting existing permissions.

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

const member = new gcp.gkehub.MembershipIamMember("member", {
    project: membership.project,
    location: membership.location,
    membershipId: membership.membershipId,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.gkehub.MembershipIamMember("member",
    project=membership["project"],
    location=membership["location"],
    membership_id=membership["membershipId"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := gkehub.NewMembershipIamMember(ctx, "member", &gkehub.MembershipIamMemberArgs{
			Project:      pulumi.Any(membership.Project),
			Location:     pulumi.Any(membership.Location),
			MembershipId: pulumi.Any(membership.MembershipId),
			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.GkeHub.MembershipIamMember("member", new()
    {
        Project = membership.Project,
        Location = membership.Location,
        MembershipId = membership.MembershipId,
        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.gkehub.MembershipIamMember;
import com.pulumi.gcp.gkehub.MembershipIamMemberArgs;
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 MembershipIamMember("member", MembershipIamMemberArgs.builder()
            .project(membership.project())
            .location(membership.location())
            .membershipId(membership.membershipId())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:gkehub:MembershipIamMember
    properties:
      project: ${membership.project}
      location: ${membership.location}
      membershipId: ${membership.membershipId}
      role: roles/viewer
      member: user:jane@example.com

The member property specifies one identity using formats like “user:jane@example.com” or “serviceAccount:app@project.iam.gserviceaccount.com”. The role property defines what that identity can do. MembershipIamMember is non-authoritative: it adds this one member to the role while preserving other members and roles on the membership.

Grant a role to multiple members at once

When several identities need the same access level, MembershipIamBinding manages all members for a single role as a group.

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

const binding = new gcp.gkehub.MembershipIamBinding("binding", {
    project: membership.project,
    location: membership.location,
    membershipId: membership.membershipId,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.gkehub.MembershipIamBinding("binding",
    project=membership["project"],
    location=membership["location"],
    membership_id=membership["membershipId"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := gkehub.NewMembershipIamBinding(ctx, "binding", &gkehub.MembershipIamBindingArgs{
			Project:      pulumi.Any(membership.Project),
			Location:     pulumi.Any(membership.Location),
			MembershipId: pulumi.Any(membership.MembershipId),
			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.GkeHub.MembershipIamBinding("binding", new()
    {
        Project = membership.Project,
        Location = membership.Location,
        MembershipId = membership.MembershipId,
        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.gkehub.MembershipIamBinding;
import com.pulumi.gcp.gkehub.MembershipIamBindingArgs;
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 MembershipIamBinding("binding", MembershipIamBindingArgs.builder()
            .project(membership.project())
            .location(membership.location())
            .membershipId(membership.membershipId())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:gkehub:MembershipIamBinding
    properties:
      project: ${membership.project}
      location: ${membership.location}
      membershipId: ${membership.membershipId}
      role: roles/viewer
      members:
        - user:jane@example.com

The members property lists all identities that should have this role. MembershipIamBinding is authoritative for the specified role: it replaces any existing members for that role while leaving other roles untouched. If you later add another MembershipIamMember for the same role, they’ll conflict.

Replace the entire IAM policy for a membership

Organizations that need complete control over all roles and members define the entire IAM policy in one place.

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.gkehub.MembershipIamPolicy("policy", {
    project: membership.project,
    location: membership.location,
    membershipId: membership.membershipId,
    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.gkehub.MembershipIamPolicy("policy",
    project=membership["project"],
    location=membership["location"],
    membership_id=membership["membershipId"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/gkehub"
	"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 = gkehub.NewMembershipIamPolicy(ctx, "policy", &gkehub.MembershipIamPolicyArgs{
			Project:      pulumi.Any(membership.Project),
			Location:     pulumi.Any(membership.Location),
			MembershipId: pulumi.Any(membership.MembershipId),
			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.GkeHub.MembershipIamPolicy("policy", new()
    {
        Project = membership.Project,
        Location = membership.Location,
        MembershipId = membership.MembershipId,
        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.gkehub.MembershipIamPolicy;
import com.pulumi.gcp.gkehub.MembershipIamPolicyArgs;
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 MembershipIamPolicy("policy", MembershipIamPolicyArgs.builder()
            .project(membership.project())
            .location(membership.location())
            .membershipId(membership.membershipId())
            .policyData(admin.policyData())
            .build());

    }
}

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

The policyData property comes from getIAMPolicy, which constructs a complete policy document with all roles and members. MembershipIamPolicy is fully authoritative: it replaces the entire IAM policy for the membership. You cannot use this resource alongside MembershipIamBinding or MembershipIamMember, as they’ll conflict over policy ownership.

Beyond these examples

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

The examples reference pre-existing infrastructure such as GKE Hub memberships (by membershipId) and Google Cloud projects and locations. They focus on IAM configuration rather than provisioning the underlying memberships.

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

Conditional IAM bindings (condition property)
Custom role definitions
IAM policy retrieval (data source)
Audit logging configuration

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 GKE Hub MembershipIamMember resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

Which IAM resource should I use for managing GKE Hub Membership permissions?

Choose based on your needs:

gcp.gkehub.MembershipIamPolicy: Authoritative control of the entire IAM policy (replaces existing policy)
gcp.gkehub.MembershipIamBinding: Authoritative for a specific role (manages all members for that role, preserves other roles)
gcp.gkehub.MembershipIamMember: Non-authoritative (adds individual members, preserves existing members and roles)

Can I use these IAM resources together?

gcp.gkehub.MembershipIamPolicy cannot be used with gcp.gkehub.MembershipIamBinding or gcp.gkehub.MembershipIamMember as they will conflict over the policy. However, gcp.gkehub.MembershipIamBinding and gcp.gkehub.MembershipIamMember can be used together only if they grant privileges to different roles.

IAM Configuration

What member identity formats are supported?

Supported formats include:

allUsers: Anyone on the internet
allAuthenticatedUsers: Anyone with a Google account
user:{email}: Specific Google account (e.g., user:alice@gmail.com)
serviceAccount:{email}: Service account (e.g., serviceAccount:my-app@appspot.gserviceaccount.com)
group:{email}: Google group (e.g., group:admins@example.com)
domain:{domain}: All users in a G Suite domain (e.g., domain:example.com)
projectOwner:projectid, projectEditor:projectid, projectViewer:projectid: Project-level roles
Federated identities (see Principal identifiers documentation for examples)

How do I specify a custom IAM role?

Custom roles must use the 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.

What's the default location for a membership?

The default location is global. If not specified, the location is parsed from the parent resource identifier or taken from the provider configuration.

Common Tasks

How do I grant a role to a single user?

Use gcp.gkehub.MembershipIamMember with the member property set to user:{email}, such as user:jane@example.com.

How do I grant a role to multiple users at once?

Use gcp.gkehub.MembershipIamBinding with the members property containing a list of identities.

Import & Advanced

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

Use the full custom role name in the import command, formatted as [projects/my-project|organizations/my-org]/roles/my-custom-role.

Using a different cloud?

Explore security guides for other cloud providers:

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