Manage GCP Runtime Config IAM Members

The gcp:runtimeconfig/configIamMember:ConfigIamMember resource, part of the Pulumi GCP provider, manages IAM access to Runtime Configurator configs by granting roles to identities. This guide focuses on three capabilities: single-member role grants, multi-member role bindings, and complete policy replacement.

Three related resources manage config IAM: ConfigIamMember (non-authoritative, adds one member), ConfigIamBinding (authoritative for a role, manages all members), and ConfigIamPolicy (authoritative for all roles, replaces entire policy). ConfigIamPolicy cannot be used with the other two; they will conflict. The examples are intentionally small. Combine them with your own Runtime Configurator configs and identity management.

Grant a role to a single member

Most IAM configurations add one identity to a role without affecting existing assignments.

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

const member = new gcp.runtimeconfig.ConfigIamMember("member", {
    project: config.project,
    config: config.name,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.runtimeconfig.ConfigIamMember("member",
    project=config["project"],
    config=config["name"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := runtimeconfig.NewConfigIamMember(ctx, "member", &runtimeconfig.ConfigIamMemberArgs{
			Project: pulumi.Any(config.Project),
			Config:  pulumi.Any(config.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.RuntimeConfig.ConfigIamMember("member", new()
    {
        Project = config.Project,
        Config = config.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.runtimeconfig.ConfigIamMember;
import com.pulumi.gcp.runtimeconfig.ConfigIamMemberArgs;
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 ConfigIamMember("member", ConfigIamMemberArgs.builder()
            .project(config.project())
            .config(config.name())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:runtimeconfig:ConfigIamMember
    properties:
      project: ${config.project}
      config: ${config.name}
      role: roles/viewer
      member: user:jane@example.com

The member property specifies one identity using formats like user:jane@example.com, serviceAccount:app@project.iam.gserviceaccount.com, or group:team@example.com. ConfigIamMember is non-authoritative: it adds this member to the role without removing others. You can create multiple ConfigIamMember resources for the same role.

Grant a role to multiple members at once

When several identities need the same role, ConfigIamBinding manages the complete member list.

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

const binding = new gcp.runtimeconfig.ConfigIamBinding("binding", {
    project: config.project,
    config: config.name,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.runtimeconfig.ConfigIamBinding("binding",
    project=config["project"],
    config=config["name"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := runtimeconfig.NewConfigIamBinding(ctx, "binding", &runtimeconfig.ConfigIamBindingArgs{
			Project: pulumi.Any(config.Project),
			Config:  pulumi.Any(config.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.RuntimeConfig.ConfigIamBinding("binding", new()
    {
        Project = config.Project,
        Config = config.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.runtimeconfig.ConfigIamBinding;
import com.pulumi.gcp.runtimeconfig.ConfigIamBindingArgs;
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 ConfigIamBinding("binding", ConfigIamBindingArgs.builder()
            .project(config.project())
            .config(config.name())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:runtimeconfig:ConfigIamBinding
    properties:
      project: ${config.project}
      config: ${config.name}
      role: roles/viewer
      members:
        - user:jane@example.com

The members property takes an array of identity strings. ConfigIamBinding is authoritative for this role: it replaces the member list with exactly what you specify. Other roles on the config remain unchanged. You can use ConfigIamBinding and ConfigIamMember together if they target different roles.

Replace the entire IAM policy

Some deployments require complete control over all role bindings.

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.runtimeconfig.ConfigIamPolicy("policy", {
    project: config.project,
    config: config.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.runtimeconfig.ConfigIamPolicy("policy",
    project=config["project"],
    config=config["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/runtimeconfig"
	"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 = runtimeconfig.NewConfigIamPolicy(ctx, "policy", &runtimeconfig.ConfigIamPolicyArgs{
			Project:    pulumi.Any(config.Project),
			Config:     pulumi.Any(config.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.RuntimeConfig.ConfigIamPolicy("policy", new()
    {
        Project = config.Project,
        Config = config.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.runtimeconfig.ConfigIamPolicy;
import com.pulumi.gcp.runtimeconfig.ConfigIamPolicyArgs;
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 ConfigIamPolicy("policy", ConfigIamPolicyArgs.builder()
            .project(config.project())
            .config(config.name())
            .policyData(admin.policyData())
            .build());

    }
}

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

ConfigIamPolicy sets the entire IAM policy from a data source. The getIAMPolicy data source constructs policy data from bindings. This resource is fully authoritative: it replaces all existing bindings. ConfigIamPolicy cannot coexist with ConfigIamBinding or ConfigIamMember; use one approach or the other.

Beyond these examples

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

The examples reference pre-existing infrastructure such as Runtime Configurator config resources and a GCP project with provider configuration. They focus on IAM binding configuration rather than creating the underlying configs.

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

Conditional IAM bindings (condition property)
Custom role definitions and formatting
Federated identity and workload identity pool configuration
Cross-project IAM grants (explicit project property)

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 Runtime Configurator ConfigIamMember resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

What's the difference between ConfigIamPolicy, ConfigIamBinding, and ConfigIamMember?

ConfigIamPolicy is authoritative and replaces the entire IAM policy. ConfigIamBinding is authoritative for a specific role, preserving other roles. ConfigIamMember is non-authoritative, adding a single member to a role while preserving existing members.

Can I use these IAM resources together?

ConfigIamPolicy cannot be used with ConfigIamBinding or ConfigIamMember as they’ll conflict over policy management. You can use ConfigIamBinding with ConfigIamMember only if they manage different roles.

Which IAM resource should I use for my use case?

Use ConfigIamPolicy for complete policy control, ConfigIamBinding to manage all members for a specific role, or ConfigIamMember to add individual members without affecting others.

Configuration & Identity Formats

What member identity formats are supported?

Supported formats include allUsers, allAuthenticatedUsers, user:{emailid}, serviceAccount:{emailid}, group:{emailid}, domain:{domain}, projectOwner:projectid, projectEditor:projectid, projectViewer:projectid, and federated identities using principal:// syntax.

What's the correct format for custom roles?

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

Immutability & Updates

Can I modify properties after creating the resource?

No, all properties (config, member, project, role, and condition) are immutable. Changing any of these requires recreating the resource.

How do I import existing IAM resources?

Use space-delimited identifiers: for members, use "projects/{{project}}/configs/{{config}} roles/viewer user:jane@example.com". For bindings, omit the member. For policies, use only the resource identifier.

Using a different cloud?

Explore security guides for other cloud providers:

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