Manage GCP Runtime Config IAM Policies

The gcp:runtimeconfig/configIamPolicy:ConfigIamPolicy resource, part of the Pulumi GCP provider, manages IAM policies for Runtime Configurator configs, controlling who can read or modify configuration data. This guide focuses on three approaches: authoritative policy replacement (ConfigIamPolicy), role-level member management (ConfigIamBinding), and individual member grants (ConfigIamMember).

These resources reference an existing Runtime Configurator config and require appropriate GCP project permissions. The examples are intentionally small. Combine them with your own config resources and organizational IAM structure.

Replace the entire IAM policy for a config

When you need complete control over 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.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

The ConfigIamPolicy resource is authoritative: it replaces the entire IAM policy on the config. The policyData comes from the getIAMPolicy data source, which defines bindings (role-to-members mappings). This approach gives you full control but overwrites any existing policy.

Grant a role to multiple members at once

Teams often need to grant the same role to several users without affecting other roles already assigned.

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 ConfigIamBinding resource is authoritative for a single role: it sets the complete member list for that role while preserving other roles on the config. The members array lists all identities that should have this role. If you later remove a member from this list, they lose access.

Add a single member to a role incrementally

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

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 ConfigIamMember resource is non-authoritative: it adds one member to a role without affecting other members already assigned to that role. This is useful when multiple teams manage access independently. You can use multiple ConfigIamMember resources for the same role, and they won’t conflict.

Beyond these examples

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

The examples reference pre-existing infrastructure such as Runtime Configurator config resources and GCP projects with appropriate permissions. They focus on IAM policy configuration rather than provisioning the underlying config resources.

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

Conditional IAM bindings (condition blocks)
Custom role definitions
Service account impersonation
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 Runtime Configurator ConfigIamPolicy resource reference for all available configuration options.

Let's manage GCP Runtime Config IAM Policies

Get started with Pulumi Cloud, then follow our quick setup guide to deploy this infrastructure.

Try Pulumi Cloud for FREE

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, managing all members for that role while preserving other roles. ConfigIamMember is non-authoritative and adds individual members without affecting other members for the same role.

Why am I seeing conflicts between my IAM resources?

ConfigIamPolicy cannot be used with ConfigIamBinding or ConfigIamMember because they will conflict over policy state. Choose either ConfigIamPolicy alone for full control, or use ConfigIamBinding/ConfigIamMember for granular management.

Can I use ConfigIamBinding and ConfigIamMember together?

Yes, but only if they manage different roles. Using both resources for the same role will cause conflicts.

Configuration & Properties

What properties can't I change after creating the resource?

Both config and project are immutable and cannot be changed after creation.

How do I get the policyData for ConfigIamPolicy?

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

Beta Status & Stability

Is this resource production-ready?

This resource is in beta and requires the terraform-provider-google-beta provider. Be aware of potential API changes.

Using a different cloud?

Explore security guides for other cloud providers:

AWS Guides Azure Guides