Manage GCP Runtime Config IAM Members

The gcp:runtimeconfig/configIamMember:ConfigIamMember resource, part of the Pulumi GCP provider, manages IAM permissions for Runtime Configurator Config resources by adding individual member bindings without affecting other existing permissions. This guide focuses on three approaches: non-authoritative member grants, authoritative role bindings, and full policy replacement.

These resources reference existing Runtime Config resources and GCP projects. The examples are intentionally small. Combine them with your own Runtime Config infrastructure and identity management.

Grant a role to a single member non-authoritatively

When you need to add one identity without affecting existing permissions, ConfigIamMember preserves all other members and roles.

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 a single identity using formats like user:jane@example.com, serviceAccount:app@project.iam.gserviceaccount.com, or group:team@example.com. The config property references an existing Runtime Config by name. This resource adds the binding without removing other members who have the same role or other roles on the config.

Grant a role to multiple members authoritatively

When you need to define the complete list of identities for a specific role, ConfigIamBinding replaces all members for that role.

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 identities. ConfigIamBinding is authoritative for the specified role: it replaces any existing members for roles/viewer but leaves other roles untouched. You can combine ConfigIamBinding with ConfigIamMember as long as they don’t grant the same role.

Replace the entire IAM policy authoritatively

When you need complete control over all IAM bindings, ConfigIamPolicy replaces the entire policy.

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 policyData property comes from gcp.organizations.getIAMPolicy, which constructs a complete policy document from bindings. ConfigIamPolicy is the most authoritative option: it replaces all roles and members on the config. You cannot use ConfigIamPolicy alongside ConfigIamBinding or ConfigIamMember, as they will conflict over policy ownership.

Beyond these examples

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

The examples reference pre-existing infrastructure such as Runtime Config resources and GCP projects. They focus on IAM binding configuration rather than provisioning the underlying resources.

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

Conditional IAM bindings (condition property)
Custom role definitions
Service account creation
Federated identity 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 Config IAM Member resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

Why are my IAM resources conflicting with each other?

ConfigIamPolicy cannot be used with ConfigIamBinding or ConfigIamMember because they will fight over the policy. Additionally, ConfigIamBinding and ConfigIamMember will conflict if they manage the same role.

Which IAM resource should I use for Runtime Configurator configs?

Use ConfigIamPolicy for full policy control (replaces entire policy), ConfigIamBinding to manage all members of a specific role (preserves other roles), or ConfigIamMember to add individual members (preserves other members for the role).

Can I use ConfigIamBinding and ConfigIamMember together?

Yes, but only if they don’t grant privileges to the same role. If they manage different roles, they can coexist without conflicts.

Configuration & Identity Formats

What member identity formats are supported?

Supported formats include user:{email}, serviceAccount:{email}, group:{email}, domain:{domain}, allUsers, allAuthenticatedUsers, projectOwner:projectid, projectEditor:projectid, projectViewer:projectid, and federated identities like principal://iam.googleapis.com/....

What format do I use 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.

Immutability & Limitations

Can I change the role, member, or config after creation?

No, all properties (config, member, project, role) are immutable and cannot be changed after the resource is created.

Is this resource generally available or in beta?

This resource is in beta and requires the terraform-provider-google-beta provider.

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

ConfigIamPolicy is authoritative and replaces the entire IAM policy. ConfigIamBinding is authoritative for a given role and updates all members for that role while preserving other roles. ConfigIamMember is non-authoritative and adds a single member to a role while preserving other members.

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