Manage GCP Identity-Aware Proxy IAM Policies

The gcp:iap/webRegionForwardingRuleServiceIamPolicy:WebRegionForwardingRuleServiceIamPolicy resource, part of the Pulumi GCP provider, manages IAM policies for Identity-Aware Proxy regional forwarding rule services. This guide focuses on four capabilities: authoritative policy replacement, role-specific binding management, non-authoritative member grants, and time-based IAM Conditions.

These resources reference existing regional forwarding rules configured for Identity-Aware Proxy. The examples are intentionally small. Combine them with your own forwarding rule infrastructure and organizational IAM patterns.

Replace the entire IAM policy for a forwarding rule service

Teams managing IAP access often define the complete set of permissions in one authoritative declaration.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/iap.httpsResourceAccessor",
        members: ["user:jane@example.com"],
    }],
});
const policy = new gcp.iap.WebRegionForwardingRuleServiceIamPolicy("policy", {
    project: _default.project,
    region: _default.region,
    forwardingRuleRegionServiceName: _default.name,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/iap.httpsResourceAccessor",
    "members": ["user:jane@example.com"],
}])
policy = gcp.iap.WebRegionForwardingRuleServiceIamPolicy("policy",
    project=default["project"],
    region=default["region"],
    forwarding_rule_region_service_name=default["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/iap"
	"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/iap.httpsResourceAccessor",
					Members: []string{
						"user:jane@example.com",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = iap.NewWebRegionForwardingRuleServiceIamPolicy(ctx, "policy", &iap.WebRegionForwardingRuleServiceIamPolicyArgs{
			Project:                         pulumi.Any(_default.Project),
			Region:                          pulumi.Any(_default.Region),
			ForwardingRuleRegionServiceName: pulumi.Any(_default.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/iap.httpsResourceAccessor",
                Members = new[]
                {
                    "user:jane@example.com",
                },
            },
        },
    });

    var policy = new Gcp.Iap.WebRegionForwardingRuleServiceIamPolicy("policy", new()
    {
        Project = @default.Project,
        Region = @default.Region,
        ForwardingRuleRegionServiceName = @default.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.iap.WebRegionForwardingRuleServiceIamPolicy;
import com.pulumi.gcp.iap.WebRegionForwardingRuleServiceIamPolicyArgs;
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/iap.httpsResourceAccessor")
                .members("user:jane@example.com")
                .build())
            .build());

        var policy = new WebRegionForwardingRuleServiceIamPolicy("policy", WebRegionForwardingRuleServiceIamPolicyArgs.builder()
            .project(default_.project())
            .region(default_.region())
            .forwardingRuleRegionServiceName(default_.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:iap:WebRegionForwardingRuleServiceIamPolicy
    properties:
      project: ${default.project}
      region: ${default.region}
      forwardingRuleRegionServiceName: ${default.name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/iap.httpsResourceAccessor
            members:
              - user:jane@example.com

The WebRegionForwardingRuleServiceIamPolicy resource sets the entire IAM policy, replacing any existing bindings. The policyData comes from a getIAMPolicy data source that defines roles and members. The forwardingRuleRegionServiceName identifies which forwarding rule service to manage. This approach is authoritative: it removes any bindings not declared in your policy.

Grant a role to multiple members with binding

When multiple users need the same role, binding resources manage the complete member list for that role.

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

const binding = new gcp.iap.WebRegionForwardingRuleServiceIamBinding("binding", {
    project: _default.project,
    region: _default.region,
    forwardingRuleRegionServiceName: _default.name,
    role: "roles/iap.httpsResourceAccessor",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.iap.WebRegionForwardingRuleServiceIamBinding("binding",
    project=default["project"],
    region=default["region"],
    forwarding_rule_region_service_name=default["name"],
    role="roles/iap.httpsResourceAccessor",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := iap.NewWebRegionForwardingRuleServiceIamBinding(ctx, "binding", &iap.WebRegionForwardingRuleServiceIamBindingArgs{
			Project:                         pulumi.Any(_default.Project),
			Region:                          pulumi.Any(_default.Region),
			ForwardingRuleRegionServiceName: pulumi.Any(_default.Name),
			Role:                            pulumi.String("roles/iap.httpsResourceAccessor"),
			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.Iap.WebRegionForwardingRuleServiceIamBinding("binding", new()
    {
        Project = @default.Project,
        Region = @default.Region,
        ForwardingRuleRegionServiceName = @default.Name,
        Role = "roles/iap.httpsResourceAccessor",
        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.iap.WebRegionForwardingRuleServiceIamBinding;
import com.pulumi.gcp.iap.WebRegionForwardingRuleServiceIamBindingArgs;
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 WebRegionForwardingRuleServiceIamBinding("binding", WebRegionForwardingRuleServiceIamBindingArgs.builder()
            .project(default_.project())
            .region(default_.region())
            .forwardingRuleRegionServiceName(default_.name())
            .role("roles/iap.httpsResourceAccessor")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:iap:WebRegionForwardingRuleServiceIamBinding
    properties:
      project: ${default.project}
      region: ${default.region}
      forwardingRuleRegionServiceName: ${default.name}
      role: roles/iap.httpsResourceAccessor
      members:
        - user:jane@example.com

The WebRegionForwardingRuleServiceIamBinding resource manages all members for a single role. The members array lists principals who receive the role. Other roles in the policy remain unchanged. You can use multiple binding resources for different roles, but only one binding per role to avoid conflicts.

Add a single member to a role non-authoritatively

Applications that grant access incrementally add individual principals without managing the full member list.

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

const member = new gcp.iap.WebRegionForwardingRuleServiceIamMember("member", {
    project: _default.project,
    region: _default.region,
    forwardingRuleRegionServiceName: _default.name,
    role: "roles/iap.httpsResourceAccessor",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.iap.WebRegionForwardingRuleServiceIamMember("member",
    project=default["project"],
    region=default["region"],
    forwarding_rule_region_service_name=default["name"],
    role="roles/iap.httpsResourceAccessor",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := iap.NewWebRegionForwardingRuleServiceIamMember(ctx, "member", &iap.WebRegionForwardingRuleServiceIamMemberArgs{
			Project:                         pulumi.Any(_default.Project),
			Region:                          pulumi.Any(_default.Region),
			ForwardingRuleRegionServiceName: pulumi.Any(_default.Name),
			Role:                            pulumi.String("roles/iap.httpsResourceAccessor"),
			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.Iap.WebRegionForwardingRuleServiceIamMember("member", new()
    {
        Project = @default.Project,
        Region = @default.Region,
        ForwardingRuleRegionServiceName = @default.Name,
        Role = "roles/iap.httpsResourceAccessor",
        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.iap.WebRegionForwardingRuleServiceIamMember;
import com.pulumi.gcp.iap.WebRegionForwardingRuleServiceIamMemberArgs;
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 WebRegionForwardingRuleServiceIamMember("member", WebRegionForwardingRuleServiceIamMemberArgs.builder()
            .project(default_.project())
            .region(default_.region())
            .forwardingRuleRegionServiceName(default_.name())
            .role("roles/iap.httpsResourceAccessor")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:iap:WebRegionForwardingRuleServiceIamMember
    properties:
      project: ${default.project}
      region: ${default.region}
      forwardingRuleRegionServiceName: ${default.name}
      role: roles/iap.httpsResourceAccessor
      member: user:jane@example.com

The WebRegionForwardingRuleServiceIamMember resource grants a role to one principal. The member property specifies a single identity. This resource is non-authoritative: it adds the member without affecting other members of the same role. Use this when you need to grant access without knowing or managing the complete member list.

Apply time-based access with IAM Conditions

Temporary access grants use IAM Conditions to expire permissions automatically.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/iap.httpsResourceAccessor",
        members: ["user:jane@example.com"],
        condition: {
            title: "expires_after_2019_12_31",
            description: "Expiring at midnight of 2019-12-31",
            expression: "request.time < timestamp(\"2020-01-01T00:00:00Z\")",
        },
    }],
});
const policy = new gcp.iap.WebRegionForwardingRuleServiceIamPolicy("policy", {
    project: _default.project,
    region: _default.region,
    forwardingRuleRegionServiceName: _default.name,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/iap.httpsResourceAccessor",
    "members": ["user:jane@example.com"],
    "condition": {
        "title": "expires_after_2019_12_31",
        "description": "Expiring at midnight of 2019-12-31",
        "expression": "request.time < timestamp(\"2020-01-01T00:00:00Z\")",
    },
}])
policy = gcp.iap.WebRegionForwardingRuleServiceIamPolicy("policy",
    project=default["project"],
    region=default["region"],
    forwarding_rule_region_service_name=default["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/iap"
	"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/iap.httpsResourceAccessor",
					Members: []string{
						"user:jane@example.com",
					},
					Condition: {
						Title:       "expires_after_2019_12_31",
						Description: pulumi.StringRef("Expiring at midnight of 2019-12-31"),
						Expression:  "request.time < timestamp(\"2020-01-01T00:00:00Z\")",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = iap.NewWebRegionForwardingRuleServiceIamPolicy(ctx, "policy", &iap.WebRegionForwardingRuleServiceIamPolicyArgs{
			Project:                         pulumi.Any(_default.Project),
			Region:                          pulumi.Any(_default.Region),
			ForwardingRuleRegionServiceName: pulumi.Any(_default.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/iap.httpsResourceAccessor",
                Members = new[]
                {
                    "user:jane@example.com",
                },
                Condition = new Gcp.Organizations.Inputs.GetIAMPolicyBindingConditionInputArgs
                {
                    Title = "expires_after_2019_12_31",
                    Description = "Expiring at midnight of 2019-12-31",
                    Expression = "request.time < timestamp(\"2020-01-01T00:00:00Z\")",
                },
            },
        },
    });

    var policy = new Gcp.Iap.WebRegionForwardingRuleServiceIamPolicy("policy", new()
    {
        Project = @default.Project,
        Region = @default.Region,
        ForwardingRuleRegionServiceName = @default.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.iap.WebRegionForwardingRuleServiceIamPolicy;
import com.pulumi.gcp.iap.WebRegionForwardingRuleServiceIamPolicyArgs;
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/iap.httpsResourceAccessor")
                .members("user:jane@example.com")
                .condition(GetIAMPolicyBindingConditionArgs.builder()
                    .title("expires_after_2019_12_31")
                    .description("Expiring at midnight of 2019-12-31")
                    .expression("request.time < timestamp(\"2020-01-01T00:00:00Z\")")
                    .build())
                .build())
            .build());

        var policy = new WebRegionForwardingRuleServiceIamPolicy("policy", WebRegionForwardingRuleServiceIamPolicyArgs.builder()
            .project(default_.project())
            .region(default_.region())
            .forwardingRuleRegionServiceName(default_.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:iap:WebRegionForwardingRuleServiceIamPolicy
    properties:
      project: ${default.project}
      region: ${default.region}
      forwardingRuleRegionServiceName: ${default.name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/iap.httpsResourceAccessor
            members:
              - user:jane@example.com
            condition:
              title: expires_after_2019_12_31
              description: Expiring at midnight of 2019-12-31
              expression: request.time < timestamp("2020-01-01T00:00:00Z")

The condition block adds temporal constraints to IAM bindings. The expression uses Common Expression Language (CEL) to compare request.time against a timestamp. The title and description document the condition’s purpose. IAM Conditions work with all three resource types (Policy, Binding, Member) and support various expressions beyond time-based checks.

Beyond these examples

These snippets focus on specific IAM management features: authoritative vs non-authoritative IAM management, policy/binding/member resource types, and time-based IAM Conditions. They’re intentionally minimal rather than complete access control configurations.

The examples reference pre-existing infrastructure such as regional forwarding rules configured for Identity-Aware Proxy, and GCP project and region context. They focus on IAM policy configuration rather than provisioning the underlying forwarding rules.

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

Condition expressions beyond time-based expiration
Multiple conditions per binding
IAM audit logging configuration
Service account impersonation

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 WebRegionForwardingRuleServiceIamPolicy resource reference for all available configuration options.

Let's manage GCP Identity-Aware Proxy IAM Policies

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Frequently Asked Questions

Resource Selection & Conflicts

Which IAM resource should I use: Policy, Binding, or Member?

Choose based on your management approach:

WebRegionForwardingRuleServiceIamPolicy is authoritative and replaces the entire IAM policy
WebRegionForwardingRuleServiceIamBinding is authoritative for a specific role but preserves other roles
WebRegionForwardingRuleServiceIamMember is non-authoritative and adds individual members without affecting others

Why am I getting IAM policy conflicts between my resources?

WebRegionForwardingRuleServiceIamPolicy cannot be used with WebRegionForwardingRuleServiceIamBinding or WebRegionForwardingRuleServiceIamMember because they will fight over the policy state. Use Policy alone, or use Binding/Member together.

Can I use IamBinding and IamMember resources together?

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

IAM Conditions

How do I add time-based or conditional access controls?

Add a condition block with title, description, and expression fields to any of the three IAM resource types. For example, use request.time < timestamp("2020-01-01T00:00:00Z") to expire access at a specific time.

What are the limitations of IAM Conditions?

IAM Conditions have known limitations that may affect functionality. Review the GCP IAM Conditions limitations documentation before implementing conditions.

Configuration & Properties

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

Four properties are immutable: forwardingRuleRegionServiceName, project, and region. Changing any of these requires recreating the resource.

What formats can I use when importing existing IAM policies?

Four formats are supported:

Full path: projects/{{project}}/iap_web/forwarding_rule-{{region}}/services/{{name}}
{{project}}/{{region}}/{{name}}
{{region}}/{{name}}
{{name}}

Variables not specified in the import command are taken from the provider configuration.

Using a different cloud?

Explore security guides for other cloud providers:

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