The gcp:iap/webCloudRunServiceIamPolicy:WebCloudRunServiceIamPolicy resource, part of the Pulumi GCP provider, manages IAM access policies for Cloud Run services protected by Identity-Aware Proxy. This guide focuses on two capabilities: role-based access control using binding and member resources, and time-based access with IAM Conditions.
These resources reference existing Cloud Run services with IAP enabled. The examples are intentionally small. Combine them with your own Cloud Run deployments and IAP configuration.
Grant a role to multiple members at once
When managing access to IAP-protected services, you often need to grant the same role to multiple users simultaneously.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const binding = new gcp.iap.WebCloudRunServiceIamBinding("binding", {
project: _default.project,
location: _default.location,
cloudRunServiceName: _default.name,
role: "roles/iap.httpsResourceAccessor",
members: ["user:jane@example.com"],
});
import pulumi
import pulumi_gcp as gcp
binding = gcp.iap.WebCloudRunServiceIamBinding("binding",
project=default["project"],
location=default["location"],
cloud_run_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.NewWebCloudRunServiceIamBinding(ctx, "binding", &iap.WebCloudRunServiceIamBindingArgs{
Project: pulumi.Any(_default.Project),
Location: pulumi.Any(_default.Location),
CloudRunServiceName: 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.WebCloudRunServiceIamBinding("binding", new()
{
Project = @default.Project,
Location = @default.Location,
CloudRunServiceName = @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.WebCloudRunServiceIamBinding;
import com.pulumi.gcp.iap.WebCloudRunServiceIamBindingArgs;
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 WebCloudRunServiceIamBinding("binding", WebCloudRunServiceIamBindingArgs.builder()
.project(default_.project())
.location(default_.location())
.cloudRunServiceName(default_.name())
.role("roles/iap.httpsResourceAccessor")
.members("user:jane@example.com")
.build());
}
}
resources:
binding:
type: gcp:iap:WebCloudRunServiceIamBinding
properties:
project: ${default.project}
location: ${default.location}
cloudRunServiceName: ${default.name}
role: roles/iap.httpsResourceAccessor
members:
- user:jane@example.com
The WebCloudRunServiceIamBinding resource is authoritative for a specific role. It grants roles/iap.httpsResourceAccessor to all listed members, replacing any previous members for that role. The cloudRunServiceName identifies which Cloud Run service to protect. Other roles on the same service remain unchanged.
Add a single member to an existing policy
When onboarding individual users, you want to grant access without affecting others who already have the role.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const member = new gcp.iap.WebCloudRunServiceIamMember("member", {
project: _default.project,
location: _default.location,
cloudRunServiceName: _default.name,
role: "roles/iap.httpsResourceAccessor",
member: "user:jane@example.com",
});
import pulumi
import pulumi_gcp as gcp
member = gcp.iap.WebCloudRunServiceIamMember("member",
project=default["project"],
location=default["location"],
cloud_run_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.NewWebCloudRunServiceIamMember(ctx, "member", &iap.WebCloudRunServiceIamMemberArgs{
Project: pulumi.Any(_default.Project),
Location: pulumi.Any(_default.Location),
CloudRunServiceName: 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.WebCloudRunServiceIamMember("member", new()
{
Project = @default.Project,
Location = @default.Location,
CloudRunServiceName = @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.WebCloudRunServiceIamMember;
import com.pulumi.gcp.iap.WebCloudRunServiceIamMemberArgs;
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 WebCloudRunServiceIamMember("member", WebCloudRunServiceIamMemberArgs.builder()
.project(default_.project())
.location(default_.location())
.cloudRunServiceName(default_.name())
.role("roles/iap.httpsResourceAccessor")
.member("user:jane@example.com")
.build());
}
}
resources:
member:
type: gcp:iap:WebCloudRunServiceIamMember
properties:
project: ${default.project}
location: ${default.location}
cloudRunServiceName: ${default.name}
role: roles/iap.httpsResourceAccessor
member: user:jane@example.com
The WebCloudRunServiceIamMember resource is non-authoritative. It adds one member to a role without replacing existing members. This approach works well for incremental access grants and can be combined with binding resources as long as they manage different roles.
Set time-based access with IAM Conditions
Temporary access grants, such as contractor access or time-limited testing, benefit from policies that expire automatically.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const binding = new gcp.iap.WebCloudRunServiceIamBinding("binding", {
project: _default.project,
location: _default.location,
cloudRunServiceName: _default.name,
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\")",
},
});
import pulumi
import pulumi_gcp as gcp
binding = gcp.iap.WebCloudRunServiceIamBinding("binding",
project=default["project"],
location=default["location"],
cloud_run_service_name=default["name"],
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\")",
})
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.NewWebCloudRunServiceIamBinding(ctx, "binding", &iap.WebCloudRunServiceIamBindingArgs{
Project: pulumi.Any(_default.Project),
Location: pulumi.Any(_default.Location),
CloudRunServiceName: pulumi.Any(_default.Name),
Role: pulumi.String("roles/iap.httpsResourceAccessor"),
Members: pulumi.StringArray{
pulumi.String("user:jane@example.com"),
},
Condition: &iap.WebCloudRunServiceIamBindingConditionArgs{
Title: pulumi.String("expires_after_2019_12_31"),
Description: pulumi.String("Expiring at midnight of 2019-12-31"),
Expression: pulumi.String("request.time < timestamp(\"2020-01-01T00:00:00Z\")"),
},
})
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.WebCloudRunServiceIamBinding("binding", new()
{
Project = @default.Project,
Location = @default.Location,
CloudRunServiceName = @default.Name,
Role = "roles/iap.httpsResourceAccessor",
Members = new[]
{
"user:jane@example.com",
},
Condition = new Gcp.Iap.Inputs.WebCloudRunServiceIamBindingConditionArgs
{
Title = "expires_after_2019_12_31",
Description = "Expiring at midnight of 2019-12-31",
Expression = "request.time < timestamp(\"2020-01-01T00:00:00Z\")",
},
});
});
package generated_program;
import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.iap.WebCloudRunServiceIamBinding;
import com.pulumi.gcp.iap.WebCloudRunServiceIamBindingArgs;
import com.pulumi.gcp.iap.inputs.WebCloudRunServiceIamBindingConditionArgs;
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 WebCloudRunServiceIamBinding("binding", WebCloudRunServiceIamBindingArgs.builder()
.project(default_.project())
.location(default_.location())
.cloudRunServiceName(default_.name())
.role("roles/iap.httpsResourceAccessor")
.members("user:jane@example.com")
.condition(WebCloudRunServiceIamBindingConditionArgs.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());
}
}
resources:
binding:
type: gcp:iap:WebCloudRunServiceIamBinding
properties:
project: ${default.project}
location: ${default.location}
cloudRunServiceName: ${default.name}
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")
IAM Conditions add temporal logic to role grants. The condition property defines when access is valid using CEL expressions. Here, request.time < timestamp("2020-01-01T00:00:00Z") grants access until midnight on December 31, 2019. The title and description document the condition’s purpose. Conditions work with both binding and member resources.
Beyond these examples
These snippets focus on specific IAM policy features: role-based access control (binding vs member) and IAM Conditions for time-based access. They’re intentionally minimal rather than full access control systems.
The examples reference pre-existing infrastructure such as Cloud Run services with IAP enabled, and GCP project and location configuration. They focus on configuring access policies rather than provisioning the underlying services.
To keep things focused, common IAM patterns are omitted, including:
- Full policy replacement (WebCloudRunServiceIamPolicy)
- Complex condition expressions (resource attributes, request context)
- Service account impersonation and delegation
- Audit logging configuration
These omissions are intentional: the goal is to illustrate how each IAM policy feature is wired, not provide drop-in access control modules. See the WebCloudRunServiceIamPolicy resource reference for all available configuration options.
Let's manage GCP Identity-Aware Proxy IAM Policies for Cloud Run
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Try Pulumi Cloud for FREEFrequently Asked Questions
Resource Selection & Conflicts
Can I use IamPolicy together with IamBinding or IamMember?
No,
gcp.iap.WebCloudRunServiceIamPolicy cannot be used with gcp.iap.WebCloudRunServiceIamBinding or gcp.iap.WebCloudRunServiceIamMember because they will conflict over policy control. Choose one approach: use IamPolicy for full authoritative control, or use IamBinding/IamMember for granular management.Can I use IamBinding and IamMember together?
Yes, but only if they manage different roles. Using
gcp.iap.WebCloudRunServiceIamBinding and gcp.iap.WebCloudRunServiceIamMember on the same role will cause conflicts.IAM Policy Configuration
What's the difference between IamPolicy, IamBinding, and IamMember?
IamPolicy is authoritative and replaces the entire IAM policy. IamBinding is authoritative for a specific role, preserving other roles in the policy. IamMember is non-authoritative, adding a single member to a role while preserving other members.How do I grant IAP access to my Cloud Run service?
Use
gcp.iap.WebCloudRunServiceIamBinding or gcp.iap.WebCloudRunServiceIamMember with role: "roles/iap.httpsResourceAccessor" and specify members like ["user:jane@example.com"].IAM Conditions
How do I add time-based expiration to IAM permissions?
Add a
condition block with title, description, and expression. For example, use expression: "request.time < timestamp(\"2020-01-01T00:00:00Z\")" to expire permissions at a specific date. Note that IAM Conditions have known limitations that may affect certain use cases.