Configure GCP Cloud Run IAM Policies

The gcp:cloudrun/iamPolicy:IamPolicy resource, part of the Pulumi GCP provider, manages IAM policies for Cloud Run services, controlling who can invoke or manage the service. This guide focuses on three capabilities: authoritative policy replacement (IamPolicy), role-level member management (IamBinding), and incremental member addition (IamMember).

These resources reference existing Cloud Run services by name, location, and project. IamPolicy cannot be used with IamBinding or IamMember on the same service; they conflict over policy ownership. IamBinding and IamMember can coexist if they manage different roles. The examples are intentionally small. Combine them with your own Cloud Run services and access requirements.

Replace the entire IAM policy for a service

When you need complete control over service 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.cloudrun.IamPolicy("policy", {
    location: _default.location,
    project: _default.project,
    service: _default.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.cloudrun.IamPolicy("policy",
    location=default["location"],
    project=default["project"],
    service=default["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/cloudrun"
	"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/viewer",
					Members: []string{
						"user:jane@example.com",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = cloudrun.NewIamPolicy(ctx, "policy", &cloudrun.IamPolicyArgs{
			Location:   pulumi.Any(_default.Location),
			Project:    pulumi.Any(_default.Project),
			Service:    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/viewer",
                Members = new[]
                {
                    "user:jane@example.com",
                },
            },
        },
    });

    var policy = new Gcp.CloudRun.IamPolicy("policy", new()
    {
        Location = @default.Location,
        Project = @default.Project,
        Service = @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.cloudrun.IamPolicy;
import com.pulumi.gcp.cloudrun.IamPolicyArgs;
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 IamPolicy("policy", IamPolicyArgs.builder()
            .location(default_.location())
            .project(default_.project())
            .service(default_.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:cloudrun:IamPolicy
    properties:
      location: ${default.location}
      project: ${default.project}
      service: ${default.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 accepts output from the getIAMPolicy data source, which defines bindings (role-to-members mappings). This resource is authoritative: it replaces the service’s entire IAM policy. Use this when you want to manage all permissions in one place, but be aware it overwrites any existing policy.

Grant a role to multiple members at once

Teams often grant the same role to several users or service accounts. IamBinding manages all members for a specific role while preserving other roles.

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

const binding = new gcp.cloudrun.IamBinding("binding", {
    location: _default.location,
    project: _default.project,
    service: _default.name,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.cloudrun.IamBinding("binding",
    location=default["location"],
    project=default["project"],
    service=default["name"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := cloudrun.NewIamBinding(ctx, "binding", &cloudrun.IamBindingArgs{
			Location: pulumi.Any(_default.Location),
			Project:  pulumi.Any(_default.Project),
			Service:  pulumi.Any(_default.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.CloudRun.IamBinding("binding", new()
    {
        Location = @default.Location,
        Project = @default.Project,
        Service = @default.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.cloudrun.IamBinding;
import com.pulumi.gcp.cloudrun.IamBindingArgs;
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 IamBinding("binding", IamBindingArgs.builder()
            .location(default_.location())
            .project(default_.project())
            .service(default_.name())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:cloudrun:IamBinding
    properties:
      location: ${default.location}
      project: ${default.project}
      service: ${default.name}
      role: roles/viewer
      members:
        - user:jane@example.com

The role property specifies which role to manage; the members array lists all identities that should have that role. This resource is authoritative for the specified role: it replaces all existing members for that role but leaves other roles unchanged. Use this when you want to control exactly who has a specific role.

Add a single member to a role incrementally

When you need to grant access to one user without affecting other permissions, IamMember adds a single member to a role.

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

const member = new gcp.cloudrun.IamMember("member", {
    location: _default.location,
    project: _default.project,
    service: _default.name,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.cloudrun.IamMember("member",
    location=default["location"],
    project=default["project"],
    service=default["name"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := cloudrun.NewIamMember(ctx, "member", &cloudrun.IamMemberArgs{
			Location: pulumi.Any(_default.Location),
			Project:  pulumi.Any(_default.Project),
			Service:  pulumi.Any(_default.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.CloudRun.IamMember("member", new()
    {
        Location = @default.Location,
        Project = @default.Project,
        Service = @default.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.cloudrun.IamMember;
import com.pulumi.gcp.cloudrun.IamMemberArgs;
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 IamMember("member", IamMemberArgs.builder()
            .location(default_.location())
            .project(default_.project())
            .service(default_.name())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:cloudrun:IamMember
    properties:
      location: ${default.location}
      project: ${default.project}
      service: ${default.name}
      role: roles/viewer
      member: user:jane@example.com

The member property specifies one identity to grant the role. This resource is non-authoritative: it adds the member without removing existing members for that role. Use this when you want to grant access incrementally, such as when different teams manage different users for the same role.

Beyond these examples

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

The examples reference pre-existing infrastructure such as Cloud Run services (by name, location, and project). They focus on IAM policy configuration rather than provisioning the services themselves.

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

Conditional IAM bindings (conditions)
Audit logging configuration (auditConfigs)
Service account impersonation
Public access (allUsers, allAuthenticatedUsers)

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 Cloud Run IamPolicy resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Compatibility

Why am I seeing IAM policy conflicts with my Cloud Run service?

gcp.cloudrun.IamPolicy cannot be used with gcp.cloudrun.IamBinding or gcp.cloudrun.IamMember because they will conflict over the policy state. Use IamPolicy alone for full control, or use IamBinding/IamMember without IamPolicy.

Can I use IamBinding and IamMember together?

Yes, but only if they manage different roles. gcp.cloudrun.IamBinding and gcp.cloudrun.IamMember will conflict if they grant privileges to the same role.

Which IAM resource should I use for my Cloud Run service?

Choose based on your needs:

IamPolicy - Authoritative control over the entire IAM policy (replaces existing policy)
IamBinding - Authoritative control over a specific role (preserves other roles)
IamMember - Non-authoritative addition of a single member (preserves other members for the role)

Configuration & Setup

How do I configure IamPolicy for a Cloud Run service?

Use the gcp.organizations.getIAMPolicy data source to generate policyData, then pass it to gcp.cloudrun.IamPolicy along with location, project, and service properties.

What properties are immutable after creating an IamPolicy?

The location, project, and service properties are immutable and cannot be changed after creation. Only policyData can be updated.

Using a different cloud?

Explore iam guides for other cloud providers:

AWS Guides Azure Guides