Configure GCP Cloud Run Service IAM Policies

The gcp:cloudrunv2/serviceIamPolicy:ServiceIamPolicy resource, part of the Pulumi GCP provider, manages IAM access control for Cloud Run v2 services by defining who can invoke, manage, or view the service. This guide focuses on three capabilities: incremental member grants (ServiceIamMember), role-level member management (ServiceIamBinding), and complete policy replacement (ServiceIamPolicy).

These resources reference existing Cloud Run v2 services and require project and location identifiers. The examples are intentionally small. Combine them with your own service definitions and organizational access patterns.

Grant a role to a single member incrementally

When adding individual users or service accounts, you often want to preserve existing permissions while granting new access.

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

const member = new gcp.cloudrunv2.ServiceIamMember("member", {
    project: _default.project,
    location: _default.location,
    name: _default.name,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.cloudrunv2.ServiceIamMember("member",
    project=default["project"],
    location=default["location"],
    name=default["name"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/cloudrunv2"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := cloudrunv2.NewServiceIamMember(ctx, "member", &cloudrunv2.ServiceIamMemberArgs{
			Project:  pulumi.Any(_default.Project),
			Location: pulumi.Any(_default.Location),
			Name:     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.CloudRunV2.ServiceIamMember("member", new()
    {
        Project = @default.Project,
        Location = @default.Location,
        Name = @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.cloudrunv2.ServiceIamMember;
import com.pulumi.gcp.cloudrunv2.ServiceIamMemberArgs;
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 ServiceIamMember("member", ServiceIamMemberArgs.builder()
            .project(default_.project())
            .location(default_.location())
            .name(default_.name())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:cloudrunv2:ServiceIamMember
    properties:
      project: ${default.project}
      location: ${default.location}
      name: ${default.name}
      role: roles/viewer
      member: user:jane@example.com

ServiceIamMember adds one member to a role without affecting other members or roles. The member property uses IAM identity format (e.g., “user:jane@example.com”, “serviceAccount:sa@project.iam.gserviceaccount.com”). This is non-authoritative: other members for the same role remain unchanged.

Grant a role to multiple members authoritatively

When you need to define the complete list of members for a specific role, ServiceIamBinding replaces all existing members for that role while preserving other roles.

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

const binding = new gcp.cloudrunv2.ServiceIamBinding("binding", {
    project: _default.project,
    location: _default.location,
    name: _default.name,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.cloudrunv2.ServiceIamBinding("binding",
    project=default["project"],
    location=default["location"],
    name=default["name"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/cloudrunv2"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := cloudrunv2.NewServiceIamBinding(ctx, "binding", &cloudrunv2.ServiceIamBindingArgs{
			Project:  pulumi.Any(_default.Project),
			Location: pulumi.Any(_default.Location),
			Name:     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.CloudRunV2.ServiceIamBinding("binding", new()
    {
        Project = @default.Project,
        Location = @default.Location,
        Name = @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.cloudrunv2.ServiceIamBinding;
import com.pulumi.gcp.cloudrunv2.ServiceIamBindingArgs;
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 ServiceIamBinding("binding", ServiceIamBindingArgs.builder()
            .project(default_.project())
            .location(default_.location())
            .name(default_.name())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:cloudrunv2:ServiceIamBinding
    properties:
      project: ${default.project}
      location: ${default.location}
      name: ${default.name}
      role: roles/viewer
      members:
        - user:jane@example.com

ServiceIamBinding is authoritative for the specified role. The members array defines the complete list; any existing members not in this list are removed. Other roles on the service remain unchanged. This approach works well when you manage all access for a role in one place.

Replace the entire IAM policy for a service

When migrating services or enforcing strict access control, you may need to define the complete IAM policy from scratch.

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.cloudrunv2.ServiceIamPolicy("policy", {
    project: _default.project,
    location: _default.location,
    name: _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.cloudrunv2.ServiceIamPolicy("policy",
    project=default["project"],
    location=default["location"],
    name=default["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/cloudrunv2"
	"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 = cloudrunv2.NewServiceIamPolicy(ctx, "policy", &cloudrunv2.ServiceIamPolicyArgs{
			Project:    pulumi.Any(_default.Project),
			Location:   pulumi.Any(_default.Location),
			Name:       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.CloudRunV2.ServiceIamPolicy("policy", new()
    {
        Project = @default.Project,
        Location = @default.Location,
        Name = @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.cloudrunv2.ServiceIamPolicy;
import com.pulumi.gcp.cloudrunv2.ServiceIamPolicyArgs;
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 ServiceIamPolicy("policy", ServiceIamPolicyArgs.builder()
            .project(default_.project())
            .location(default_.location())
            .name(default_.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:cloudrunv2:ServiceIamPolicy
    properties:
      project: ${default.project}
      location: ${default.location}
      name: ${default.name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/viewer
            members:
              - user:jane@example.com

ServiceIamPolicy replaces the entire IAM policy. The policyData property accepts output from the gcp.organizations.getIAMPolicy data source, which defines all roles and members. This is the most comprehensive approach but cannot be used alongside ServiceIamBinding or ServiceIamMember, as they would conflict over policy ownership.

Beyond these examples

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

The examples reference pre-existing infrastructure such as Cloud Run v2 services and GCP projects with configured locations. They focus on IAM policy configuration rather than service provisioning.

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

Conditional IAM bindings (condition blocks)
Custom role definitions
Service account creation and management
Cross-project or organization-level policies

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 v2 Service IAM Policy resource reference for all available configuration options.

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Frequently Asked Questions

Resource Conflicts & Compatibility

Why are my IAM policies conflicting or fighting each other?

ServiceIamPolicy cannot be used together with ServiceIamBinding or ServiceIamMember because they compete to control the same IAM policy. Use only ServiceIamPolicy OR use ServiceIamBinding/ServiceIamMember, never mix them.

Can I use ServiceIamBinding and ServiceIamMember together?

Yes, but only if they don’t grant privileges to the same role. If both resources manage the same role, they will conflict.

Resource Selection & Use Cases

What's the difference between ServiceIamPolicy, ServiceIamBinding, and ServiceIamMember?

ServiceIamPolicy is authoritative and replaces the entire IAM policy. ServiceIamBinding is authoritative for a specific role but preserves other roles. ServiceIamMember is non-authoritative and preserves other members for the same role.

Which IAM resource should I use for my use case?

Use ServiceIamPolicy when you need full control over the entire policy. Use ServiceIamBinding to manage all members for a specific role. Use ServiceIamMember to add individual members without affecting existing members for that role.

Configuration & Setup

How do I generate the policy data for ServiceIamPolicy?

Use the gcp.organizations.getIAMPolicy data source to generate the policyData, as shown in the example where it retrieves policy data with bindings for roles and members.

What happens if I don't specify location or project?

Both location and project can be parsed from the parent resource identifier. If not provided there, location is taken from the provider configuration, and project defaults to the provider project.

Using a different cloud?

Explore security guides for other cloud providers:

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