Manage GCP Compute Storage Pool IAM Policies

The gcp:compute/storagePoolIamPolicy:StoragePoolIamPolicy resource, part of the Pulumi GCP provider, manages IAM access control for Compute Engine storage pools through three resource types with different update behaviors. This guide focuses on four capabilities: authoritative policy replacement (StoragePoolIamPolicy), role-level member management (StoragePoolIamBinding), individual member grants (StoragePoolIamMember), and time-based IAM Conditions.

All three IAM resource types reference existing storage pools by project, zone, and name. StoragePoolIamPolicy cannot be used with StoragePoolIamBinding or StoragePoolIamMember (they conflict), but StoragePoolIamBinding and StoragePoolIamMember can coexist if they manage different roles. The examples are intentionally small. Combine them with your own storage pool infrastructure and access requirements.

Replace the entire IAM policy for a storage pool

When you need complete control over who can access a storage pool, StoragePoolIamPolicy replaces the entire IAM policy with your specified bindings.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/compute.viewer",
        members: ["user:jane@example.com"],
    }],
});
const policy = new gcp.compute.StoragePoolIamPolicy("policy", {
    project: test_storage_pool_basic.project,
    zone: test_storage_pool_basic.zone,
    name: test_storage_pool_basic.name,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/compute.viewer",
    "members": ["user:jane@example.com"],
}])
policy = gcp.compute.StoragePoolIamPolicy("policy",
    project=test_storage_pool_basic["project"],
    zone=test_storage_pool_basic["zone"],
    name=test_storage_pool_basic["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/compute"
	"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/compute.viewer",
					Members: []string{
						"user:jane@example.com",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = compute.NewStoragePoolIamPolicy(ctx, "policy", &compute.StoragePoolIamPolicyArgs{
			Project:    pulumi.Any(test_storage_pool_basic.Project),
			Zone:       pulumi.Any(test_storage_pool_basic.Zone),
			Name:       pulumi.Any(test_storage_pool_basic.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/compute.viewer",
                Members = new[]
                {
                    "user:jane@example.com",
                },
            },
        },
    });

    var policy = new Gcp.Compute.StoragePoolIamPolicy("policy", new()
    {
        Project = test_storage_pool_basic.Project,
        Zone = test_storage_pool_basic.Zone,
        Name = test_storage_pool_basic.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.compute.StoragePoolIamPolicy;
import com.pulumi.gcp.compute.StoragePoolIamPolicyArgs;
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/compute.viewer")
                .members("user:jane@example.com")
                .build())
            .build());

        var policy = new StoragePoolIamPolicy("policy", StoragePoolIamPolicyArgs.builder()
            .project(test_storage_pool_basic.project())
            .zone(test_storage_pool_basic.zone())
            .name(test_storage_pool_basic.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:compute:StoragePoolIamPolicy
    properties:
      project: ${["test-storage-pool-basic"].project}
      zone: ${["test-storage-pool-basic"].zone}
      name: ${["test-storage-pool-basic"].name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/compute.viewer
            members:
              - user:jane@example.com

The policyData property accepts output from the getIAMPolicy data source, which defines role-to-members mappings. StoragePoolIamPolicy is authoritative: it removes any existing bindings not specified in your policy. The project, zone, and name properties identify the storage pool to manage.

Grant a role to multiple members at once

Teams often need to grant the same role to several users or service accounts without affecting other roles.

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

const binding = new gcp.compute.StoragePoolIamBinding("binding", {
    project: test_storage_pool_basic.project,
    zone: test_storage_pool_basic.zone,
    name: test_storage_pool_basic.name,
    role: "roles/compute.viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.compute.StoragePoolIamBinding("binding",
    project=test_storage_pool_basic["project"],
    zone=test_storage_pool_basic["zone"],
    name=test_storage_pool_basic["name"],
    role="roles/compute.viewer",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := compute.NewStoragePoolIamBinding(ctx, "binding", &compute.StoragePoolIamBindingArgs{
			Project: pulumi.Any(test_storage_pool_basic.Project),
			Zone:    pulumi.Any(test_storage_pool_basic.Zone),
			Name:    pulumi.Any(test_storage_pool_basic.Name),
			Role:    pulumi.String("roles/compute.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.Compute.StoragePoolIamBinding("binding", new()
    {
        Project = test_storage_pool_basic.Project,
        Zone = test_storage_pool_basic.Zone,
        Name = test_storage_pool_basic.Name,
        Role = "roles/compute.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.compute.StoragePoolIamBinding;
import com.pulumi.gcp.compute.StoragePoolIamBindingArgs;
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 StoragePoolIamBinding("binding", StoragePoolIamBindingArgs.builder()
            .project(test_storage_pool_basic.project())
            .zone(test_storage_pool_basic.zone())
            .name(test_storage_pool_basic.name())
            .role("roles/compute.viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:compute:StoragePoolIamBinding
    properties:
      project: ${["test-storage-pool-basic"].project}
      zone: ${["test-storage-pool-basic"].zone}
      name: ${["test-storage-pool-basic"].name}
      role: roles/compute.viewer
      members:
        - user:jane@example.com

The members property lists all identities that should have the specified role. StoragePoolIamBinding is authoritative for its role: it replaces all members for that role but preserves other roles in the policy. This is useful when one team manages viewer access while another manages admin access.

Add a single member to a role incrementally

When you need to grant access to one user without affecting existing members, StoragePoolIamMember adds a single member to a role.

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

const member = new gcp.compute.StoragePoolIamMember("member", {
    project: test_storage_pool_basic.project,
    zone: test_storage_pool_basic.zone,
    name: test_storage_pool_basic.name,
    role: "roles/compute.viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.compute.StoragePoolIamMember("member",
    project=test_storage_pool_basic["project"],
    zone=test_storage_pool_basic["zone"],
    name=test_storage_pool_basic["name"],
    role="roles/compute.viewer",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := compute.NewStoragePoolIamMember(ctx, "member", &compute.StoragePoolIamMemberArgs{
			Project: pulumi.Any(test_storage_pool_basic.Project),
			Zone:    pulumi.Any(test_storage_pool_basic.Zone),
			Name:    pulumi.Any(test_storage_pool_basic.Name),
			Role:    pulumi.String("roles/compute.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.Compute.StoragePoolIamMember("member", new()
    {
        Project = test_storage_pool_basic.Project,
        Zone = test_storage_pool_basic.Zone,
        Name = test_storage_pool_basic.Name,
        Role = "roles/compute.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.compute.StoragePoolIamMember;
import com.pulumi.gcp.compute.StoragePoolIamMemberArgs;
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 StoragePoolIamMember("member", StoragePoolIamMemberArgs.builder()
            .project(test_storage_pool_basic.project())
            .zone(test_storage_pool_basic.zone())
            .name(test_storage_pool_basic.name())
            .role("roles/compute.viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:compute:StoragePoolIamMember
    properties:
      project: ${["test-storage-pool-basic"].project}
      zone: ${["test-storage-pool-basic"].zone}
      name: ${["test-storage-pool-basic"].name}
      role: roles/compute.viewer
      member: user:jane@example.com

The member property specifies one identity to grant the role. StoragePoolIamMember is non-authoritative: it adds the member without removing others. This is the safest option when multiple teams manage access to the same storage pool, since each team can manage their own members independently.

Apply time-based access with IAM Conditions

IAM Conditions let you grant temporary access or restrict permissions based on request attributes.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/compute.viewer",
        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.compute.StoragePoolIamPolicy("policy", {
    project: test_storage_pool_basic.project,
    zone: test_storage_pool_basic.zone,
    name: test_storage_pool_basic.name,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/compute.viewer",
    "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.compute.StoragePoolIamPolicy("policy",
    project=test_storage_pool_basic["project"],
    zone=test_storage_pool_basic["zone"],
    name=test_storage_pool_basic["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/compute"
	"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/compute.viewer",
					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 = compute.NewStoragePoolIamPolicy(ctx, "policy", &compute.StoragePoolIamPolicyArgs{
			Project:    pulumi.Any(test_storage_pool_basic.Project),
			Zone:       pulumi.Any(test_storage_pool_basic.Zone),
			Name:       pulumi.Any(test_storage_pool_basic.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/compute.viewer",
                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.Compute.StoragePoolIamPolicy("policy", new()
    {
        Project = test_storage_pool_basic.Project,
        Zone = test_storage_pool_basic.Zone,
        Name = test_storage_pool_basic.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.compute.StoragePoolIamPolicy;
import com.pulumi.gcp.compute.StoragePoolIamPolicyArgs;
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/compute.viewer")
                .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 StoragePoolIamPolicy("policy", StoragePoolIamPolicyArgs.builder()
            .project(test_storage_pool_basic.project())
            .zone(test_storage_pool_basic.zone())
            .name(test_storage_pool_basic.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:compute:StoragePoolIamPolicy
    properties:
      project: ${["test-storage-pool-basic"].project}
      zone: ${["test-storage-pool-basic"].zone}
      name: ${["test-storage-pool-basic"].name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/compute.viewer
            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 constraints to any of the three IAM resource types. The expression property uses Common Expression Language (CEL) to define when the binding applies. Here, the timestamp function creates an expiration date. The title and description properties document the condition’s purpose. IAM Conditions have known limitations; review the GCP documentation before using them in production.

Beyond these examples

These snippets focus on specific IAM management features: authoritative vs non-authoritative IAM management, role-based and member-based access control, and time-based IAM Conditions. They’re intentionally minimal rather than full access control configurations.

The examples reference pre-existing infrastructure such as storage pools (identified by project, zone, and name). They focus on configuring IAM bindings rather than provisioning storage pools themselves.

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

IAM policy data source for reading existing policies
Combining Binding and Member resources for different roles
Complex IAM Condition expressions (attribute-based, resource-based)
Import syntax for existing IAM configurations

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 StoragePoolIamPolicy resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

What's the difference between StoragePoolIamPolicy, StoragePoolIamBinding, and StoragePoolIamMember?

StoragePoolIamPolicy is authoritative and replaces the entire IAM policy. StoragePoolIamBinding is authoritative for a specific role, preserving other roles. StoragePoolIamMember is non-authoritative, adding a single member while preserving other members for that role.

Can I use StoragePoolIamPolicy with StoragePoolIamBinding or StoragePoolIamMember?

No, StoragePoolIamPolicy cannot be used with StoragePoolIamBinding or StoragePoolIamMember because they will conflict over the policy. Choose one approach: use Policy for full control, or use Binding/Member for incremental changes.

Can I use StoragePoolIamBinding and StoragePoolIamMember together?

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

IAM Conditions

How do I add time-based or conditional IAM permissions?

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

Are there limitations with IAM Conditions?

Yes, IAM Conditions have known limitations. Review the Google Cloud documentation if you encounter issues.

Configuration & Properties

What properties can't be changed after creating a StoragePoolIamPolicy?

The name, project, and zone properties are immutable and cannot be changed after creation.

Using a different cloud?

Explore security guides for other cloud providers:

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