The gcp:iam/workloadIdentityPoolIamPolicy:WorkloadIdentityPoolIamPolicy resource, part of the Pulumi GCP provider, manages IAM policies for Workload Identity Pools, controlling which identities can access the pool. This guide focuses on four capabilities: authoritative policy replacement, role-based bindings, non-authoritative member grants, and time-based access conditions.
These IAM resources reference existing Workload Identity Pools and require the pool ID. The examples are intentionally small. Combine them with your own pool infrastructure and identity management strategy.
Replace the entire IAM policy with a new definition
When you need complete control over pool access, you can replace the entire IAM policy in one operation, removing any existing bindings not included in your new policy.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const admin = gcp.organizations.getIAMPolicy({
bindings: [{
role: "roles/iam.workloadIdentityPoolViewer",
members: ["user:jane@example.com"],
}],
});
const policy = new gcp.iam.WorkloadIdentityPoolIamPolicy("policy", {
project: example.project,
workloadIdentityPoolId: example.workloadIdentityPoolId,
policyData: admin.then(admin => admin.policyData),
});
import pulumi
import pulumi_gcp as gcp
admin = gcp.organizations.get_iam_policy(bindings=[{
"role": "roles/iam.workloadIdentityPoolViewer",
"members": ["user:jane@example.com"],
}])
policy = gcp.iam.WorkloadIdentityPoolIamPolicy("policy",
project=example["project"],
workload_identity_pool_id=example["workloadIdentityPoolId"],
policy_data=admin.policy_data)
package main
import (
"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/iam"
"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/iam.workloadIdentityPoolViewer",
Members: []string{
"user:jane@example.com",
},
},
},
}, nil)
if err != nil {
return err
}
_, err = iam.NewWorkloadIdentityPoolIamPolicy(ctx, "policy", &iam.WorkloadIdentityPoolIamPolicyArgs{
Project: pulumi.Any(example.Project),
WorkloadIdentityPoolId: pulumi.Any(example.WorkloadIdentityPoolId),
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/iam.workloadIdentityPoolViewer",
Members = new[]
{
"user:jane@example.com",
},
},
},
});
var policy = new Gcp.Iam.WorkloadIdentityPoolIamPolicy("policy", new()
{
Project = example.Project,
WorkloadIdentityPoolId = example.WorkloadIdentityPoolId,
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.iam.WorkloadIdentityPoolIamPolicy;
import com.pulumi.gcp.iam.WorkloadIdentityPoolIamPolicyArgs;
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/iam.workloadIdentityPoolViewer")
.members("user:jane@example.com")
.build())
.build());
var policy = new WorkloadIdentityPoolIamPolicy("policy", WorkloadIdentityPoolIamPolicyArgs.builder()
.project(example.project())
.workloadIdentityPoolId(example.workloadIdentityPoolId())
.policyData(admin.policyData())
.build());
}
}
resources:
policy:
type: gcp:iam:WorkloadIdentityPoolIamPolicy
properties:
project: ${example.project}
workloadIdentityPoolId: ${example.workloadIdentityPoolId}
policyData: ${admin.policyData}
variables:
admin:
fn::invoke:
function: gcp:organizations:getIAMPolicy
arguments:
bindings:
- role: roles/iam.workloadIdentityPoolViewer
members:
- user:jane@example.com
The WorkloadIdentityPoolIamPolicy resource is authoritative: it replaces the complete policy. The policyData comes from getIAMPolicy, which constructs the policy document from bindings. The workloadIdentityPoolId identifies which pool to update. This approach gives you full control but requires managing all bindings together.
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 in the policy.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const binding = new gcp.iam.WorkloadIdentityPoolIamBinding("binding", {
project: example.project,
workloadIdentityPoolId: example.workloadIdentityPoolId,
role: "roles/iam.workloadIdentityPoolViewer",
members: ["user:jane@example.com"],
});
import pulumi
import pulumi_gcp as gcp
binding = gcp.iam.WorkloadIdentityPoolIamBinding("binding",
project=example["project"],
workload_identity_pool_id=example["workloadIdentityPoolId"],
role="roles/iam.workloadIdentityPoolViewer",
members=["user:jane@example.com"])
package main
import (
"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/iam"
"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)
func main() {
pulumi.Run(func(ctx *pulumi.Context) error {
_, err := iam.NewWorkloadIdentityPoolIamBinding(ctx, "binding", &iam.WorkloadIdentityPoolIamBindingArgs{
Project: pulumi.Any(example.Project),
WorkloadIdentityPoolId: pulumi.Any(example.WorkloadIdentityPoolId),
Role: pulumi.String("roles/iam.workloadIdentityPoolViewer"),
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.Iam.WorkloadIdentityPoolIamBinding("binding", new()
{
Project = example.Project,
WorkloadIdentityPoolId = example.WorkloadIdentityPoolId,
Role = "roles/iam.workloadIdentityPoolViewer",
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.iam.WorkloadIdentityPoolIamBinding;
import com.pulumi.gcp.iam.WorkloadIdentityPoolIamBindingArgs;
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 WorkloadIdentityPoolIamBinding("binding", WorkloadIdentityPoolIamBindingArgs.builder()
.project(example.project())
.workloadIdentityPoolId(example.workloadIdentityPoolId())
.role("roles/iam.workloadIdentityPoolViewer")
.members("user:jane@example.com")
.build());
}
}
resources:
binding:
type: gcp:iam:WorkloadIdentityPoolIamBinding
properties:
project: ${example.project}
workloadIdentityPoolId: ${example.workloadIdentityPoolId}
role: roles/iam.workloadIdentityPoolViewer
members:
- user:jane@example.com
The WorkloadIdentityPoolIamBinding resource is authoritative for a single role: it sets the complete member list for that role while preserving other roles. The members array lists all identities that should have this role. If you later remove a member from this list, they lose access.
Add a single member to a role non-authoritatively
When you want to grant access to one additional user without managing the complete member list, member resources provide non-authoritative updates.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const member = new gcp.iam.WorkloadIdentityPoolIamMember("member", {
project: example.project,
workloadIdentityPoolId: example.workloadIdentityPoolId,
role: "roles/iam.workloadIdentityPoolViewer",
member: "user:jane@example.com",
});
import pulumi
import pulumi_gcp as gcp
member = gcp.iam.WorkloadIdentityPoolIamMember("member",
project=example["project"],
workload_identity_pool_id=example["workloadIdentityPoolId"],
role="roles/iam.workloadIdentityPoolViewer",
member="user:jane@example.com")
package main
import (
"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/iam"
"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)
func main() {
pulumi.Run(func(ctx *pulumi.Context) error {
_, err := iam.NewWorkloadIdentityPoolIamMember(ctx, "member", &iam.WorkloadIdentityPoolIamMemberArgs{
Project: pulumi.Any(example.Project),
WorkloadIdentityPoolId: pulumi.Any(example.WorkloadIdentityPoolId),
Role: pulumi.String("roles/iam.workloadIdentityPoolViewer"),
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.Iam.WorkloadIdentityPoolIamMember("member", new()
{
Project = example.Project,
WorkloadIdentityPoolId = example.WorkloadIdentityPoolId,
Role = "roles/iam.workloadIdentityPoolViewer",
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.iam.WorkloadIdentityPoolIamMember;
import com.pulumi.gcp.iam.WorkloadIdentityPoolIamMemberArgs;
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 WorkloadIdentityPoolIamMember("member", WorkloadIdentityPoolIamMemberArgs.builder()
.project(example.project())
.workloadIdentityPoolId(example.workloadIdentityPoolId())
.role("roles/iam.workloadIdentityPoolViewer")
.member("user:jane@example.com")
.build());
}
}
resources:
member:
type: gcp:iam:WorkloadIdentityPoolIamMember
properties:
project: ${example.project}
workloadIdentityPoolId: ${example.workloadIdentityPoolId}
role: roles/iam.workloadIdentityPoolViewer
member: user:jane@example.com
The WorkloadIdentityPoolIamMember resource adds one member to a role without affecting other members. Multiple member resources can target the same role, and they won’t conflict. This is useful when different teams manage access for different users.
Apply time-based access with IAM Conditions
Access requirements sometimes include temporal constraints, such as permissions that expire after a specific date.
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
const admin = gcp.organizations.getIAMPolicy({
bindings: [{
role: "roles/iam.workloadIdentityPoolViewer",
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.iam.WorkloadIdentityPoolIamPolicy("policy", {
project: example.project,
workloadIdentityPoolId: example.workloadIdentityPoolId,
policyData: admin.then(admin => admin.policyData),
});
import pulumi
import pulumi_gcp as gcp
admin = gcp.organizations.get_iam_policy(bindings=[{
"role": "roles/iam.workloadIdentityPoolViewer",
"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.iam.WorkloadIdentityPoolIamPolicy("policy",
project=example["project"],
workload_identity_pool_id=example["workloadIdentityPoolId"],
policy_data=admin.policy_data)
package main
import (
"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/iam"
"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/iam.workloadIdentityPoolViewer",
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 = iam.NewWorkloadIdentityPoolIamPolicy(ctx, "policy", &iam.WorkloadIdentityPoolIamPolicyArgs{
Project: pulumi.Any(example.Project),
WorkloadIdentityPoolId: pulumi.Any(example.WorkloadIdentityPoolId),
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/iam.workloadIdentityPoolViewer",
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.Iam.WorkloadIdentityPoolIamPolicy("policy", new()
{
Project = example.Project,
WorkloadIdentityPoolId = example.WorkloadIdentityPoolId,
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.iam.WorkloadIdentityPoolIamPolicy;
import com.pulumi.gcp.iam.WorkloadIdentityPoolIamPolicyArgs;
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/iam.workloadIdentityPoolViewer")
.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 WorkloadIdentityPoolIamPolicy("policy", WorkloadIdentityPoolIamPolicyArgs.builder()
.project(example.project())
.workloadIdentityPoolId(example.workloadIdentityPoolId())
.policyData(admin.policyData())
.build());
}
}
resources:
policy:
type: gcp:iam:WorkloadIdentityPoolIamPolicy
properties:
project: ${example.project}
workloadIdentityPoolId: ${example.workloadIdentityPoolId}
policyData: ${admin.policyData}
variables:
admin:
fn::invoke:
function: gcp:organizations:getIAMPolicy
arguments:
bindings:
- role: roles/iam.workloadIdentityPoolViewer
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 constraints to any policy, binding, or member resource. The condition block requires a title, expression, and optional description. The expression uses CEL (Common Expression Language) to evaluate request context. Here, the timestamp function creates a deadline, and the policy grants access only before that time.
Beyond these examples
These snippets focus on specific IAM management features: authoritative vs non-authoritative IAM management, role-based access control, and time-based access with IAM Conditions. They’re intentionally minimal rather than full identity federation solutions.
The examples reference pre-existing infrastructure such as Workload Identity Pools and GCP projects. They focus on configuring IAM policies rather than provisioning the pools themselves.
To keep things focused, common IAM patterns are omitted, including:
- Attribute-based conditions (beyond time constraints)
- Custom role definitions
- Service account impersonation setup
- Cross-project or cross-organization access
These omissions are intentional: the goal is to illustrate how each IAM resource type is wired, not provide drop-in identity modules. See the Workload Identity Pool IAM Policy resource reference for all available configuration options.
Let's configure GCP Workload Identity Pool IAM Policies
Get started with Pulumi Cloud, then follow our quick setup guide to deploy this infrastructure.
Try Pulumi Cloud for FREEFrequently Asked Questions
Resource Selection & Conflicts
What's the difference between IamPolicy, IamBinding, and IamMember resources?
WorkloadIdentityPoolIamPolicy is authoritative and replaces the entire IAM policy. WorkloadIdentityPoolIamBinding is authoritative for a specific role, preserving other roles. WorkloadIdentityPoolIamMember is non-authoritative, adding a single member while preserving other members for that role.Why am I seeing IAM policy conflicts between my resources?
WorkloadIdentityPoolIamPolicy cannot be used with WorkloadIdentityPoolIamBinding or WorkloadIdentityPoolIamMember because they compete to control the policy. Choose one approach: use IamPolicy for full control, or use IamBinding/IamMember for granular management.Can I use IamBinding and IamMember resources together?
Yes, but only if they don’t grant privileges to the same role. Each role must be managed by either
IamBinding or IamMember resources, not both.IAM Conditions
How do I add time-based conditions to IAM policies?
Use the
condition property with title, description, and expression fields. For example, to expire access at midnight on 2020-01-01, set expression to request.time < timestamp("2020-01-01T00:00:00Z").What are the limitations of IAM Conditions?
IAM Conditions are supported but have known limitations. If you experience issues with conditions, review the GCP documentation on IAM Conditions limitations.
Configuration & Properties
What properties can't be changed after creating the resource?
Both
project and workloadIdentityPoolId are immutable and cannot be changed after resource creation.