Manage GCP Certificate Authority Pool IAM Bindings

The gcp:certificateauthority/caPoolIamBinding:CaPoolIamBinding resource, part of the Pulumi GCP provider, manages IAM role bindings for Certificate Authority Service CA Pools, controlling who can manage certificates and pool configuration. This guide focuses on three capabilities: authoritative role binding for multiple members, time-based access with IAM Conditions, and non-authoritative member addition.

IAM bindings reference existing CA Pool resources and require a configured Google Cloud project. The examples are intentionally small. Combine them with your own CA Pool infrastructure and identity management strategy.

Grant a role to multiple members at once

Teams managing CA Pool access often need to grant the same role to multiple users or service accounts simultaneously, ensuring consistent permissions across a group.

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

const binding = new gcp.certificateauthority.CaPoolIamBinding("binding", {
    caPool: _default.id,
    role: "roles/privateca.certificateManager",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.certificateauthority.CaPoolIamBinding("binding",
    ca_pool=default["id"],
    role="roles/privateca.certificateManager",
    members=["user:jane@example.com"])

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := certificateauthority.NewCaPoolIamBinding(ctx, "binding", &certificateauthority.CaPoolIamBindingArgs{
			CaPool: pulumi.Any(_default.Id),
			Role:   pulumi.String("roles/privateca.certificateManager"),
			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.CertificateAuthority.CaPoolIamBinding("binding", new()
    {
        CaPool = @default.Id,
        Role = "roles/privateca.certificateManager",
        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.certificateauthority.CaPoolIamBinding;
import com.pulumi.gcp.certificateauthority.CaPoolIamBindingArgs;
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 CaPoolIamBinding("binding", CaPoolIamBindingArgs.builder()
            .caPool(default_.id())
            .role("roles/privateca.certificateManager")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:certificateauthority:CaPoolIamBinding
    properties:
      caPool: ${default.id}
      role: roles/privateca.certificateManager
      members:
        - user:jane@example.com

The CaPoolIamBinding resource is authoritative for the specified role: it replaces all existing members for that role with the list you provide. The members array accepts user accounts, service accounts, groups, and other identity types. The caPool property references the pool to which you’re granting access, and role specifies the permission level (here, roles/privateca.certificateManager allows certificate issuance and management).

Apply time-based access with IAM Conditions

Organizations with temporary contractors or time-limited projects can restrict access to CA Pools using IAM Conditions that automatically expire.

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

const binding = new gcp.certificateauthority.CaPoolIamBinding("binding", {
    caPool: _default.id,
    role: "roles/privateca.certificateManager",
    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.certificateauthority.CaPoolIamBinding("binding",
    ca_pool=default["id"],
    role="roles/privateca.certificateManager",
    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/certificateauthority"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := certificateauthority.NewCaPoolIamBinding(ctx, "binding", &certificateauthority.CaPoolIamBindingArgs{
			CaPool: pulumi.Any(_default.Id),
			Role:   pulumi.String("roles/privateca.certificateManager"),
			Members: pulumi.StringArray{
				pulumi.String("user:jane@example.com"),
			},
			Condition: &certificateauthority.CaPoolIamBindingConditionArgs{
				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.CertificateAuthority.CaPoolIamBinding("binding", new()
    {
        CaPool = @default.Id,
        Role = "roles/privateca.certificateManager",
        Members = new[]
        {
            "user:jane@example.com",
        },
        Condition = new Gcp.CertificateAuthority.Inputs.CaPoolIamBindingConditionArgs
        {
            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.certificateauthority.CaPoolIamBinding;
import com.pulumi.gcp.certificateauthority.CaPoolIamBindingArgs;
import com.pulumi.gcp.certificateauthority.inputs.CaPoolIamBindingConditionArgs;
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 CaPoolIamBinding("binding", CaPoolIamBindingArgs.builder()
            .caPool(default_.id())
            .role("roles/privateca.certificateManager")
            .members("user:jane@example.com")
            .condition(CaPoolIamBindingConditionArgs.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:certificateauthority:CaPoolIamBinding
    properties:
      caPool: ${default.id}
      role: roles/privateca.certificateManager
      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 or attribute-based restrictions to role bindings. The condition block requires a title for identification, an expression using Common Expression Language (CEL), and optionally a description. Here, the expression compares request.time against a timestamp, automatically revoking access after December 31, 2019. This extends the basic binding pattern with automatic expiration, eliminating manual access revocation.

Add a single member to an existing role

When onboarding individual users or service accounts, teams often need to grant access without affecting other members who already have the same role.

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

const member = new gcp.certificateauthority.CaPoolIamMember("member", {
    caPool: _default.id,
    role: "roles/privateca.certificateManager",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.certificateauthority.CaPoolIamMember("member",
    ca_pool=default["id"],
    role="roles/privateca.certificateManager",
    member="user:jane@example.com")

package main

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

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := certificateauthority.NewCaPoolIamMember(ctx, "member", &certificateauthority.CaPoolIamMemberArgs{
			CaPool: pulumi.Any(_default.Id),
			Role:   pulumi.String("roles/privateca.certificateManager"),
			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.CertificateAuthority.CaPoolIamMember("member", new()
    {
        CaPool = @default.Id,
        Role = "roles/privateca.certificateManager",
        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.certificateauthority.CaPoolIamMember;
import com.pulumi.gcp.certificateauthority.CaPoolIamMemberArgs;
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 CaPoolIamMember("member", CaPoolIamMemberArgs.builder()
            .caPool(default_.id())
            .role("roles/privateca.certificateManager")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:certificateauthority:CaPoolIamMember
    properties:
      caPool: ${default.id}
      role: roles/privateca.certificateManager
      member: user:jane@example.com

The CaPoolIamMember resource is non-authoritative: it adds one member to a role without replacing existing members. Use this when you want to grant access incrementally rather than managing the complete member list. The member property takes a single identity (here, a user email), while role and caPool work the same as in CaPoolIamBinding.

Beyond these examples

These snippets focus on specific IAM binding features: role-based access control (Binding vs Member) and time-based access with IAM Conditions. They’re intentionally minimal rather than full access management solutions.

The examples reference pre-existing infrastructure such as CA Pool resources and a Google Cloud project with Certificate Authority Service enabled. They focus on configuring IAM bindings rather than provisioning the underlying certificate infrastructure.

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

Policy-level IAM management (CaPoolIamPolicy)
Custom role definitions and formatting
Condition limitations and troubleshooting
Federated identity and workload identity pool configuration

These omissions are intentional: the goal is to illustrate how each IAM binding feature is wired, not provide drop-in access control modules. See the CaPoolIamBinding resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

Which IAM resource should I use for CA Pool permissions?

You have three options:

CaPoolIamPolicy - Authoritative. Replaces the entire IAM policy.
CaPoolIamBinding - Authoritative for a specific role. Preserves other roles.
CaPoolIamMember - Non-authoritative. Adds a single member to a role without affecting other members.

Can I use CaPoolIamPolicy with CaPoolIamBinding or CaPoolIamMember?

No, CaPoolIamPolicy cannot be used with CaPoolIamBinding or CaPoolIamMember as they will conflict over the policy. Choose one approach: use CaPoolIamPolicy alone for full control, or use CaPoolIamBinding/CaPoolIamMember for granular management.

Can I use CaPoolIamBinding and CaPoolIamMember together?

Yes, but only if they don’t grant privileges to the same role. Using both resources for the same role will cause conflicts.

Configuration & Properties

What properties are immutable after creation?

The caPool, role, location, project, and condition properties cannot be changed after creation. Only the members list can be updated.

How do I specify custom IAM roles?

Custom roles must use the format [projects|organizations]/{parent-name}/roles/{role-name}. For example, projects/my-project/roles/my-custom-role.

What member identity formats are supported?

Supported formats include allUsers, allAuthenticatedUsers, user:{email}, serviceAccount:{email}, group:{email}, domain:{domain}, projectOwner/Editor/Viewer:{projectid}, and federated identities like principal://iam.googleapis.com/....

Advanced Features

Can I use IAM Conditions with this resource?

Yes, IAM Conditions are supported via the condition property with title, description, and expression fields. However, IAM Conditions have known limitations that you should review before use.

Using a different cloud?

Explore security guides for other cloud providers:

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