Manage GCP Certificate Authority IAM Bindings

The gcp:certificateauthority/certificateTemplateIamBinding:CertificateTemplateIamBinding resource, part of the Pulumi GCP provider, manages IAM role bindings for Certificate Authority Service certificate templates, controlling which identities can use templates to issue certificates. This guide focuses on three capabilities: binding roles to multiple members, adding individual members to roles, and time-based conditional access.

IAM bindings reference existing certificate templates and IAM principals. The examples are intentionally small. Combine them with your own certificate templates and identity management strategy.

Grant a role to multiple members at once

Teams managing certificate templates often need to grant the same role to multiple users or service accounts simultaneously.

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

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

import pulumi
import pulumi_gcp as gcp

binding = gcp.certificateauthority.CertificateTemplateIamBinding("binding",
    certificate_template=default["id"],
    role="roles/privateca.templateUser",
    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.NewCertificateTemplateIamBinding(ctx, "binding", &certificateauthority.CertificateTemplateIamBindingArgs{
			CertificateTemplate: pulumi.Any(_default.Id),
			Role:                pulumi.String("roles/privateca.templateUser"),
			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.CertificateTemplateIamBinding("binding", new()
    {
        CertificateTemplate = @default.Id,
        Role = "roles/privateca.templateUser",
        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.CertificateTemplateIamBinding;
import com.pulumi.gcp.certificateauthority.CertificateTemplateIamBindingArgs;
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 CertificateTemplateIamBinding("binding", CertificateTemplateIamBindingArgs.builder()
            .certificateTemplate(default_.id())
            .role("roles/privateca.templateUser")
            .members("user:jane@example.com")
            .build());

    }
}

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

The CertificateTemplateIamBinding resource is authoritative for the specified role: it replaces all members for that role on the template. The members array accepts user accounts, service accounts, groups, and other identity formats. Other roles on the same template remain unchanged.

Add a single member to an existing role

When onboarding individual users or service accounts, you can add them one at a time without affecting existing grants.

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

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

import pulumi
import pulumi_gcp as gcp

member = gcp.certificateauthority.CertificateTemplateIamMember("member",
    certificate_template=default["id"],
    role="roles/privateca.templateUser",
    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.NewCertificateTemplateIamMember(ctx, "member", &certificateauthority.CertificateTemplateIamMemberArgs{
			CertificateTemplate: pulumi.Any(_default.Id),
			Role:                pulumi.String("roles/privateca.templateUser"),
			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.CertificateTemplateIamMember("member", new()
    {
        CertificateTemplate = @default.Id,
        Role = "roles/privateca.templateUser",
        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.CertificateTemplateIamMember;
import com.pulumi.gcp.certificateauthority.CertificateTemplateIamMemberArgs;
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 CertificateTemplateIamMember("member", CertificateTemplateIamMemberArgs.builder()
            .certificateTemplate(default_.id())
            .role("roles/privateca.templateUser")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:certificateauthority:CertificateTemplateIamMember
    properties:
      certificateTemplate: ${default.id}
      role: roles/privateca.templateUser
      member: user:jane@example.com

The CertificateTemplateIamMember resource is non-authoritative: it adds one member to a role without removing others. Use this when you need incremental access grants. The member property accepts a single identity in the same formats as the members array.

Add time-based access with IAM Conditions

Organizations with temporary contractors or time-limited projects use IAM Conditions to automatically revoke access after a specific date.

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

const binding = new gcp.certificateauthority.CertificateTemplateIamBinding("binding", {
    certificateTemplate: _default.id,
    role: "roles/privateca.templateUser",
    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.CertificateTemplateIamBinding("binding",
    certificate_template=default["id"],
    role="roles/privateca.templateUser",
    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.NewCertificateTemplateIamBinding(ctx, "binding", &certificateauthority.CertificateTemplateIamBindingArgs{
			CertificateTemplate: pulumi.Any(_default.Id),
			Role:                pulumi.String("roles/privateca.templateUser"),
			Members: pulumi.StringArray{
				pulumi.String("user:jane@example.com"),
			},
			Condition: &certificateauthority.CertificateTemplateIamBindingConditionArgs{
				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.CertificateTemplateIamBinding("binding", new()
    {
        CertificateTemplate = @default.Id,
        Role = "roles/privateca.templateUser",
        Members = new[]
        {
            "user:jane@example.com",
        },
        Condition = new Gcp.CertificateAuthority.Inputs.CertificateTemplateIamBindingConditionArgs
        {
            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.CertificateTemplateIamBinding;
import com.pulumi.gcp.certificateauthority.CertificateTemplateIamBindingArgs;
import com.pulumi.gcp.certificateauthority.inputs.CertificateTemplateIamBindingConditionArgs;
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 CertificateTemplateIamBinding("binding", CertificateTemplateIamBindingArgs.builder()
            .certificateTemplate(default_.id())
            .role("roles/privateca.templateUser")
            .members("user:jane@example.com")
            .condition(CertificateTemplateIamBindingConditionArgs.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:CertificateTemplateIamBinding
    properties:
      certificateTemplate: ${default.id}
      role: roles/privateca.templateUser
      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 the role binding. The expression property uses Common Expression Language (CEL) to define when access is valid. Here, the timestamp function sets an expiration date. The title and description properties document the condition’s purpose.

Beyond these examples

These snippets focus on specific IAM binding features: role binding for multiple members, single-member grants, and time-based conditional access. They’re intentionally minimal rather than full access control policies.

The examples reference pre-existing infrastructure such as certificate templates and IAM principals (users, service accounts, groups). They focus on configuring access rather than provisioning templates or identities.

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

Full IAM policy replacement (CertificateTemplateIamPolicy)
Complex IAM Condition expressions beyond time-based
Custom role definitions
Federated identity configuration

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

Let's manage GCP Certificate Authority IAM Bindings

Get started with Pulumi Cloud, then follow our quick setup guide to deploy this infrastructure.

Try Pulumi Cloud for FREE

Frequently Asked Questions

Resource Selection & Conflicts

Why am I getting conflicts between my IAM resources?

CertificateTemplateIamPolicy cannot be used with CertificateTemplateIamBinding or CertificateTemplateIamMember as they will fight over policy control. Choose one approach: use IamPolicy alone 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, not both.

What's the difference between IamPolicy, IamBinding, and IamMember?

Three management approaches with different scopes:

IamPolicy - Authoritative for entire policy (replaces all existing bindings)
IamBinding - Authoritative for a specific role (preserves other roles)
IamMember - Non-authoritative (adds single member, preserves other members for the role)

IAM Configuration

What format do I need for custom roles?

Custom roles must use the format [projects|organizations]/{parent-name}/roles/{role-name} (e.g., projects/my-project/roles/customTemplateUser).

What member identity formats are supported?

Supported formats include user:{email}, serviceAccount:{email}, group:{email}, domain:{domain}, allUsers, allAuthenticatedUsers, projectOwner:projectid, projectEditor:projectid, projectViewer:projectid, and federated identities using principal identifiers.

IAM Conditions

How do I add time-based or conditional access?

Configure the condition property with title, description, and expression. For example, to expire access: expression: "request.time < timestamp(\"2020-01-01T00:00:00Z\")".

What are the limitations of IAM Conditions?

IAM Conditions are supported but have known limitations. Review the GCP documentation on IAM Conditions limitations if you encounter issues.

Immutability & Lifecycle

What properties can't I change after creation?

The following properties are immutable: certificateTemplate, location, project, role, and condition. Changing these requires recreating the resource.

Using a different cloud?

Explore security guides for other cloud providers:

AWS Guides Azure Guides