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. This guide focuses on three capabilities: granting roles to multiple members, adding single members non-authoritatively, and time-based access with IAM Conditions.

IAM bindings reference existing certificate templates and grant access to user accounts, service accounts, or groups. The examples are intentionally small. Combine them with your own certificate templates and identity management.

Grant a role to multiple members at once

Teams managing certificate templates often need to assign 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. The members array lists all identities that should have the role; any existing members not in this list will be removed. The certificateTemplate property references the template by ID, and role specifies which permission to grant (here, roles/privateca.templateUser allows certificate issuance).

Add time-based access with IAM Conditions

Organizations with compliance requirements often grant temporary access that expires automatically.

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 temporal constraints to the binding. The expression uses CEL (Common Expression Language) to define when access is valid; here, access expires at midnight on 2020-01-01. The title and description provide human-readable context. IAM Conditions have some limitations documented in the GCP IAM Conditions overview.

Add a single member to an existing role

When onboarding new team members, you often need to grant access without affecting others who already have the role.

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 existing members. Use this when multiple teams manage access independently, or when you want to grant access incrementally. Note that CertificateTemplateIamBinding and CertificateTemplateIamMember can coexist only if they manage different roles.

Beyond these examples

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

The examples reference pre-existing infrastructure such as certificate templates and user accounts, service accounts, or groups. They focus on configuring IAM bindings rather than provisioning the underlying certificate infrastructure.

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

Full policy replacement (CertificateTemplateIamPolicy)
Complex condition expressions (beyond time-based)
Custom role definitions
Federated identity 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 CertificateTemplateIamBinding resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

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

CertificateTemplateIamPolicy is authoritative and replaces the entire IAM policy. CertificateTemplateIamBinding is authoritative for a specific role but preserves other roles. CertificateTemplateIamMember is non-authoritative and preserves other members for the same role.

Can I use IamPolicy with IamBinding or IamMember?

No, CertificateTemplateIamPolicy cannot be used with CertificateTemplateIamBinding or CertificateTemplateIamMember because they’ll conflict over the policy configuration.

Can I use IamBinding and IamMember together?

Yes, but only if they grant different roles. Using both for the same role causes conflicts.

Configuration & Identity Management

What member identity formats are supported?

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

How do I specify custom IAM roles?

Custom roles must use the format [projects|organizations]/{parent-name}/roles/{role-name}.

IAM Conditions & Advanced Features

How do I add time-based conditions to IAM bindings?

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

What are the limitations of IAM Conditions?

IAM Conditions have known limitations that may affect functionality. Review the GCP documentation on IAM Conditions limitations before using them.

Immutability & Lifecycle

What properties can't I change after creation?

The certificateTemplate, location, project, role, and condition properties are immutable and require resource replacement if changed.

Using a different cloud?

Explore security guides for other cloud providers:

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