Manage GCP Certificate Authority Pool IAM Policies

The gcp:certificateauthority/caPoolIamPolicy:CaPoolIamPolicy resource, part of the Pulumi GCP provider, manages IAM access control for Certificate Authority Service CA pools. This guide focuses on four capabilities: authoritative policy replacement (CaPoolIamPolicy), role-level member management (CaPoolIamBinding), individual member grants (CaPoolIamMember), and time-based access with IAM Conditions.

These resources reference existing CA pools by ID. CaPoolIamPolicy is authoritative and replaces the entire policy; it conflicts with CaPoolIamBinding and CaPoolIamMember. CaPoolIamBinding and CaPoolIamMember can coexist if they manage different roles. The examples are intentionally small. Combine them with your own CA pool infrastructure and access requirements.

Replace the entire IAM policy for a CA pool

When you need complete control over CA pool access, CaPoolIamPolicy replaces the entire IAM policy with your specified bindings. This is useful when migrating from manual configuration or establishing a known-good baseline.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/privateca.certificateManager",
        members: ["user:jane@example.com"],
    }],
});
const policy = new gcp.certificateauthority.CaPoolIamPolicy("policy", {
    caPool: _default.id,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/privateca.certificateManager",
    "members": ["user:jane@example.com"],
}])
policy = gcp.certificateauthority.CaPoolIamPolicy("policy",
    ca_pool=default["id"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/certificateauthority"
	"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/privateca.certificateManager",
					Members: []string{
						"user:jane@example.com",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = certificateauthority.NewCaPoolIamPolicy(ctx, "policy", &certificateauthority.CaPoolIamPolicyArgs{
			CaPool:     pulumi.Any(_default.Id),
			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/privateca.certificateManager",
                Members = new[]
                {
                    "user:jane@example.com",
                },
            },
        },
    });

    var policy = new Gcp.CertificateAuthority.CaPoolIamPolicy("policy", new()
    {
        CaPool = @default.Id,
        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.certificateauthority.CaPoolIamPolicy;
import com.pulumi.gcp.certificateauthority.CaPoolIamPolicyArgs;
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/privateca.certificateManager")
                .members("user:jane@example.com")
                .build())
            .build());

        var policy = new CaPoolIamPolicy("policy", CaPoolIamPolicyArgs.builder()
            .caPool(default_.id())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:certificateauthority:CaPoolIamPolicy
    properties:
      caPool: ${default.id}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/privateca.certificateManager
            members:
              - user:jane@example.com

The getIAMPolicy data source constructs the policy document with role-to-members mappings. The CaPoolIamPolicy resource applies this policy to the CA pool, removing any bindings not in the policy. The caPool property references the pool by ID; policyData contains the serialized policy.

Grant a role to multiple members at once

Teams often need to grant the same role to several users or service accounts. CaPoolIamBinding manages all members for a single role while preserving other roles.

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 role property specifies which permission set to grant; members lists the identities receiving access. CaPoolIamBinding is authoritative for this role: it replaces all members for the role but leaves other roles untouched. Use this when you want to manage a role’s membership as a single unit.

Add a single member to a role

When onboarding individual users or service accounts, CaPoolIamMember adds one member without affecting other members or roles. This is the safest option for incremental access grants.

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 member property specifies a single identity (user, service account, or group). CaPoolIamMember is non-authoritative: it adds this member to the role without removing existing members. Multiple CaPoolIamMember resources can target the same role without conflict.

Apply time-based access with IAM Conditions

Temporary access grants often require expiration dates. IAM Conditions attach time constraints or other logic to role bindings.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        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\")",
        },
    }],
});
const policy = new gcp.certificateauthority.CaPoolIamPolicy("policy", {
    caPool: _default.id,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "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\")",
    },
}])
policy = gcp.certificateauthority.CaPoolIamPolicy("policy",
    ca_pool=default["id"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/certificateauthority"
	"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/privateca.certificateManager",
					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 = certificateauthority.NewCaPoolIamPolicy(ctx, "policy", &certificateauthority.CaPoolIamPolicyArgs{
			CaPool:     pulumi.Any(_default.Id),
			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/privateca.certificateManager",
                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.CertificateAuthority.CaPoolIamPolicy("policy", new()
    {
        CaPool = @default.Id,
        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.certificateauthority.CaPoolIamPolicy;
import com.pulumi.gcp.certificateauthority.CaPoolIamPolicyArgs;
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/privateca.certificateManager")
                .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 CaPoolIamPolicy("policy", CaPoolIamPolicyArgs.builder()
            .caPool(default_.id())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:certificateauthority:CaPoolIamPolicy
    properties:
      caPool: ${default.id}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - 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")

The condition block adds a CEL expression that GCP evaluates on each access attempt. The title identifies the condition; expression defines the logic. Here, access expires at midnight on 2020-01-01. IAM Conditions work with all three resource types (Policy, Binding, Member) but have known limitations documented by GCP.

Beyond these examples

These snippets focus on specific IAM management features: authoritative vs non-authoritative IAM management, role binding and member assignment, 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 CA pools (via the caPool property) and GCP project and location context. They focus on IAM binding configuration rather than provisioning the underlying CA infrastructure.

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

  • Location and project specification (uses defaults from parent resource or provider)
  • Multiple conditions per binding
  • Service account and group member types (examples show only user:)
  • Conflict resolution between Policy, Binding, and Member resources

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 CaPoolIamPolicy resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts
Which IAM resource should I use for managing CA Pool permissions?

Choose based on your needs:

  • CaPoolIamPolicy: Authoritative, replaces the entire IAM policy
  • CaPoolIamBinding: Authoritative for a specific role, preserves other roles
  • CaPoolIamMember: Non-authoritative, adds individual members without affecting others
Can I use CaPoolIamPolicy with CaPoolIamBinding or CaPoolIamMember?
No, CaPoolIamPolicy cannot be used with CaPoolIamBinding or CaPoolIamMember as they will conflict over the policy.
Can I use CaPoolIamBinding and CaPoolIamMember together?
Yes, but only if they don’t grant privileges to the same role. Each role must be managed by only one resource type.
Configuration & Setup
How do I get the policy data for CaPoolIamPolicy?
Use the gcp.organizations.getIAMPolicy data source to generate policy data, then pass it to the policyData property.
Do I need to specify location and project?
Both location and project are required but can be automatically parsed from the parent resource identifier or taken from the provider configuration if not explicitly specified.
IAM Conditions
How do I add time-based or conditional IAM permissions?
Add a condition block with title, description, and expression fields. The expression uses CEL syntax, for example: request.time < timestamp("2020-01-01T00:00:00Z").
Are there limitations with IAM Conditions?
Yes, IAM Conditions are supported but have known limitations. Review the GCP documentation if you encounter issues with conditions.
Import & Custom Roles
How do I import a CA Pool IAM resource with a custom role?
Use the full role name including the project or organization prefix, for example: projects/my-project/roles/my-custom-role or organizations/my-org/roles/my-custom-role.

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