Manage GCP Certificate Authority Pool IAM Policies

The gcp:certificateauthority/caPoolIamPolicy:CaPoolIamPolicy resource, part of the Pulumi GCP provider, controls IAM access to Certificate Authority Service CA pools through three resource types with different authoritativeness guarantees. 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 and have strict compatibility rules: CaPoolIamPolicy replaces the entire policy and conflicts with both CaPoolIamBinding and CaPoolIamMember. CaPoolIamBinding and CaPoolIamMember can coexist only when managing different roles. The examples are intentionally small. Choose the resource type that matches your access control model.

Grant a role to multiple members with CaPoolIamBinding

Teams managing CA pools often need to grant the same role to multiple users or service accounts. CaPoolIamBinding manages all members for a specific role authoritatively.

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 members array lists all identities that should have this role. CaPoolIamBinding replaces any existing members for this role while preserving other roles on the CA pool. If another process grants the same role to different members, CaPoolIamBinding will remove them on the next update.

Add time-based conditions to role bindings

Access policies sometimes need temporal constraints, such as permissions that expire after a specific date.

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")

The condition block adds an IAM Condition to the role binding. The expression uses CEL (Common Expression Language) to define when the binding applies. Here, the binding expires at midnight on 2020-01-01. IAM Conditions have known limitations; review the GCP documentation if you encounter issues.

Add individual members with CaPoolIamMember

When multiple teams manage access to the same CA pool, non-authoritative member resources let each team add their own users without overwriting others’ changes.

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

CaPoolIamMember grants a role to a single member without affecting other members for that role. Multiple CaPoolIamMember resources can grant the same role to different members, and they won’t conflict. This is useful when different teams need to manage their own access grants independently.

Replace the entire IAM policy with CaPoolIamPolicy

Organizations with centralized access control sometimes need to define the complete IAM policy for a CA pool in one place.

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

CaPoolIamPolicy sets the entire IAM policy, replacing any existing policy. The policyData comes from the getIAMPolicy data source, which constructs a policy document from bindings. This resource is authoritative: it removes any roles or members not defined in the policy. CaPoolIamPolicy cannot be used alongside CaPoolIamBinding or CaPoolIamMember, as they will conflict over the policy state.

Beyond these examples

These snippets focus on specific IAM resource features: authoritative vs non-authoritative access control and IAM Conditions for temporal constraints. They’re intentionally minimal rather than complete access control configurations.

The examples reference pre-existing infrastructure such as CA pools (by ID). They focus on configuring IAM access rather than provisioning the CA pools themselves.

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

Multiple role bindings in a single resource
Service account and group member types
Complex IAM Condition expressions (resource attributes, request context)
Policy retrieval with getIAMPolicy data source

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 to manage CA Pool permissions?

Choose based on your needs: CaPoolIamPolicy for full policy control (replaces entire policy), CaPoolIamBinding for managing all members of a specific role (preserves other roles), or CaPoolIamMember for adding individual members without affecting others.

Can I mix CaPoolIamPolicy with other IAM resources?

No, CaPoolIamPolicy cannot be used with CaPoolIamBinding or CaPoolIamMember as they will conflict over policy management.

Can I use CaPoolIamBinding and CaPoolIamMember together?

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

IAM Conditions

How do I add time-based or conditional access restrictions?

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

What are the limitations of IAM Conditions?

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

Configuration & Properties

What properties can't be changed after creation?

The caPool, location, and project properties are immutable and cannot be modified after resource creation.

Where does the policyData come from?

The policyData must be generated by the gcp.organizations.getIAMPolicy data source, which defines roles and members.

Using a different cloud?

Explore security guides for other cloud providers:

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