Quita un miembro de una vinculación de función

Se muestra cómo quitar a un miembro de una vinculación de función en una política de IAM.

Explora más

Para obtener documentación detallada en la que se incluye esta muestra de código, consulta lo siguiente:

Administra el acceso a proyectos, carpetas y organizaciones

Muestra de código

C#

Para obtener más obtener información sobre cómo instalar y usar la biblioteca cliente de IAM, consulta Bibliotecas cliente de IAM. Para obtener más información, consulta la documentación de referencia de la API de IAM C#.

Para autenticarte en IAM, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.


using System.Linq;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy RemoveMember(Policy policy, string role, string member)
    {
        try
        {
            var binding = policy.Bindings.First(x => x.Role == role);
            if (binding.Members.Count != 0 && binding.Members.Contains(member))
            {
                binding.Members.Remove(member);
            }
            if (binding.Members.Count == 0)
            {
                policy.Bindings.Remove(binding);
            }
            return policy;
        }
        catch (System.InvalidOperationException e)
        {
            System.Diagnostics.Debug.WriteLine("Role does not exist in policy: \n" + e.ToString());
            return policy;
        }
    }
}

Go

Para autenticarte en IAM, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

import (
	"fmt"
	"io"

	"google.golang.org/api/iam/v1"
)

// removeMember removes a member from a role binding.
func removeMember(w io.Writer, policy *iam.Policy, role, member string) {
	bindings := policy.Bindings
	bindingIndex, memberIndex := -1, -1
	for bIdx := range bindings {
		if bindings[bIdx].Role != role {
			continue
		}
		bindingIndex = bIdx
		for mIdx := range bindings[bindingIndex].Members {
			if bindings[bindingIndex].Members[mIdx] != member {
				continue
			}
			memberIndex = mIdx
			break
		}
	}
	if bindingIndex == -1 {
		fmt.Fprintf(w, "Role %q not found. Member not removed.\n", role)
		return
	}
	if memberIndex == -1 {
		fmt.Fprintf(w, "Role %q found. Member not found.\n", role)
		return
	}

	members := removeIdx(bindings[bindingIndex].Members, memberIndex)
	bindings[bindingIndex].Members = members
	if len(members) == 0 {
		bindings = removeIdx(bindings, bindingIndex)
		policy.Bindings = bindings
	}
	fmt.Fprintf(w, "Role %q found. Member removed.\n", role)
}

// removeIdx removes arr[idx] from arr.
func removeIdx[T any](arr []T, idx int) []T {
	return append(arr[:idx], arr[idx+1:]...)
}

Java

Para autenticarte en IAM, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

import com.google.iam.v1.Binding;
import com.google.iam.v1.Policy;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class RemoveMember {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your policy, GetPolicy.getPolicy(projectId, serviceAccount).
    Policy policy = Policy.newBuilder().build();
    // TODO: Replace with your role.
    String role = "roles/existing-role";
    // TODO: Replace with your member.
    String member = "user:member-to-add@example.com";

    removeMember(policy, role, member);
  }

  // Removes member from a role; removes binding if binding contains no members.
  public static Policy removeMember(Policy policy, String role, String member) {
    // Creating new builder with all values copied from origin policy
    Policy.Builder policyBuilder = policy.toBuilder();

    // Getting binding with suitable role.
    Binding binding = null;
    for (Binding b : policy.getBindingsList()) {
      if (b.getRole().equals(role)) {
        binding = b;
        break;
      }
    }

    if (binding != null && binding.getMembersList().contains(member)) {
      List<String> newMemberList = new ArrayList<>(binding.getMembersList());
      // Removing member from a role
      newMemberList.remove(member);

      System.out.println("Member " + member + " removed from " + role);

      // Adding all remaining members to create new binding
      Binding newBinding = binding.toBuilder()
              .clearMembers()
              .addAllMembers(newMemberList)
              .build();

      List<Binding> newBindingList = new ArrayList<>(policyBuilder.getBindingsList());

      // Removing old binding to replace with new one
      newBindingList.remove(binding);

      // If binding has no more members, binding will not be added
      if (!newBinding.getMembersList().isEmpty()) {
        newBindingList.add(newBinding);
      }

      // Update the policy to remove the member.
      policyBuilder.clearBindings()
              .addAllBindings(newBindingList);
    }

    Policy updatedPolicy = policyBuilder.build();

    System.out.println("Exising members: " + updatedPolicy.getBindingsList());

    return updatedPolicy;
  }
}

Python

Para autenticarte en IAM, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

from google.iam.v1 import policy_pb2
from snippets.get_policy import get_project_policy
from snippets.set_policy import set_project_policy


def modify_policy_remove_member(
    project_id: str, role: str, member: str
) -> policy_pb2.Policy:
    """
    Remove a member from certain role in project policy.

    project_id: ID or number of the Google Cloud project you want to use.
    role: role to which member need to be added.
    member: The principals requesting access.

    Possible format for member:
        * user:{emailid}
        * serviceAccount:{emailid}
        * group:{emailid}
        * deleted:user:{emailid}?uid={uniqueid}
        * deleted:serviceAccount:{emailid}?uid={uniqueid}
        * deleted:group:{emailid}?uid={uniqueid}
        * domain:{domain}
    """
    policy = get_project_policy(project_id)

    for bind in policy.bindings:
        if bind.role == role:
            if member in bind.members:
                bind.members.remove(member)
            break

    return set_project_policy(project_id, policy, False)

¿Qué sigue?

Para buscar y filtrar muestras de código para otros productos de Google Cloud, consulta el navegador de muestra de Google Cloud.