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Administra canales de notificaciones con la API

Por lo general, las políticas de alertas tienen alguna forma de informarte que se activaron. Estas formas de informar se llaman canales de notificación. Hay varios tipos de canales disponibles; cada tipo se explica en un descriptor de canal de notificación. Un canal de notificación de un cierto tipo es una instancia del descriptor de ese tipo. Tus políticas de alertas incluyen referencias a los canales de notificación que se usan como vías de notificación.

Para que un canal de notificación pueda ser utilizado en una política de alertas, primero debe existir. Ya se te proporcionan los descriptores de canal de notificación, pero debes crear los canales para poder usarlos.

Los ejemplos de código que se usan aquí se toman del ejemplo de la API de política de alertas, descrito en Ejemplo: Copia de seguridad y restablecimiento.

Descriptores de canal

Monitoring proporciona varios tipos de canales de notificaciones integrados. Cada uno de estos tipos se describe en un NotificationChannelDescriptor. Estos descriptores tienen un campo type, y el valor de este campo actúa como su identificador cuando se crean instancias de ese tipo de canal. Puedes recuperar los tipos de canales disponibles, que se describen de forma más general en Opciones de notificación, con el siguiente comando:

$ gcloud beta monitoring channel-descriptors list --format='value(type)'
campfire
email
hipchat
pagerduty
pubsub
slack
sms
webhook_basicauth
webhook_tokenauth

Para recuperar todos los descriptores de canales de un proyecto, usa el método notificationChannelDescriptors.list. Los descriptores recuperados son de solo lectura.

Si buscas un descriptor específico y sabes su nombre, puedes usar el método notificationChannelDescriptors.get para recuperar solo ese descriptor. El nombre de un descriptor de canal debe tener el formato projects/[PROJECT_ID]/notificationChannelDescriptors/[CHANNEL_TYPE][CHANNEL_TYPE], como uno de los tipos que se mencionan antes, por ejemplo:

projects/[PROJECT_ID]/notificationChannelDescriptors/email

gcloud

Para mostrar la lista de todos los descriptores de canales de notificaciones en un proyecto, usa el comando gcloud beta monitoring channel-descriptors list:

gcloud beta monitoring channel-descriptors list

Si se ejecuta de forma correcta, el comando list proporciona una lista de todos los descriptores de canales en el proyecto especificado. Por ejemplo, el descriptor de canal email aparece en la lista de la siguiente manera:

    ---
    description: A channel that sends notifications via email.
    displayName: Email
    labels:
    - description: An address to send email.
      key: email_address
    name: projects/[PROJECT_ID]/notificationChannelDescriptors/email
    type: email
    ---

Todos los descriptores de canales incluyen estos campos:

  • name: El nombre de recurso completamente calificado del descriptor de canales
  • type: La parte del nombre que indica el tipo de canal
  • displayName: Una descripción del campo type. Se usa para fines de visualización.
  • description: Una descripción breve del canal.
  • labels: Un conjunto de campos específicos para un tipo de canal. Cada tipo de canal tiene su propio conjunto de etiquetas.

Cuando se crea un canal, también obtiene un campo enabled, con el valor true de forma predeterminada.

Para mostrar un descriptor de un solo canal, usa gcloud beta monitoring channel-descriptors describe y especifica el nombre del descriptor. No es necesario que especifique el nombre completo. Por ejemplo, ambos comandos muestran la lista anterior:

gcloud beta monitoring channel-descriptors describe email

gcloud beta monitoring channel-descriptors describe projects/[PROJECT_ID]/notificationChannelDescriptors/email

Consulta las referencias gcloud beta monitoring channel-descriptors list y describe para obtener más información. El comando describe corresponde al método notificationChannelDescriptors.get en la API.

Canales de notificación

Un canal de notificación es una instancia de uno de los descriptores de canal de notificación analizados en Descriptores de canal.

El recurso NotificationChannel admite las siguientes operaciones:

  • Crear canales nuevos
  • Borrar canales existentes
  • Recuperar canales específicos
  • Recuperar todos los canales
  • Modificar los canales existentes

Hay otras tres operaciones relacionadas con la administración del campo verificationStatus de un canal:

  • Enviar un código de verificación
  • Generar un código para copiar el estado de verificación de un canal verificado en otros canales idénticos en el mismo proyecto o en uno nuevo
  • Verificar el canal mediante el código creado en las dos operaciones anteriores

Consulta la referencia de notificationChannels para obtener más información al respecto.

Crea canales

Puedes crear canales de notificaciones desde archivos JSON o YAML con la herramienta de línea de comandos de gcloud y puedes hacerlo de manera programática.

Para crear un canal de notificación, debes completar los valores de los campos de su descriptor. La mayoría, como type, son comunes en todos los descriptores de canales de notificaciones; consulta notificationChannelDescriptors.

Cada descriptor posee, además, un conjunto de etiquetas que varía de un descriptor a otro. Para ver el conjunto de etiquetas de un descriptor en particular, recupera el descriptor con el comando gcloud beta monitoring channel-descriptors describe que se describe en Descriptores de canales. Por ejemplo, cuando se recupera el descriptor de canal email, se muestra una sola etiqueta:

    labels:
    - description: An address to send email.
      key: email_address

Cuando se recupera el descriptor de canal webhook_basicauth, se muestran varias etiquetas:

    labels:
    - description: The password. The field is obfuscated when the channel is fetched.
      key: password
    - description: The URL to which to publish the webhook.
      key: url
    - description: The username.
      key: username

Ya sea que crees un canal nuevo de manera programática o desde la línea de comandos, el valor de type en tu especificación debe coincidir con el campo type en el descriptor de canal de notificaciones correspondiente. Las claves de etiquetas necesarias también deben coincidir con las del descriptor de canal.

Algunas etiquetas corresponden a las credenciales que se usan para autenticarse con el proveedor. Cuando se crea un canal, los valores para estas etiquetas deben obtenerse del proveedor. Obtener una credencial puede implicar el uso de una página para generar claves de API en el sitio web del proveedor o completar un flujo de acceso de OAuth con el proveedor. Los detalles específicos para obtener esa credencial dependen de cada proveedor.

Por ejemplo, a continuación se muestra la especificación de un nuevo canal de notificaciones pubsub en JSON:

    {
      "type": "pubsub",
      "displayName": "Alert notifications",
      "description": "Pub/Sub channel for alert notifications",
      "labels": {
        "topic": "projects/[PROJECT_ID]/topics/notificationTopic"
      },
    }

El valor type (pubsub) y la clave de una sola etiqueta (topic) coinciden con los campos type y labels.key en el descriptor de canal correspondiente.

Los canales están habilitados de manera predeterminada. Si deseas crear un canal inactivo, puedes incluir el campo enabled con el valor false.

Los siguientes ejemplos ilustran la creación de los canales de notificación.

gcloud

Para crear un canal de notificaciones en un proyecto, usa el comando gcloud beta monitoring channels create. Si deseas cargar el canal desde un archivo, usa la marca --channel-content-from-file para especificarlo.

Con el siguiente ejemplo, se crea un nuevo canal de Pub/Sub desde el archivo pubsub-channel.json:

gcloud beta monitoring channels create --channel-content-from-file="pubsub-channel.json"

Si funciona, este comando muestra el nombre del canal nuevo, por ejemplo:

    Created notification channel [projects/[PROJECT_ID]/notificationChannels/1355376463305411567].

Consulta la referencia de gcloud beta monitoring channels create para obtener más información.

C#

static void RestorePolicies(string projectId, string filePath)
{
    var policyClient = AlertPolicyServiceClient.Create();
    var channelClient = NotificationChannelServiceClient.Create();
    List<Exception> exceptions = new List<Exception>();
    var backup = JsonConvert.DeserializeObject<BackupRecord>(
        File.ReadAllText(filePath), new ProtoMessageConverter());
    var projectName = new ProjectName(projectId);
    bool isSameProject = projectId == backup.ProjectId;
    // When a channel is recreated, rather than updated, it will get
    // a new name.  We have to update the AlertPolicy with the new
    // name.  Track the names in this map.
    var channelNameMap = new Dictionary<string, string>();
    foreach (NotificationChannel channel in backup.Channels)
    {
        try
        {
            bool updated = false;
            Console.WriteLine("Updating channel.\n{0}",
                channel.DisplayName);
            // This field is immutable and it is illegal to specify a
            // non-default value (UNVERIFIED or VERIFIED) in the
            // Create() or Update() operations.
            channel.VerificationStatus = NotificationChannel.Types
                .VerificationStatus.Unspecified;
            if (isSameProject)
                try
                {
                    channelClient.UpdateNotificationChannel(
                        null, channel);
                    updated = true;
                }
                catch (Grpc.Core.RpcException e)
                when (e.Status.StatusCode == StatusCode.NotFound)
                { }
            if (!updated)
            {
                // The channel no longer exists.  Recreate it.
                string oldName = channel.Name;
                channel.Name = null;
                var response = channelClient.CreateNotificationChannel(
                    projectName, channel);
                channelNameMap.Add(oldName, response.Name);
            }
        }
        catch (Exception e)
        {
            // If one failed, continue trying to update the others.
            exceptions.Add(e);
        }
    }
    foreach (AlertPolicy policy in backup.Policies)
    {
    }
    if (exceptions.Count > 0)
    {
        throw new AggregateException(exceptions);
    }
}

Node.js


// Imports the Google Cloud client library
const monitoring = require('@google-cloud/monitoring');

// Creates clients
const alertClient = new monitoring.AlertPolicyServiceClient();
const notificationClient = new monitoring.NotificationChannelServiceClient();

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const alertPolicyId = '123456789012314';
// const channelIds = [
//   'channel-1',
//   'channel-2',
//   'channel-3',
// ];

const notificationChannels = channelIds.map(id =>
  notificationClient.projectNotificationChannelPath(projectId, id)
);

for (const channel of notificationChannels) {
  const updateChannelRequest = {
    updateMask: {
      paths: ['enabled'],
    },
    notificationChannel: {
      name: channel,
      enabled: {
        value: true,
      },
    },
  };
  try {
    await notificationClient.updateNotificationChannel(updateChannelRequest);
  } catch (err) {
    const createChannelRequest = {
      notificationChannel: {
        name: channel,
        notificationChannel: {
          type: 'email',
        },
      },
    };
    const newChannel = await notificationClient.createNotificationChannel(
      createChannelRequest
    );
    notificationChannels.push(newChannel);
  }
}

const updateAlertPolicyRequest = {
  updateMask: {
    paths: ['notification_channels'],
  },
  alertPolicy: {
    name: alertClient.projectAlertPolicyPath(projectId, alertPolicyId),
    notificationChannels: notificationChannels,
  },
};
const [alertPolicy] = await alertClient.updateAlertPolicy(
  updateAlertPolicyRequest
);
console.log(`Updated ${alertPolicy.name}.`);

Go


// restorePolicies updates the project with the alert policies and
// notification channels in r.
func restorePolicies(w io.Writer, projectID string, r io.Reader) error {
	b := backup{}
	if err := json.NewDecoder(r).Decode(&b); err != nil {
		return err
	}
	sameProject := projectID == b.ProjectID

	ctx := context.Background()

	alertClient, err := monitoring.NewAlertPolicyClient(ctx)
	if err != nil {
		return err
	}
	channelClient, err := monitoring.NewNotificationChannelClient(ctx)
	if err != nil {
		return err
	}

	// When a channel is recreated, rather than updated, it will get
	// a new name.  We have to update the AlertPolicy with the new
	// name.  channelNames keeps track of the new names.
	channelNames := make(map[string]string)
	for _, c := range b.Channels {
		fmt.Fprintf(w, "Updating channel %q\n", c.GetDisplayName())
		c.VerificationStatus = monitoringpb.NotificationChannel_VERIFICATION_STATUS_UNSPECIFIED
		updated := false
		if sameProject {
			req := &monitoringpb.UpdateNotificationChannelRequest{
				NotificationChannel: c.NotificationChannel,
			}
			_, err := channelClient.UpdateNotificationChannel(ctx, req)
			if err == nil {
				updated = true
			}
		}
		if !updated {
			req := &monitoringpb.CreateNotificationChannelRequest{
				Name:                "projects/" + projectID,
				NotificationChannel: c.NotificationChannel,
			}
			oldName := c.GetName()
			c.Name = ""
			newC, err := channelClient.CreateNotificationChannel(ctx, req)
			if err != nil {
				return err
			}
			channelNames[oldName] = newC.GetName()
		}
	}

	for _, policy := range b.AlertPolicies {
		fmt.Fprintf(w, "Updating alert %q\n", policy.GetDisplayName())
		policy.CreationRecord = nil
		policy.MutationRecord = nil
		for i, aChannel := range policy.GetNotificationChannels() {
			if c, ok := channelNames[aChannel]; ok {
				policy.NotificationChannels[i] = c
			}
		}
		updated := false
		if sameProject {
			req := &monitoringpb.UpdateAlertPolicyRequest{
				AlertPolicy: policy.AlertPolicy,
			}
			_, err := alertClient.UpdateAlertPolicy(ctx, req)
			if err == nil {
				updated = true
			}
		}
		if !updated {
			req := &monitoringpb.CreateAlertPolicyRequest{
				Name:        "projects/" + projectID,
				AlertPolicy: policy.AlertPolicy,
			}
			if _, err = alertClient.CreateAlertPolicy(ctx, req); err != nil {
				log.Fatal(err)
			}
		}
	}
	fmt.Fprintf(w, "Successfully restored alerts.")
	return nil
}

Java

private static Map<String, String> restoreNotificationChannels(
    String projectId, List<NotificationChannel> channels, boolean isSameProject)
    throws IOException {
  Map<String, String> newChannelNames = Maps.newHashMap();
  try (NotificationChannelServiceClient client = NotificationChannelServiceClient.create()) {
    for (NotificationChannel channel : channels) {
      // Update channel name if project ID is different.
      boolean channelUpdated = false;
      if (isSameProject) {
        try {
          NotificationChannel updatedChannel =
              client.updateNotificationChannel(NOTIFICATION_CHANNEL_UPDATE_MASK, channel);
          newChannelNames.put(channel.getName(), updatedChannel.getName());
          channelUpdated = true;
        } catch (Exception e) {
          channelUpdated = false;
        }
      }
      if (!channelUpdated) {
        NotificationChannel newChannel =
            client.createNotificationChannel(
                ProjectName.of(projectId),
                channel.toBuilder().clearName().clearVerificationStatus().build());
        newChannelNames.put(channel.getName(), newChannel.getName());
      }
    }
  }
  return newChannelNames;
}

PHP

use Google\Cloud\Monitoring\V3\NotificationChannelServiceClient;
use Google\Cloud\Monitoring\V3\NotificationChannel;

/**
 * @param string $projectId Your project ID
 */
function alert_create_channel($projectId)
{
    $channelClient = new NotificationChannelServiceClient([
        'projectId' => $projectId,
    ]);
    $projectName = $channelClient->projectName($projectId);

    $channel = new NotificationChannel();
    $channel->setDisplayName('Test Notification Channel');
    $channel->setType('email');
    $channel->setLabels(['email_address' => 'fake@example.com']);

    $channel = $channelClient->createNotificationChannel($projectName, $channel);
    printf('Created notification channel %s' . PHP_EOL, $channel->getName());
}

Python

def restore(project_name, backup_filename):
    print(
        "Loading alert policies and notification channels from {}.".format(
            backup_filename
        )
    )
    record = json.load(open(backup_filename, "rt"))
    is_same_project = project_name == record["project_name"]
    # Convert dicts to AlertPolicies.
    policies_json = [json.dumps(policy) for policy in record["policies"]]
    policies = [
        monitoring_v3.AlertPolicy.from_json(policy_json)
        for policy_json in policies_json
    ]
    # Convert dicts to NotificationChannels
    channels_json = [json.dumps(channel) for channel in record["channels"]]
    channels = [
        monitoring_v3.NotificationChannel.from_json(channel_json)
        for channel_json in channels_json
    ]

    # Restore the channels.
    channel_client = monitoring_v3.NotificationChannelServiceClient()
    channel_name_map = {}

    for channel in channels:
        updated = False
        print("Updating channel", channel.display_name)
        # This field is immutable and it is illegal to specify a
        # non-default value (UNVERIFIED or VERIFIED) in the
        # Create() or Update() operations.
        channel.verification_status = (
            monitoring_v3.NotificationChannel.VerificationStatus.VERIFICATION_STATUS_UNSPECIFIED
        )

        if is_same_project:
            try:
                channel_client.update_notification_channel(notification_channel=channel)
                updated = True
            except google.api_core.exceptions.NotFound:
                pass  # The channel was deleted.  Create it below.

        if not updated:
            # The channel no longer exists.  Recreate it.
            old_name = channel.name
            del channel.name
            new_channel = channel_client.create_notification_channel(
                name=project_name, notification_channel=channel
            )
            channel_name_map[old_name] = new_channel.name

    # Restore the alerts
    alert_client = monitoring_v3.AlertPolicyServiceClient()

    for policy in policies:
        print("Updating policy", policy.display_name)
        # These two fields cannot be set directly, so clear them.
        del policy.creation_record
        del policy.mutation_record

        # Update old channel names with new channel names.
        for i, channel in enumerate(policy.notification_channels):
            new_channel = channel_name_map.get(channel)
            if new_channel:
                policy.notification_channels[i] = new_channel

        updated = False

        if is_same_project:
            try:
                alert_client.update_alert_policy(alert_policy=policy)
                updated = True
            except google.api_core.exceptions.NotFound:
                pass  # The policy was deleted.  Create it below.
            except google.api_core.exceptions.InvalidArgument:
                # Annoying that API throws InvalidArgument when the policy
                # does not exist.  Seems like it should throw NotFound.
                pass  # The policy was deleted.  Create it below.

        if not updated:
            # The policy no longer exists.  Recreate it.
            old_name = policy.name
            del policy.name
            for condition in policy.conditions:
                del condition.name
            policy = alert_client.create_alert_policy(
                name=project_name, alert_policy=policy
            )
        print("Updated", policy.name)

Recuperación de canales

Para recuperar todos los canales de notificaciones de un proyecto, usa el método notificationChannels.list. Este método también admite opciones filter y orderBy para restringir y ordenar los resultados; consulta Ordena y filtra.

Si buscas un canal específico y sabes su nombre, puedes usar el método notificationChannels.get para recuperar solo ese canal. El nombre de un canal tiene el formato projects/[PROJECT_ID]/notificationChannels/[CHANNEL_ID], por ejemplo:

    projects/[PROJECT_ID]/notificationChannels/1355376463305411567

Cuando recuperas un canal, los valores sensibles, como los tokens de autenticación y las claves de API, pueden ofuscarse por motivos de seguridad. Si copias un canal existente para crear uno nuevo, debes corregir los valores ofuscados.

gcloud

Para enumerar todos los canales de notificaciones en un proyecto, usa el comando gcloud beta monitoring channels list:

gcloud beta monitoring channels list

Si se ejecuta de forma correcta, el comando list proporciona una lista de todos los canales del proyecto especificado. Por ejemplo, puede que el comando anterior muestre una lista que incluye las siguientes entradas:

    ---
    description: E-mail channel created by gcloud as a test
    displayName: test e-mail channel
    enabled: false
    labels:
      email_address: user@example.com
    name: projects/[PROJECT_ID]/notificationChannels/1355376463305411567
    type: email
    ---
    description: Pub/Sub channel for alert notifications
    displayName: Alert notifications
    enabled: true
    labels:
      topic: projects/[PROJECT_ID}/topics/notificationTopic
    name: projects/[PROJECT_ID]/notificationChannels/1355376463305411567
    type: pubsub

Para mostrar un solo canal, usa gcloud beta monitoring channels describe y especifica el nombre del canal. Por ejemplo, este comando muestra el canal de Pub/Sub que se muestra en la lista anterior:

gcloud beta monitoring channels describe projects/[PROJECT_ID]/notificationChannels/1355376463305411567




Consulta las referencias gcloud beta monitoring channels list y describe para obtener más información. El comando describe corresponde al método notificationChannels.get en la API.







  
C#


    


    




  

  








  
static void ListNotificationChannels(string projectId)
{
    var client = NotificationChannelServiceClient.Create();
    var response = client.ListNotificationChannels(new ProjectName(projectId));
    foreach (NotificationChannel channel in response)
    {
        Console.WriteLine(channel.Name);
        if (channel.DisplayName != null)
        {
            Console.WriteLine(channel.DisplayName);
        }
        Console.WriteLine();
    }
}









  
Node.js


    


    




  

  








  

// Imports the Google Cloud client library
const monitoring = require('@google-cloud/monitoring');

// Creates a client
const client = new monitoring.NotificationChannelServiceClient();

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const filter = 'A filter for selecting policies, e.g. description:"cloud"';

const request = {
  name: client.projectPath(projectId),
  filter,
};
const channels = await client.listNotificationChannels(request);
console.log(channels);
for (const channel of channels[0]) {
  console.log(`Deleting channel ${channel.displayName}`);
  try {
    await client.deleteNotificationChannel({
      name: channel.name,
    });
  } catch (err) {
    // ignore error
  }
}








  
Go


    


    




  

  








  
channelClient, err := monitoring.NewNotificationChannelClient(ctx)
if err != nil {
	return err
}
channelReq := &monitoringpb.ListNotificationChannelsRequest{
	Name: "projects/" + projectID,
	// Filter:  "", // See https://cloud.google.com/monitoring/api/v3/sorting-and-filtering.
	// OrderBy: "", // See https://cloud.google.com/monitoring/api/v3/sorting-and-filtering.
}
channelIt := channelClient.ListNotificationChannels(ctx, channelReq)
for {
	resp, err := channelIt.Next()
	if err == iterator.Done {
		break
	}
	if err != nil {
		return err
	}
	b.Channels = append(b.Channels, &channel{resp})
}








  
Java


    


    




  

  








  
private static List<NotificationChannel> getNotificationChannels(String projectId)
    throws IOException {
  List<NotificationChannel> notificationChannels = Lists.newArrayList();
  try (NotificationChannelServiceClient client = NotificationChannelServiceClient.create()) {
    ListNotificationChannelsPagedResponse listNotificationChannelsResponse =
        client.listNotificationChannels(ProjectName.of(projectId));
    for (NotificationChannel channel : listNotificationChannelsResponse.iterateAll()) {
      notificationChannels.add(channel);
    }
  }
  return notificationChannels;
}








  
PHP


    


    




  

  








  
use Google\Cloud\Monitoring\V3\NotificationChannelServiceClient;

/**
 * @param string $projectId Your project ID
 */
function alert_list_channels($projectId)
{
    $channelClient = new NotificationChannelServiceClient([
        'projectId' => $projectId,
    ]);

    $channels = $channelClient->listNotificationChannels(
        $channelClient->projectName($projectId)
    );
    foreach ($channels->iterateAllElements() as $channel) {
        printf('Name: %s (%s)' . PHP_EOL, $channel->getDisplayName(), $channel->getName());
    }
}








  
Python


    


    




  

  








  
def list_notification_channels(project_name):
    client = monitoring_v3.NotificationChannelServiceClient()
    channels = client.list_notification_channels(name=project_name)
    print(
        tabulate.tabulate(
            [(channel.name, channel.display_name) for channel in channels],
            ("name", "display_name"),
        )
    )












Borrar canales



Para borrar un canal de notificaciones de un proyecto, usa el método notificationChannels.delete y proporciona el nombre del canal de notificaciones que deseas borrar. El nombre de un canal es el valor del campo name, no de displayName, en la instancia NotificationChannel. El nombre de un canal tiene el formato projects/[PROJECT_ID]/notificationChannels/[CHANNEL_ID], por ejemplo:



    projects/[PROJECT_ID]/notificationChannels/1355376463305411567




De forma predeterminada, si intentas borrar un canal al que hace referencia una política de alertas, este no se borrará. Para forzar la eliminación de las referencias de las políticas de alertas y borrar el canal, establece la opción force en true.







  
gcloud



Para borrar un canal de notificaciones, usa gcloud beta monitoring channels
delete y especifica el nombre del canal que deseas borrar. Por ejemplo, con el siguiente comando, se borra el canal email, que se creó en otro ejemplo:


gcloud beta monitoring channels delete projects/[PROJECT_ID]/notificationChannels/1355376463305411567



Consulta la referencia de gcloud beta monitoring channels delete para obtener más información.




  
C#


    


    




  

  








  

using Google.Cloud.Monitoring.V3;
using System;

partial class AlertSnippets
{
    public void DeleteNotificationChannel(
        string channelName = "projects/your-project-id/notificationChannels/123")
    {
        var client = NotificationChannelServiceClient.Create();
        client.DeleteNotificationChannel(
            name: NotificationChannelName.Parse(channelName),
            force: true);
        Console.WriteLine("Deleted {0}.", channelName);
    }
}










  
Go


    


    




  

  








  

import (
	"context"
	"fmt"
	"io"

	monitoring "cloud.google.com/go/monitoring/apiv3"
	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
)

// deleteChannel deletes the given channel. channelName should be of the form
// "projects/[PROJECT_ID]/notificationChannels/[CHANNEL_ID]".
func deleteChannel(w io.Writer, channelName string) error {
	ctx := context.Background()

	client, err := monitoring.NewNotificationChannelClient(ctx)
	if err != nil {
		return err
	}

	req := &monitoringpb.DeleteNotificationChannelRequest{
		Name: channelName,
	}

	if err := client.DeleteNotificationChannel(ctx, req); err != nil {
		return fmt.Errorf("DeleteNotificationChannel: %v", err)
	}

	fmt.Fprintf(w, "Deleted channel %q", channelName)
	return nil
}









  
Java


    


    




  

  








  
static void deleteNotificationChannel(String channelName) throws IOException {
  String projectId = System.getProperty("projectId");
  try (NotificationChannelServiceClient client = NotificationChannelServiceClient.create()) {
    NotificationChannelName name = NotificationChannelName.of(projectId, channelName);
    client.deleteNotificationChannel(channelName, false);
    System.out.println("Deleted notification channel " + channelName);
  }
}








  
PHP


    


    




  

  








  
use Google\Cloud\Monitoring\V3\NotificationChannelServiceClient;

/**
 * @param string $projectId Your project ID
 */
function alert_delete_channel($projectId, $channelId)
{
    $channelClient = new NotificationChannelServiceClient([
        'projectId' => $projectId,
    ]);
    $channelName = $channelClient->notificationChannelName($projectId, $channelId);

    $channelClient->deleteNotificationChannel($channelName);
    printf('Deleted notification channel %s' . PHP_EOL, $channelName);
}








  
Node.js


    


    




  

  








  

// Imports the Google Cloud client library
const monitoring = require('@google-cloud/monitoring');

// Creates a client
const client = new monitoring.NotificationChannelServiceClient();

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const filter = 'A filter for selecting policies, e.g. description:"cloud"';

const request = {
  name: client.projectPath(projectId),
  filter,
};
const channels = await client.listNotificationChannels(request);
console.log(channels);
for (const channel of channels[0]) {
  console.log(`Deleting channel ${channel.displayName}`);
  try {
    await client.deleteNotificationChannel({
      name: channel.name,
    });
  } catch (err) {
    // ignore error
  }
}








  
Python


    


    




  

  








  
def delete_notification_channels(project_name, channel_ids, force=None):
    channel_client = monitoring_v3.NotificationChannelServiceClient()
    for channel_id in channel_ids:
        channel_name = "{}/notificationChannels/{}".format(project_name, channel_id)
        try:
            channel_client.delete_notification_channel(name=channel_name, force=force)
            print("Channel {} deleted".format(channel_name))
        except ValueError:
            print("The parameters are invalid")
        except Exception as e:
            print("API call failed: {}".format(e))












Modificación de canales



Para modificar un canal de notificaciones, usa el método notificationChannels.patch (en la API de REST).
Otras implementaciones de la API y la herramienta de línea de comandos de gcloud llaman a esto update, en lugar de patch.



Una operación de actualización puede reemplazar el canal existente por completo o puede modificar un subconjunto de campos. Por ejemplo, puedes habilitar o inhabilitar el canal.
La inhabilitación de un canal impide la entrega de notificaciones al canal.
Si se pretende que el cambio sea temporal, por lo general, es más conveniente inhabilitar un canal que eliminarlo de las políticas de alertas que hacen referencia a él.







  
gcloud



Para habilitar un canal de notificaciones que esté inhabilitado, usa el comando gcloud beta monitoring channels update y proporciona la marca --enabled. Con el siguiente comando, se habilita el canal de notificaciones email que se creó, en el estado inhabilitado, en un ejemplo anterior:


gcloud beta monitoring channels update projects/[PROJECT_ID]/notificationChannels/1355376463305411567 --enabled



Para inhabilitar una política, usa el mismo comando y proporciona la marca --no-enabled.
Consulta la referencia de gcloud beta monitoring channels update para obtener más información. El comando update corresponde al método notificationChannels.patch en la API de REST.







  
C#


    


    




  

  








  

using Google.Cloud.Monitoring.V3;
using Google.Protobuf.WellKnownTypes;
using System;

partial class AlertSnippets
{
    public NotificationChannel EnableNotificationChannel(
        string channelName = "projects/your-project-id/notificationChannels/123")
    {
        var client = NotificationChannelServiceClient.Create();
        NotificationChannel channel = new NotificationChannel();
        channel.Enabled = true;
        channel.Name = channelName;
        var fieldMask = new FieldMask { Paths = { "enabled" } };
        channel = client.UpdateNotificationChannel(
            updateMask: fieldMask,
            notificationChannel: channel);
        Console.WriteLine("Enabled {0}.", channel.Name);
        return channel;
    }
}










  
Go


    


    




  

  








  

import (
	"context"
	"fmt"
	"io"

	monitoring "cloud.google.com/go/monitoring/apiv3"
	"github.com/golang/protobuf/ptypes/wrappers"
	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
	"google.golang.org/genproto/protobuf/field_mask"
)

// enableChannel enables the given channel. channelName should be of the form
// "projects/[PROJECT_ID]/notificationChannels/[CHANNEL_ID]".
func enableChannel(w io.Writer, channelName string) error {
	ctx := context.Background()

	client, err := monitoring.NewNotificationChannelClient(ctx)
	if err != nil {
		return err
	}

	req := &monitoringpb.UpdateNotificationChannelRequest{
		UpdateMask: &field_mask.FieldMask{Paths: []string{"enabled"}},
		NotificationChannel: &monitoringpb.NotificationChannel{
			Name:    channelName,
			Enabled: &wrappers.BoolValue{Value: true},
		},
	}

	if _, err := client.UpdateNotificationChannel(ctx, req); err != nil {
		return fmt.Errorf("EnableNotificationChannel: %v", err)
	}

	fmt.Fprintf(w, "Enabled channel %q", channelName)
	return nil
}









  
Node.js


    


    




  

  








  

// Imports the Google Cloud client library
const monitoring = require('@google-cloud/monitoring');

// Creates clients
const alertClient = new monitoring.AlertPolicyServiceClient();
const notificationClient = new monitoring.NotificationChannelServiceClient();

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const alertPolicyId = '123456789012314';
// const channelIds = [
//   'channel-1',
//   'channel-2',
//   'channel-3',
// ];

const notificationChannels = channelIds.map(id =>
  notificationClient.projectNotificationChannelPath(projectId, id)
);

for (const channel of notificationChannels) {
  const updateChannelRequest = {
    updateMask: {
      paths: ['enabled'],
    },
    notificationChannel: {
      name: channel,
      enabled: {
        value: true,
      },
    },
  };
  try {
    await notificationClient.updateNotificationChannel(updateChannelRequest);
  } catch (err) {
    const createChannelRequest = {
      notificationChannel: {
        name: channel,
        notificationChannel: {
          type: 'email',
        },
      },
    };
    const newChannel = await notificationClient.createNotificationChannel(
      createChannelRequest
    );
    notificationChannels.push(newChannel);
  }
}

const updateAlertPolicyRequest = {
  updateMask: {
    paths: ['notification_channels'],
  },
  alertPolicy: {
    name: alertClient.projectAlertPolicyPath(projectId, alertPolicyId),
    notificationChannels: notificationChannels,
  },
};
const [alertPolicy] = await alertClient.updateAlertPolicy(
  updateAlertPolicyRequest
);
console.log(`Updated ${alertPolicy.name}.`);








  
Java


    


    




  

  








  
private static Map<String, String> restoreNotificationChannels(
    String projectId, List<NotificationChannel> channels, boolean isSameProject)
    throws IOException {
  Map<String, String> newChannelNames = Maps.newHashMap();
  try (NotificationChannelServiceClient client = NotificationChannelServiceClient.create()) {
    for (NotificationChannel channel : channels) {
      // Update channel name if project ID is different.
      boolean channelUpdated = false;
      if (isSameProject) {
        try {
          NotificationChannel updatedChannel =
              client.updateNotificationChannel(NOTIFICATION_CHANNEL_UPDATE_MASK, channel);
          newChannelNames.put(channel.getName(), updatedChannel.getName());
          channelUpdated = true;
        } catch (Exception e) {
          channelUpdated = false;
        }
      }
      if (!channelUpdated) {
        NotificationChannel newChannel =
            client.createNotificationChannel(
                ProjectName.of(projectId),
                channel.toBuilder().clearName().clearVerificationStatus().build());
        newChannelNames.put(channel.getName(), newChannel.getName());
      }
    }
  }
  return newChannelNames;
}








  
PHP


    


    




  

  








  
use Google\Cloud\Monitoring\V3\AlertPolicyServiceClient;
use Google\Cloud\Monitoring\V3\NotificationChannelServiceClient;
use Google\Cloud\Monitoring\V3\AlertPolicy;
use Google\Cloud\Monitoring\V3\NotificationChannel;
use Google\Cloud\Monitoring\V3\NotificationChannel\VerificationStatus;
use Google\ApiCore\ApiException;

/**
 * @param string $projectId Your project ID
 */
function alert_restore_policies($projectId)
{
    $alertClient = new AlertPolicyServiceClient([
        'projectId' => $projectId,
    ]);

    $channelClient = new NotificationChannelServiceClient([
        'projectId' => $projectId,
    ]);

    print('Loading alert policies and notification channels from backup.json.' . PHP_EOL);
    $projectName = $alertClient->projectName($projectId);
    $record = json_decode(file_get_contents('backup.json'), true);
    $isSameProject = $projectName == $record['project_name'];

    # Convert dicts to AlertPolicies.
    $policies = [];
    foreach ($record['policies'] as $policyArray) {
        $policy = new AlertPolicy();
        $policy->mergeFromJsonString(json_encode($policyArray));
        $policies[] = $policy;
    }

    # Convert dicts to NotificationChannels
    $channels = [];
    foreach (array_filter($record['channels']) as $channelArray) {
        $channel = new NotificationChannel();
        $channel->mergeFromJsonString(json_encode($channelArray));
        $channels[] = $channel;
    }

    # Restore the channels.
    $channelNameMap = [];
    foreach ($channels as $channel) {
        $updated = false;
        printf('Updating channel %s' . PHP_EOL, $channel->getDisplayName());

        # This field is immutable and it is illegal to specify a
        # non-default value (UNVERIFIED or VERIFIED) in the
        # Create() or Update() operations.
        $channel->setVerificationStatus(
            VerificationStatus::VERIFICATION_STATUS_UNSPECIFIED
        );

        if ($isSameProject) {
            try {
                $channelClient->updateNotificationChannel($channel);
                $updated = true;
            } catch (ApiException $e) {
                # The channel was deleted.  Create it below.
                if ($e->getStatus() !== 'NOT_FOUND') {
                    throw $e;
                }
            }
        }

        if (!$updated) {
            # The channel no longer exists.  Recreate it.
            $oldName = $channel->getName();
            $channel->setName('');
            $newChannel = $channelClient->createNotificationChannel(
                $projectName,
                $channel
            );
            $channelNameMap[$oldName] = $newChannel->getName();
        }
    }

    # Restore the alerts
    foreach ($policies as $policy) {
        printf('Updating policy %s' . PHP_EOL, $policy->getDisplayName());
        # These two fields cannot be set directly, so clear them.
        $policy->setCreationRecord(null);
        $policy->setMutationRecord(null);

        $notificationChannels = $policy->getNotificationChannels();

        # Update old channel names with new channel names.
        foreach ($notificationChannels as $i => $channel) {
            if (isset($channelNameMap[$channel])) {
                $notificationChannels[$i] = $channelNameMap[$channel];
            }
        }

        $updated = false;
        if ($isSameProject) {
            try {
                $alertClient->updateAlertPolicy($policy);
                $updated = true;
            } catch (ApiException $e) {
                # The policy was deleted.  Create it below.
                if ($e->getStatus() !== 'NOT_FOUND') {
                    throw $e;
                }
            }
        }

        if (!$updated) {
            # The policy no longer exists.  Recreate it.
            $oldName = $policy->getName();
            $policy->setName('');
            foreach ($policy->getConditions() as $condition) {
                $condition->setName('');
            }
            $policy = $alertClient->createAlertPolicy($projectName, $policy);
        }
        printf('Updated %s' . PHP_EOL, $policy->getName());
    }
    print('Restored alert policies and notification channels from backup.json.');
}








  
Python


    


    




  

  








  
def restore(project_name, backup_filename):
    print(
        "Loading alert policies and notification channels from {}.".format(
            backup_filename
        )
    )
    record = json.load(open(backup_filename, "rt"))
    is_same_project = project_name == record["project_name"]
    # Convert dicts to AlertPolicies.
    policies_json = [json.dumps(policy) for policy in record["policies"]]
    policies = [
        monitoring_v3.AlertPolicy.from_json(policy_json)
        for policy_json in policies_json
    ]
    # Convert dicts to NotificationChannels
    channels_json = [json.dumps(channel) for channel in record["channels"]]
    channels = [
        monitoring_v3.NotificationChannel.from_json(channel_json)
        for channel_json in channels_json
    ]

    # Restore the channels.
    channel_client = monitoring_v3.NotificationChannelServiceClient()
    channel_name_map = {}

    for channel in channels:
        updated = False
        print("Updating channel", channel.display_name)
        # This field is immutable and it is illegal to specify a
        # non-default value (UNVERIFIED or VERIFIED) in the
        # Create() or Update() operations.
        channel.verification_status = (
            monitoring_v3.NotificationChannel.VerificationStatus.VERIFICATION_STATUS_UNSPECIFIED
        )

        if is_same_project:
            try:
                channel_client.update_notification_channel(notification_channel=channel)
                updated = True
            except google.api_core.exceptions.NotFound:
                pass  # The channel was deleted.  Create it below.

        if not updated:
            # The channel no longer exists.  Recreate it.
            old_name = channel.name
            del channel.name
            new_channel = channel_client.create_notification_channel(
                name=project_name, notification_channel=channel
            )
            channel_name_map[old_name] = new_channel.name

    # Restore the alerts
    alert_client = monitoring_v3.AlertPolicyServiceClient()

    for policy in policies:
        print("Updating policy", policy.display_name)
        # These two fields cannot be set directly, so clear them.
        del policy.creation_record
        del policy.mutation_record

        # Update old channel names with new channel names.
        for i, channel in enumerate(policy.notification_channels):
            new_channel = channel_name_map.get(channel)
            if new_channel:
                policy.notification_channels[i] = new_channel

        updated = False

        if is_same_project:
            try:
                alert_client.update_alert_policy(alert_policy=policy)
                updated = True
            except google.api_core.exceptions.NotFound:
                pass  # The policy was deleted.  Create it below.
            except google.api_core.exceptions.InvalidArgument:
                # Annoying that API throws InvalidArgument when the policy
                # does not exist.  Seems like it should throw NotFound.
                pass  # The policy was deleted.  Create it below.

        if not updated:
            # The policy no longer exists.  Recreate it.
            old_name = policy.name
            del policy.name
            for condition in policy.conditions:
                del condition.name
            policy = alert_client.create_alert_policy(
                name=project_name, alert_policy=policy
            )
        print("Updated", policy.name)