Configura eventos de estado personalizados para describir elementos ejecutables

En este documento, se explica cómo configurar eventos de estado personalizados, que describen los elementos ejecutables de un trabajo, cuando creas y ejecutas un trabajo por lotes de Batch. Para obtener información sobre los eventos de estado, consulta Cómo ver el historial de un trabajo a través de eventos de estado.

Los eventos de estado personalizados te permiten proporcionar detalles adicionales en el historial de una tarea sobre el progreso de sus elementos ejecutables, lo que puede ayudar a que un trabajo sea más fácil de analizar y solucionar problemas. Por ejemplo, puedes configurar eventos de estado personalizados que describan cuándo comienza un elemento ejecutable, cuándo finaliza, cuándo se alcanza un elemento ejecutable de barrera o cuándo ocurre un evento importante durante la progresión de tu código.

Antes de comenzar

  1. Si nunca usaste Batch, revisa Comienza a usar Batch y habilita Batch completando los requisitos previos para proyectos y usuarios.

  2. Para obtener los permisos que necesitas para crear un trabajo, pídele a tu administrador que te otorgue los siguientes roles de IAM:

    Para obtener más información sobre cómo otorgar roles, consulta Administra el acceso a proyectos, carpetas y organizaciones.

    También puedes obtener los permisos necesarios a través de roles personalizados o cualquier otro rol predefinido.

Configura eventos de estado personalizados

Configura eventos de estado personalizados con una o más de las siguientes opciones cuando estés creando un trabajo:

Describe el estado de un elemento ejecutable

Puedes configurar eventos de estado personalizados que describan el estado de un elemento ejecutable definiendo su nombre visible (displayName campo). Los eventos de estado personalizados resultantes varían ligeramente para los diferentes tipos de elementos ejecutables:

  • Si defines un nombre visible para un elemento ejecutable de contenedor o un elemento ejecutable de secuencia de comandos, Batch agrega automáticamente dos tipos de eventos de estado personalizados. El primer evento de estado personalizado indica cada vez que una tarea inicia este elemento ejecutable. El segundo evento de estado personalizado indica cada vez que una tarea finaliza este elemento ejecutable y el código de salida correspondiente .

  • Si defines un nombre visible para un elemento ejecutable de barrera, Batch agrega automáticamente un evento de estado personalizado que indica cada vez que una tarea alcanza esta barrera.

Para crear y ejecutar un trabajo con eventos de estado personalizados que describan el estado de un elemento ejecutable, define el campo displayName para uno o más elementos ejecutables con la gcloud CLI, la API de Batch o la biblioteca.

gcloud

Usa Google Cloud CLI para crear un trabajo que incluya el displayName campo en una o más definiciones de runnables en el archivo JSON:

...
"runnables": [
  {
    "displayName":DISPLAY_NAME,
    ...
  }
]
...

Por ejemplo, un trabajo con eventos de estado personalizados que describan el estado de cada elemento ejecutable puede tener un archivo de configuración JSON similar al siguiente:

{
  "taskGroups": [
    {
      "taskSpec": {
        "runnables": [
          {
            "displayName":"DISPLAY_NAME1",
            "script": {
              "text": "echo Hello world from script 1 for task ${BATCH_TASK_INDEX}"
            }
          },
          {
            "displayName":"DISPLAY_NAME2",
            "barrier": {}
          },
          {
            "displayName":"DISPLAY_NAME3",
            "script": {
              "text": "echo Hello world from script 2 for task ${BATCH_TASK_INDEX}"
            }
          }
        ]
      },
      "taskCount": 3
    }
  ],
  "logsPolicy": {
    "destination": "CLOUD_LOGGING"
  }
}

Reemplaza DISPLAY_NAME1, DISPLAY_NAME2 y DISPLAY_NAME3 por el nombre del elemento ejecutable, que debe ser único dentro del trabajo; por ejemplo, script 1, barrier 1 y script 2.

API

Usa la API de REST para crear un trabajo que incluya el displayName campo en una o más definiciones de runnables en el archivo JSON:

...
"runnables": [
  {
    "displayName":DISPLAY_NAME,
    ...
  }
]
...

Por ejemplo, un trabajo con eventos de estado personalizados que describan el estado de cada elemento ejecutable puede tener un archivo de configuración JSON similar al siguiente:

{
  "taskGroups": [
    {
      "taskSpec": {
        "runnables": [
          {
            "displayName":"DISPLAY_NAME1",
            "script": {
              "text": "echo Hello world from script 1 for task ${BATCH_TASK_INDEX}"
            }
          },
          {
            "displayName":"DISPLAY_NAME2",
            "barrier": {}
          },
          {
            "displayName":"DISPLAY_NAME3",
            "script": {
              "text": "echo Hello world from script 2 for task ${BATCH_TASK_INDEX}"
            }
          }
        ]
      },
      "taskCount": 3
    }
  ],
  "logsPolicy": {
    "destination": "CLOUD_LOGGING"
  }
}

Reemplaza DISPLAY_NAME1, DISPLAY_NAME2 y DISPLAY_NAME3 por el nombre del elemento ejecutable, que debe ser único dentro del trabajo; por ejemplo, script 1, barrier 1 y script 2.

Go 

import (
	"context"
	"fmt"
	"io"

	batch "cloud.google.com/go/batch/apiv1"
	"cloud.google.com/go/batch/apiv1/batchpb"
	durationpb "google.golang.org/protobuf/types/known/durationpb"
)

// Creates and runs a job with custom events
func createJobWithCustomEvents(w io.Writer, projectID, jobName string) (*batchpb.Job, error) {
	region := "us-central1"
	displayName1 := "script 1"
	displayName2 := "barrier 1"
	displayName3 := "script 2"

	ctx := context.Background()
	batchClient, err := batch.NewClient(ctx)
	if err != nil {
		return nil, fmt.Errorf("batchClient error: %w", err)
	}
	defer batchClient.Close()

	runn1 := &batchpb.Runnable{
		Executable: &batchpb.Runnable_Script_{
			Script: &batchpb.Runnable_Script{
				Command: &batchpb.Runnable_Script_Text{
					Text: "echo Hello world from script 1 for task ${BATCH_TASK_INDEX}",
				},
			},
		},
		DisplayName: displayName1,
	}

	runn2 := &batchpb.Runnable{
		Executable: &batchpb.Runnable_Barrier_{
			Barrier: &batchpb.Runnable_Barrier{},
		},
		DisplayName: displayName2,
	}

	runn3 := &batchpb.Runnable{
		Executable: &batchpb.Runnable_Script_{
			Script: &batchpb.Runnable_Script{
				Command: &batchpb.Runnable_Script_Text{
					Text: "echo Hello world from script 2 for task ${BATCH_TASK_INDEX}",
				},
			},
		},
		DisplayName: displayName3,
	}

	runn4 := &batchpb.Runnable{
		Executable: &batchpb.Runnable_Script_{
			Script: &batchpb.Runnable_Script{
				Command: &batchpb.Runnable_Script_Text{
					Text: "sleep 30; echo '{\"batch/custom/event\": \"DESCRIPTION\"}'; sleep 30",
				},
			},
		},
	}

	taskSpec := &batchpb.TaskSpec{
		ComputeResource: &batchpb.ComputeResource{
			// CpuMilli is milliseconds per cpu-second. This means the task requires 2 whole CPUs.
			CpuMilli:  2000,
			MemoryMib: 16,
		},
		MaxRunDuration: &durationpb.Duration{
			Seconds: 3600,
		},
		MaxRetryCount: 2,
		Runnables:     []*batchpb.Runnable{runn1, runn2, runn3, runn4},
	}

	taskGroups := []*batchpb.TaskGroup{
		{
			TaskCount: 4,
			TaskSpec:  taskSpec,
		},
	}

	labels := map[string]string{"env": "testing", "type": "container"}

	// Policies are used to define on what kind of virtual machines the tasks will run on.
	// In this case, we tell the system to use "e2-standard-4" machine type.
	// Read more about machine types here: https://cloud.google.com/compute/docs/machine-types
	allocationPolicy := &batchpb.AllocationPolicy{
		Instances: []*batchpb.AllocationPolicy_InstancePolicyOrTemplate{{
			PolicyTemplate: &batchpb.AllocationPolicy_InstancePolicyOrTemplate_Policy{
				Policy: &batchpb.AllocationPolicy_InstancePolicy{
					MachineType: "e2-standard-4",
				},
			},
		}},
	}

	// We use Cloud Logging as it's an out of the box available option
	logsPolicy := &batchpb.LogsPolicy{
		Destination: batchpb.LogsPolicy_CLOUD_LOGGING,
	}

	job := &batchpb.Job{
		Name:             jobName,
		TaskGroups:       taskGroups,
		AllocationPolicy: allocationPolicy,
		Labels:           labels,
		LogsPolicy:       logsPolicy,
	}

	request := &batchpb.CreateJobRequest{
		Parent: fmt.Sprintf("projects/%s/locations/%s", projectID, region),
		JobId:  jobName,
		Job:    job,
	}

	created_job, err := batchClient.CreateJob(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("unable to create job: %w", err)
	}

	fmt.Fprintf(w, "Job created: %v\n", created_job)
	return created_job, nil
}

Java 


import com.google.cloud.batch.v1.BatchServiceClient;
import com.google.cloud.batch.v1.CreateJobRequest;
import com.google.cloud.batch.v1.Job;
import com.google.cloud.batch.v1.LogsPolicy;
import com.google.cloud.batch.v1.LogsPolicy.Destination;
import com.google.cloud.batch.v1.Runnable;
import com.google.cloud.batch.v1.Runnable.Barrier;
import com.google.cloud.batch.v1.Runnable.Script;
import com.google.cloud.batch.v1.TaskGroup;
import com.google.cloud.batch.v1.TaskSpec;
import com.google.protobuf.Duration;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateBatchCustomEvent {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.
    // Project ID or project number of the Google Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";
    // Name of the region you want to use to run the job. Regions that are
    // available for Batch are listed on: https://cloud.google.com/batch/docs/get-started#locations
    String region = "europe-central2";
    // The name of the job that will be created.
    // It needs to be unique for each project and region pair.
    String jobName = "JOB_NAME";
    // Name of the runnable, which must be unique
    // within the job. For example: script 1, barrier 1, and script 2.
    String displayName1 = "script 1";
    String displayName2 = "barrier 1";
    String displayName3 = "script 2";

    createBatchCustomEvent(projectId, region, jobName, displayName1, displayName2, displayName3);
  }

  // Configure custom status events, which describe a job's runnables,
  // when you create and run a Batch job.
  public static Job createBatchCustomEvent(String projectId, String region, String jobName,
                                           String displayName1, String displayName2,
                                           String displayName3)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests.
    try (BatchServiceClient batchServiceClient = BatchServiceClient.create()) {
      TaskSpec task = TaskSpec.newBuilder()
              // Jobs can be divided into tasks. In this case, we have only one task.
              .addAllRunnables(buildRunnables(displayName1, displayName2, displayName3))
              .setMaxRetryCount(2)
              .setMaxRunDuration(Duration.newBuilder().setSeconds(3600).build())
              .build();

      // Tasks are grouped inside a job using TaskGroups.
      // Currently, it's possible to have only one task group.
      TaskGroup taskGroup = TaskGroup.newBuilder()
          .setTaskCount(3)
          .setParallelism(3)
          .setTaskSpec(task)
          .build();

      Job job =
          Job.newBuilder()
              .addTaskGroups(taskGroup)
              .putLabels("env", "testing")
              .putLabels("type", "script")
              // We use Cloud Logging as it's an out of the box available option.
              .setLogsPolicy(
                  LogsPolicy.newBuilder().setDestination(Destination.CLOUD_LOGGING))
              .build();

      CreateJobRequest createJobRequest =
          CreateJobRequest.newBuilder()
              // The job's parent is the region in which the job will run.
              .setParent(String.format("projects/%s/locations/%s", projectId, region))
              .setJob(job)
              .setJobId(jobName)
              .build();

      Job result =
          batchServiceClient
              .createJobCallable()
              .futureCall(createJobRequest)
              .get(5, TimeUnit.MINUTES);

      System.out.printf("Successfully created the job: %s", result.getName());

      return result;
    }
  }

  // Create runnables with custom scripts
  private static Iterable<Runnable> buildRunnables(String displayName1, String displayName2,
                                                   String displayName3) {
    List<Runnable> runnables = new ArrayList<>();

    // Define what will be done as part of the job.
    runnables.add(Runnable.newBuilder()
        .setDisplayName(displayName1)
        .setScript(
            Script.newBuilder()
                .setText(
                    "echo Hello world from script 1 for task ${BATCH_TASK_INDEX}")
                // You can also run a script from a file. Just remember, that needs to be a
                // script that's already on the VM that will be running the job.
                // Using setText() and setPath() is mutually exclusive.
                // .setPath("/tmp/test.sh")
                )
        .build());

    runnables.add(Runnable.newBuilder()
            .setDisplayName(displayName2)
            .setBarrier(Barrier.newBuilder())
            .build());

    runnables.add(Runnable.newBuilder()
        .setDisplayName(displayName3)
        .setScript(
            Script.newBuilder()
                .setText("echo Hello world from script 2 for task ${BATCH_TASK_INDEX}"))
        .build());

    runnables.add(Runnable.newBuilder()
        .setScript(
            Script.newBuilder()
                // Replace DESCRIPTION with a description
                // for the custom status event—for example, halfway done.
                .sesetTextsleep 30; echo '{\"batch/custom/event\": \"DESCRIPTION\"}'; sleep 30"))
        .build());

    return runnables;
  }
}

Node.js 

// Imports the Batch library
const batchLib = require('@google-cloud/batch');
const batch = batchLib.protos.google.cloud.batch.v1;

// Instantiates a client
const batchClient = new batchLib.v1.BatchServiceClient();

/**
 * TODO(developer): Update these variables before running the sample.
 */
// Project ID or project number of the Google Cloud project you want to use.
const projectId = await batchClient.getProjectId();
// Name of the region you want to use to run the job. Regions that are
// available for Batch are listed on: https://cloud.google.com/batch/docs/get-started#locations
const region = 'europe-central2';
// The name of the job that will be created.
// It needs to be unique for each project and region pair.
const jobName = 'batch-custom-events-job';
// Name of the runnable, which must be unique
// within the job. For example: script 1, barrier 1, and script 2.
const displayName1 = 'script 1';
const displayName2 = 'barrier 1';
const displayName3 = 'script 2';

// Create runnables with custom scripts
const runnable1 = new batch.Runnable({
  displayName: displayName1,
  script: new batch.Runnable.Script({
    commands: [
      '-c',
      'echo Hello world from script 1 for task ${BATCH_TASK_INDEX}.',
    ],
  }),
});

const runnable2 = new batch.Runnable({
  displayName: displayName2,
  barrier: new batch.Runnable.Barrier(),
});

const runnable3 = new batch.Runnable({
  displayName: displayName3,
  script: new batch.Runnable.Script({
    // Replace DESCRIPTION with a description
    // for the custom status event—for example, halfway done.
    commands: [
      'sleep 30; echo \'{"batch/custom/event": "DESCRIPTION"}\'; sleep 30',
    ],
  }),
});

const task = new batch.TaskSpec({
  runnables: [runnable1, runnable2, runnable3],
  maxRetryCount: 2,
  maxRunDuration: {seconds: 3600},
});

// Tasks are grouped inside a job using TaskGroups.
const group = new batch.TaskGroup({
  taskCount: 3,
  taskSpec: task,
});

const job = new batch.Job({
  name: jobName,
  taskGroups: [group],
  labels: {env: 'testing', type: 'script'},
  // We use Cloud Logging as it's an option available out of the box
  logsPolicy: new batch.LogsPolicy({
    destination: batch.LogsPolicy.Destination.CLOUD_LOGGING,
  }),
});
// The job's parent is the project and region in which the job will run
const parent = `projects/${projectId}/locations/${region}`;

async function callCreateBatchCustomEvents() {
  // Construct request
  const request = {
    parent,
    jobId: jobName,
    job,
  };

  // Run request
  const [response] = await batchClient.createJob(request);
  console.log(JSON.stringify(response));
}

await callCreateBatchCustomEvents();

Python 

from google.cloud import batch_v1


def create_job_with_status_events(
    project_id: str, region: str, job_name: str
) -> batch_v1.Job:
    """
    This method shows the creation of a Batch job with custom status events which describe runnables
    Within the method, the state of a runnable is described by defining its display name.
    The script text is modified to change the commands that are executed, and barriers are adjusted
    to synchronize tasks at specific points.

    Args:
        project_id (str): project ID or project number of the Cloud project you want to use.
        region (str): name of the region you want to use to run the job. Regions that are
            available for Batch are listed on: https://cloud.google.com/batch/docs/locations
        job_name (str): the name of the job that will be created.
            It needs to be unique for each project and region pair.

    Returns:
        A job object representing the job created with additional runnables and custom events.
    """
    client = batch_v1.BatchServiceClient()

    # Executes a simple script that prints a message.
    runn1 = batch_v1.Runnable()
    runn1.display_name = "Script 1"
    runn1.script.text = "echo Hello world from Script 1 for task ${BATCH_TASK_INDEX}"

    # Acts as a barrier to synchronize the execution of subsequent runnables.
    runn2 = batch_v1.Runnable()
    runn2.display_name = "Barrier 1"
    runn2.barrier = batch_v1.Runnable.Barrier({"name": "hello-barrier"})

    # Executes another script that prints a message, intended to run after the barrier.
    runn3 = batch_v1.Runnable()
    runn3.display_name = "Script 2"
    runn3.script.text = "echo Hello world from Script 2 for task ${BATCH_TASK_INDEX}"

    # Executes a script that imitates a delay and creates a custom event for monitoring purposes.
    runn4 = batch_v1.Runnable()
    runn4.script.text = (
        'sleep 30; echo \'{"batch/custom/event": "EVENT_DESCRIPTION"}\'; sleep 30'
    )

    # Jobs can be divided into tasks. In this case, we have only one task.
    task = batch_v1.TaskSpec()
    # Assigning a list of runnables to the task.
    task.runnables = [runn1, runn2, runn3, runn4]

    # We can specify what resources are requested by each task.
    resources = batch_v1.ComputeResource()
    resources.cpu_milli = 2000  # in milliseconds per cpu-second. This means the task requires 2 whole CPUs.
    resources.memory_mib = 16  # in MiB
    task.compute_resource = resources

    task.max_retry_count = 2
    task.max_run_duration = "3600s"

    # Tasks are grouped inside a job using TaskGroups.
    # Currently, it's possible to have only one task group.
    group = batch_v1.TaskGroup()

    group.task_count = 4
    group.task_spec = task

    # Policies are used to define on what kind of virtual machines the tasks will run on.
    # In this case, we tell the system to use "e2-standard-4" machine type.
    # Read more about machine types here: https://cloud.google.com/compute/docs/machine-types
    policy = batch_v1.AllocationPolicy.InstancePolicy()
    policy.machine_type = "e2-standard-4"
    instances = batch_v1.AllocationPolicy.InstancePolicyOrTemplate()
    instances.policy = policy
    allocation_policy = batch_v1.AllocationPolicy()
    allocation_policy.instances = [instances]

    job = batch_v1.Job()
    job.task_groups = [group]
    job.allocation_policy = allocation_policy
    job.labels = {"env": "testing", "type": "container"}
    # We use Cloud Logging as it's an out of the box available option
    job.logs_policy = batch_v1.LogsPolicy()
    job.logs_policy.destination = batch_v1.LogsPolicy.Destination.CLOUD_LOGGING

    create_request = batch_v1.CreateJobRequest()
    create_request.job = job
    create_request.job_id = job_name
    # The job's parent is the region in which the job will run
    create_request.parent = f"projects/{project_id}/locations/{region}"

    return client.create_job(create_request)

Una vez que finaliza la ejecución del trabajo de ejemplo, los eventos de estado personalizados resultantes para cada tarea son similares a los siguientes:

statusEvents:
  ...
  - description: 'script at index #0 with display name [DISPLAY_NAME1] started.'
    eventTime: '...'
    type: RUNNABLE_EVENT
  - description: 'script at index #0 with display name [DISPLAY_NAME1] finished with exit
      code 0.'
    eventTime: '...'
    type: RUNNABLE_EVENT
  - description: 'barrier at index #2 with display name [DISPLAY_NAME2] reached.'
    eventTime: '...'
    type: BARRIER_REACHED_EVENT
  - description: 'script at index #2 with display name [DISPLAY_NAME3] started.'
    eventTime: '...'
    type: RUNNABLE_EVENT
  - description: 'script at index #2 with display name [DISPLAY_NAME3] finished with exit
      code 0.'
    eventTime: '...'
    type: RUNNABLE_EVENT
  ...

Indica eventos importantes del tiempo de ejecución

Puedes configurar eventos de estado personalizados que indiquen cuándo ocurre un evento importante mientras se ejecuta un elemento ejecutable. Para ello, configura ese elemento ejecutable para que escriba un registro de tareas estructurado que defina una cadena para el campo de evento de estado personalizado de Batch (batch/custom/event).

Si un elemento ejecutable de contenedor o un elemento ejecutable de secuencia de comandos escribe un registro de tareas estructurado que define el campo JSON batch/custom/event, produce un evento de estado personalizado en ese momento. Aunque puedes configurar el registro de tareas estructurado para que incluya campos adicionales, el evento de estado personalizado solo incluye la cadena para el campo batch/custom/event.

Para crear y ejecutar un trabajo con eventos de estado personalizados que indiquen cuándo ocurre un evento importante, configura uno o más elementos ejecutables para que escriban un registro estructurado imprimiendo JSON y define el batch/custom/event campo como parte del registro.

...
"runnables": [
  {
    ...
    "echo '{\"batch/custom/event\":\"EVENT_DESCRIPTION\"}'"
    ...
  }
]
...
"logsPolicy": {
  "destination": "CLOUD_LOGGING"
}
...

Por ejemplo, un trabajo con eventos de estado personalizados que indiquen cuándo ocurre un evento importante puede tener un archivo de configuración JSON similar al siguiente:

{
  "taskGroups": [
    {
      "taskSpec": {
        "runnables": [
          {
            "script": {
              "text": "sleep 30; echo '{\"batch/custom/event\": \"EVENT_DESCRIPTION\"}'; sleep 30"
            }
          }
        ]
      },
      "taskCount": 3
    }
  ],
  "logsPolicy": {
    "destination": "CLOUD_LOGGING"
  }
}

Reemplaza EVENT_DESCRIPTION por una descripción del evento de estado personalizado; por ejemplo, halfway done.

Una vez que finaliza la ejecución del trabajo de ejemplo, el evento de estado personalizado resultante para cada tarea es similar al siguiente:

statusEvents:
  ...
  - description: EVENT_DESCRIPTION
    eventTime: '...'
    type: RUNNABLE_CUSTOM_EVENT
  ...

¿Qué sigue?