按过滤条件删除快照

此示例会删除项目中符合过滤条件的所有快照。

代码示例

Go

试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Go 设置说明进行操作。 如需了解详情，请参阅 Compute Engine Go API 参考文档。

如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。

import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "cloud.google.com/go/compute/apiv1/computepb"
	"google.golang.org/api/iterator"
)

// Deletes ALL disk snapshots in the project that match the filter
func deleteByFilter(w io.Writer, projectID, filter string) error {
	// projectID := "your_project_id"
	// filter := ""
	// Learn more about filters:
	// https://cloud.google.com/python/docs/reference/compute/latest/google.cloud.compute_v1.types.ListSnapshotsRequest

	ctx := context.Background()
	snapshotsClient, err := compute.NewSnapshotsRESTClient(ctx)
	if err != nil {
		return fmt.Errorf("NewSnapshotsRESTClient: %w", err)
	}
	defer snapshotsClient.Close()

	// List snapshots in the project with the filter applied
	req := &computepb.ListSnapshotsRequest{
		Project: projectID,
		Filter:  &filter,
	}
	it := snapshotsClient.List(ctx, req)

	// Iterate over the list of snapshots
	for {
		snapshot, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return err
		}

		// Delete each snapshot that matches the filter
		req := &computepb.DeleteSnapshotRequest{
			Project:  projectID,
			Snapshot: *snapshot.Name,
		}

		op, err := snapshotsClient.Delete(ctx, req)
		if err != nil {
			return fmt.Errorf("unable to delete snapshot: %w", err)
		}

		if err = op.Wait(ctx); err != nil {
			return fmt.Errorf("unable to wait for the operation: %w", err)
		}

		fmt.Fprintf(w, "Snapshot %s deleted\n", *snapshot.Name)
	}
	return nil
}

Java

试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Java 设置说明进行操作。 如需了解详情，请参阅 Compute Engine Java API 参考文档。

如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。

package compute.disks;

import com.google.cloud.compute.v1.ListSnapshotsRequest;
import com.google.cloud.compute.v1.Operation;
import com.google.cloud.compute.v1.Operation.Status;
import com.google.cloud.compute.v1.Snapshot;
import com.google.cloud.compute.v1.SnapshotsClient;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class DeleteSnapshotsByFilter {

  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 Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Filter to be applied when looking for snapshots for deletion. Learn more about filters here:
    // https://cloud.google.com/java/docs/reference/google-cloud-compute/latest/com.google.cloud.compute.v1.ListSnapshotsRequest
    String filter = "FILTER";

    deleteSnapshotsByFilter(projectId, filter);
  }

  // Deletes all snapshots in project that meet the filter criteria.
  public static void deleteSnapshotsByFilter(String projectId, String filter)
      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. After completing all of your requests, call
    // the `snapshotsClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (SnapshotsClient snapshotsClient = SnapshotsClient.create()) {
      // Create the List Snapshot request.
      ListSnapshotsRequest listSnapshotsRequest = ListSnapshotsRequest.newBuilder()
          .setProject(projectId)
          .setFilter(filter)
          .build();

      // Iterate through the resultant snapshots and delete them.
      for (Snapshot snapshot : snapshotsClient.list(listSnapshotsRequest).iterateAll()) {
        Operation operation = snapshotsClient.deleteAsync(projectId, snapshot.getName())
            .get(3, TimeUnit.MINUTES);

        if (operation.hasError() || operation.getStatus() != Status.DONE) {
          throw new Error("Snapshot deletion failed!" + operation.getError());
        }
        System.out.printf("Snapshot deleted: %s", snapshot.getName());
      }
    }
  }
}

Python

试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Python 设置说明进行操作。 如需了解详情，请参阅 Compute Engine Python API 参考文档。

如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。

from __future__ import annotations

from collections.abc import Iterable
import sys
from typing import Any

from google.api_core.extended_operation import ExtendedOperation
from google.cloud import compute_v1


def wait_for_extended_operation(
    operation: ExtendedOperation, verbose_name: str = "operation", timeout: int = 300
) -> Any:
    """
    Waits for the extended (long-running) operation to complete.

    If the operation is successful, it will return its result.
    If the operation ends with an error, an exception will be raised.
    If there were any warnings during the execution of the operation
    they will be printed to sys.stderr.

    Args:
        operation: a long-running operation you want to wait on.
        verbose_name: (optional) a more verbose name of the operation,
            used only during error and warning reporting.
        timeout: how long (in seconds) to wait for operation to finish.
            If None, wait indefinitely.

    Returns:
        Whatever the operation.result() returns.

    Raises:
        This method will raise the exception received from `operation.exception()`
        or RuntimeError if there is no exception set, but there is an `error_code`
        set for the `operation`.

        In case of an operation taking longer than `timeout` seconds to complete,
        a `concurrent.futures.TimeoutError` will be raised.
    """
    result = operation.result(timeout=timeout)

    if operation.error_code:
        print(
            f"Error during {verbose_name}: [Code: {operation.error_code}]: {operation.error_message}",
            file=sys.stderr,
            flush=True,
        )
        print(f"Operation ID: {operation.name}", file=sys.stderr, flush=True)
        raise operation.exception() or RuntimeError(operation.error_message)

    if operation.warnings:
        print(f"Warnings during {verbose_name}:\n", file=sys.stderr, flush=True)
        for warning in operation.warnings:
            print(f" - {warning.code}: {warning.message}", file=sys.stderr, flush=True)

    return result


def delete_snapshot(project_id: str, snapshot_name: str) -> None:
    """
    Delete a snapshot of a disk.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        snapshot_name: name of the snapshot to delete.
    """

    snapshot_client = compute_v1.SnapshotsClient()
    operation = snapshot_client.delete(project=project_id, snapshot=snapshot_name)

    wait_for_extended_operation(operation, "snapshot deletion")


def list_snapshots(project_id: str, filter_: str = "") -> Iterable[compute_v1.Snapshot]:
    """
    List snapshots from a project.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        filter_: filter to be applied when listing snapshots. Learn more about filters here:
            https://cloud.google.com/python/docs/reference/compute/latest/google.cloud.compute_v1.types.ListSnapshotsRequest

    Returns:
        An iterable containing all Snapshots that match the provided filter.
    """

    snapshot_client = compute_v1.SnapshotsClient()
    request = compute_v1.ListSnapshotsRequest()
    request.project = project_id
    request.filter = filter_

    return snapshot_client.list(request)


def delete_snapshots_by_filter(project_id: str, filter: str):
    """
    Deletes all snapshots in project that meet the filter criteria.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        filter: filter to be applied when looking for snapshots for deletion.
    """
    for snapshot in list_snapshots(project_id, filter):
        delete_snapshot(project_id, snapshot.name)

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。