依篩選條件刪除快照

這個範例會刪除專案中符合篩選條件的所有快照。

程式碼範例

Go

在試用這個範例之前，請先按照Go「使用用戶端程式庫的 Compute Engine 快速入門」中的操作說明進行設定。詳情請參閱 Compute Engine Go API 參考說明文件。

如要向 Compute Engine 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

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

在試用這個範例之前，請先按照Java「使用用戶端程式庫的 Compute Engine 快速入門」中的操作說明進行設定。詳情請參閱 Compute Engine Java API 參考說明文件。

如要向 Compute Engine 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

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

在試用這個範例之前，請先按照Python「使用用戶端程式庫的 Compute Engine 快速入門」中的操作說明進行設定。詳情請參閱 Compute Engine Python API 參考說明文件。

如要向 Compute Engine 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

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)

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。