Menghapus Snapshot

Contoh kode Java berikut mencantumkan snapshot untuk setiap volume gateway dan apakah waktu mulai snapshot sebelum atau sesudah tanggal yang ditentukan. Ini menggunakan AWS SDK for Java API untuk Storage Gateway dan Amazon EC2. Amazon EC2 API mencakup operasi untuk bekerja dengan snapshot.

Perbarui kode untuk menyediakan titik akhir layanan, nama sumber daya Amazon gateway Anda (ARN), dan jumlah hari yang lalu Anda ingin menyimpan snapshot. Snapshot yang diambil sebelum cutoff ini dihapus. Anda juga perlu menentukan nilai BooleanviewOnly, yang menunjukkan apakah Anda ingin melihat snapshot yang akan dihapus atau benar-benar melakukan penghapusan snapshot. Jalankan kode terlebih dahulu hanya dengan opsi tampilan (yaitu, dengan viewOnly set ketrue) untuk melihat apa yang dihapus kode. Untuk daftar endpoint AWS layanan yang dapat Anda gunakan dengan Storage Gateway, lihat AWS Storage Gateway Endpoints dan Quotas di. Referensi Umum AWS

import java.io.IOException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

import com.amazonaws.auth.PropertiesCredentials;
import com.amazonaws.services.ec2.AmazonEC2Client;
import com.amazonaws.services.ec2.model.DeleteSnapshotRequest;
import com.amazonaws.services.ec2.model.DescribeSnapshotsRequest;
import com.amazonaws.services.ec2.model.DescribeSnapshotsResult;
import com.amazonaws.services.ec2.model.Filter;
import com.amazonaws.services.ec2.model.Snapshot;
import com.amazonaws.services.storagegateway.AWSStorageGatewayClient;
import com.amazonaws.services.storagegateway.model.ListVolumesRequest;
import com.amazonaws.services.storagegateway.model.ListVolumesResult;
import com.amazonaws.services.storagegateway.model.VolumeInfo;

public class ListDeleteVolumeSnapshotsExample {

    public static AWSStorageGatewayClient sgClient;
    public static AmazonEC2Client ec2Client;    
    static String serviceURLSG = "https://storagegateway.us-east-1.amazonaws.com";
    static String serviceURLEC2 = "https://ec2.us-east-1.amazonaws.com"; 
    
    // The gatewayARN
    public static String gatewayARN = "*** provide gateway ARN ***";
    
    // The number of days back you want to save snapshots. Snapshots before this cutoff are deleted
    // if viewOnly = false.
    public static int daysBack = 10;
    
    // true = show what will be deleted; false = actually delete snapshots that meet the daysBack criteria
    public static boolean viewOnly = true;

    public static void main(String[] args) throws IOException {

        // Create a Storage Gateway and amazon ec2 client
        sgClient = new AWSStorageGatewayClient(new PropertiesCredentials(
                ListDeleteVolumeSnapshotsExample.class.getResourceAsStream("AwsCredentials.properties")));    
        sgClient.setEndpoint(serviceURLSG);
        
        ec2Client = new AmazonEC2Client(new PropertiesCredentials(
                ListDeleteVolumeSnapshotsExample.class.getResourceAsStream("AwsCredentials.properties")));
        ec2Client.setEndpoint(serviceURLEC2);        
        
        List<VolumeInfo> volumes = ListVolumesForGateway();
        DeleteSnapshotsForVolumes(volumes, daysBack);        
        
    }
    public static List<VolumeInfo> ListVolumesForGateway()
    {
        List<VolumeInfo> volumes = new ArrayList<VolumeInfo>();

        String marker = null;
        do {
            ListVolumesRequest request = new ListVolumesRequest().withGatewayARN(gatewayARN);
            ListVolumesResult result = sgClient.listVolumes(request);
            marker = result.getMarker();
            
            for (VolumeInfo vi : result.getVolumeInfos())
            {
                volumes.add(vi);
                System.out.println(OutputVolumeInfo(vi));
            }           
        } while (marker != null);

        return volumes;
    }
    private static void DeleteSnapshotsForVolumes(List<VolumeInfo> volumes,
            int daysBack2) {
        
        // Find snapshots and delete for each volume 
        for (VolumeInfo vi : volumes) {
            
            String volumeARN = vi.getVolumeARN();
            String volumeId = volumeARN.substring(volumeARN.lastIndexOf("/")+1).toLowerCase();
            Collection<Filter> filters = new ArrayList<Filter>();
            Filter filter = new Filter().withName("volume-id").withValues(volumeId);
            filters.add(filter);
            
            DescribeSnapshotsRequest describeSnapshotsRequest =
                new DescribeSnapshotsRequest().withFilters(filters);
            DescribeSnapshotsResult describeSnapshotsResult =
                ec2Client.describeSnapshots(describeSnapshotsRequest);
            
            List<Snapshot> snapshots = describeSnapshotsResult.getSnapshots();
            System.out.println("volume-id = " + volumeId);
            for (Snapshot s : snapshots){
                StringBuilder sb = new StringBuilder();
                boolean meetsCriteria = !CompareDates(daysBack, s.getStartTime());
                sb.append(s.getSnapshotId() + ", " + s.getStartTime().toString());                
                sb.append(", meets criteria for delete? " + meetsCriteria);
                sb.append(", deleted? ");
                if (!viewOnly & meetsCriteria) {
                    sb.append("yes");
                    DeleteSnapshotRequest deleteSnapshotRequest = 
                        new DeleteSnapshotRequest().withSnapshotId(s.getSnapshotId());
                    ec2Client.deleteSnapshot(deleteSnapshotRequest);
                }
                else {
                    sb.append("no");
                }
                System.out.println(sb.toString());                    
            }        
        }
    }

    private static String OutputVolumeInfo(VolumeInfo vi) {
        
        String volumeInfo = String.format(
                 "Volume Info:\n" + 
                 "  ARN: %s\n" +
                 "  Type: %s\n",
                 vi.getVolumeARN(),
                 vi.getVolumeType());
        return volumeInfo; 
     }
    
    // Returns the date in two formats as a list
    public static boolean CompareDates(int daysBack, Date snapshotDate) {
        Date today = new Date();
        Calendar cal = new GregorianCalendar();
        cal.setTime(today);
        cal.add(Calendar.DAY_OF_MONTH, -daysBack);
        Date cutoffDate = cal.getTime();        
        return (snapshotDate.compareTo(cutoffDate) > 0) ? true : false;
    }

}

Dalam contoh kode C # berikut, AWS Identity and Access Management pengguna dapat membuat daftar snapshot untuk setiap volume gateway. Pengguna kemudian dapat menentukan apakah waktu mulai snapshot sebelum atau setelah tanggal tertentu (periode retensi) dan menghapus snapshot yang telah melewati periode retensi. Contoh menggunakan AWS SDK for .NET API untuk Storage Gateway dan Amazon EC2. Amazon EC2 API mencakup operasi untuk bekerja dengan snapshot.

Contoh kode berikut menggunakan AWS SDK for .NET versi 2 dan 3. Anda dapat memigrasikan versi.NET yang lebih lama ke versi yang lebih baru. Untuk informasi selengkapnya, lihat Memigrasi Kode Anda ke Versi Terbaru AWS SDK for .NET.

Perbarui kode untuk menyediakan titik akhir layanan, nama sumber daya Amazon gateway Anda (ARN), dan jumlah hari yang lalu Anda ingin menyimpan snapshot. Snapshot yang diambil sebelum cutoff ini dihapus. Anda juga perlu menentukan nilai BooleanviewOnly, yang menunjukkan apakah Anda ingin melihat snapshot yang akan dihapus atau benar-benar melakukan penghapusan snapshot. Jalankan kode terlebih dahulu hanya dengan opsi tampilan (yaitu, dengan viewOnly set ketrue) untuk melihat apa yang dihapus kode. Untuk daftar endpoint AWS layanan yang dapat Anda gunakan dengan Storage Gateway, lihat AWS Storage Gateway Endpoints dan Quotas di. Referensi Umum AWS

Pertama, Anda membuat pengguna dan melampirkan kebijakan IAM minimum ke pengguna. Kemudian Anda menjadwalkan snapshot otomatis untuk gateway Anda.

Kode berikut membuat kebijakan minimum yang memungkinkan pengguna menghapus snapshot. Dalam contoh ini, kebijakan diberi namasgw-delete-snapshot.

{
      "Version": "2012-10-17",
      "Statement": [
          {
              "Sid": "StmtEC2Snapshots",
              "Effect": "Allow",
              "Action": [
                  "ec2:DeleteSnapshot",
                  "ec2:DescribeSnapshots"
              ],
              "Resource": [
                  "*"
              ]
          },
          {
              "Sid": "StmtSgwListVolumes",
              "Effect": "Allow",
              "Action": [
                  "storagegateway:ListVolumes"
              ],
              "Resource": [
                  "*"
              ]
          }
      ]
  }

Kode C# berikut menemukan semua snapshot di gateway yang ditentukan yang cocok dengan volume dan periode cut-off yang ditentukan dan kemudian menghapusnya.

using System;
using System.Collections.Generic;
using System.Text;
using Amazon.EC2;
using Amazon.EC2.Model;
using Amazon.StorageGateway.Model;
using Amazon.StorageGateway;

namespace DeleteStorageGatewaySnapshotNS
{
    class Program
    {
        /*
         * Replace the variables below to match your environment.
         */
         
         /* IAM AccessKey */
        static String AwsAccessKey = "AKIA................";
        
        /* IAM SecretKey */
        static String AwsSecretKey = "*******************************";
        
        /* Account number, 12 digits, no hyphen */
        static String OwnerID = "123456789012";
        
        /* Your Gateway ARN. Use a Storage Gateway ID, sgw-XXXXXXXX* */ 
        static String GatewayARN = "arn:aws:storagegateway:ap-southeast-2:123456789012:gateway/sgw-XXXXXXXX";
        
        /* Snapshot status: "completed", "pending", "error" */                                                                                                      
        static String SnapshotStatus = "completed";
        
        /* Region where your gateway is activated */ 
        static String AwsRegion = "ap-southeast-2";
        
        /* Minimum age of snapshots before they are deleted (retention policy) */
        static int daysBack = 30; 

        /*
         * Do not modify the four lines below.
         */
        static AmazonEC2Config ec2Config;
        static AmazonEC2Client ec2Client;
        static AmazonStorageGatewayClient sgClient;
        static AmazonStorageGatewayConfig sgConfig;

        static void Main(string[] args)
        {
            // Create an EC2 client.
            ec2Config = new AmazonEC2Config();
            ec2Config.ServiceURL = "https://ec2." + AwsRegion + ".amazonaws.com";
            ec2Client = new AmazonEC2Client(AwsAccessKey, AwsSecretKey, ec2Config);

            // Create a Storage Gateway client.
            sgConfig = new AmazonStorageGatewayConfig();
            sgConfig.ServiceURL = "https://storagegateway." + AwsRegion + ".amazonaws.com";
            sgClient = new AmazonStorageGatewayClient(AwsAccessKey, AwsSecretKey, sgConfig);

            List<VolumeInfo> StorageGatewayVolumes = ListVolumesForGateway();
            List<Snapshot> StorageGatewaySnapshots = ListSnapshotsForVolumes(StorageGatewayVolumes, 
                                                     daysBack);
            DeleteSnapshots(StorageGatewaySnapshots);
        }

        /*
         * List all volumes for your gateway
         * returns: A list of VolumeInfos, or null.
         */
        private static List<VolumeInfo> ListVolumesForGateway()
        {
            ListVolumesResponse response = new ListVolumesResponse();
            try
            {
                ListVolumesRequest request = new ListVolumesRequest();
                request.GatewayARN = GatewayARN;
                response = sgClient.ListVolumes(request);

                foreach (VolumeInfo vi in response.VolumeInfos)
                {
                    Console.WriteLine(OutputVolumeInfo(vi));
                }
            }
            catch (AmazonStorageGatewayException ex)
            {
                Console.WriteLine(ex.Message);
            }
            return response.VolumeInfos;
        }

        /*
         * Gets the list of snapshots that match the requested volumes
         * and cutoff period.
         */
        private static List<Snapshot> ListSnapshotsForVolumes(List<VolumeInfo> volumes, int snapshotAge)
        {
            List<Snapshot> SelectedSnapshots = new List<Snapshot>();
            try
            {
                foreach (VolumeInfo vi in volumes)
                {
                    String volumeARN = vi.VolumeARN;
                    String volumeID = volumeARN.Substring(volumeARN.LastIndexOf("/") + 1).ToLower();

                    DescribeSnapshotsRequest describeSnapshotsRequest = new DescribeSnapshotsRequest();

                    Filter ownerFilter = new Filter();
                    List<String> ownerValues = new List<String>();
                    ownerValues.Add(OwnerID);
                    ownerFilter.Name = "owner-id";
                    ownerFilter.Values = ownerValues;
                    describeSnapshotsRequest.Filters.Add(ownerFilter);

                    Filter statusFilter = new Filter();
                    List<String> statusValues = new List<String>();
                    statusValues.Add(SnapshotStatus);
                    statusFilter.Name = "status";
                    statusFilter.Values = statusValues;
                    describeSnapshotsRequest.Filters.Add(statusFilter);

                    Filter volumeFilter = new Filter();
                    List<String> volumeValues = new List<String>();
                    volumeValues.Add(volumeID);
                    volumeFilter.Name = "volume-id";
                    volumeFilter.Values = volumeValues;
                    describeSnapshotsRequest.Filters.Add(volumeFilter);

                    DescribeSnapshotsResponse describeSnapshotsResponse = 
                      ec2Client.DescribeSnapshots(describeSnapshotsRequest);

                    List<Snapshot> snapshots = describeSnapshotsResponse.Snapshots;
                    Console.WriteLine("volume-id = " + volumeID);
                    foreach (Snapshot s in snapshots)
                    {
                        if (IsSnapshotPastRetentionPeriod(snapshotAge, s.StartTime))
                        {
                            Console.WriteLine(s.SnapshotId + ", " + s.VolumeId + ", 
                               " + s.StartTime + ", " + s.Description);
                            SelectedSnapshots.Add(s);
                        }
                    }
                }
            }
            catch (AmazonEC2Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            return SelectedSnapshots;
        }

        /*
         * Deletes a list of snapshots.
         */
        private static void DeleteSnapshots(List<Snapshot> snapshots)
        {
            try
            {
                foreach (Snapshot s in snapshots)
                {

                    DeleteSnapshotRequest deleteSnapshotRequest = new DeleteSnapshotRequest(s.SnapshotId);
                    DeleteSnapshotResponse response = ec2Client.DeleteSnapshot(deleteSnapshotRequest);
                    Console.WriteLine("Volume: " +
                              s.VolumeId +
                              " => Snapshot: " +
                              s.SnapshotId +
                              " Response: "
                              + response.HttpStatusCode.ToString());
                }
            }
            catch (AmazonEC2Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        /*
         * Checks if the snapshot creation date is past the retention period.
         */
        private static Boolean IsSnapshotPastRetentionPeriod(int daysBack, DateTime snapshotDate)
        {
            DateTime cutoffDate = DateTime.Now.Add(new TimeSpan(-daysBack, 0, 0, 0));
            return (DateTime.Compare(snapshotDate, cutoffDate) < 0) ? true : false;
        }

        /*
         * Displays information related to a volume.
         */
        private static String OutputVolumeInfo(VolumeInfo vi)
        {
            String volumeInfo = String.Format(
                "Volume Info:\n" +
                "  ARN: {0}\n" +
                "  Type: {1}\n",
                vi.VolumeARN,
                vi.VolumeType);
            return volumeInfo;
        }
    }
}

Contoh PowerShell skrip berikut mencantumkan snapshot untuk setiap volume gateway dan apakah waktu mulai snapshot sebelum atau sesudah tanggal yang ditentukan. Ini menggunakan AWS Tools for Windows PowerShell cmdlet untuk Storage Gateway dan Amazon EC2. Amazon EC2 API mencakup operasi untuk bekerja dengan snapshot.

Anda perlu memperbarui skrip dan memberikan gateway Anda Nama Sumber Daya Amazon (ARN) dan jumlah hari yang lalu Anda ingin menyimpan snapshot. Snapshot yang diambil sebelum cutoff ini dihapus. Anda juga perlu menentukan nilai BooleanviewOnly, yang menunjukkan apakah Anda ingin melihat snapshot yang akan dihapus atau benar-benar melakukan penghapusan snapshot. Jalankan kode terlebih dahulu hanya dengan opsi tampilan (yaitu, dengan viewOnly set ketrue) untuk melihat apa yang dihapus kode.

<#
.DESCRIPTION
    Delete snapshots of a specified volume that match given criteria.
    
.NOTES
    PREREQUISITES:
    1) AWS Tools for Windows PowerShell from https://aws.amazon.com/powershell/
    2) Credentials and AWS Region stored in session using Initialize-AWSDefault.
    For more info see, https://docs.aws.amazon.com/powershell/latest/userguide/specifying-your-aws-credentials.html 

.EXAMPLE
    powershell.exe .\SG_DeleteSnapshots.ps1  
#>

# Criteria to use to filter the results returned.
$daysBack = 18
$gatewayARN = "*** provide gateway ARN ***"
$viewOnly = $true;

#ListVolumes
$volumesResult = Get-SGVolume -GatewayARN $gatewayARN
$volumes = $volumesResult.VolumeInfos
Write-Output("`nVolume List")
foreach ($volumes in $volumesResult)
  { Write-Output("`nVolume Info:")
    Write-Output("ARN:  " + $volumes.VolumeARN)
    write-Output("Type: " + $volumes.VolumeType)
  }

Write-Output("`nWhich snapshots meet the criteria?")
foreach ($volume in $volumesResult)
  { 
    $volumeARN = $volume.VolumeARN
    
    $volumeId = ($volumeARN-split"/")[3].ToLower()
  
    $filter = New-Object Amazon.EC2.Model.Filter
    $filter.Name = "volume-id"
    $filter.Value.Add($volumeId)
    
    $snapshots = get-EC2Snapshot -Filter $filter    
    Write-Output("`nFor volume-id = " + $volumeId)
    foreach ($s in $snapshots)
    {
       $d = ([DateTime]::Now).AddDays(-$daysBack)
       $meetsCriteria = $false
       if ([DateTime]::Compare($d, $s.StartTime) -gt 0)
       {
            $meetsCriteria = $true
       }
       
       $sb = $s.SnapshotId + ", " + $s.StartTime + ", meets criteria for delete? " + $meetsCriteria
       if (!$viewOnly -AND $meetsCriteria) 
       {
           $resp = Remove-EC2Snapshot -SnapshotId $s.SnapshotId
           #Can get RequestId from response for troubleshooting.
           $sb = $sb + ", deleted? yes"
       }
       else {
           $sb = $sb + ", deleted? no"
       }
       Write-Output($sb) 
    }
  }