【AWS】Amazon DynamoDBを使ってみる(CLI、API)

AWS

1. 概要

前回はAmazon DynamoDBを「AWS Management Console」で操作する内容でした。今回は「DynamoDB API」で操作する内容となります。

次回は「PartiQL for DynamoDB」で操作する内容を予定してます。

2. AWSアカウントにサインアップ

2-1. 前提条件

3. AWSアクセスキーの取得

3-1. AWSアクセスキーの取得

4. AWS CLI のインストール

AWS Command Line Interface とはどのようなものですか。 – AWS Command Line Interface (amazon.com)

4-1. インストール

curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install

4-2. 確認

aws --version

4-3. 設定

aws configure
AWS Access Key ID [None]: 上記3にて取得したもの
AWS Secret Access Key [None]: 上記3にて取得したもの
Default region name [None]: ap-northeast-1
Default output format [None]: json

5. テーブルを作成

5-1. テーブルを作成

【公式】Amazon DynamoDBとは(マネージド NoSQL データベース)| AWS

  • 下記を入力し、作成
    • テーブル名
      • Music
    • パーディションキー
      • Artist
    • ソートキー
      • SongTitle
aws dynamodb create-table \
    --table-name Music \
    --attribute-definitions \
        AttributeName=Artist,AttributeType=S \
        AttributeName=SongTitle,AttributeType=S \
    --key-schema \
        AttributeName=Artist,KeyType=HASH \
        AttributeName=SongTitle,KeyType=RANGE \
    --provisioned-throughput \
        ReadCapacityUnits=5,WriteCapacityUnits=5 \
    --table-class STANDARD
{
    "TableDescription": {
        "AttributeDefinitions": [
            {
                "AttributeName": "Artist",
                "AttributeType": "S"
            },
            {
                "AttributeName": "SongTitle",
                "AttributeType": "S"
            }
        ],
        "TableName": "Music",
        "KeySchema": [
            {
                "AttributeName": "Artist",
                "KeyType": "HASH"
            },
            {
                "AttributeName": "SongTitle",
                "KeyType": "RANGE"
            }
        ],
        "TableStatus": "CREATING",
        "CreationDateTime": "2024-04-27T10:15:35.266000+09:00",
        "ProvisionedThroughput": {
            "NumberOfDecreasesToday": 0,
            "ReadCapacityUnits": 5,
            "WriteCapacityUnits": 5
        },
        "TableSizeBytes": 0,
        "ItemCount": 0,
        "TableArn": "arn:aws:dynamodb:ap-northeast-1:123456789012:table/Music",
        "TableId": "5ec519df-c7af-4d3f-87c1-9d21eb872609",
        "TableClassSummary": {
            "TableClass": "STANDARD"
        },
        "DeletionProtectionEnabled": false
    }
}

※TableStatusが「CREATING」⇒「ACTIVE」となる事を確認

aws dynamodb describe-table --table-name Music | grep TableStatus

6. データの書き込み

6-1. データの書き込み

  • データを4つ(4レコード)作成

aws dynamodb put-item \
    --table-name Music  \
    --item \
        '{"Artist": {"S": "No One You Know"}, "SongTitle": {"S": "Call Me Today"}, "AlbumTitle": {"S": "Somewhat Famous"}, "Awards": {"N": "1"}}'

aws dynamodb put-item \
    --table-name Music  \
    --item \
        '{"Artist": {"S": "No One You Know"}, "SongTitle": {"S": "Howdy"}, "AlbumTitle": {"S": "Somewhat Famous"}, "Awards": {"N": "2"}}'

aws dynamodb put-item \
    --table-name Music \
    --item \
        '{"Artist": {"S": "Acme Band"}, "SongTitle": {"S": "Happy Day"}, "AlbumTitle": {"S": "Songs About Life"}, "Awards": {"N": "10"}}'

aws dynamodb put-item \
    --table-name Music \
    --item \
        '{"Artist": {"S": "Acme Band"}, "SongTitle": {"S": "PartiQL Rocks"}, "AlbumTitle": {"S": "Another Album Title"}, "Awards": {"N": "8"}}'

7. データを読み込み

7-1. データの読み込み

aws dynamodb get-item --consistent-read \
    --table-name Music \
    --key '{ "Artist": {"S": "Acme Band"}, "SongTitle": {"S": "Happy Day"}}'
{
    "Item": {
        "AlbumTitle": {
            "S": "Songs About Life"
        },
        "Awards": {
            "N": "10"
        },
        "Artist": {
            "S": "Acme Band"
        },
        "SongTitle": {
            "S": "Happy Day"
        }
    }
}

8. データを更新

8-1. データの更新

aws dynamodb update-item \
    --table-name Music \
    --key '{ "Artist": {"S": "Acme Band"}, "SongTitle": {"S": "Happy Day"}}' \
    --update-expression "SET AlbumTitle = :newval" \
    --expression-attribute-values '{":newval":{"S":"Updated Album Title"}}' \
    --return-values ALL_NEW
{
    "Attributes": {
        "AlbumTitle": {
            "S": "Updated Album Title"
        },
        "Awards": {
            "N": "10"
        },
        "Artist": {
            "S": "Acme Band"
        },
        "SongTitle": {
            "S": "Happy Day"
        }
    }
}

9. データをクエリ

9-1. データをクエリ

aws dynamodb query \
    --table-name Music \
    --key-condition-expression "Artist = :name" \
    --expression-attribute-values  '{":name":{"S":"Acme Band"}}'
{
    "Items": [
        {
            "AlbumTitle": {
                "S": "Updated Album Title"
            },
            "Awards": {
                "N": "10"
            },
            "Artist": {
                "S": "Acme Band"
            },
            "SongTitle": {
                "S": "Happy Day"
            }
        },
        {
            "AlbumTitle": {
                "S": "Another Album Title"
            },
            "Awards": {
                "N": "8"
            },
            "Artist": {
                "S": "Acme Band"
            },
            "SongTitle": {
                "S": "PartiQL Rocks"
            }
        }
    ],
    "Count": 2,
    "ScannedCount": 2,
    "ConsumedCapacity": null
}

10. グローバルセカンダリインデックスを作成

10-1. グローバルセカンダリインデックスを作成

  • AlbumTitle
aws dynamodb update-table \
    --table-name Music \
    --attribute-definitions AttributeName=AlbumTitle,AttributeType=S \
    --global-secondary-index-updates \
        "[{\"Create\":{\"IndexName\": \"AlbumTitle-index\",\"KeySchema\":[{\"AttributeName\":\"AlbumTitle\",\"KeyType\":\"HASH\"}], \
        \"ProvisionedThroughput\": {\"ReadCapacityUnits\": 10, \"WriteCapacityUnits\": 5      },\"Projection\":{\"ProjectionType\":\"ALL\"}}}]"
{
    "TableDescription": {
        "AttributeDefinitions": [
            {
                "AttributeName": "AlbumTitle",
                "AttributeType": "S"
            },
            {
                "AttributeName": "Artist",
                "AttributeType": "S"
            },
            {
                "AttributeName": "SongTitle",
                "AttributeType": "S"
            }
        ],
        "TableName": "Music",
        "KeySchema": [
            {
                "AttributeName": "Artist",
                "KeyType": "HASH"
            },
            {
                "AttributeName": "SongTitle",
                "KeyType": "RANGE"
            }
        ],
        "TableStatus": "UPDATING",
        "CreationDateTime": "2024-04-27T10:15:35.266000+09:00",
        "ProvisionedThroughput": {
            "NumberOfDecreasesToday": 0,
            "ReadCapacityUnits": 5,
            "WriteCapacityUnits": 5
        },
        "TableSizeBytes": 0,
        "ItemCount": 0,
        "TableArn": "arn:aws:dynamodb:ap-northeast-1:123456789012:table/Music",
        "TableId": "5ec519df-c7af-4d3f-87c1-9d21eb872609",
        "GlobalSecondaryIndexes": [
            {
                "IndexName": "AlbumTitle-index",
                "KeySchema": [
                    {
                        "AttributeName": "AlbumTitle",
                        "KeyType": "HASH"
                    }
                ],
                "Projection": {
                    "ProjectionType": "ALL"
                },
                "IndexStatus": "CREATING",
                "Backfilling": false,
                "ProvisionedThroughput": {
                    "NumberOfDecreasesToday": 0,
                    "ReadCapacityUnits": 10,
                    "WriteCapacityUnits": 5
                },
                "IndexSizeBytes": 0,
                "ItemCount": 0,
                "IndexArn": "arn:aws:dynamodb:ap-northeast-1:123456789012:table/Music/index/AlbumTitle-index"
            }
        ],
        "TableClassSummary": {
            "TableClass": "STANDARD"
        },
        "DeletionProtectionEnabled": false
    }
}

※IndexStatusが「CREATING」⇒「ACTIVE」となる事を確認

aws dynamodb describe-table --table-name Music | grep IndexStatus

11. グローバルセカンダリインデックスをクエリ

11-1. グローバルセカンダリインデックスをクエリ

aws dynamodb query \
    --table-name Music \
    --index-name AlbumTitle-index \
    --key-condition-expression "AlbumTitle = :name" \
    --expression-attribute-values  '{":name":{"S":"Somewhat Famous"}}'
{
    "Items": [
        {
            "AlbumTitle": {
                "S": "Somewhat Famous"
            },
            "Awards": {
                "N": "1"
            },
            "Artist": {
                "S": "No One You Know"
            },
            "SongTitle": {
                "S": "Call Me Today"
            }
        },
        {
            "AlbumTitle": {
                "S": "Somewhat Famous"
            },
            "Awards": {
                "N": "2"
            },
            "Artist": {
                "S": "No One You Know"
            },
            "SongTitle": {
                "S": "Howdy"
            }
        }
    ],
    "Count": 2,
    "ScannedCount": 2,
    "ConsumedCapacity": null
}

12. リソースをクリーンアップ

※必要に応じ削除

aws dynamodb delete-table --table-name Music

13. 備考

Amazon DynamoDBをAPIで操作する内容でした。次回はPartiQLで操作する内容を予定してます。

14. 参考

  1. Amazon DynamoDB とは – Amazon DynamoDB
  2. IAM ユーザーグループ – AWS Identity and Access Management (amazon.com)
  3. AWS アカウント での IAM ユーザーの作成 – AWS Identity and Access Management (amazon.com)
  4. AWS Command Line Interface とはどのようなものですか。 – AWS Command Line Interface (amazon.com)

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