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describe 等で取得した情報を Dynamo DB に保存する

Last updated at Posted at 2021-05-18

素人が自分のノートとして書いてますが、改善点あれば是非コメントください

DynamoDBテーブルに入力する値を渡された関数だけをピックアップ。

aws-lambda-python3_8
import json
import boto3

def lambda_handler():

    #DynamoDBテーブルはあらかじめ作ってある前提。本来なら、テーブルが無ければ作るみたいな感じにすべき。
    table_name = 'test'

    #DynamoDBテーブルに行として追加する情報を item として定義
    item = {
            "db-instance-id": 'i-xxxxxxxxxxxx',
            "db-instance-version": '1.23.3'
    }

    #DynamoDBクライアントを定義
    dynamodb_client = boto3.resource('dynamodb')

    #テーブルにItemを入力
    dynamo_table = dynamodb_client.Table(table_name)
    dynamo_table.put_item(Item=item)

    return

"An error occurred (AccessDeniedException) when calling the PutItem operation のエラーが出たときは権限問題。

エラー
{
  "errorMessage": "An error occurred (AccessDeniedException) when calling the PutItem operation: User: arn:aws:sts::xxxxxxxxx:assumed-role/xxxx-listing-role-8pgwts5t/pvdriver-listing is not authorized to perform: dynamodb:PutItem on resource: arn:aws:dynamodb:ap-northeast-1:xxxxxxxxxxxx:table/yyyyyyyy",
  "errorType": "ClientError",
  "stackTrace": [
    "  File \"/var/task/lambda_function.py\", line 40, in lambda_handler\n    insert(index, name, version)\n",
    "  File \"/var/task/lambda_function.py\", line 16, in insert\n    dynamodb_table.put_item(Item=item)\n",
    "  File \"/var/runtime/boto3/resources/factory.py\", line 520, in do_action\n    response = action(self, *args, **kwargs)\n",
    "  File \"/var/runtime/boto3/resources/action.py\", line 83, in __call__\n    response = getattr(parent.meta.client, operation_name)(*args, **params)\n",
    "  File \"/var/runtime/botocore/client.py\", line 357, in _api_call\n    return self._make_api_call(operation_name, kwargs)\n",
    "  File \"/var/runtime/botocore/client.py\", line 676, in _make_api_call\n    raise error_class(parsed_response, operation_name)\n"
  ]
}

対象のLambda関数に付与されたIAMロールに AmazonDynamoDBFullAccess を追加する。
Lambda > 関数 > 対象Lambda関数 > 設定タブ > アクセス権限 > 実行ロール > 【対象ロール】> IAM設定画面に遷移 > 【ポリシーをアタッチします】> AmazonDynamoDBFullAccess を選択 > 【ポリシーのアタッチ】
Putが出来ないといけないので、とりあえず FullAccess を選択。

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