Dynamodb lambda function 錯誤在 AttributeDefinitions[0] 中缺少必需的參數

Question

我正在使用 AWS Lambda Function 並希望將它們與 Dynamo-db 集成以將我的 cloudwatch 數據矩陣跟蹤到其中，以便在發送或不發送警報時跟蹤發送消息的警報以記錄在數據庫中。

如果我不使用 Dynamo-DB，function 完全沒問題，下面是 Dynamo-db 的代碼。 我從未使用過 DynamoDB，但才剛剛開始。

代碼：

import json
import os
import boto3
from datetime import datetime, timedelta
from boto3.dynamodb.conditions import Key
from botocore.exceptions import ClientError

def lambda_handler(event, context):
    fsx = boto3.client('fsx')
    cloudwatch = boto3.client('cloudwatch') 
    ses = boto3.client('ses')
    region_name = os.environ['AWS_REGION']
    dynamodb = boto3.resource('dynamodb', region_name=region_name)
    now = datetime.utcnow()
    start_time = (now - timedelta(minutes=5)).strftime('%Y-%m-%dT%H:%M:%SZ')
    end_time = now.strftime('%Y-%m-%dT%H:%M:%SZ')
    table =  []
    result = []
    next_token = None
    while True:
        if next_token:
            response = fsx.describe_file_systems(NextToken=next_token)
        else:
            response = fsx.describe_file_systems()
        for filesystem in response.get('FileSystems'):
            filesystem_id = filesystem.get('FileSystemId')
            table.append(filesystem_id)
        next_token = response.get('NextToken')
        if not next_token:
            break
    try:
        # Create the DynamoDB table if it does not exist
        table = dynamodb.create_table(
            TableName='FsxNMonitorFsx',
            KeySchema=[
                {
                    'AttributeName': 'filesystem_id',
                    'KeyType': 'HASH' #Partition key
                }
            ],
            AttributeDefinitions=[
                {
                    'attributeName': 'filesystem_id',
                    'AttributeType': 'S'
                },
                {
                    'attributeName': 'alert_sent',
                    'attributeType': 'BOOL'
                }
            ],
            ProvisionedThroughput={
                'ReadCapacityUnits': 10,
                'WriteCapacityUnits': 10
            }
        )
        # Wait for the table to be created
        table.meta.client.get_waiter('table_exists').wait(TableName='FsxNMonitorFsx')
    except ClientError as e:
        if e.response['Error']['Code'] != 'ResourceInUseException':
            raise
    # Code to retrieve metric data and check if alert needs to be sent
    for filesystem_id in table:
        response = cloudwatch.get_metric_data(
            MetricDataQueries=[
                {
                    'Id': 'm1',
                    'MetricStat': {
                        'Metric': {
                            'Namespace': 'AWS/FSx',
                            'MetricName': 'StorageCapacity',
                            'Dimensions': [
                                {
                                    'Name': 'FileSystemId',
                                    'Value': filesystem_id
                                },
                                {
                                    'Name': 'StorageTier',
                                    'Value': 'SSD'
                                },
                                {
                                    'Name': 'DataType',
                                    'Value': 'All'
                                }
                            ]
                        },
                        'Period': 60,
                        'Stat': 'Sum'
                    },
                    'ReturnData': True
                },
                {
                    'Id': 'm2',
                    'MetricStat': {
                        'Metric': {
                            'Namespace': 'AWS/FSx',
                            'MetricName': 'StorageUsed',
                            'Dimensions': [
                                {
                                    'Name': 'FileSystemId',
                                    'Value': filesystem_id
                                },
                                {
                                    'Name': 'StorageTier',
                                    'Value': 'SSD'
                                },
                                {
                                    'Name': 'DataType',
                                    'Value': 'All'
                                }
                            ]
                        },
                        'Period': 60,
                        'Stat': 'Sum'
                    },
                    'ReturnData': True
                }
            ],
            StartTime=start_time,
            EndTime=end_time
        )
        storage_capacity = response['MetricDataResults'][0]['Values']
        storage_used = response['MetricDataResults'][1]['Values']
        if storage_capacity:
            storage_capacity = storage_capacity[0]
        else:
            storage_capacity = None
        if storage_used:
            storage_used = storage_used[0]
        else:
            storage_used = None
        if storage_capacity and storage_used:
            percent_used = (storage_used / storage_capacity) * 100
        else:
            percent_used = None
        response = dynamodb.get_item(
            TableName='FsxNMonitorFsx',
            Key={'filesystem_id': {'S': filesystem_id}}
        )
        if 'Item' in response:
            alert_sent = response['Item']['alert_sent']['BOOL']
        else:
            alert_sent = False
        # Send alert if storage usage exceeds threshold and no alert has been sent yet
        if percent_used > 80 and not alert_sent:
            email_body = "... some code..."

            ses.send_email(
                Source='abc@example.com'',
                Destination={
                    'ToAddresses': ['examp_mail@example.com'],
                },
                Message={
                    'Subject': {
                        'Data': email_subject
                    },
                    'Body': {
                        'Html': {
                            'Data': email_body
                        }
                    }
                }
            )
            # Update FsxNMonitorFsx in DynamoDB
            dynamodb.update_item(
                TableName='FsxNMonitorFsx',
                Key={'filesystem_id': {'S': filesystem_id}},
                UpdateExpression='SET alert_sent = :val',
                ExpressionAttributeValues={':val': {'BOOL': True}}
            )
    return {
        'statusCode': 200,
        'body': json.dumps('Email sent!')
    }

錯誤：

Response
{
  "errorMessage": "Parameter validation failed:\nMissing required parameter in AttributeDefinitions[0]: \"AttributeName\"\nUnknown parameter in AttributeDefinitions[0]: \"attributeName\", must be one of: AttributeName, AttributeType\nMissing required parameter in AttributeDefinitions[1]: \"AttributeName\"\nMissing required parameter in AttributeDefinitions[1]: \"AttributeType\"\nUnknown parameter in AttributeDefinitions[1]: \"attributeName\", must be one of: AttributeName, AttributeType\nUnknown parameter in AttributeDefinitions[1]: \"attributeType\", must be one of: AttributeName, AttributeType",
  "errorType": "ParamValidationError",
  "requestId": "54de7194-f8e8-4a9f-91d6-0f77575de775",


Function Logs
START RequestId: 54de7194-f8e8-4a9f-91d6-0f77575de775 Version: $LATEST
[ERROR] ParamValidationError: Parameter validation failed:
Missing required parameter in AttributeDefinitions[0]: "AttributeName"
Unknown parameter in AttributeDefinitions[0]: "attributeName", must be one of: AttributeName, AttributeType
Missing required parameter in AttributeDefinitions[1]: "AttributeName"
Missing required parameter in AttributeDefinitions[1]: "AttributeType"
Unknown parameter in AttributeDefinitions[1]: "attributeName", must be one of: AttributeName, AttributeType
Unknown parameter in AttributeDefinitions[1]: "attributeType", must be one of: AttributeName, AttributeType

編輯：

在下面的部分中，我只是將'filesystem_id'更改為filesystem_id ，另一個是將所有 lowercae attribute更改為第一個字母 upper-cae ，如Attribute 。

        {
            'AttributeName': filesystem_id,
            'KeyType': 'HASH' #Partition key
        }
    ],
    AttributeDefinitions=[
        {
            'AttributeName': filesystem_id,
            'AttributeType': 'S'
        },
        {
            'attributeName': 'alert_sent',
            'attributeType': 'BOOL'
        }
    ],
    ProvisionedThroughput={
        'ReadCapacityUnits': 10,
        'WriteCapacityUnits': 10
    }

現在是新錯誤：

Response
{
  "errorMessage": "An error occurred (ValidationException) when calling the CreateTable operation: 1 validation error detected: Value 'BOOL' at 'attributeDefinitions.2.member.attributeType' failed to satisfy constraint: Member must satisfy enum value set: [B, N, S]",
  "errorType": "ClientError",

有人可以幫忙嗎？

Answer 1

錯誤消息中清楚描述的所有問題：

1. 有問題的部分是AttributeDefinitions
2. 允許的鍵名是!A!ttribute(Name or Type)但不是!a!ttribute(Name or Type) 。 在編輯問題后，您只改進了AttributeDefinitions的第一個元素。
3. AttributeType 應該是S 、 N或B 。 不是BOOL

屬性類型（字符串）——[必需]
屬性的數據類型，其中：

S - 屬性是 String 類型
N - 屬性的類型為 Number
B - 屬性是二進制類型