DIO Live Step Functions - 22/12/2021

Serviços AWS utilizados

• AWS Step Functions
• AWS Lambda
• Amazon S3
• Amazon Rekognition
• Amazon DynamoDB
• Amazon Cloudwatch
• Amazon Cloudtrail

Requisitos

• Conta ativa na AWS

Roteiro de desenvolvimento

• Criar uma tabela no Amazon DynamoDB
• Criar duas funções AWS Lambda
• Criar um bucket no Amazon S3
• Criar uma máquina de estado no AWS Step Functions
• Configurar uma trail no AWS Cloudtrail
• Criar uma regra de evento no AWS Cloudwatch
• Testar

Passos do desenvolvimento

Criar bucket no Amazon S3

• S3 Console -> Create bucket -> Bucket name [seu_bucket] -> Create bucket

Criar tabela no Amazon DynamoDB

• DynamoDB Console -> Create table - > Table name [nome_da_sua_tabela] -> Partition key [filename] -> Create table

Criar funções lambda

Função de extração de metadados do arquivo no Amazon S3

• Lambda Console -> Create function -> Author from scratch -> Function name [extract-metadata-function] -> Runtime [Python3.8] -> Role [Create new role with basic Lambda permissions] -> Create function
• Inserir o código no editor de código -> Deploy

Função para chamada da API do Amazon Rekognition

• Lambda Console -> Create function -> Author from scratch -> Function name [rekognition-api-function] -> Runtime [Python3.8] -> Role [Create new role with basic Lambda permissions] -> Create function
• Inserir o código no editor de código -> Deploy

Configurar políticas de acesso

• Selecionar a função criada -> Configuration -> Permissions -> Execution role

• Adicionar as seguintes Policies

  • CloudWatchFullAccess
  • AmazonRekognitionFullAccess
  • AmazonS3FullAccess
  • AmazonDynamoDBFullAccess
  • AWSCloudTrail_FullAccess

Criar máquina de estado no AWS Step Functions

• Step Functions Console -> State machines -> Create state machine -> Write your workflow in code -> Standard -> Inserir o código no editor -> Next
• Name [nome_da_sua_state_machine] -> Execution role [Create_new_role] -> Create state machine

Configurar o CloudTrail

• CloudTrail Console -> Trails -> Trail name [nome_da_trail] -> Storage location [Create new S3 bucket] -> Next
• Events -> Event type -> Data events -> Switch to basic event selectors -> Individual bucket selection [read, write] -> Choose bucket -> Next
• Create trail

Configurar regra de evento no CloudWatch

• CloudWatch Console -> Rules -> Create Rule -> Event Pattern -> Service Name [Simple Storage Service] -> Event Type [Object Level Operations] -> Specific Operations [PutObject] -> Specific bucket by name [bucket_criado]
• Targets -> Add target -> Step Functions state machine -> State machine [sua_state_machine] -> Create a new role for this specific resource
• Configure details -> Name [nome_da_rule]