使用 GitLab CI/CD 和 Terraform 实现 Lambda 以进行 SFTP 集成、Go 中的 S Databricks-Golang-PHP中文网

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使用 GitLab CI/CD 和 Terraform 实现 Lambda 以进行 SFTP 集成、Go 中的 S Databricks

Linda Hamilton

Nov 03, 2024 am 07:50 AM

Implementando uma Lambda com GitLab CI/CD e Terraform para Integração SFTP, S Databricks em Go

通过 Databricks 中的流程自动化降低成本

我的客户需要降低在 Databricks 上运行的流程的成本。 Databricks 负责的功能之一是从各种 SFTP 收集文件，解压缩它们并将它们放入数据湖中。

自动化数据工作流程是现代数据工程的重要组成部分。在本文中，我们将探讨如何使用 GitLab CI/CD 和 Terraform 创建 AWS Lambda 函数，该函数允许 Go 应用程序连接到 SFTP 服务器、收集文件、将其存储在 Amazon S3 中，并最终在 Databricks 上触发作业。这种端到端的流程对于依赖高效数据集成和自动化的系统至关重要。

阅读本文需要什么

具有项目存储库的 GitLab 帐户。
有权创建 Lambda、S3 和 IAM 资源的 AWS 账户。
具有创建和运行作业权限的 Databricks 帐户。
Go、Terraform 和 GitLab CI/CD 的基础知识。

第 1 步：准备 Go 应用程序

首先创建一个 Go 应用程序，该应用程序将连接到 SFTP 服务器来收集文件。使用 github.com/pkg/sftp 等软件包建立 SFTP 连接，使用 github.com/aws/aws-sdk-go 与 AWS S3 服务交互。

package main

import (
 "fmt"
 "log"
 "os"
 "path/filepath"

 "github.com/pkg/sftp"
 "golang.org/x/crypto/ssh"
 "github.com/aws/aws-sdk-go/aws"
 "github.com/aws/aws-sdk-go/aws/session"
 "github.com/aws/aws-sdk-go/service/s3/s3manager"
)

func main() {
 // Configuração do cliente SFTP
 user := "seu_usuario_sftp"
 pass := "sua_senha_sftp"
 host := "endereco_sftp:22"
 config := &ssh.ClientConfig{
  User: user,
  Auth: []ssh.AuthMethod{
   ssh.Password(pass),
  },
  HostKeyCallback: ssh.InsecureIgnoreHostKey(),
 }

 // Conectar ao servidor SFTP
 conn, err := ssh.Dial("tcp", host, config)
 if err != nil {
  log.Fatal(err)
 }
 client, err := sftp.NewClient(conn)
 if err != nil {
  log.Fatal(err)
 }
 defer client.Close()

 // Baixar arquivos do SFTP
 remoteFilePath := "/path/to/remote/file"
 localDir := "/path/to/local/dir"
 localFilePath := filepath.Join(localDir, filepath.Base(remoteFilePath))
 dstFile, err := os.Create(localFilePath)
 if err != nil {
  log.Fatal(err)
 }
 defer dstFile.Close()

 srcFile, err := client.Open(remoteFilePath)
 if err != nil {
  log.Fatal(err)
 }
 defer srcFile.Close()

 if _, err := srcFile.WriteTo(dstFile); err != nil {
  log.Fatal(err)
 }

 fmt.Println("Arquivo baixado com sucesso:", localFilePath)

 // Configuração do cliente S3
 sess := session.Must(session.NewSession(&aws.Config{
  Region: aws.String("us-west-2"),
 }))
 uploader := s3manager.NewUploader(sess)

 // Carregar arquivo para o S3
 file, err := os.Open(localFilePath)
 if err != nil {
  log.Fatal(err)
 }
 defer file.Close()

 _, err = uploader.Upload(&s3manager.UploadInput{
  Bucket: aws.String("seu-bucket-s3"),
  Key:    aws.String(filepath.Base(localFilePath)),
  Body:   file,
 })
 if err != nil {
  log.Fatal("Falha ao carregar arquivo para o S3:", err)
 }

 fmt.Println("Arquivo carregado com sucesso no S3")
}

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步骤 2：配置 Terraform

Terraform 将用于在 AWS 上配置 Lambda 函数和所需资源。使用创建 Lambda 函数、IAM 策略和 S3 存储桶所需的配置创建 main.tf 文件。

provider "aws" {
  region = "us-east-1"
}

resource "aws_iam_role" "lambda_execution_role" {
  name = "lambda_execution_role"

  assume_role_policy = jsonencode({
    Version = "2012-10-17",
    Statement = [
      {
        Action = "sts:AssumeRole",
        Effect = "Allow",
        Principal = {
          Service = "lambda.amazonaws.com"
        },
      },
    ]
  })
}

resource "aws_iam_policy" "lambda_policy" {
  name        = "lambda_policy"
  description = "A policy that allows a lambda function to access S3 and SFTP resources"

  policy = jsonencode({
    Version = "2012-10-17",
    Statement = [
      {
        Action = [
          "s3:ListBucket",
          "s3:GetObject",
          "s3:PutObject",
        ],
        Effect = "Allow",
        Resource = [
          "arn:aws:s3:::seu-bucket-s3",
          "arn:aws:s3:::seu-bucket-s3/*",
        ],
      },
    ]
  })
}

resource "aws_iam_role_policy_attachment" "lambda_policy_attachment" {
  role       = aws_iam_role.lambda_execution_role.name
  policy_arn = aws_iam_policy.lambda_policy.arn
}

resource "aws_lambda_function" "sftp_lambda" {
  function_name = "sftp_lambda_function"

  s3_bucket = "seu-bucket-s3-com-codigo-lambda"
  s3_key    = "sftp-lambda.zip"

  handler = "main"
  runtime = "go1.x"

  role = aws_iam_role.lambda_execution_role.arn

  environment {
    variables = {
      SFTP_HOST     = "endereco_sftp",
      SFTP_USER     = "seu_usuario_sftp",
      SFTP_PASSWORD = "sua_senha_sftp",
      S3_BUCKET     = "seu-bucket-s3",
    }
  }
}

resource "aws_s3_bucket" "s3_bucket" {
  bucket = "seu-bucket-s3"
  acl    = "private"
}

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步骤 3：配置 GitLab CI/CD

在 GitLab 中，在 .gitlab-ci.yml 文件中定义 CI/CD 管道。该管道应包括测试 Go 应用程序的步骤、运行 Terraform 来配置基础设施以及必要时的清理步骤。

stages:
  - test
  - build
  - deploy

variables:
  S3_BUCKET: "seu-bucket-s3"
  AWS_DEFAULT_REGION: "us-east-1"
  TF_VERSION: "1.0.0"

before_script:
  - 'which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )'
  - eval $(ssh-agent -s)
  - echo "$PRIVATE_KEY" | tr -d '\r' | ssh-add -
  - mkdir -p ~/.ssh
  - chmod 700 ~/.ssh
  - ssh-keyscan -H 'endereco_sftp' >> ~/.ssh/known_hosts

test:
  stage: test
  image: golang:1.18
  script:
    - go test -v ./...

build:
  stage: build
  image: golang:1.18
  script:
    - go build -o myapp
    - zip -r sftp-lambda.zip myapp
  artifacts:
    paths:
      - sftp-lambda.zip
  only:
    - master

deploy:
  stage: deploy
  image: hashicorp/terraform:$TF_VERSION
  script:
    - terraform init
    - terraform apply -auto-approve
  only:
    - master
  environment:
    name: production

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第 4 步：与 Databricks 集成

将文件上传到 S3 后，Lambda 函数必须触发 Databricks 中的作业。这可以使用 Databricks API 启动现有作业来完成。

package main

import (
 "bytes"
 "encoding/json"
 "fmt"
 "net/http"
)

// Estrutura para a requisição de iniciar um job no Databricks
type DatabricksJobRequest struct {
 JobID int `json:"job_id"`
}

// Função para acionar um job no Databricks
func triggerDatabricksJob(databricksInstance string, token string, jobID int) error {
 url := fmt.Sprintf("https://%s/api/2.0/jobs/run-now", databricksInstance)
 requestBody, _ := json.Marshal(DatabricksJobRequest{JobID: jobID})
 req, err := http.NewRequest("POST", url, bytes.NewBuffer(requestBody))
 if err != nil {
  return err
 }

 req.Header.Set("Content-Type", "application/json")
 req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))

 client := &http.Client{}
 resp, err := client.Do(req)
 if err != nil {
  return err
 }
 defer resp.Body.Close()

 if resp.StatusCode != http.StatusOK {
  return fmt.Errorf("Failed to trigger Databricks job, status code: %d", resp.StatusCode)
 }

 return nil
}

func main() {
 // ... (código existente para conectar ao SFTP e carregar no S3)

 // Substitua pelos seus valores reais
 databricksInstance := "your-databricks-instance"
 databricksToken := "your-databricks-token"
 databricksJobID := 123 // ID do job que você deseja acionar

 // Acionar o job no Databricks após o upload para o S3
 err := triggerDatabricksJob(databricksInstance, databricksToken, databricksJobID)
 if err != nil {
  log.Fatal("Erro ao acionar o job do Databricks:", err)
 }

 fmt.Println("Job do Databricks acionado com sucesso")
}

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第 5 步：运行管道

将代码推送到 GitLab 存储库以供管道运行。检查所有步骤是否已成功完成，Lambda 函数是否正常运行并与 S3 和 Databricks 正确交互。

一旦您拥有完整的代码并配置了 .gitlab-ci.yml 文件，您就可以按照以下步骤运行管道：

将您的代码推送到 GitLab 存储库：

package main

import (
 "fmt"
 "log"
 "os"
 "path/filepath"

 "github.com/pkg/sftp"
 "golang.org/x/crypto/ssh"
 "github.com/aws/aws-sdk-go/aws"
 "github.com/aws/aws-sdk-go/aws/session"
 "github.com/aws/aws-sdk-go/service/s3/s3manager"
)

func main() {
 // Configuração do cliente SFTP
 user := "seu_usuario_sftp"
 pass := "sua_senha_sftp"
 host := "endereco_sftp:22"
 config := &ssh.ClientConfig{
  User: user,
  Auth: []ssh.AuthMethod{
   ssh.Password(pass),
  },
  HostKeyCallback: ssh.InsecureIgnoreHostKey(),
 }

 // Conectar ao servidor SFTP
 conn, err := ssh.Dial("tcp", host, config)
 if err != nil {
  log.Fatal(err)
 }
 client, err := sftp.NewClient(conn)
 if err != nil {
  log.Fatal(err)
 }
 defer client.Close()

 // Baixar arquivos do SFTP
 remoteFilePath := "/path/to/remote/file"
 localDir := "/path/to/local/dir"
 localFilePath := filepath.Join(localDir, filepath.Base(remoteFilePath))
 dstFile, err := os.Create(localFilePath)
 if err != nil {
  log.Fatal(err)
 }
 defer dstFile.Close()

 srcFile, err := client.Open(remoteFilePath)
 if err != nil {
  log.Fatal(err)
 }
 defer srcFile.Close()

 if _, err := srcFile.WriteTo(dstFile); err != nil {
  log.Fatal(err)
 }

 fmt.Println("Arquivo baixado com sucesso:", localFilePath)

 // Configuração do cliente S3
 sess := session.Must(session.NewSession(&aws.Config{
  Region: aws.String("us-west-2"),
 }))
 uploader := s3manager.NewUploader(sess)

 // Carregar arquivo para o S3
 file, err := os.Open(localFilePath)
 if err != nil {
  log.Fatal(err)
 }
 defer file.Close()

 _, err = uploader.Upload(&s3manager.UploadInput{
  Bucket: aws.String("seu-bucket-s3"),
  Key:    aws.String(filepath.Base(localFilePath)),
  Body:   file,
 })
 if err != nil {
  log.Fatal("Falha ao carregar arquivo para o S3:", err)
 }

 fmt.Println("Arquivo carregado com sucesso no S3")
}

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provider "aws" {
  region = "us-east-1"
}

resource "aws_iam_role" "lambda_execution_role" {
  name = "lambda_execution_role"

  assume_role_policy = jsonencode({
    Version = "2012-10-17",
    Statement = [
      {
        Action = "sts:AssumeRole",
        Effect = "Allow",
        Principal = {
          Service = "lambda.amazonaws.com"
        },
      },
    ]
  })
}

resource "aws_iam_policy" "lambda_policy" {
  name        = "lambda_policy"
  description = "A policy that allows a lambda function to access S3 and SFTP resources"

  policy = jsonencode({
    Version = "2012-10-17",
    Statement = [
      {
        Action = [
          "s3:ListBucket",
          "s3:GetObject",
          "s3:PutObject",
        ],
        Effect = "Allow",
        Resource = [
          "arn:aws:s3:::seu-bucket-s3",
          "arn:aws:s3:::seu-bucket-s3/*",
        ],
      },
    ]
  })
}

resource "aws_iam_role_policy_attachment" "lambda_policy_attachment" {
  role       = aws_iam_role.lambda_execution_role.name
  policy_arn = aws_iam_policy.lambda_policy.arn
}

resource "aws_lambda_function" "sftp_lambda" {
  function_name = "sftp_lambda_function"

  s3_bucket = "seu-bucket-s3-com-codigo-lambda"
  s3_key    = "sftp-lambda.zip"

  handler = "main"
  runtime = "go1.x"

  role = aws_iam_role.lambda_execution_role.arn

  environment {
    variables = {
      SFTP_HOST     = "endereco_sftp",
      SFTP_USER     = "seu_usuario_sftp",
      SFTP_PASSWORD = "sua_senha_sftp",
      S3_BUCKET     = "seu-bucket-s3",
    }
  }
}

resource "aws_s3_bucket" "s3_bucket" {
  bucket = "seu-bucket-s3"
  acl    = "private"
}

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GitLab CI/CD 将检测新的提交并自动启动管道。
通过访问存储库的 CI/CD 部分来跟踪 GitLab 中管道的执行。
如果所有阶段都成功，您的 Lambda 函数将被部署并可供使用。

请记住，您需要在 GitLab CI/CD 中配置环境变量来存储敏感信息，例如访问令牌和私钥。这可以在“设置”>“设置”中完成。 ‘CI/CD’>来自 GitLab 项目的“变量”。

此外，请确保 Databricks 令牌具有触发作业所需的权限，并且该作业具有提供的 ID。

结论

使用 GitLab CI/CD、Terraform 和 AWS Lambda 等工具可以显着简化自动化数据工程任务。通过遵循本文中概述的步骤，您可以创建一个强大的系统，自动执行 SFTP、S3 和 Databricks 之间的数据收集和集成，所有这些都具有 Go 的效率和简单性。通过这种方法，您将有能力解决以下问题。大规模数据集成的挑战。

我的联系人：

领英 - Airton Lira Junior

iMasters - Airton Lira Junior

aws #lambda #terraform #gitlab #ci_cd #go #databricks #dataengineering #automation

stages:
  - test
  - build
  - deploy

variables:
  S3_BUCKET: "seu-bucket-s3"
  AWS_DEFAULT_REGION: "us-east-1"
  TF_VERSION: "1.0.0"

before_script:
  - 'which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )'
  - eval $(ssh-agent -s)
  - echo "$PRIVATE_KEY" | tr -d '\r' | ssh-add -
  - mkdir -p ~/.ssh
  - chmod 700 ~/.ssh
  - ssh-keyscan -H 'endereco_sftp' >> ~/.ssh/known_hosts

test:
  stage: test
  image: golang:1.18
  script:
    - go test -v ./...

build:
  stage: build
  image: golang:1.18
  script:
    - go build -o myapp
    - zip -r sftp-lambda.zip myapp
  artifacts:
    paths:
      - sftp-lambda.zip
  only:
    - master

deploy:
  stage: deploy
  image: hashicorp/terraform:$TF_VERSION
  script:
    - terraform init
    - terraform apply -auto-approve
  only:
    - master
  environment:
    name: production

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以上是使用 GitLab CI/CD 和 Terraform 实现 Lambda 以进行 SFTP 集成、Go 中的 S Databricks的详细内容。更多信息请关注PHP中文网其他相关文章！

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