如何将 AWS Node.js Lambda 函数迁移至 OpenFaaS？

-> API: /dev/person,-> Lambda calls DynamoDB: {"id": "ruan.bekker"},-> Response: {"id": "ruan.bekker", "name": "ruan", ...}

$ mkdir -p ~/dev/aws-node-get-dynamodb \&& cd ~/dev/aws-node-get-dynamodb$ npm install -g serverless$ serverless create --template aws-nodejs 

$ mkdir function/handler.js$ cat function/handler.js'use strict';const AWS = require('aws-sdk');const dynamoDb = new AWS.DynamoDB.DocumentClient();module.exports.identity = (event, context, callback) => {const params = {TableName: process.env.DYNAMODB_TABLE,Key: {     id: 'ruan.bekker',   }, };dynamoDb.get(params, (error, result) => {    if (error) {     console.error(error);      callback(null, {        statusCode: error.statusCode || 501,       headers: { 'Content-Type': 'text/plain' },       body: 'GetItem Failed',      });      return;    }    const response = {      statusCode: 200,      body: JSON.stringify(result.Item),    };    callback(null, response);  });};

$ cat serverless.ymlservice: aws-node-get-dynamodbframeworkVersion: ">=1.1.0 <2.0.0"provider:  name: aws  runtime: nodejs10.x  environment:    DYNAMODB_TABLE: my-dynamodb-table  iamRoleStatements:    - Effect: Allow      Action:        - dynamodb:GetItem      Resource: "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}"functions:  get:    handler: functions/handler.identity    events:      - http:          path: person          method: get          cors: trueresources:  Resources:    TodosDynamoDbTable:      Type: 'AWS::DynamoDB::Table'      DeletionPolicy: Retain      Properties:        AttributeDefinitions:          -            AttributeName: id            AttributeType: S        KeySchema:          -            AttributeName: id            KeyType: HASH        ProvisionedThroughput:          ReadCapacityUnits: 1          WriteCapacityUnits: 1        TableName: ${self:provider.environment.DYNAMODB_TABLE}

$ serverless deploy --region eu-west-1Serverless: Packaging service...Serverless: Excluding development dependencies...Serverless: Uploading CloudFormation file to S3...Serverless: Uploading artifacts...Serverless: Uploading service aws-node-get-dynamodb.zip file to S3 (7.38 MB)...Serverless: Validating template...Serverless: Updating Stack...Serverless: Checking Stack update progress.................Serverless: Stack update finished...Service Informationservice: aws-node-get-dynamodbstage: devregion: eu-west-1stack: aws-node-get-dynamodb-devresources: 12api keys:  Noneendpoints:  GET - https://xx.execute-api.eu-west-1.amazonaws.com/dev/personfunctions:  get: aws-node-get-dynamodb-dev-getlayers:  NoneServerless: Run the "serverless" command to setup monitoring, troubleshooting and testing.

$ aws dynamodb put-item \  --table-name my-dynamodb-table --item \'{    "id": {"S": "ruan.bekker"},    "name": {"S": "ruan"},    "surname": {"S": "bekker"},    "country": {"S": "south africa"},    "age": {"N": "32"}}

$ curl https://xx.execute-api.eu-west-1.amazonaws.com/dev/person{"id":"ruan.bekker","surname":"bekker","name":"ruan","country":"south africa","age":32}

$ mkdir -p ~/dev/lambda-to-openfaas-migration \  && cd ~/dev/lambda-to-openfaas-migration$ faas-cli new \  --lang node person \  --prefix=ruanbekker \  --gateway https://openfaas.ruan.dev$ mv person.yml stack.yml

$ faas-cli secret create my-aws-secret-key --from-literal="your-access-key"$ faas-cli secret create my-aws-access-key --from-literal="your-secret-key"

$ cat person/package.json{  "name": "function",  "version": "1.0.0",  "description": "",  "main": "handler.js",  "scripts": {    "test": "echo \"Error: no test specified\" && exit 1"  },  "keywords": [],  "author": "",  "license": "ISC",  "dependencies": {    "aws-sdk": "latest"  }}

$ cat stack.ymlprovider:  name: openfaas  gateway: https://openfaas.ruan.devfunctions:  person:    lang: node    handler: ./person    image: ruanbekker/person:latest    environment:      content_type: application/json      DYNAMODB_TABLE: my-dynamodb-table      AWS_REGION: eu-west-1    secrets:      - my-aws-access-key      - my-aws-secret-key

$ mkdir aws-lambda \  && cd aws-lambda$ lambda_url=$(aws lambda get-function --function-name serverless-rest-api-with-dynamodb-dev-get  | jq -r .Code.Location)$ curl -o deployment_package.zip "${lambda_url}"

$ unzip deployment_package.zip$ cd ..$ mv aws-lambda/function/handler.js person/handler.js

$ cat person/handler.js'use strict';const fs = require('fs');const secretAK = "/var/openfaas/secrets/my-aws-access-key";const secretSK = "/var/openfaas/secrets/my-aws-secret-key";const accessKey = fs.readFileSync(secretAK, "utf-8");const secretKey = fs.readFileSync(secretSK, "utf-8");const AWS = require('aws-sdk');AWS.config.update({  credentials: new AWS.Credentials ({    region: process.env.AWS_REGION,    accessKeyId: accessKey,    secretAccessKey: secretKey  })})const dynamoDb = new AWS.DynamoDB.DocumentClient();module.exports = (context, callback) => {  const params = {    TableName: process.env.DYNAMODB_TABLE,    Key: {      id: 'ruan.bekker',    },  };  dynamoDb.get(params, (error, result) => {    if (error) {      console.error(error);      callback(null, {        statusCode: error.statusCode || 501,        headers: { 'Content-Type': 'text/plain' },        body: 'GetItem Failed',      });      return;    }    const response = result.Item;    callback(null, response);  });};

$ export OPENFAAS_URL=https://openfaas.ruan.dev$ faas-cli upDeploying: person.Deployed. 202 Accepted.URL: https://openfaas.ruan.dev/function/person

$ curl https://openfaas.ruan.dev/function/person{"id":"ruan.bekker","surname":"bekker","name":"ruan","country":"south africa","age":32}