找不到模块“画布” 需要堆栈： - /var/task/index.js - /var/runtime/index.mjs

Question

我正在使用无服务器框架制作 lambda 函数。该函数使用chartjs-node-canvas生成图形，我使用的是macbook，它在本地正常工作。当我直接或通过代码构建部署到 AWS 时，我遇到了错误：

{
    "errorType": "Error",
    "errorMessage": "Cannot find module 'canvas'\nRequire stack:\n- /var/task/index.js\n- /var/runtime/index.mjs",
    "code": "MODULE_NOT_FOUND",
    "requireStack": [
        "/var/task/index.js",
        "/var/runtime/index.mjs"
    ],
    "stack": [
        "Error: Cannot find module 'canvas'",
        "Require stack:",
        "- /var/task/index.js",
        "- /var/runtime/index.mjs",
        "    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:1026:15)",
        "    at Function.resolve (node:internal/modules/cjs/helpers:114:19)",
        "    at fu (/var/task/index.js:1:663)",
        "    at new ln (/var/task/index.js:3:37199)",
        "    at Am (/var/task/index.js:58:1375)",
        "    at processTicksAndRejections (node:internal/process/task_queues:96:5)",
        "    at async Runtime.Dm [as handler] (/var/task/index.js:58:2652)"
    ]
}

我尝试过使用图层但不能，也许我做错了。 Chartjs-node-canvas 库依赖于 canvas 库，错误发生在哪里。

我的serverless.yml：

service: report-infra-costs

provider:
  name: aws
  runtime: nodejs16.x
  memorySize: 128
  stage: ${opt:stage, env:STAGE, 'prd'}
  timeout: 500
  region: us-east-1
  versionFunctions: false

  iamRoleStatements:
  - Effect: Allow
    Action:
      - cloudformation:DescribeStacks
      - ce:GetCostAndUsage
      - ce:DescribeAccount
      - ce:GetDimensionValues
      - organizations:DescribeAccount
    Resource: "*"

functions: 
  sendInfraCosts:
  handler: index.sendReportInfraCosts
  events:
    - schedule: cron(0 8 ? * MON *)

custom: 
  esbuild:
  bundle: true
  minify: true
  exclude: ['aws-sdk']

plugins:
  - serverless-esbuild
  - serverless-offline

我的buildspec.yml：

version: 0.2

phases:
  install:
    runtime-versions:
      nodejs: 16.x
  pre_build:
    commands:
      - npm install -g serverless
      - npm install
  build:
    commands:
      - serverless deploy --stage ${STAGE} --verbose

请帮我解决这个问题

Answer 1

出现此问题是因为

node-canvas

依赖于系统二进制文件。如果您在 Windows 或 Mac 上运行代码并将其部署到使用 Ubuntu 的 AWS Lambda，您将遇到兼容性问题。

要解决此问题，您需要为

node-canvas

创建 Lambda 层：

1. 利用

   lambda-layer-canvas-nodejs

   层。使用 Lambda Layer Canvas Node.js.
   中提供的模板部署该层

2. 从 AWS Lambda 控制台复制该层的 ARN。

3. 通过添加图层 ARN 来更新您的

   serverless.yml

   文件：

service: report-infra-costs

provider:
  name: aws
  runtime: nodejs16.x
  memorySize: 128
  stage: ${opt:stage, env:STAGE, 'prd'}
  layers:
    - arn:aws:lambda:us-east-1:<account-id>:layer:canvas-nodejs:1 # Replace with your layer ARN
  timeout: 500
  region: us-east-1
  versionFunctions: false

iamRoleStatements:
  - Effect: Allow
    Action:
      - cloudformation:DescribeStacks
      - ce:GetCostAndUsage
      - ce:DescribeAccount
      - ce:GetDimensionValues
      - organizations:DescribeAccount
    Resource: "*"

functions: 
  sendInfraCosts:
    handler: index.sendReportInfraCosts
    events:
      - schedule: cron(0 8 ? * MON *)

custom: 
  esbuild:
    bundle: true
    minify: true
    exclude: ['aws-sdk', 'canvas']   # Add canvas here  

plugins:
  - serverless-esbuild
  - serverless-offline