AWS Lambda无法找到@elastic/elasticsearch包问题求助

问题描述 #

在AWS Lambda中运行代码时触发错误：Cannot find package '@elastic/elasticsearch' imported from /var/task/index.mjs，即使尝试添加Elasticsearch Layer到Lambda函数后，仍出现相同错误。

已执行的操作 #

• npm install @elastic/elasticsearch
• mkdir -p my-layer/nodejs/node_modules
• cp -r node_modules/@elastic my-layer/nodejs/node_modules
• zip -r my-layer.zip my-layer
• 创建Layer并关联到Lambda函数

错误堆栈追踪 #

undefined   ERROR   Uncaught Exception  {"errorType":"Error","errorMessage":"Cannot find package '@elastic/elasticsearch' imported from /var/task/index.mjs","code":"ERR_MODULE_NOT_FOUND","stack":["Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@elastic/elasticsearch' imported from /var/task/index.mjs","    at new NodeError (node:internal/errors:405:5)","    at packageResolve (node:internal/modules/esm/resolve:965:9)","    at moduleResolve (node:internal/modules/esm/resolve:1022:20)","    at moduleResolveWithNodePath (node:internal/modules/esm/resolve:876:12)","    at defaultResolve (node:internal/modules/esm/resolve:1242:79)","    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:403:12)","    at ModuleLoader.resolve (node:internal/modules/esm/loader:372:25)","    at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:249:38)","    at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:76:39)","    at link (node:internal/modules/esm/module_job:75:36)"]}
INIT_REPORT Init Duration: 196.17 ms    Phase: init Status: error   Error Type: Runtime.ExitError
2024-04-06T07:39:53.096Z    undefined   ERROR   Uncaught Exception  {"errorType":"Error","errorMessage":"Cannot find package '@elastic/elasticsearch' imported from /var/task/index.mjs","code":"ERR_MODULE_NOT_FOUND","stack":["Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@elastic/elasticsearch' imported from /var/task/index.mjs","    at new NodeError (node:internal/errors:405:5)","    at packageResolve (node:internal/modules/esm/resolve:965:9)","    at moduleResolve (node:internal/modules/esm/resolve:1022:20)","    at moduleResolveWithNodePath (node:internal/modules/esm/resolve:876:12)","    at defaultResolve (node:internal/modules/esm/resolve:1242:79)","    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:403:12)","    at ModuleLoader.resolve (node:internal/modules/esm/loader:372:25)","    at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:249:38)","    at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:76:39)","    at link (node:internal/modules/esm/module_job:75:36)"]}

问题原因 #

你创建Layer时的目录结构不符合Lambda Node.js运行时的依赖加载规则。仅复制@elastic目录到my-layer/nodejs/node_modules下，会导致包的元数据（如package.json）无法被Node.js的ESM模块解析器正确识别，进而触发找不到包的错误。

正确的Layer创建步骤 #

1. 创建符合规范的Layer目录并安装依赖：

   # 创建Layer基础目录
   mkdir -p my-layer/nodejs
   # 进入nodejs目录初始化npm
   cd my-layer/nodejs
   npm init -y
   # 安装@elastic/elasticsearch包
   npm install @elastic/elasticsearch
   # 返回上级目录
   cd ../..
   

2. 打包Layer：

   zip -r my-layer.zip my-layer/
   

3. 将打包后的my-layer.zip上传为AWS Lambda Layer，并在目标Lambda函数的配置中关联该Layer。

额外检查要点 #

• 确保本地安装依赖时使用的Node.js版本与Lambda函数配置的运行时版本一致，避免因版本差异导致的兼容性问题。
• 验证Lambda函数的Layers配置，确认目标Layer已成功关联且版本正确。
• 如果你使用ESM模块（.mjs文件），确保导入语句格式正确：

  import { Client } from '@elastic/elasticsearch';
  

内容的提问来源于stack exchange，提问作者Shamitha Reddy Regenti