node.js - 在 Docker : Libpq dependency Exec format error 中将 sequelize 与 Postgresql 一起使用

Question

我正在尝试从带有 Sequelize 的 Dockerized Node 应用程序连接到 Azure 上托管的 PostgreSQL 数据库。但是，我收到一个错误，即在容器中运行时找不到 libpq 依赖项。它在我的本地机器上运行良好。

(node:40) UnhandledPromiseRejectionWarning: Error: Error loading shared library /usr/app/node_modules/libpq/build/Release/addon.node: Exec format error
    at Object.Module._extensions..node (internal/modules/cjs/loader.js:1122:18)

我发现了一些类似的错误，并在 Dockerfile 中尝试了不同的方法以确保依赖项加载失败。我还确保我的 Node 版本在我的本地机器和 Docker 容器中匹配。

FROM node:14-alpine

WORKDIR /usr/app

COPY package*.json ./
RUN \
    apk add --no-cache g++ make python3 postgresql-libs

RUN \
    apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev && \
    npm install libpq && \
    apk --purge del .build-deps  

COPY . .

CMD ["npm", "start"]

这是我的 docker-compose.yml

version: "3.8"
services:
  api:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - .:/usr/app
    ports:
      - "3000:3000"

docker-compose.dev.yml

version: "3.8"
services:
  api:
    command: npm run dev
    environment:
      - NODE_ENV=development

运行以下命令来构建镜像并启动容器:

docker-compose -f docker-compose.yml -f docker-compose.dev.yml up

libpq 依赖来自这样一个事实，即我需要在 sequeqlgze 连接中使用 native: true 来强制执行 SSH。这需要 pg-native 包。

// PostgreSQL connection
exports.connect = async () => {
  const sequelize = new Sequelize(
    config.DATABASE_NAME,
    config.DB_USERNAME,
    config.DB_PASSWORD,
    {
      host: config.DB_HOSTNAME,
      port: config.DB_PORT,
      dialect: "postgres",
      native: true, // enables ssl
    }
  );

相关资源
https://github.com/nodejs/node-gyp/issues/1855
Using Docker with nodejs with node-gyp dependencies
构建镜像时的 Docker 日志

Step 5/7 : RUN     apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev &&     npm install libpq &&     apk --purge del .build-deps
 ---> Running in 20f7406e6abc
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/community/x86_64/APKINDEX.tar.gz
(1/4) Installing pkgconf (1.6.3-r0)
(2/4) Installing openssl-dev (1.1.1g-r0)
(3/4) Installing postgresql-dev (12.5-r0)
(4/4) Installing .build-deps (20201207.093711)
Executing busybox-1.31.1-r9.trigger
OK: 243 MiB in 47 packages

> libpq@1.8.9 install /usr/app/node_modules/libpq
> node-gyp rebuild

make: Entering directory '/usr/app/node_modules/libpq/build'
  CXX(target) Release/obj.target/addon/src/connection.o
  CXX(target) Release/obj.target/addon/src/connect-async-worker.o
  CXX(target) Release/obj.target/addon/src/addon.o
In file included from ../../nan/nan.h:56,
                 from ../src/addon.h:4,
                 from ../src/addon.cc:1:
/root/.cache/node-gyp/14.15.1/include/node/node.h:758:43: warning: cast between incompatible function types from 'void (*)(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE)' {aka 'void (*)(v8::Local<v8::Object>)'} to 'node::addon_register_func' {aka 'void (*)(v8::Local<v8::Object>, v8::Local<v8::Value>, void*)'} [-Wcast-function-type]
  758 |       (node::addon_register_func) (regfunc),                          \
      |                                           ^
/root/.cache/node-gyp/14.15.1/include/node/node.h:792:3: note: in expansion of macro 'NODE_MODULE_X'
  792 |   NODE_MODULE_X(modname, regfunc, NULL, 0)  // NOLINT (readability/null_usage)
      |   ^~~~~~~~~~~~~
../src/addon.cc:76:1: note: in expansion of macro 'NODE_MODULE'
   76 | NODE_MODULE(addon, InitAddon)
      | ^~~~~~~~~~~
  SOLINK_MODULE(target) Release/obj.target/addon.node
  COPY Release/addon.node
make: Leaving directory '/usr/app/node_modules/libpq/build'

> nodemon@2.0.6 postinstall /usr/app/node_modules/nodemon
> node bin/postinstall || exit 0

Love nodemon? You can now support the project via the open collective:
 > https://opencollective.com/nodemon/donate

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.3 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ libpq@1.8.9
added 222 packages from 187 contributors and audited 224 packages in 13.185s

12 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

WARNING: Ignoring APKINDEX.70f61090.tar.gz: No such file or directory
WARNING: Ignoring APKINDEX.ca2fea5b.tar.gz: No such file or directory
(1/4) Purging .build-deps (20201207.093711)
(2/4) Purging postgresql-dev (12.5-r0)
(3/4) Purging openssl-dev (1.1.1g-r0)
(4/4) Purging pkgconf (1.6.3-r0)
Executing busybox-1.31.1-r9.trigger
OK: 233 MiB in 43 packages
Removing intermediate container 20f7406e6abc
 ---> 86a68c654898
Step 6/7 : COPY . .

Answer 1

谢谢大卫!看起来我没有在 docker-compose.yml 文件中保留 node_modules 。
在卷中添加:- /usr/app/node_modules 就成功了!

version: "3.8"
services:
  api:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - .:/usr/app
      - /usr/app/node_modules
    ports:
      - "3000:3000"