bcrypt和Docker bcrypt_lib.node：无效的ELF标头

Question

我在Node.js上看到了几个关于macOS，Docker和bcrypt的问题。 This似乎是我的问题最接近的答案，但它没有奏效。

我的Dockerfile：

FROM node:6.4.0

COPY . /app
RUN ls -la /app
WORKDIR /app

RUN cd /app; npm install
CMD ["node", "index.js"]

我的.dockerignore文件：

node_modules

我的package.json依赖项：

"dependencies": {
  "bcrypt": "1.0.0",
}

启动容器时，我收到此错误：

/app/node_modules/bcrypt/build/Release/bcrypt_lib.node: invalid ELF header

从ls -la /app中的Dockerfile命令，我可以看到node_modules文件夹绝对不是从主机（macOS）复制的：

drwxr-xr-x  6 root root  4096 Dec  7 21:29 .
drwxr-xr-x 47 root root  4096 Dec  7 21:29 ..
-rw-r--r--  1 root root   763 Dec  7 20:55 .dockerignore
-rw-r--r--  1 root root   122 Dec  7 21:18 Dockerfile
rw-r--r--  1 root root 13525 Dec  7 19:43 index.js
-rw-r--r--  1 root root   947 Dec  7 21:28 package.json

bcrypt npm install日志：

> [email protected] install /app/node_modules/bcrypt
> node-pre-gyp install --fallback-to-build

node-pre-gyp info it worked if it ends with ok
node-pre-gyp info using [email protected]
node-pre-gyp info using [email protected] | linux | x64
node-pre-gyp info check checked for "/app/node_modules/bcrypt/lib/binding/bcrypt_lib.node" (not found)
node-pre-gyp http GET https://github.com/kelektiv/node.bcrypt.js/releases/download/v1.0.0/bcrypt_lib-v1.0.0-node-v48-linux-x64.tar.gz
node-pre-gyp http 404 https://github.com/kelektiv/node.bcrypt.js/releases/download/v1.0.0/bcrypt_lib-v1.0.0-node-v48-linux-x64.tar.gz
node-pre-gyp ERR! Tried to download: https://github.com/kelektiv/node.bcrypt.js/releases/download/v1.0.0/bcrypt_lib-v1.0.0-node-v48-linux-x64.tar.gz
node-pre-gyp ERR! Pre-built binaries not found for [email protected] and [email protected] (node-v48 ABI) (falling back to source compile with node-gyp)
node-pre-gyp http Pre-built binary not available for your system, looked for https://github.com/kelektiv/node.bcrypt.js/releases/download/v1.0.0/bcrypt_lib-v1.0.0-node-v48-linux-x64.tar.gz
gyp info it worked if it ends with ok
gyp info using [email protected]
gyp info using [email protected] | linux | x64
gyp info ok
gyp info it worked if it ends with ok
gyp info using [email protected]
gyp info using [email protected] | linux | x64
gyp info spawn /usr/bin/python2
gyp info spawn args [ '/usr/local/lib/node_modules/npm/node_modules/node-gyp/gyp/gyp_main.py',
gyp info spawn args   'binding.gyp',
gyp info spawn args   '-f',
gyp info spawn args   'make',
gyp info spawn args   '-I',
gyp info spawn args   '/app/node_modules/bcrypt/build/config.gypi',
gyp info spawn args   '-I',
gyp info spawn args   '/usr/local/lib/node_modules/npm/node_modules/node-gyp/addon.gypi',
gyp info spawn args   '-I',
gyp info spawn args   '/root/.node-gyp/6.4.0/include/node/common.gypi',
gyp info spawn args   '-Dlibrary=shared_library',
gyp info spawn args   '-Dvisibility=default',
gyp info spawn args   '-Dnode_root_dir=/root/.node-gyp/6.4.0',
gyp info spawn args   '-Dnode_gyp_dir=/usr/local/lib/node_modules/npm/node_modules/node-gyp',
gyp info spawn args   '-Dnode_lib_file=node.lib',
gyp info spawn args   '-Dmodule_root_dir=/app/node_modules/bcrypt',
gyp info spawn args   '--depth=.',
gyp info spawn args   '--no-parallel',
gyp info spawn args   '--generator-output',
gyp info spawn args   'build',
gyp info spawn args   '-Goutput_dir=.' ]
gyp info ok
gyp info it worked if it ends with ok
gyp info using [email protected]
gyp info using [email protected] | linux | x64
gyp info spawn make
gyp info spawn args [ 'BUILDTYPE=Release', '-C', 'build' ]
make: Entering directory '/app/node_modules/bcrypt/build'
  CXX(target) Release/obj.target/bcrypt_lib/src/blowfish.o
  CXX(target) Release/obj.target/bcrypt_lib/src/bcrypt.o
  CXX(target) Release/obj.target/bcrypt_lib/src/bcrypt_node.o
  SOLINK_MODULE(target) Release/obj.target/bcrypt_lib.node
  COPY Release/bcrypt_lib.node
  COPY /app/node_modules/bcrypt/lib/binding/bcrypt_lib.node
  TOUCH Release/obj.target/action_after_build.stamp
make: Leaving directory '/app/node_modules/bcrypt/build'
gyp info ok
node-pre-gyp info ok

更新：我试图在容器内运行bcrypt似乎工作正常：

docker run identity file /app/node_modules/bcrypt/build/Release/bcrypt_lib.node
/app/node_modules/bcrypt/build/Release/bcrypt_lib.node: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=2a9d4a04f6f9c548f8035b9b737c1efac5d774d2, not stripped

Answer 1

comment from Stefan Scherer表明我的问题中的代码是有效的，应该可以工作并让我搜索问题的其他原因。

最后我发现它是由docker-compose.yml引起的，它启动了容器作为多种服务的一部分。

问题是由容器的volume条目引起的：

volumes :
- ../identity/:/app

因此，来自主机的node_modules文件夹再次被映射到容器中，并且bcrypt ELF头部确实再次无效。

解决方案是从映射中排除node_modules文件夹（如here所述）：

volumes :
    /app/node_modules/