I am working on a small nodejs (nodejs v4.3) project that is using node-serialport https://github.com/voodootikigod/node-serialport. I wrapped it in a docker image. First I successfully used debian as a base image but it had a total size of about 600MB. Then I switched to alpine linux https://hub.docker.com/_/alpine/ and achieved 100MB of image size. However the nodejs project stopped working with alpine as base image. Here are some logs:
Install node-serialport log:
> [email protected] install /app/node_modules/serialport
> node-pre-gyp install --fallback-to-build
[serialport] Success: "/app/node_modules/serialport/build/Release/node-v46-linux-x64/serialport.node" is installed via remote
[email protected] node_modules/serialport
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected] ([email protected])
├── [email protected]
└── [email protected] ([email protected], [email protected])
When I try to open a serial port I get an error:
npm ERR! Linux 3.19.0-30-generic
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "start"
npm ERR! node v4.3.0
npm ERR! npm v2.14.12
npm ERR! code ELIFECYCLE
npm ERR! [email protected] start: `node ./bin/www`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script 'node ./bin/www'.
npm ERR! This is most likely a problem with the app package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node ./bin/www
npm ERR! You can get their info via:
npm ERR! npm owner ls app
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /app/app/npm-debug.log
module.js:435
return process.dlopen(module, path._makeLong(filename));
^
Error: Error relocating /app/app/node_modules/serialport/build/Release/node-v46-linux-x64/serialport.node: __strcpy_chk: symbol not found
at Error (native)
at Object.Module._extensions..node (module.js:435:18)
at Module.load (module.js:344:32)
at Function.Module._load (module.js:301:12)
at Module.require (module.js:354:17)
at require (internal/module.js:12:17)
at Object.<anonymous> (/app/app/node_modules/serialport/serialport.js:14:25)
at Module._compile (module.js:410:26)
at Object.Module._extensions..js (module.js:417:10)
at Module.load (module.js:344:32)
As I said, with debian as base image it worked. I think it could be related to the fact that alpine linux is missing something that node-serialport depends on. I created an issue on https://github.com/voodootikigod/node-serialport/issues/682 but I am not sure if this is a problem with node-serialport or with alpine linux. I read about node-pre-gyp being buggy on alpine/busybox.
https://github.com/voodootikigod/node-serialport/pull/710
Alpine is a (very) small distro, but it uses the musl standard library instead of glibc (that most other Linux distros use), so it requires compilation.
# If you don't have node/npm already, add that first
sudo apk add --no-cache nodejs
# Add the necessary build and runtime dependencies
sudo apk add --no-cache make gcc g++ python linux-headers udev
# Then we can install serialport, forcing it to compile
npm install serialport --build-from-source=serialport
I tested it. It solves the problem.