Docker alpine support

[FerLuisxd]

Hello I've been trying to run this package with a docker image but when I try to run it I get this error:

/src/node_modules/uWebSockets.js/uws.js:31
                throw new Error('This version of µWS is not compatible with your Node.js build:\n\n' + e.toString());
                ^

Error: This version of µWS is not compatible with your Node.js build:

Error: Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /src/node_modules/uWebSockets.js/uws_linux_x64_72.node)
    at /src/node_modules/uWebSockets.js/uws.js:31:9
    at Object.<anonymous> (/src/node_modules/uWebSockets.js/uws.js:33:3)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.Module._load (internal/modules/cjs/loader.js:879:14)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/src/index.js:1:13)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)

This is my dockerfile

FROM node:lts-alpine
RUN apk --no-cache add git
WORKDIR /src
COPY package*.json ./

RUN npm install
COPY . .
EXPOSE 9001
CMD ["npm","start"]

[dalisoft]

@FerLuisxd See #26 as this issue is Pinned in issues 😉

[ghost]

You are free to compile the sources for any platform you like, but the pre-compiled Linux binaries require glibc. Alpine is a muslc dist unlike 99% of Linux dists.

[ghost]

Yeah or just busybox:glibc, it is smaller than Alpine and still comes with a proper glibc which does have the memchr SIMD implementation which the HTTP parser of uWS relies on.

[FerLuisxd]

So what distro would you recommend for a server? (Both small and that has a proper glibc)

[e3dio]

The comment directly above yours answers your question

[FerLuisxd]

Nice thanks

[ghost]

Even regular ubuntu image is only 70mb. Slap Node.js and uWS.js on there and you're way above 70 anyways.

[buildscientist]

@FerLuisxd
Not sure if you were able to get this running or not but if you install the libc6-compat package in Alpine and create a symlink from libc.musl-x86_64.so.1 to ld-linux-x86-64.so.2 you should be able to run uWebsockets in an Alpine based container.

Here's a snippet of what I'm doing in my Dockerfile:

RUN apk add --no-cache libc6-compat 
RUN ln -s /lib/libc.musl-x86_64.so.1 /lib/ld-linux-x86-64.so.2

[rafaelpernil2]

I confirm this snippet also works in a Raspberry Pi 4 (armhf)

[b0o]

I was running into this error. It turned out not to be an issue with the platform I was running on (I am using the official node:18 image), but rather that my build process wasn't copying the './uws_' + process.platform + '_' + process.arch + '_' + process.versions.modules + '.node' file to my dist.

I added this to my build script and it fixed the issue: cp node_modules/uWebSockets.js/*.node dist/

[ftntming]

It does not work for me.

[uNetworkingAB]

Alpine isn't even a supported platform for Node.js itself

Operating System	Architectures	Versions	Support Type	Notes
GNU/Linux	x64	kernel >= 3.10, musl >= 1.1.19	Experimental	e.g. Alpine 3.8