Flow-bin exiting with ENOENT in alpine docker container

[mightyguava]

I have flow working just fine in a project running locally on a Mac, but trying to run this on the official Node alpine base image is not working. Error and minimal repro steps pasted below.

I think #1605 fixes compilation of flow in a docker container, and I'm able to build a working flow binary following instructions there, but it'd be nice if the yarn installed flow could either "just work", or only requiring installing some os-dependencies, versus building flow from scratch.

Error with yarn installed flow

# Start a container
docker run -ti --rm node:7.8.0-alpine sh
# Now in container
mkdir test
cd test
yarn init
yarn add flow flow-bin --dev
yarn run flow

Errors:

yarn run v0.21.3
$ "/test/node_modules/.bin/flow"
events.js:163
      throw er; // Unhandled 'error' event
      ^

Error: spawn /test/node_modules/flow-bin/flow-linux64-v0.42.0/flow ENOENT
    at exports._errnoException (util.js:1034:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
    at onErrorNT (internal/child_process.js:367:16)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)
    at Module.runMain (module.js:607:11)
    at run (bootstrap_node.js:423:7)
    at startup (bootstrap_node.js:147:9)
    at bootstrap_node.js:538:3
error Command failed with exit code 1.

workaround (partial): To build flow in alpine node, in case this is useful to anyone

FROM node:7.7.2-alpine
RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories \
  && echo "http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories \
  && apk --no-cache add \
     alpine-sdk \
     ocaml \
     ocamlbuild \
     libelf \
     libelf-dev \
     ncurses \
     inotify-tools \
     linux-headers \
     git \
     bash \
     diffutils \
  && git clone --depth 1 https://github.com/facebook/flow.git /tmp/flow \
  && cd /tmp/flow \
  && make \
  && cp bin/flow /usr/bin/flow \
  && apk --no-cache del \
     alpine-sdk \
     ocaml \
     ocamlbuild \
     libelf-dev \
     ncurses \
     inotify-tools \
     linux-headers \
     git \
     bash \
     diffutils \
  && cd / \
  && rm -rf /tmp/flow

[montogeek]

Funny, I am trying to do the same, the problem is that this dep is missing:
Error loading shared library libelf.so.1,
I am unable to install it

[mightyguava]

@montogeek did that come from the apk add libelf? I had libelf installed and the flow binary from npm still didn't work for me

[montogeek]

@mightyguava I tried with ocaml, libelf, libelf-dev without luck, I gave up and switched to Debian: https://hub.docker.com/r/montogeek/docker-yarn-flow/

[izumin5210]

elfutils-libelf seems to contain libelf.so.1. https://pkgs.alpinelinux.org/contents?file=&path=&name=elfutils-libelf&branch=edzge&repo=main&arch=x86_64
I tried with elfutils-dev, elfutils-dev, libelf but still didn't work...

[montogeek]

@izumin5210 So, Flow is running after installing elfutils-libelf?

[vkurchatkin]

libc might be the culprit, binaries compiled against glibc don't work on alpine

[xdissent]

It's definitely glibc. I tried the alpine glibc-compat stuff too but ultimately gave up. For building, the correct packages are elfutils-* not libelf-*:

FROM node:alpine

ENV FLOW_VERSION 0.43.1

RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/main" >> /etc/apk/repositories \
  && echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories \
  && echo "http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories \
  && apk add --no-cache --virtual .build-deps-flow \
     alpine-sdk \
     bash \
     diffutils \
     elfutils-dev \
     git \
     linux-headers \
     ncurses \
     ocaml \
     ocamlbuild \
  && git clone --depth 1 --branch "v$FLOW_VERSION" https://github.com/facebook/flow.git \
  && cd flow \
  && make test \
  && cp bin/flow /usr/bin/flow \
  && apk del .build-deps-flow \
  && apk add --no-cache elfutils-libelf \
  && cd .. \
  && rm -rf flow

Change make test to make if you don't care about tests. Random note: the tests fail if you build in /tmp/flow because it writes some test fixtures under that folder, and they accidentally find flow's own .flowconfig when they shouldn't.

[Vrtak-CZ]

I'm just trying docker file posted by @xdissent with 0.45.0 and after I added ocaml-findlib to build-deps it fails with error:

ocamlfind ocamldep -package sedlex -modules src/flow.ml > src/flow.ml.depends
+ ocamlfind ocamldep -package sedlex -modules src/flow.ml > src/flow.ml.depends
ocamlfind: Package `sedlex' not found

😢

[xdissent]

Here's an updated Dockerfile for 0.45.0. I'm unfamiliar with opam but I think adding a rm -rf ~/.opam might clean up some files that aren't needed after compilation.

FROM node:alpine

ENV FLOW_VERSION 0.45.0

RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/main" >> /etc/apk/repositories \
  && echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories \
  && echo "http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories \
  && apk add --no-cache --virtual .build-deps-flow \
     alpine-sdk \
     bash \
     diffutils \
     elfutils-dev \
     git \
     linux-headers \
     m4 \
     ncurses \
     ocaml \
     opam \
  && opam init -y \
  && eval `opam config env` \
  && opam update \
  && opam install -y ocamlfind sedlex \
  && git clone --depth 1 --branch "v$FLOW_VERSION" https://github.com/facebook/flow.git \
  && cd flow \
  && yarn \
  && make test \
  && cp bin/flow /usr/bin/flow \
  && apk del .build-deps-flow \
  && apk add --no-cache elfutils-libelf \
  && cd .. \
  && rm -rf flow

[Vrtak-CZ]

@xdissent thx

[xdissent]

Now that v0.48.0 doesn't need libelf, flow works with alpine-pkg-glibc (no compilation required).

Install flow normally (binary release or flow-bin) and run:

$ wget -O /etc/apk/keys/sgerrand.rsa.pub https://raw.githubusercontent.com/sgerrand/alpine-pkg-glibc/master/sgerrand.rsa.pub
$ wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.25-r0/glibc-2.25-r0.apk
$ apk add glibc-2.25-r0.apk

[xjunior]

I'm still having that issue running in a node:8.9-alpine container. Is alpine-pkg-glibc still required?