Couldn't start client Lua from VSCode devcontainer

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Linux

What is the issue affecting?

Other

Expected Behaviour

Lua language server starts correctly.

Actual Behaviour

I see this message when opening a Lua file, and language linting is not available:

Reproduction steps

1. Add a Dockerfile in .devcontainer folder, I'm using this:

   FROM python:3.8-alpine as build
   
   LABEL description="Dev container - test-sumneko"
   
   ARG USERNAME=vscode
   ARG USER_UID=1000
   ARG USER_GID=$USER_UID
   
   RUN addgroup -g $USER_GID $USERNAME && adduser -D -u $USER_UID -G $USERNAME $USERNAME
   USER $USERNAME
   
   CMD ["sh"]
   

2. Specify sumneko extension in devcontainer.json:

   {
       "customizations": {
           "vscode": {
               "extensions": [
                   "sumneko.lua"
               ]
           }
       }
   }
   

3. Do Rebuild and Reopen in Container from command palette

4. Open any .lua file in the workspace

Additional Notes

lua-language-server seems there but it gives a strange not found error when launched:

/workspaces/test-sumneko $ /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server 
/bin/ash: /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: not found
/workspaces/test-sumneko $ ls -la /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server 
-rwxrwxrwx    1 vscode   vscode     2068664 Nov 21 11:24 /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server

As current workaround I'm adding this in Dockerfile:

RUN apk add --update --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing/ lua-language-server

and this in devcontainer.json:

"postCreateCommand": "sleep 10 && rm -vf /home/vscode/.vscode-server/extensions/sumneko.lua-*/server/bin/Linux/lua-language-server && ln -s /usr/bin/lua-language-server /home/vscode/.vscode-server/extensions/sumneko.lua-*/server/bin/Linux/",

Version used: sumneko.lua-2.5.3

UPDATE

Looking around, seems this is the root cause:

this can happen if binary is linked with a libc that doesn't exist on your device.

In fact:

/workspaces/test-sumneko $ ldd
musl libc (x86_64)
Version 1.2.4
Dynamic Program Loader
Usage: /lib/ld-musl-x86_64.so.1 [options] [--] pathname
/workspaces/test-sumneko $ ldd /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server
        /lib64/ld-linux-x86-64.so.2 (0x7fd02de67000)
        libm.so.6 => /lib64/ld-linux-x86-64.so.2 (0x7fd02de67000)
        libdl.so.2 => /lib64/ld-linux-x86-64.so.2 (0x7fd02de67000)
        libpthread.so.0 => /lib64/ld-linux-x86-64.so.2 (0x7fd02de67000)
        libc.so.6 => /lib64/ld-linux-x86-64.so.2 (0x7fd02de67000)
Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server)
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __longjmp_chk: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __fprintf_chk: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __printf_chk: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __strftime_l: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __memcpy_chk: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __sprintf_chk: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __snprintf_chk: symbol not found
Error relocating /home/vscode/.vscode-server/extensions/sumneko.lua-2.5.3/server/bin/Linux/lua-language-server: __fdelt_chk: symbol not found

Log File

No log file available.

提供された Alpine Dockerfile と devcontainer.json を使って失敗を再現し、その後、server/bin/Linux/lua-language-server にある拡張機能のバイナリと、その libc 依存関係を調査します。Linux アーティファクトを musl 環境と比較します。この devcontainer で、パッケージのインストールとシンボリックリンクの workaround なしに Lua language server が起動すれば完了です。