Can't run in Docker Alpine

/usr/local/bin $ ./TwitchDownloaderCLI
/bin/sh: ./TwitchDownloaderCLI: not found

Is there some kind of .net/mono runtime i need to install, since i guess it’s made in c#? A basic alpine linux install doesn’t seem to be able to run this.

[Zibbp]

If anyone else has this issue and wants to run TwitchDownloader in an Alpine container I got it running by installing the following .net dependencies according to Microsoft’s documentation.

apk add bash icu-libs krb5-libs libgcc libintl libssl1.1 libstdc++ zlib

Here is my Dockerfile I created to run TwitchDownloader. I install the .net dependencies and ffmpeg. I also install the Inter font which Twitch uses so the chat render looks the same.

By default Alpine does not come with standard fonts so you will need to either install the default TwitchDownloader font or specify a custom one when rendering the chat with --font Inter. More information can be found on Alpine’s wiki

FROM alpine:3.13

RUN apk update && apk add bash icu-libs krb5-libs libgcc libintl libssl1.1 libstdc++ zlib ffmpeg

RUN mkdir /root/.fonts

ADD ./Inter.otf /root/.fonts/

WORKDIR /usr/bin

RUN wget https://github.com/lay295/TwitchDownloader/releases/download/1.39.5/TwitchDownloaderCLI-LinuxAlpine-x64.zip && unzip TwitchDownloaderCLI-LinuxAlpine-x64.zip && chmod +x TwitchDownloaderCLI && rm TwitchDownloaderCLI-LinuxAlpine-x64.zip

WORKDIR /opt/app

CMD [ "TwitchDownloaderCLI" ]

The final image is about 170 megabytes. The same implementation using a debian:slim image is 500 megabytes.

[MrBrax]

Is there a reason you can’t use a debian based linux distro?

Not really, it’s just that alpine is tiny and is commonly used in docker. Probably too much effort to get working.