How to build in docker Alpine Linux Leave feedback
To build an web API which is using GroupDocs.Conversion for .NET in docker container with Alpine Linux use this sample Docker file:
FROM mcr.microsoft.com/dotnet/aspnet:6.0-alpine AS base
WORKDIR /app
EXPOSE 80
ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
RUN apk add --no-cache icu-libs krb5-libs libgcc libintl libssl1.1 libstdc++ zlib
RUN apk add --no-cache ffmpeg libgdiplus
RUN apk add --no-cache msttcorefonts-installer fontconfig
RUN update-ms-fonts && fc-cache fc-cache -f
FROM mcr.microsoft.com/dotnet/sdk:6.0-alpine AS build
WORKDIR /src
COPY ["YourApi/YourApi.csproj", "TestApi/"]
RUN dotnet restore "YourApi/YourApi.csproj"
COPY . .
WORKDIR "/src/YourApi"
RUN dotnet build "YourApi.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "YourApi.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "YourApi.dll"]
As you can see the process is the same as building a regular web API project in docker. The main difference is the installation of needed libraries which allows GroupDocs.Conversion for .NET to work properly in a docker container:
ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
RUN apk add --no-cache icu-libs krb5-libs libgcc libintl libssl1.1 libstdc++ zlib
RUN apk add --no-cache ffmpeg libgdiplus
RUN apk add --no-cache msttcorefonts-installer fontconfig
RUN update-ms-fonts && fc-cache fc-cache -f
Also please do not forget to add runtimeconfig.template.json file next to your project file with the following content:
{
"configProperties": {
"System.Drawing.EnableUnixSupport": true
}
}
This will prevent exception “The type initializer for gdip throws exception”. To learn more about this read here.
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