Fontconfig error with new alpine image #7012

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1. micgruber

   added

   untriaged

   on Jan 23, 2026
2. github-project-automation

   added this to .NET Dockeron Jan 23, 2026
3. github-project-automation

   moved this to Backlog in .NET Dockeron Jan 23, 2026
4. richlander commented on Jan 23, 2026

   

   richlander

   on Jan 23, 2026

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   Can you share your Dockerfile or the relevent parts of it?
5. micgruber commented on Jan 23, 2026

   

   micgruber

   on Jan 23, 2026

   Last edited by micgruber

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   This is the docker file I renamed a few things and removed the copy commands of the code. When I update the image FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine3.22 to:

   • mcr.microsoft.com/dotnet/aspnet:8.0-alpine
   • mcr.microsoft.com/dotnet/aspnet:8.0-alpine3.23

   I get the error message.

   #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
   
   FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine3.22 AS base
   
   WORKDIR /usr/local/share/ca-certificates
   COPY ["Certificates/cert.crt", "."]
   COPY ["Certificates/cert.crt", "."]
   RUN apk add --upgrade ca-certificates 
   RUN /usr/sbin/update-ca-certificates
   
   WORKDIR /app
   EXPOSE 80
   # install System.Drawing native dependencies
   RUN echo "@testing https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
       apk update && \
       apk upgrade && \
       apk add icu-libs icu-data-full libgdiplus@testing pango cairo icu-dev harfbuzz freetype fontconfig meson && \
       rm -rf /var/cache/apk/* && \
       apk add ttf-dejavu && \
       fc-cache -f
   
   ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
   
   COPY ./Api/Report/Api/fonts ~/.fonts
   COPY ./Api/Report/Api/fonts /usr/shared/fonts
   COPY ./Api/Report/Api/fonts /usr/share/fonts/truetype
   
   FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build
   
   WORKDIR /usr/local/share/ca-certificates
   COPY ["Certificates/cert.crt", "."]
   COPY ["Certificates/cert.crt", "."]
   RUN apk add --upgrade ca-certificates 
   RUN /usr/sbin/update-ca-certificates
   
   WORKDIR /src
   
   
   # Personal access token to access Artifacts feed
   
   ARG ACCESS_TOKEN
   ARG ARTIFACTS_ENDPOINT_L
   ARG ARTIFACTS_ENDPOINT_K
   ARG DEVEXPRESS_LICENSE
   ARG EPPLUS_LICENSE
   
   ENV DevExpress_License=${DEVEXPRESS_LICENSE}
   ENV EPPlusLicense=${EPPLUS_LICENSE}
   
   # Install the Credential Provider to configure the access
   ENV ARTIFACTS_CREDENTIAL_PROVIDER_NON_SC 1
   RUN curl -L 'https://raw.githubusercontent.com/Microsoft/artifacts-credprovider/master/helpers/installcredprovider.sh' | sh
   
   # Configure the environment variables
   
   ENV NUGET_CREDENTIALPROVIDER_SESSIONTOKENCACHE_ENABLED true
   ENV VSS_NUGET_EXTERNAL_FEED_ENDPOINTS "{\"endpointCredentials\": [{\"endpoint\":\"${ARTIFACTS_ENDPOINT_L}\", \"password\":\"${ACCESS_TOKEN}\"},{\"endpoint\":\"${ARTIFACTS_ENDPOINT_K}\", \"password\":\"${ACCESS_TOKEN}\"}]}"
   
   COPY ["nuget.config", "."]
   COPY ["...", "..."]
   RUN dotnet restore "Api/Report/Api/Api.csproj"
   COPY . .
   WORKDIR "/src/Api/Report/Api"
   RUN dotnet build "Api.csproj" -c Release -o /app/build
   
   FROM build AS publish
   RUN dotnet publish "Api.csproj" -c Release -o /app/publish
   
   FROM base AS final
   WORKDIR /app
   COPY --from=publish /app/publish .
   ENTRYPOINT ["dotnet", "Api.dll"]
   
6. lbussell commented on Jan 26, 2026

   

   lbussell

   on Jan 26, 2026

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   [Triage] We didn't change anything in Alpine images when updating from 3.22 to 3.23. Something must have changed in the Alpine base image. Perhaps try looking at the fontconfig changes between 3.22 and 3.23:

   • 3.22 - fontconfig v2.15.0-r3
   • 3.23 - fontconfig v2.17.1-r0
7. lbussell commented on Feb 2, 2026

   

   lbussell

   on Feb 2, 2026

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   [Triage] I'm converting this issue to a discussion since this appears to be related to the base Alpine image and not something we are adding/configuring when installing .NET.
8. dotnet

   locked and limited conversation to collaborators on Feb 2, 2026
9. lbussell

   converted this issue into a discussion #7024 on Feb 2, 2026
10. github-project-automation

    moved this from Backlog to Done in .NET Dockeron Feb 2, 2026