docker-dotnet/DOCKERHUB.md

.NET Docker Images

Minimal .NET Docker images for production and CI/CD. Built on Wolfi, a security-focused Linux distribution designed for containers. All supported (non-EOL) .NET versions are rebuilt automatically.

Images

Version	runtime	runtime-invariant	sdk	Arch	EOL

| .NET 10 (LTS) | runtime-10 runtime-lts | runtime-invariant-10 runtime-invariant-lts | sdk-10 sdk-lts | amd64 arm64 | 2028-11-14 | | .NET 9 (STS) | runtime-9 runtime-sts | runtime-invariant-9 runtime-invariant-sts | sdk-9 sdk-sts | amd64 arm64 | 2026-11-10 | | .NET 8 | runtime-8 | runtime-invariant-8 | sdk-8 | amd64 arm64 | 2026-11-10 |

Variants

• runtime - ASP.NET Core runtime with ICU/globalization support
• runtime-invariant - ASP.NET Core runtime without ICU (smallest, invariant mode)
• sdk - .NET SDK with bash, git, curl for building apps

Why Wolfi?

Wolfi is a lightweight Linux distribution built specifically for containers. It provides:

• Minimal footprint - Only essential packages, nothing extra
• Daily security updates - Patches applied quickly
• Designed for containers - No legacy cruft from traditional distros

Features

• Lightweight - Optimized for fast CI/CD pulls
• Secure - Built on Wolfi with continuous vulnerability scanning
• Multi-arch - Supports both linux/amd64 and linux/arm64
• Non-root - Runtime images run as unprivileged user (UID 65532)
• Supply chain security - SBOM and SLSA provenance attestations included
• EOL-aware - Versions are automatically dropped when they reach end-of-life

Dockerfile Examples

Web API

ARG BUILDPLATFORM
FROM --platform=$BUILDPLATFORM svrnty/dotnet:sdk-10 AS build

WORKDIR /source
COPY . .
WORKDIR /source/MyApp.Api

ARG TARGETARCH
RUN case "$TARGETARCH" in \
      amd64) ARCH=x64 ;; \
      arm64) ARCH=arm64 ;; \
      *) ARCH=$TARGETARCH ;; \
    esac && \
    dotnet publish -a $ARCH --self-contained false -o /app

FROM svrnty/dotnet:runtime-invariant-10 AS final
WORKDIR /app
COPY --from=build /app .
USER 65532
EXPOSE 8080
ENTRYPOINT ["/usr/share/dotnet/dotnet", "MyApp.Api.dll"]

Worker service

ARG BUILDPLATFORM
FROM --platform=$BUILDPLATFORM svrnty/dotnet:sdk-lts AS build

WORKDIR /source
COPY . .

ARG TARGETARCH
RUN case "$TARGETARCH" in \
      amd64) ARCH=x64 ;; \
      arm64) ARCH=arm64 ;; \
      *) ARCH=$TARGETARCH ;; \
    esac && \
    dotnet publish MyWorker -a $ARCH --self-contained false -o /app

FROM svrnty/dotnet:runtime-invariant-lts AS final
WORKDIR /app
COPY --from=build /app .
USER 65532
ENTRYPOINT ["/usr/share/dotnet/dotnet", "MyWorker.dll"]

CI/CD (Gitea/GitHub Actions)

jobs:
  build:
    runs-on: ubuntu-latest
    container:
      image: svrnty/dotnet:sdk-lts
    steps:
      - uses: actions/checkout@v4
      - run: dotnet restore
      - run: dotnet test --no-restore
      - run: dotnet publish -c Release -o /app

Tags

• <variant>-<major> - Latest patch for a major version (e.g., runtime-10)
• <variant>-<version> - Exact version pin (e.g., runtime-10.0.2, sdk-10.0.102)
• <variant>-lts - Floating tag for the highest active LTS
• <variant>-sts - Floating tag for the highest active STS

Automatic Updates

Images are automatically rebuilt when:

• New .NET patch versions are released (daily check)
• Base image security updates are available (weekly rebuild)
• A .NET version reaches EOL, it is automatically excluded

Every build is scanned and includes supply chain attestations (SBOM, SLSA provenance).

License

MIT