docker-dotnet/README.md
Mathias Beaulieu-Duncan 67d4d72414 Fix version table rendering by moving markers outside table
HTML comments between the separator and data rows break markdown
table parsing. Markers now wrap the entire table (header included)
and the pipeline regenerates the full table.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-02-03 15:34:30 -05:00

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# .NET Docker Images
<a href="https://git.openharbor.io/svrnty/docker-dotnet" target="_blank"><img src="https://img.shields.io/badge/Git-Repository-orange?logo=gitea" alt="Git Repository"></a>
<a href="https://hub.docker.com/r/svrnty/dotnet" target="_blank"><img src="https://img.shields.io/badge/Docker%20Hub-svrnty%2Fdotnet-blue?logo=docker" alt="Docker Hub"></a>
<a href="https://hub.docker.com/r/svrnty/dotnet" target="_blank"><img src="https://img.shields.io/docker/pulls/svrnty/dotnet?logo=docker" alt="Docker Pulls"></a>
<!-- BEGIN_DOTNET_BADGE --><a href="https://dotnet.microsoft.com" target="_blank"><img src="https://img.shields.io/badge/.NET-10%20|%209%20|%208-512BD4?logo=dotnet" alt=".NET"></a><!-- END_DOTNET_BADGE -->
<a href="https://wolfi.dev" target="_blank"><img src="https://img.shields.io/badge/Base-Wolfi-purple?logo=linux" alt="Wolfi"></a>
Minimal .NET Docker images for production and CI/CD. Built on [Wolfi](https://wolfi.dev), a security-focused Linux distribution designed for containers. All supported (non-EOL) .NET versions are rebuilt automatically.
## Images
<!-- BEGIN_VERSION_TABLE -->
| Version | <a href="https://hub.docker.com/r/svrnty/dotnet/tags?name=runtime-" target="_blank"><img src="https://img.shields.io/badge/runtime-blue?logo=docker" alt="runtime"></a> | <a href="https://hub.docker.com/r/svrnty/dotnet/tags?name=runtime-invariant-" target="_blank"><img src="https://img.shields.io/badge/runtime--invariant-blue?logo=docker" alt="runtime-invariant"></a> | <a href="https://hub.docker.com/r/svrnty/dotnet/tags?name=sdk-" target="_blank"><img src="https://img.shields.io/badge/sdk-blue?logo=docker" alt="sdk"></a> | Arch | EOL |
|---------|---------|-------------------|-----|------|-----|
| **.NET 10** (LTS) | `runtime-10` `runtime-lts` | `runtime-invariant-10` `runtime-invariant-lts` | `sdk-10` `sdk-lts` | <img src="https://img.shields.io/badge/amd64-E65100" alt="amd64"> <img src="https://img.shields.io/badge/arm64-2e7d32" alt="arm64"> | 2028-11-14 |
| **.NET 9** (STS) | `runtime-9` `runtime-sts` | `runtime-invariant-9` `runtime-invariant-sts` | `sdk-9` `sdk-sts` | <img src="https://img.shields.io/badge/amd64-E65100" alt="amd64"> <img src="https://img.shields.io/badge/arm64-2e7d32" alt="arm64"> | 2026-11-10 |
| **.NET 8** | `runtime-8` | `runtime-invariant-8` | `sdk-8` | <img src="https://img.shields.io/badge/amd64-E65100" alt="amd64"> <img src="https://img.shields.io/badge/arm64-2e7d32" alt="arm64"> | 2026-11-10 |
<!-- END_VERSION_TABLE -->
## Variants
| Variant | Includes | Shell | ICU/Globalization | User |
|---------|----------|-------|-------------------|------|
| <a href="https://hub.docker.com/r/svrnty/dotnet/tags?name=runtime-" target="_blank">**runtime**</a> | ASP.NET Core runtime | No | Yes | 65532 (nonroot) |
| <a href="https://hub.docker.com/r/svrnty/dotnet/tags?name=runtime-invariant-" target="_blank">**runtime-invariant**</a> | ASP.NET Core runtime | No | No (invariant mode) | 65532 (nonroot) |
| <a href="https://hub.docker.com/r/svrnty/dotnet/tags?name=sdk-" target="_blank">**sdk**</a> | .NET SDK + bash, git, curl | Yes (bash) | Yes | root |
- **runtime** - Full globalization support (ICU + tzdata). Use this for apps that need locale-aware formatting, time zones, or culture-specific behavior.
- **runtime-invariant** - No ICU or tzdata. Smallest image size. Use this for APIs that only need UTC and ordinal string comparison.
- **sdk** - Everything needed to build .NET apps. Runs as root so `dotnet restore` can write to global caches.
## Why Wolfi?
[Wolfi](https://wolfi.dev) 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 (recommended)
```dockerfile
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 $ARCH --self-contained false -o /app
FROM svrnty/dotnet:runtime-invariant-10 AS final
WORKDIR /app
COPY --from=build /app .
USER 65532
EXPOSE 8080
ENTRYPOINT ["/usr/share/dotnet/dotnet", "MyApp.Api.dll"]
```
### Web API with globalization (ICU)
```dockerfile
ARG BUILDPLATFORM
FROM --platform=$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 MyApp.sln -a $ARCH --self-contained false -o /app
FROM svrnty/dotnet:runtime-lts AS final
WORKDIR /app
COPY --from=build /app .
USER 65532
EXPOSE 8080
ENTRYPOINT ["/usr/share/dotnet/dotnet", "MyApp.dll"]
```
### Worker service
```dockerfile
ARG BUILDPLATFORM
FROM --platform=$BUILDPLATFORM svrnty/dotnet:sdk-10 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-10 AS final
WORKDIR /app
COPY --from=build /app .
USER 65532
ENTRYPOINT ["/usr/share/dotnet/dotnet", "MyWorker.dll"]
```
## CI/CD (Gitea/GitHub Actions)
```yaml
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
Each variant is tagged with:
- `<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 pointing to the highest active LTS (currently .NET 10)
- `<variant>-sts` - Floating tag pointing to the highest active STS (currently .NET 9)
## 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 with Docker Scout and includes supply chain attestations (SBOM, SLSA provenance).
## License
MIT