Erich Blume 0e2c10176d Harden zot registry, pt 1 (#231 )

## Summary
- Enable OIDC + API key authentication on zot with anonymous pull preserved
- Enforce tag immutability for version tags
- Adopt commit-SHA-based container image tagging

Details in the [[harden-zot-registry]] Mikado chain (`mise run docs-mikado harden-zot-registry`).

## Test plan
- [ ] Anonymous pull still works
- [ ] Unauthenticated push fails (401)
- [ ] CI container builds pass with new auth and tagging
- [ ] `mise run services-check` passes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/231

2026-02-20 22:50:01 -08:00

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Dagger

Build engine for BlumeOps CI/CD pipelines. Replaces shell-based build scripts with Python functions that run identically locally and in CI.

Quick Reference

Property	Value
Module	`blumeops-ci`
Engine Version	v0.19.11
SDK	Python
Source	`.dagger/src/blumeops_ci/main.py`
Config	`dagger.json`

Functions

Function	Signature	Description
`build`	`(src, container_name) → Container`	Build a container from `containers/<name>/Dockerfile`
`publish`	`(src, container_name, version, registry?) → str`	Build and push to registry (default: `registry.ops.eblu.me`)
`build_nix`	`(src, container_name) → File`	Build a nix container from `containers/<name>/default.nix`, return docker-archive tarball
`nix_version`	`(package) → str`	Extract the version of a nixpkgs package
`build_docs`	`(src, version) → File`	Build Quartz docs site, return docs tarball
`flake_lock`	`(src, flake_path?) → File`	Resolve flake inputs, return updated `flake.lock`

CLI Examples

# Build a container
dagger call build --src=. --container-name=devpi

# Drop into container shell for inspection
dagger call build --src=. --container-name=devpi terminal

# Debug a failure interactively
dagger call --interactive build --src=. --container-name=devpi

# Publish a container to zot
dagger call publish --src=. --container-name=devpi --version=v1.1.0

# Build a nix container (no local nix required)
dagger call build-nix --src=. --container-name=nettest export --path=./nettest.tar.gz

# Check a nixpkgs package version
dagger call nix-version --package=authentik

# Build docs tarball locally
dagger call build-docs --src=. --version=dev export --path=./docs-dev.tar.gz

# Debug a docs build failure
dagger call --interactive build-docs --src=. --version=dev

Secrets

Dagger has a first-class Secret type — values are never logged or cached. Pass secrets from environment variables using the env:VAR syntax:

dagger call release-docs \
  --src=. --version=v1.6.0 \
  --forgejo-token=env:FORGEJO_TOKEN \
  --argocd-token=env:ARGOCD_TOKEN

In forgejo Actions, secrets are injected as env vars. Locally, mise tasks call op read to populate them.

Caveats

Pre-1.0 API — Current version is v0.19.x. Pin the CLI version and test upgrades on a branch before adopting.
Privileged container — The Dagger engine requires privileged container access. The Forgejo runner's DinD sidecar provides this.

forgejo — CI/CD trigger layer
zot — Container registry (publish target)
docs — Documentation site (build target)
adopt-dagger-ci — Adoption plan (phases 1–3 complete)

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