haproxy-manager-base/.gitea/workflows/mirror-base-image.yaml

name: Mirror base images
run-name: weekly base-image mirror

# Copies each declared base image (the whole multi-arch INDEX, not one
# platform) from upstream to the in-house registry, so any of our images that FROM these don't depend on docker.io's
# Cloudflare R2 blob storage being reachable. The 2026-05-12 Cloudflare
# incident motivated this for python:3.12-slim and again for golang:1.25
# when the coraza-spoa build hit the same blob-fetch failure.
#
# Adding a new mirror = add one entry to the matrix below. The destination
# tag is always cloud-hosting-platform/<image>:<tag>, matching upstream.

on:
  schedule:
    # Mondays 06:00 UTC — outside customer peak hours and well before the
    # typical Tuesday/Thursday push cycles. workflow_dispatch lets us trigger
    # manually from the Gitea UI when upstream publishes patches.
    - cron: '0 6 * * 1'
  workflow_dispatch:

jobs:
  Mirror-Base:
    runs-on: ubuntu-latest
    strategy:
      # fail-fast=false so one image's upstream being down doesn't block the
      # others from refreshing.
      fail-fast: false
      matrix:
        # hub: the Docker Hub IMAGE:TAG whose digest is resolved DIRECTLY at
        # registry-1.docker.io (resolve-base-image.sh expects no docker.io/
        # prefix; official images resolve as library/<image>).
        image:
          - { hub: 'python:3.12-slim', dst_path: 'cloud-hosting-platform/python', tag: '3.12-slim' }
          - { hub: 'golang:1.25',      dst_path: 'cloud-hosting-platform/golang', tag: '1.25' }

    steps:
      # Only for .gitea/scripts/resolve-base-image.sh.
      - name: Checkout
        uses: actions/checkout@v4

      # Supply chain: ask Docker Hub itself (over HTTPS, never via a mirror) which
      # digest the tag points at right now, then pull exactly that digest. What
      # lands in the in-house registry is therefore content-addressed to the
      # digest Docker Hub reported - not whatever a `docker pull TAG` on the
      # runner happened to resolve through any configured registry mirror.
      # If the lookup fails the job FAILS and last week's mirror stays in place.
      - name: Resolve ${{ matrix.image.hub }} digest (Docker Hub, direct)
        id: base
        env:
          HUB_TAG: ${{ matrix.image.hub }}
        run: |
          set -euo pipefail
          ref=$(.gitea/scripts/resolve-base-image.sh "$HUB_TAG")
          [[ "$ref" =~ ^[a-z0-9][a-z0-9._/-]*@sha256:[0-9a-f]{64}$ ]] || { echo "::error::bad digest reference for ${HUB_TAG}"; exit 1; }
          echo "base-image: ${HUB_TAG} -> ${ref} (digest from registry-1.docker.io)"
          echo "ref=${ref}" >> "$GITHUB_OUTPUT"

      # imagetools needs buildx; same setup as the build workflows.
      - name: Set up Docker Buildx
        uses: https://github.com/docker/setup-buildx-action@v3

      # The registry token is written ONLY by this trusted x86 runner step
      # (unchanged from before; no new secret exposure).
      - name: Login to in-house registry
        uses: docker/login-action@v3
        with:
          registry: repo.anhonesthost.net
          username: ${{ secrets.CI_USER }}
          password: ${{ secrets.CI_TOKEN }}

      # Registry-to-registry copy of the WHOLE upstream index (all platforms,
      # incl. linux/arm64). The old pull/tag/push re-published only the runner's
      # amd64 manifest. mirror-index-copy.sh stages to <tag>-staging, asserts
      # amd64+arm64 present and index digest == the Docker-Hub-reported digest,
      # and only then moves the real tag, so a bad copy never replaces a good
      # multi-arch mirror. Logic + tests: .gitea/scripts/mirror-index-copy.sh,
      # .gitea/scripts/test-mirror-index-copy.sh.
      - name: Copy index by digest, assert platforms + digest ${{ matrix.image.hub }}
        # Values reach the script via env, never via ${{ }} inside run:.
        env:
          REF: ${{ steps.base.outputs.ref }}
          DST_PATH: ${{ matrix.image.dst_path }}
          DST_TAG: ${{ matrix.image.tag }}
        run: |
          set -euo pipefail
          [[ "$REF" =~ ^[a-z0-9][a-z0-9._/-]*@sha256:[0-9a-f]{64}$ ]] || { echo "::error::bad digest reference '${REF}'"; exit 1; }
          [[ "$DST_PATH" =~ ^[a-z0-9][a-z0-9._/-]*$ && "$DST_TAG" =~ ^[A-Za-z0-9_][A-Za-z0-9_.-]{0,127}$ ]] || { echo "::error::bad destination"; exit 1; }
          name="${REF%@*}"; digest="${REF#*@}"
          [[ "$name" == */* ]] || name="library/${name}"   # official images
          .gitea/scripts/mirror-index-copy.sh \
            "docker.io/${name}@${digest}" \
            "repo.anhonesthost.net/${DST_PATH}:${DST_TAG}"