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0xWheatyz
04597a9ed6
Both image workflows now emit a <timestamp>-<sha> tag on main pushes alongside the existing sha-<short>/latest tags. Flux's ImagePolicy needs a sortable tag to pick the newest build; latest is mutable and sha-<short> has no ordering, so neither could drive auto-deploy. Same scheme as the Talos devbox image. Tag is stamped at build time (UTC); re-running a stale build would sort newest, so prefer reverting over re-running. api and control build via separate workflows/policies and can skew if one fails.
77 lines
2.5 KiB
YAML
77 lines
2.5 KiB
YAML
name: docker
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on:
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push:
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branches: [main]
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tags: ["v*"]
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pull_request:
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branches: [main]
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env:
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IMAGE: ghcr.io/${{ github.repository }}
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jobs:
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build:
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runs-on: ubuntu-latest
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permissions:
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contents: read
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packages: write
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steps:
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- name: Checkout
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uses: actions/checkout@v4
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- name: Set up QEMU
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uses: docker/setup-qemu-action@v3
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v3
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- name: Log in to GHCR
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if: github.event_name != 'pull_request'
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uses: docker/login-action@v3
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with:
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registry: ghcr.io
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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# Tags: branch name on branch pushes, semver on v* tags, short SHA always,
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# `latest` only on the default branch. metadata-action lowercases the repo
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# name (GHCR requires lowercase).
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#
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# The <timestamp>-<sha> tag is what Flux's ImagePolicy sorts on to pick the
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# newest build (see Talos: apps/handler/image-automation/imagepolicy.yaml).
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# It must be monotonic and sortable — `sha-<short>` has no ordering and
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# `latest` is mutable, so neither can drive image automation. UTC keeps it
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# monotonic across DST. Same scheme as apps/devbox.
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#
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# Caveat: this is BUILD time, not commit time. Re-running an old commit's
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# build publishes <now>-<oldsha>, which sorts newest and would deploy older
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# code. Accepted (the sha in the tag makes it obvious after the fact) — but
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# prefer pushing a revert over re-running a stale build.
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- name: Docker metadata
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id: meta
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uses: docker/metadata-action@v5
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with:
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images: ${{ env.IMAGE }}
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tags: |
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type=ref,event=branch
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type=ref,event=pr
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type=semver,pattern={{version}}
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type=semver,pattern={{major}}.{{minor}}
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type=sha
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type=raw,value={{date 'YYYYMMDDHHmmss'}}-{{sha}},enable={{is_default_branch}}
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type=raw,value=latest,enable={{is_default_branch}}
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- name: Build and push
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uses: docker/build-push-action@v6
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with:
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context: .
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platforms: linux/amd64,linux/arm64
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# PRs build (to catch Dockerfile breakage) but never push.
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push: ${{ github.event_name != 'pull_request' }}
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tags: ${{ steps.meta.outputs.tags }}
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labels: ${{ steps.meta.outputs.labels }}
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cache-from: type=gha
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cache-to: type=gha,mode=max
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