Publish Docker Image workflow (tsukumijima/KonomiTV)
The Publish Docker Image workflow from tsukumijima/KonomiTV, explained and optimized by Latchkey.
CI health: C - fair
Point runs-on at Latchkey and get run de-duplication, job timeouts, SHA-pinned actions, self-healing for flaky steps, and up to 58% lower cost, applied automatically.
What it does
This is the Publish Docker Image workflow from the tsukumijima/KonomiTV repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.
Below, Latchkey shows a faster, safer version produced by its optimization engine.
The workflow
name: Publish Docker Image
# master ブランチに変更があったとき or タグが作成されたとき or 手動実行
on:
push:
branches:
- master
tags:
- '*'
workflow_dispatch:
env:
REGISTRY: ghcr.io
IMAGE_NAME: ${{ github.repository }}
# ジョブの定義
jobs:
build-and-push-image:
runs-on: ubuntu-latest
# 最新コミットがリリースコミットのときは、タグの push がトリガーのとき以外は実行しない
## タグが push された後でないと Releases からサードパーティーライブラリをダウンロードできず失敗する
if: (startsWith(github.ref, 'refs/tags/v')) || (contains(github.event.head_commit.message, 'Release:') == false)
permissions:
contents: read
packages: write
steps:
- name: Checkout Repository
uses: actions/checkout@v4
- name: Setup Docker Buildx
uses: docker/setup-buildx-action@v3
# タグの push がトリガーのときだけ、Release のサードパーティーライブラリが確実にアップロードされるまで1分ほど待つ
- name: Wait for Release to be Created
if: startsWith(github.ref, 'refs/tags/v')
run: |
sleep 60s
# GitHub Container Registry (ghcr.io) にログイン
- name: Login to the Container Registry
uses: docker/login-action@v3
with:
registry: ${{ env.REGISTRY }}
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
# Docker イメージのタグ付け用のメタデータを抽出
- name: Extract Metadata (tags, labels) for Docker
id: meta
uses: docker/metadata-action@v5
with:
images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
tags: |
type=raw,value=latest,enable={{is_default_branch}}
type=ref,event=tag
# Docker イメージをビルドして公開
- name: Build and Push Docker Image
uses: docker/build-push-action@v5
with:
context: .
push: true
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha
cache-to: type=gha,mode=max
provenance: false
# おそらく使われることのない、Untagged なイメージをすべて削除する
# ref: https://github.com/vlaurin/action-ghcr-prune
- name: Prune Untagged Docker Images
uses: vlaurin/action-ghcr-prune@v0.6.0
with:
token: ${{ secrets.DELETE_GHCR_IMAGES_TOKEN }}
container: konomitv
dry-run: false
prune-untagged: true
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: Publish Docker Image # master ブランチに変更があったとき or タグが作成されたとき or 手動実行 on: push: branches: - master tags: - '*' workflow_dispatch: env: REGISTRY: ghcr.io IMAGE_NAME: ${{ github.repository }} # ジョブの定義 concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: build-and-push-image: timeout-minutes: 30 runs-on: latchkey-small # 最新コミットがリリースコミットのときは、タグの push がトリガーのとき以外は実行しない ## タグが push された後でないと Releases からサードパーティーライブラリをダウンロードできず失敗する if: (startsWith(github.ref, 'refs/tags/v')) || (contains(github.event.head_commit.message, 'Release:') == false) permissions: contents: read packages: write steps: - name: Checkout Repository uses: actions/checkout@v4 - name: Setup Docker Buildx uses: docker/setup-buildx-action@v3 # タグの push がトリガーのときだけ、Release のサードパーティーライブラリが確実にアップロードされるまで1分ほど待つ - name: Wait for Release to be Created if: startsWith(github.ref, 'refs/tags/v') run: | sleep 60s # GitHub Container Registry (ghcr.io) にログイン - name: Login to the Container Registry uses: docker/login-action@v3 with: registry: ${{ env.REGISTRY }} username: ${{ github.actor }} password: ${{ secrets.GITHUB_TOKEN }} # Docker イメージのタグ付け用のメタデータを抽出 - name: Extract Metadata (tags, labels) for Docker id: meta uses: docker/metadata-action@v5 with: images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} tags: | type=raw,value=latest,enable={{is_default_branch}} type=ref,event=tag # Docker イメージをビルドして公開 - name: Build and Push Docker Image uses: docker/build-push-action@v5 with: context: . push: true tags: ${{ steps.meta.outputs.tags }} labels: ${{ steps.meta.outputs.labels }} cache-from: type=gha cache-to: type=gha,mode=max provenance: false # おそらく使われることのない、Untagged なイメージをすべて削除する # ref: https://github.com/vlaurin/action-ghcr-prune - name: Prune Untagged Docker Images uses: vlaurin/action-ghcr-prune@v0.6.0 with: token: ${{ secrets.DELETE_GHCR_IMAGES_TOKEN }} container: konomitv dry-run: false prune-untagged: true
What changed
- Run on Latchkey managed runners with one line (
runs-on), which apply the fixes below automatically and self-heal transient failures. This example useslatchkey-small; pick the runner size that fits the job. - Cancel superseded runs when a branch or PR gets a newer push.
- Add a job timeout so a hung step cannot burn hours of runner time.
5 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.
What Latchkey heals here
This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:
- Container pulls and builds
This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.