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ci: GH workflow for publishing docker images (backport #1593) (#1602)
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ci: GH workflow for publishing docker images (#1593)

* Added GH workflow for publishing docker images

* added pull request trigger

* update actions

* added match pattern for '-lsm' tags

* addressed review comments

(cherry picked from commit 9f375b4)

Co-authored-by: bernd-m <[email protected]>
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mergify[bot] and bermuell authored Feb 1, 2024
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108 changes: 108 additions & 0 deletions .github/workflows/docker-publish.yml
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name: Docker Publish

# Build and publish docker images of ICS on ghcr.io/cosmos/interchain-security
#
# Note: publishing will only be done outside pull-requests
#
# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

on:
push:
branches:
- main
tags:
- "v[0-9]+.[0-9]+.[0-9]+" # Push events matching tag versions as v3.0.0
- "v[0-9]+.[0-9]+.[0-9]+-lsm" # Push events matching '-lsm' postfix tags

env:
# Use docker.io for Docker Hub if empty
REGISTRY: ghcr.io
# github.repository as <account>/<repo>
IMAGE_NAME: ${{ github.repository }}


jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
# This is used to complete the identity challenge
# with sigstore/fulcio when running outside of PRs.
id-token: write

steps:
- name: Checkout repository
uses: actions/checkout@v4

# Install the cosign tool except on PR
# https://github.com/sigstore/cosign-installer
- name: Install cosign
if: github.event_name != 'pull_request'
uses: sigstore/cosign-installer@6e04d228eb30da1757ee4e1dd75a0ec73a653e06 #v3.1.1
with:
cosign-release: 'v2.1.1'

# Set up BuildKit Docker container builder to be able to build
# multi-platform images and export cache
# https://github.com/docker/setup-buildx-action
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0


# Login against a Docker registry except on PR
# https://github.com/docker/login-action
- name: Log into registry ${{ env.REGISTRY }}
if: github.event_name != 'pull_request'
uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
with:
registry: ${{ env.REGISTRY }}
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}

# Extract metadata (tags, labels) for Docker
# https://github.com/docker/metadata-action
- name: Extract Docker metadata
id: meta # reference for later steps
uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
with:
images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
tags: |
type=raw,value=latest,enable=${{github.ref == 'refs/heads/main'}}
type=semver,pattern=v{{version}},value=${{ inputs.tags }},enable=${{ inputs.tags != '' }}
type=match,pattern=v\d+.\d+.\d+(-lsm)?,group=0
flavor: |
latest=false
# Build and push Docker image with Buildx (don't push on PR)
# https://github.com/docker/build-push-action
- name: Build and push Docker image
id: build-and-push
uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 #v5.0.0
with:
context: .
file: ./Dockerfile
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha
cache-to: type=gha,mode=max
platforms: linux/amd64,linux/arm64


# Sign the resulting Docker image digest except on PRs.
# This will only write to the public Rekor transparency log when the Docker
# repository is public to avoid leaking data. If you would like to publish
# transparency data even for private images, pass --force to cosign below.
# https://github.com/sigstore/cosign
- name: Sign the published Docker image
if: ${{ github.event_name != 'pull_request' }}
env:
# https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
TAGS: ${{ steps.meta.outputs.tags }}
DIGEST: ${{ steps.build-and-push.outputs.digest }}
# This step uses the identity token to provision an ephemeral certificate
# against the sigstore community Fulcio instance.
run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

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