Harden CI workflows: reliability tests, least-privilege, build cache

Reliability (catch a bad image revision before prod):
- Smoke-test the exact pushed digest in update-image-on-push.yml BEFORE the
  merge job tags it 'latest' (previously the prod artifact was never run).
- Assert the p2pool banner reports the pinned P2POOL_BRANCH tag, and verify
  the container starts and stays up, instead of just sleeping 30s.

Hardening:
- Least-privilege 'permissions:' blocks (default contents: read; packages:
  write only on push/merge jobs; repo default token is currently write-all).
- Concurrency groups (cancel superseded PR builds; serialize prod pushes).
- persist-credentials: false on checkout; timeout-minutes on jobs.

Build cache:
- cache-to registry buildcache (mode=max, per-arch); read buildcache + latest.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.github/dependabot.yml

@@ -1,11 +0,0 @@
-version: 2
-updates:
-  # Maintain dependencies for GitHub Actions
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "daily"
-    groups:
-      dependency-updates:
-        patterns:
-          - "*"

.github/renovate.json

@@ -0,0 +1,24 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+    "docker:enableMajor",
+    "mergeConfidence:all-badges",
+    ":disableRateLimiting",
+    ":semanticCommits"
+  ],
+  "rebaseWhen": "conflicted",
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": [
+        "/(^|/)Dockerfile$/"
+      ],
+      "matchStrings": [
+        "# renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\sARG .*?_VERSION=(?<currentValue>.*)(\\sARG .*?_CHECKSUM=(?<currentDigest>.*))?\\s",
+        "# renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\sARG .*?_BRANCH=(?<currentValue>.*)(\\sARG .*?_COMMIT_HASH=(?<currentDigest>.*))?\\s"
+      ],
+      "versioningTemplate": "{{#if versioning}}{{versioning}}{{/if}}"
+    }
+  ]
+}

.github/workflows/build-image-on-push.yml

@@ -0,0 +1,86 @@
+name: "Test build of image when Dockerfile is changed"
+
+on:
+  push:
+    paths:
+    - 'Dockerfile'
+    branches-ignore:
+    - main
+  pull_request:
+    paths:
+    - 'Dockerfile'
+  workflow_dispatch:
+
+# Least-privilege default token (this workflow only reads the repo and pulls cache)
+permissions:
+  contents: read
+
+# Cancel superseded runs for the same ref to save CI minutes
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  GHCR_REPO: ghcr.io/${{ github.repository_owner }}/p2pool
+
+jobs:
+  rebuild-container:
+    name: "Build image with cache"
+    timeout-minutes: 60
+    permissions:
+      contents: read
+      packages: read
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - ubuntu-24.04-arm
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Prepare platform matrix for arm64
+        if: runner.arch == 'ARM64'
+        run: |
+          echo "PLATFORM=linux/arm64" >> $GITHUB_ENV
+          echo "DIGEST_NAME=arm64" >> $GITHUB_ENV
+      - name: Prepare platform matrix for amd64
+        if: runner.arch == 'X64'
+        run: |
+          echo "PLATFORM=linux/amd64" >> $GITHUB_ENV
+          echo "DIGEST_NAME=amd64" >> $GITHUB_ENV
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4.1.0
+      - name: Checkout repository
+        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+      - name: Test build of image
+        id: build
+        uses: docker/build-push-action@v7.2.0
+        with:
+          push: false
+          load: true
+          platforms: ${{ env.PLATFORM }}
+          tags: p2pool:testing
+          cache-from: |
+            type=registry,ref=${{ env.GHCR_REPO }}:buildcache-${{ env.DIGEST_NAME }}
+            type=registry,ref=${{ env.GHCR_REPO }}:latest
+      - name: Verify reported version matches the pinned p2pool tag
+        run: |
+          set -euo pipefail
+          EXPECTED="$(awk -F= '/^ARG P2POOL_BRANCH=/{print $2; exit}' Dockerfile)"
+          echo "Expecting p2pool to report: ${EXPECTED}"
+          OUT="$(docker run --rm p2pool:testing --help 2>&1 || true)"
+          echo "${OUT}" | head -1
+          echo "${OUT}" | grep -q "${EXPECTED}" \
+            || { echo "::error::p2pool banner does not contain expected tag ${EXPECTED}"; exit 1; }
+      - name: Verify the container starts and stays up
+        run: |
+          set -uo pipefail
+          CID="$(docker run -d p2pool:testing --wallet 468ydghFfthE3UTc53eF5MP9UyrMcUiAHP5kizVYJsej5XGaXBoAAEzUHCcUF7t3E3RrYAX8Rs1ujhBdcvMpZSbH8qkb55R)"
+          sleep 20
+          if [ "$(docker inspect -f '{{.State.Running}}' "$CID" 2>/dev/null || echo false)" != "true" ]; then
+            echo "::error::container exited early"; docker logs "$CID" 2>&1 || true
+            docker rm -f "$CID" >/dev/null 2>&1 || true; exit 1
+          fi
+          docker rm -f "$CID" >/dev/null 2>&1 || true

.github/workflows/trivy-analysis.yml

@@ -1,37 +0,0 @@
-name: Build and scan container for vulnerabilities with Trivy
-
-on:
-  push:
-    paths:
-    - 'Dockerfile'
-  pull_request:
-    paths:
-    - 'Dockerfile'
-  schedule:
-    - cron: '22 14 * * 0'
-
-jobs:
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Build an image from Dockerfile
-        run: |
-          docker build -t docker.io/my-organization/my-app:${{ github.sha }} .
-
-      - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@master
-        with:
-          image-ref: 'docker.io/my-organization/my-app:${{ github.sha }}'
-          format: 'template'
-          template: '@/contrib/sarif.tpl'
-          output: 'trivy-results.sarif'
-          severity: 'CRITICAL,HIGH'
-
-      - name: Upload Trivy scan results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@v3
-        with:
-          sarif_file: 'trivy-results.sarif'

.github/workflows/update-image-on-push.yml

@@ -6,58 +6,166 @@ on:
     - main
     paths:
     - 'Dockerfile'
+  workflow_dispatch:
+
+# Least-privilege default; jobs that push opt into packages: write below
+permissions:
+  contents: read
+
+# Never run two prod pushes for the same ref concurrently (avoid racing the
+# manifest/`latest` tag); do not cancel an in-flight push.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
+env:
+  GHCR_REPO: ghcr.io/${{ github.repository_owner }}/p2pool
+
 jobs:
-  rebuild-container:
+  build:
-    name: "Rebuild Container with the latest base image"
+    name: "Build container for multiple architectures and push by digest"
-    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - ubuntu-24.04-arm
+    runs-on: ${{ matrix.os }}
     steps:
-      - 
+      - name: Prepare platform matrix for arm64
-        name: Prepare outputs
+        if: runner.arch == 'ARM64'
-        id: prep
         run: |
-          echo "::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
+          echo "PLATFORM=linux/arm64" >> $GITHUB_ENV
-      - 
+          echo "DIGEST_NAME=arm64" >> $GITHUB_ENV
-        name: Set up QEMU
+      - name: Prepare platform matrix for amd64
-        uses: docker/setup-qemu-action@v3.2.0
+        if: runner.arch == 'X64'
+        run: |
+          echo "PLATFORM=linux/amd64" >> $GITHUB_ENV
+          echo "DIGEST_NAME=amd64" >> $GITHUB_ENV
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v6
         with:
-          platforms: linux/arm64
+          images: |
-      - 
+            ${{ env.GHCR_REPO }}
-        name: Set up Docker Buildx
+      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.7.1
+        uses: docker/setup-buildx-action@v4.1.0
-      -
+      - name: Login to GitHub Container Registry
-        name: Login to GitHub Container Registry
+        uses: docker/login-action@v4.2.0
-        uses: docker/login-action@v3.3.0 
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      -
+      - name: Checkout repository
-        name: Login to DockerHub
+        uses: actions/checkout@v7
-        uses: docker/login-action@v3.3.0 
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
+          persist-credentials: false
-          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Build and push by digest
-      - name: "Checkout repository"
+        uses: docker/build-push-action@v7.2.0
-        uses: "actions/checkout@v4"
+        id: build
-      - 
-        name: "Get p2pool Release Tag"
-        id: get_tag
-        run: echo "::set-output name=tag::$(awk -F "=" '/P2POOL_BRANCH=/ {print $2}' Dockerfile)"
-      - 
-        name: Build and push to Docker Hub and GitHub Packages Docker Registry
-        uses: docker/build-push-action@v6.10.0
-        id: docker_build_push
         with:
-          push: true
+          outputs: type=image,"name=${{ env.GHCR_REPO }}",push-by-digest=true,name-canonical=true,push=true
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ env.PLATFORM }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: |
+            type=registry,ref=${{ env.GHCR_REPO }}:buildcache-${{ env.DIGEST_NAME }}
+            type=registry,ref=${{ env.GHCR_REPO }}:latest
+          cache-to: type=registry,ref=${{ env.GHCR_REPO }}:buildcache-${{ env.DIGEST_NAME }},mode=max
+
+      # Smoke-test the exact artifact that was just pushed, BEFORE the merge job
+      # tags it `latest`. If this fails, the merge job (needs: build) never runs.
+      - name: Verify pushed image reports the pinned p2pool tag
+        run: |
+          set -euo pipefail
+          EXPECTED="$(awk -F= '/^ARG P2POOL_BRANCH=/{print $2; exit}' Dockerfile)"
+          REF="${GHCR_REPO}@${{ steps.build.outputs.digest }}"
+          echo "Expecting ${EXPECTED} from ${REF}"
+          OUT="$(docker run --rm "${REF}" --help 2>&1 || true)"
+          echo "${OUT}" | head -1
+          echo "${OUT}" | grep -q "${EXPECTED}" \
+            || { echo "::error::pushed image banner does not contain expected tag ${EXPECTED}"; exit 1; }
+      - name: Verify pushed image starts and stays up
+        run: |
+          set -uo pipefail
+          REF="${GHCR_REPO}@${{ steps.build.outputs.digest }}"
+          CID="$(docker run -d "${REF}" --wallet 468ydghFfthE3UTc53eF5MP9UyrMcUiAHP5kizVYJsej5XGaXBoAAEzUHCcUF7t3E3RrYAX8Rs1ujhBdcvMpZSbH8qkb55R)"
+          sleep 20
+          if [ "$(docker inspect -f '{{.State.Running}}' "$CID" 2>/dev/null || echo false)" != "true" ]; then
+            echo "::error::pushed image exited early"; docker logs "$CID" 2>&1 || true
+            docker rm -f "$CID" >/dev/null 2>&1 || true; exit 1
+          fi
+          docker rm -f "$CID" >/dev/null 2>&1 || true
+
+      - name: Export digest
+        run: |
+          mkdir -p ${{ runner.temp }}/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "${{ runner.temp }}/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v7
+        with:
+          name: digests-${{ env.DIGEST_NAME }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    name: "Merge digests and push with proper tags"
+    timeout-minutes: 15
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v8
+        with:
+          path: ${{ runner.temp }}/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to GHCR
+        uses: docker/login-action@v4.2.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4.1.0
+
+      - name: Checkout repository
+        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+
+      - name: Get p2pool release tag
+        run: echo P2POOL_TAG="$(awk -F '=' '/P2POOL_BRANCH=/ {print $2}' Dockerfile)" >> $GITHUB_ENV
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v6
+        with:
+          images: |
+            ${{ env.GHCR_REPO }}
           tags: |
-            ghcr.io/${{ github.repository_owner }}/p2pool:latest
+            type=sha
-            ghcr.io/${{ github.repository_owner }}/p2pool:${{ steps.get_tag.outputs.tag }}
+            type=raw,value=latest,enable={{is_default_branch}}
-            ${{ secrets.DOCKER_USERNAME }}/p2pool:latest
+            type=raw,value=${{ env.P2POOL_TAG }}
-            ${{ secrets.DOCKER_USERNAME }}/p2pool:${{ steps.get_tag.outputs.tag }}
+
-          labels: |
+      - name: Create manifest list and push
-            org.opencontainers.image.source=${{ github.event.repository.html_url }}
+        working-directory: ${{ runner.temp }}/digests
-            org.opencontainers.image.created=${{ steps.prep.outputs.created }}
+        run: |
-            org.opencontainers.image.revision=${{ github.sha }}
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
-          cache-from: type=registry,ref=${{ secrets.DOCKER_USERNAME }}/simple-monerod:latest
+            $(printf '${{ env.GHCR_REPO }}@sha256:%s ' *)
-          cache-to: type=inline
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.GHCR_REPO }}:${{ steps.meta.outputs.version }}

Dockerfile

@@ -1,7 +1,8 @@
-ARG P2POOL_BRANCH=v4.2
+# renovate: datasource=github-releases depName=SChernykh/p2pool
+ARG P2POOL_BRANCH=v4.17
 
-# Select latest Ubuntu LTS for the build image base
+# Pin to the latest Ubuntu LTS for the build image base (kept current by Renovate)
-FROM ubuntu:latest as build
+FROM ubuntu:26.04 AS build
 LABEL author="sethforprivacy@protonmail.com" \
       maintainer="sethforprivacy@protonmail.com"
 
@@ -16,28 +17,30 @@ RUN apt-get update \
 
 ENV CFLAGS='-fPIC'
 ENV CXXFLAGS='-fPIC'
-ENV USE_SINGLE_BUILDDIR 1
+ENV USE_SINGLE_BUILDDIR=1
-ENV BOOST_DEBUG         1
+ENV BOOST_DEBUG=1
 
 # Switch to p2pool source directory
 WORKDIR /p2pool
 
 # Git pull p2pool source at specified tag/branch
 ARG P2POOL_BRANCH
-RUN git clone --recursive --branch ${P2POOL_BRANCH} https://github.com/SChernykh/p2pool .
+RUN git clone --recursive --depth 1 --shallow-submodules --branch ${P2POOL_BRANCH} https://github.com/SChernykh/p2pool .
 
 # Make static p2pool binary
 ARG NPROC
 RUN test -z "$NPROC" && nproc > /nproc || echo -n "$NPROC" > /nproc && mkdir build && cd build && cmake .. && make -j"$(cat /nproc)"
 
-# Select latest Ubuntu LTS for the image base
+# Pin to the latest Ubuntu LTS for the image base (kept current by Renovate)
-FROM ubuntu:latest
+FROM ubuntu:26.04
 
-# Install remaining dependencies
+# Install only the runtime shared libraries that the p2pool binary links against
+# (runtime equivalents of the build-stage -dev packages, verified via ldd on the
+# built binary against the pinned Ubuntu 24.04 base)
 RUN apt-get update \
     && apt-get upgrade -y \
-    && apt-get install --no-install-recommends -y libuv1-dev libzmq3-dev libsodium-dev \
+    && apt-get install --no-install-recommends -y libuv1t64 libzmq5 libsodium23 \
-    libpgm-dev libnorm-dev libgss-dev libcurl4-openssl-dev libidn2-0-dev \
+    libpgm-5.3-0t64 libnorm1t64 libgssapi-krb5-2 libcurl4t64 libidn2-0 \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 Seth Simmons (@sethsimmons)
+Copyright (c) 2021 Seth For Privacy (@sethforprivacy)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -3,21 +3,11 @@ A simple and straightforward Dockerized [p2pool](https://github.com/SChernykh/p2
 
 ## Actions
 
-[![Daily Update Rebuild](https://github.com/sethsimmons/p2pool-docker//actions/workflows/update-daily.yml/badge.svg)](https://github.com/sethsimmons/p2pool-docker/actions/workflows/update-daily.yml)  
+[![Daily Update Rebuild](https://github.com/sethforprivacy/p2pool-docker//actions/workflows/update-daily.yml/badge.svg)](https://github.com/sethforprivacy/p2pool-docker/actions/workflows/update-daily.yml)  
-[![Weekly Update Rebuild](https://github.com/sethsimmons/p2pool-docker//actions/workflows/update-base-image.yml/badge.svg)](https://github.com/sethsimmons/p2pool-docker/actions/workflows/update-base-image.yml)  
+[![Weekly Update Rebuild](https://github.com/sethforprivacy/p2pool-docker//actions/workflows/update-base-image.yml/badge.svg)](https://github.com/sethforprivacy/p2pool-docker/actions/workflows/update-base-image.yml)  
-[![Latest Dockerfile build](https://github.com/sethsimmons/p2pool-docker//actions/workflows/update-image-on-push.yml/badge.svg)](https://github.com/sethsimmons/p2pool-docker/actions/workflows/update-image-on-push.yml)  
-[![Container security scan with Trivy](https://github.com/sethsimmons/p2pool-docker//actions/workflows/trivy-analysis.yml/badge.svg)](https://github.com/sethsimmons/p2pool-docker/actions/workflows/trivy-analysis.yml)
-
-## Docker
-
-![Docker Pulls](https://img.shields.io/docker/pulls/sethsimmons/p2pool)  
-![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/sethsimmons/p2pool)  
-![Docker Image Version (latest by date)](https://img.shields.io/docker/v/sethsimmons/p2pool)  
 
 # Docker Hub
-This repo is used to build the images available at:
+This repo is used to build the images available here on GHCR.
-
-https://hub.docker.com/r/sethsimmons/p2pool
 
 # Tags
 
@@ -28,7 +18,7 @@ https://hub.docker.com/r/sethsimmons/p2pool
 *NOTE: Remember to replace the host address with your own node (if desired) as well as the Monero address for the `--wallet` flag, or else you'll be making a kind hashrate donation to me.*
 
 ```bash
-docker run -d --name="p2pool" -p 3333:3333 -p 37889:37889 -v p2pool-data:/home/p2pool -v /dev/hugepages:/dev/hugepages:rw sethsimmons/p2pool:latest --host 5.9.120.18 --rpc-port 18089 --wallet 468ydghFfthE3UTc53eF5MP9UyrMcUiAHP5kizVYJsej5XGaXBoAAEzUHCcUF7t3E3RrYAX8Rs1ujhBdcvMpZSbH8qkb55R --stratum 0.0.0.0:3333 --p2p 0.0.0.0:37889 --addpeers 65.21.227.114:37889,node.sethforprivacy.com:37889
+docker run -d --name="p2pool" -p 3333:3333 -p 37889:37889 -v p2pool-data:/home/p2pool -v /dev/hugepages:/dev/hugepages:rw ghcr.io/sethforprivacy/p2pool:latest --host 5.9.120.18 --rpc-port 18089 --wallet 468ydghFfthE3UTc53eF5MP9UyrMcUiAHP5kizVYJsej5XGaXBoAAEzUHCcUF7t3E3RrYAX8Rs1ujhBdcvMpZSbH8qkb55R --stratum 0.0.0.0:3333 --p2p 0.0.0.0:37889 --addpeers 65.21.227.114:37889,node.sethforprivacy.com:37889
 ```
 
 # Copyrights

examples/docker-compose.yml

@@ -1,7 +1,6 @@
-version: '3.5'
 services:
   monerod:
-    image: sethsimmons/simple-monerod:latest
+    image: ghcr.io/sethforprivacy/simple-monerod:latest
     restart: unless-stopped
     container_name: monerod
     volumes:
@@ -21,7 +20,7 @@ services:
       - "--out-peers=50"
   
   p2pool:
-    image: sethsimmons/p2pool:latest
+    image: ghcr.io/sethforprivacy/p2pool:latest
     restart: unless-stopped
     container_name: p2pool
     tty: true
@@ -52,15 +51,6 @@ services:
     volumes:
         - tor-keys:/var/lib/tor/hidden_service/
 
-  autoheal:
-    image: willfarrell/autoheal:latest
-    container_name: autoheal
-    restart: unless-stopped
-    environment:
-        AUTOHEAL_CONTAINER_LABEL: all
-    volumes:
-        - "/var/run/docker.sock:/var/run/docker.sock"
-
   watchtower:
     image: containrrr/watchtower:latest
     container_name: watchtower