name: test

on:
  workflow_dispatch:
  pull_request:
    branches:
      - master

jobs:
  sanity-check:
    runs-on: ubuntu-latest
    steps:

      - name: Get machine's first IPv4 address for eth0
        id: ip
        run: |
          echo ::set-output name=ETHER::$(sudo ip addr show dev eth0 | egrep "^(\ )+inet\ " | head -1 | tr -s " " | cut -d " " -f 3 | cut -d "/" -f 1)

      - name: Show the IPs via vars
        run: |
          echo "Ethernet IPv4 is: ${{ steps.ip.outputs.ETHER }}"

      - name: Checkout
        uses: actions/checkout@v2

      # We use buildx instead of regular build so we can take advantage of Docker layer cache via Github Actions' cache
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1

      # Setup the Github Actions cache.
      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildxarch-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildxarch-

      - name: Build amd64 release image locally to Docker
        uses: docker/build-push-action@v2
        with:
          build-args: |
            DEBUG_BUILD=0
            BASE_IMAGE_SUFFIX=
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./Dockerfile
          platforms: linux/amd64
          tags: sanity-check/docker-registry-proxy:latest
          push: false
          load: true
          cache-from: type=local,src=/tmp/.buildx-cache/release
          # this only reads from the cache

      - name: Start proxy instance in docker
        run: |
          docker run -d --rm --name docker_registry_proxy \
            -p 0.0.0.0:3128:3128 \
            -v $(pwd)/docker_mirror_cache:/docker_mirror_cache \
            -v $(pwd)/docker_mirror_certs:/ca \
            sanity-check/docker-registry-proxy:latest

      - name: Get the initial logs for the container into a file after 10s
        run: |
          echo "Sleeping 10s..."
          sleep 10
          docker logs docker_registry_proxy > initial_logs.txt

      - name: Upload artifact initial_logs
        uses: actions/upload-artifact@v2
        with:
          name: initial_logs
          path: initial_logs.txt

      - name: Wait for container to be up
        timeout-minutes: 1
        run: |
          declare -i IS_UP=0
          while [[ $IS_UP -lt 1 ]]; do
            echo "Waiting for docker-mirror to be available at ${{ steps.ip.outputs.ETHER }} ..."
            curl --silent -I http://${{ steps.ip.outputs.ETHER }}:3128/ && IS_UP=1 || true
            sleep 1
          done
          echo "Container is up..."

      - name: Grab the CA cert from running container via curl
        run: |
          curl http://${{ steps.ip.outputs.ETHER }}:3128/ca.crt | sudo tee /usr/share/ca-certificates/docker_registry_proxy.crt

      - name: Stop proxy instance in docker
        timeout-minutes: 1
        run: |
          timeout 58 docker stop docker_registry_proxy

      - name: Refresh system-wide CA store
        run: |
          echo "docker_registry_proxy.crt" | sudo tee -a /etc/ca-certificates.conf
          sudo update-ca-certificates --fresh

      - name: Configure dockerd via systemd to use the proxy
        run: |
          sudo mkdir -p /etc/systemd/system/docker.service.d
          cat << EOD | sudo tee /etc/systemd/system/docker.service.d/http-proxy.conf
          [Service]
          Environment="HTTP_PROXY=http://${{ steps.ip.outputs.ETHER }}:3128/"
          Environment="HTTPS_PROXY=http://${{ steps.ip.outputs.ETHER }}:3128/"
          EOD

      - name: Reload systemd from disk
        run: |
          sudo systemctl daemon-reload

      - name: Restart dockerd via systemd
        run: |
          sudo systemctl restart docker.service

      - name: Start proxy instance in docker again
        run: |
          docker run -d --rm --name docker_registry_proxy \
            -p 0.0.0.0:3128:3128 \
            -v $(pwd)/docker_mirror_cache:/docker_mirror_cache \
            -v $(pwd)/docker_mirror_certs:/ca \
            sanity-check/docker-registry-proxy:latest

      - name: Wait for container to be up again
        timeout-minutes: 1
        run: |
          declare -i IS_UP=0
          while [[ $IS_UP -lt 1 ]]; do
            echo "Waiting for docker-mirror to be available again at ${{ steps.ip.outputs.ETHER }} ..."
            curl --silent -I http://${{ steps.ip.outputs.ETHER }}:3128/ && IS_UP=1 || true
            sleep 1
          done
          echo "Container is up again..."

      # This can be quite slow, since Github Actions runner Docker comes preloaded with a lot of images.
      - name: Initial prune of all unused images from docker cache (slow)
        timeout-minutes: 2
        run: |
          docker image prune --all --force

      - name: First round of pulls
        timeout-minutes: 2
        run: |
          docker pull alpine:3.6
          docker pull k8s.gcr.io/pause:3.3

      - name: Get the cold cache logs for the container into a file
        run: |
          docker logs docker_registry_proxy > cold_cache.txt

      - name: Upload artifact cold_cache
        uses: actions/upload-artifact@v2
        with:
          name: cold_cache
          path: cold_cache.txt

      - name: prune all unused images from docker cache again
        timeout-minutes: 1
        run: |
          docker image prune --all --force

      - name: sleep 2s to allow cache to stale a bit
        run: |
          sleep 2

      - name: Second round of pulls
        timeout-minutes: 2
        run: |
          docker pull alpine:3.6
          docker pull k8s.gcr.io/pause:3.3

      - name: Get the warm cache docker logs for the container into a file
        run: |
          docker logs docker_registry_proxy > warm_cache.txt

      - name: Upload artifact warm_cache
        uses: actions/upload-artifact@v2
        with:
          name: warm_cache
          path: warm_cache.txt