build_and_test.yaml

name: "Build and Test"
on:
  - pull_request
  - workflow_dispatch
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Build sidecar
        uses: docker/build-push-action@v6
        with:
          push: false
          outputs: type=docker,dest=/tmp/k8s-sidecar.tar
          tags: "kiwigrid/k8s-sidecar:testing"
      - name: Prepare dummy server static resources
        run: |
          cp test/kubelogo.png test/server/static/
      - name: Build dummy server
        uses: docker/build-push-action@v6
        with:
          context: "test/server"
          push: false
          outputs: type=docker,dest=/tmp/dummy-server.tar
          tags: "dummy-server:1.0.0"
      - name: Upload artifacts
        uses: actions/upload-artifact@v4
        with:
          name: images
          path: /tmp/*.tar
  test:
    needs:
      - build
    strategy:
      matrix:
        # see https://github.com/kubernetes-sigs/kind/releases for supported k8s versions per kind version
        k8s:
          - maj_min: v1.21
            digest: sha256:8a4e9bb3f415d2bb81629ce33ef9c76ba514c14d707f9797a01e3216376ba093
          - maj_min: v1.22
            digest: sha256:f5b2e5698c6c9d6d0adc419c0deae21a425c07d81bbf3b6a6834042f25d4fba2
          - maj_min: v1.23
            digest: sha256:fbb92ac580fce498473762419df27fa8664dbaa1c5a361b5957e123b4035bdcf
          - maj_min: v1.24
            digest: sha256:ea292d57ec5dd0e2f3f5a2d77efa246ac883c051ff80e887109fabefbd3125c7
          - maj_min: v1.25
            digest: sha256:9d0a62b55d4fe1e262953be8d406689b947668626a357b5f9d0cfbddbebbc727
          - maj_min: v1.26
            digest: sha256:5d548739ddef37b9318c70cb977f57bf3e5015e4552be4e27e57280a8cbb8e4f
          - maj_min: v1.27
            digest: sha256:681253009e68069b8e01aad36a1e0fa8cf18bb0ab3e5c4069b2e65cafdd70843
          - maj_min: v1.28
            digest: sha256:b7e1cf6b2b729f604133c667a6be8aab6f4dde5bb042c1891ae248d9154f665b            
          - maj_min: v1.29
            digest: sha256:a0cc28af37cf39b019e2b448c54d1a3f789de32536cb5a5db61a49623e527144
    name: "Test on k8s ${{ matrix.k8s.maj_min }}"
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Create k8s Kind Cluster
        # make sure the k8s versions match the kind version of the action version 🤯
        uses: helm/kind-action@v1.10.0
        with:
          node_image: kindest/node@${{ matrix.k8s.digest }}
          config: test/kind-config.yaml
          cluster_name: sidecar-testing
          wait: 5m
      - name: Download artifact
        uses: actions/download-artifact@v4
        with:
          name: images
          path: /tmp
      - name: Load images into kind cluster
        run: |
          kind load image-archive /tmp/k8s-sidecar.tar --name sidecar-testing
          kind load image-archive /tmp/dummy-server.tar --name sidecar-testing
      - name: Install Sidecar and Dummy Server
        run: |
          wait_for_pod_ready() {
            while [[ $(kubectl get pods $1 -o 'jsonpath={..status.conditions[?(@.type=="Ready")].status}') != "True" ]]; do echo "waiting for pod '$1' to become ready..." && sleep 5; done
            echo "Pod '$1' ready."
          }
          echo "Installing sidecar..."
          kubectl apply -f "test/resources/sidecar.yaml"

          sleep 10

          kubectl get pods

          wait_for_pod_ready "sidecar"
          wait_for_pod_ready "sidecar-basicauth-args"
          wait_for_pod_ready "sidecar-5xx"
          wait_for_pod_ready "sidecar-pythonscript"
          wait_for_pod_ready "sidecar-pythonscript-logfile"
          wait_for_pod_ready "sidecar-logtofile-pythonscript"
          wait_for_pod_ready "dummy-server-pod"

      - name: Install Configmaps and Secrets
        run: |
          wait_for_pod_log() {
            while [[ $(kubectl logs $1 | grep $2) == "" ]]; do echo "waiting 5 more seconds for '$2' to appear in logs of pod '$1'..." && sleep 5; done
            echo "Pod '$1' logs contains '$2'"
          }
          # because the sidecar pods signal ready state before we actually opened up all watching subprocesses, we wait some more time
          sleep 20
          echo "Installing resources..."
          kubectl apply -f "test/resources/resources.yaml"
          pods=("sidecar" "sidecar-basicauth-args" "sidecar-5xx" "sidecar-pythonscript" "sidecar-pythonscript-logfile")
          resources=("sample-configmap" "sample-secret-binary" "absolute-configmap" "relative-configmap" "change-dir-configmap" "similar-configmap-secret" "url-configmap-500" "url-configmap-basic-auth" "sample-configmap")
          for p in ${pods[*]}; do
            for r in ${resources[*]}; do
              wait_for_pod_log $p $r
            done
          done
          # 10 more seconds after the last thing appeared in the logs.
          sleep 10
      - name: Retrieve pod logs
        run: |
          mkdir /tmp/logs
          kubectl logs sidecar > /tmp/logs/sidecar.log
          kubectl logs sidecar-basicauth-args > /tmp/logs/sidecar-basicauth-args.log
          kubectl logs sidecar-5xx > /tmp/logs/sidecar-5xx.log
          kubectl logs sidecar-pythonscript > /tmp/logs/sidecar-pythonscript.log
          kubectl logs sidecar-pythonscript-logfile > /tmp/logs/sidecar-pythonscript-logfile.log
          kubectl logs dummy-server-pod > /tmp/logs/dummy-server.log
      - name: Upload artifacts (pod logs)
        uses: actions/upload-artifact@v4
        with:
          name: pod-logs_${{ matrix.k8s.maj_min }}
          path: /tmp/logs/*
      - name: Download expected files from cluster
        run: |
          mkdir /tmp/sidecar
          mkdir /tmp/sidecar-5xx
          echo "Downloading resource files from sidecar..."
          kubectl cp sidecar:/tmp/hello.world /tmp/sidecar/hello.world
          kubectl cp sidecar:/tmp/cm-kubelogo.png /tmp/sidecar/cm-kubelogo.png
          kubectl cp sidecar:/tmp/secret-kubelogo.png /tmp/sidecar/secret-kubelogo.png
          kubectl cp sidecar:/tmp/url-downloaded-kubelogo.png /tmp/sidecar/url-downloaded-kubelogo.png
          # script also generates into '/tmp'
          kubectl cp sidecar:/tmp/script_result /tmp/sidecar/script_result
          # absolute path in configmap points to /tmp in 'absolute-configmap'
          kubectl cp sidecar:/tmp/absolute/absolute.txt /tmp/sidecar/absolute.txt
          kubectl cp sidecar:/tmp/relative/relative.txt /tmp/sidecar/relative.txt
          kubectl cp sidecar:/tmp/orig-dir/change-dir.txt /tmp/sidecar/change-dir.txt
          kubectl cp sidecar:/tmp/500.txt /tmp/sidecar/500.txt || true
          kubectl cp sidecar:/tmp/secured.txt /tmp/sidecar/secured.txt
          kubectl cp sidecar:/tmp/similar-configmap.txt /tmp/sidecar/similar-configmap.txt
          kubectl cp sidecar:/tmp/similar-secret.txt /tmp/sidecar/similar-secret.txt

          echo "Downloading resource files from sidecar-basicauth-args pod"
          kubectl cp sidecar-basicauth-args:/tmp/secured.txt /tmp/sidecar-basicauth-args/secured.txt

          echo "Downloading resource files from sidecar-5xx..."
          kubectl cp sidecar-5xx:/tmp-5xx/hello.world /tmp/sidecar-5xx/hello.world
          kubectl cp sidecar-5xx:/tmp-5xx/cm-kubelogo.png /tmp/sidecar-5xx/cm-kubelogo.png
          kubectl cp sidecar-5xx:/tmp-5xx/secret-kubelogo.png /tmp/sidecar-5xx/secret-kubelogo.png
          kubectl cp sidecar-5xx:/tmp-5xx/url-downloaded-kubelogo.png /tmp/sidecar-5xx/url-downloaded-kubelogo.png
          # script also generates into '/tmp'
          kubectl cp sidecar-5xx:/tmp/script_result /tmp/sidecar-5xx/script_result
          # absolute path in configmap points to /tmp in 'absolute-configmap'
          kubectl cp sidecar-5xx:/tmp/absolute/absolute.txt /tmp/sidecar-5xx/absolute.txt
          kubectl cp sidecar-5xx:/tmp-5xx/relative/relative.txt /tmp/sidecar-5xx/relative.txt
          kubectl cp sidecar-5xx:/tmp-5xx/orig-dir/change-dir.txt /tmp/sidecar-5xx/change-dir.txt
          kubectl cp sidecar-5xx:/tmp-5xx/500.txt /tmp/sidecar-5xx/500.txt
          kubectl cp sidecar-5xx:/tmp-5xx/secured.txt /tmp/sidecar-5xx/secured.txt
          kubectl cp sidecar-5xx:/tmp-5xx/similar-configmap.txt /tmp/sidecar-5xx/similar-configmap.txt
          kubectl cp sidecar-5xx:/tmp-5xx/similar-secret.txt /tmp/sidecar-5xx/similar-secret.txt
      - name: Upload artifacts (expected files from cluster)
        uses: actions/upload-artifact@v4
        with:
          name: expected-files_${{ matrix.k8s.maj_min }}
          path: |
            /tmp/sidecar/**
            /tmp/sidecar-5xx/**
      - name: Update Configmaps and Secrets
        run: |
          sleep 5
          current_time=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
          wait_for_pod_log() {
            while [[ $(kubectl logs $1 --since-time ${current_time} | grep $2) == "" ]]; do echo "waiting 5 more seconds for '$2' to appear in logs of pod '$1'..." && sleep 5; done
            echo "Pod '$1' logs contains '$2'"
          }
          echo "Updating resources..."
          kubectl apply -f "test/resources/change_resources.yaml"
          pods=("sidecar" "sidecar-5xx")
          resources=("sample-configmap" "sample-secret-binary" "absolute-configmap" "relative-configmap" "change-dir-configmap" "similar-configmap-secret" "url-configmap-500" "url-configmap-basic-auth" "sample-configmap")
          for p in ${pods[*]}; do
            for r in ${resources[*]}; do
              wait_for_pod_log $p $r
            done
          done
          # 20 more seconds after the last thing appeared in the logs.
          sleep 20
      - name: Verify sidecar files after initial sync
        run: |
          echo -n "Hello World!" | diff - /tmp/sidecar/hello.world &&
          diff test/kubelogo.png /tmp/sidecar/cm-kubelogo.png &&
          diff test/kubelogo.png /tmp/sidecar/secret-kubelogo.png &&
          diff test/kubelogo.png /tmp/sidecar/url-downloaded-kubelogo.png &&
          echo -n "This absolutely exists" | diff - /tmp/sidecar/absolute.txt &&
          echo -n "This relatively exists" | diff - /tmp/sidecar/relative.txt &&
          echo -n "This change-dir exists" | diff - /tmp/sidecar/change-dir.txt &&
          echo -n "I'm very similar" | diff - /tmp/sidecar/similar-configmap.txt &&
          echo -n "I'm very similar" | diff - /tmp/sidecar/similar-secret.txt &&
          echo -n "allowed" | diff - /tmp/sidecar/secured.txt &&
          [ ! -f /tmp/sidecar/500.txt ] && echo "No 5xx file created" &&
          ls /tmp/sidecar/script_result
      - name: Verify sidecar-basicauth-args pod file after initial sync
        run: |
          echo -n "allowed" | diff - /tmp/sidecar-basicauth-args/secured.txt          
      - name: Verify sidecar-5xx files after initial sync
        run: |
          echo -n '{"detail":"Not authenticated"}' | diff - /tmp/sidecar-5xx/secured.txt &&
          echo -n "Hello World!" | diff - /tmp/sidecar-5xx/hello.world &&
          diff test/kubelogo.png /tmp/sidecar-5xx/cm-kubelogo.png &&
          diff test/kubelogo.png /tmp/sidecar-5xx/secret-kubelogo.png &&
          diff test/kubelogo.png /tmp/sidecar-5xx/url-downloaded-kubelogo.png &&
          echo -n "This absolutely exists" | diff - /tmp/sidecar-5xx/absolute.txt &&
          echo -n "This relatively exists" | diff - /tmp/sidecar-5xx/relative.txt &&
          echo -n "This change-dir exists" | diff - /tmp/sidecar-5xx/change-dir.txt &&
          echo -n "I'm very similar" | diff - /tmp/sidecar-5xx/similar-configmap.txt &&
          echo -n "I'm very similar" | diff - /tmp/sidecar-5xx/similar-secret.txt &&
          echo -n "500" | diff - /tmp/sidecar-5xx/500.txt &&
          ls /tmp/sidecar-5xx/script_result
      - name: Verify sidecar-python logs after initial sync
        run: |
          # Make sure to update this number this when adding or removing configmap or secrets
          # For log to a file, Need to consider Jobs "Install Configmaps and Secrets" and  "Update Configmaps and Secrets"
          # Total is (9 + 7)
          test $(cat /tmp/logs/sidecar-pythonscript.log | grep "Hello from python script!" | wc -l) = "9" &&
          test $(cat /tmp/logs/sidecar-pythonscript-logfile.log | grep "Hello from python script!" | wc -l) = "9" &&
          kubectl exec sidecar-logtofile-pythonscript -- sh -c "test -e /opt/logs/sidecar.log" &&
          test $(kubectl exec sidecar-logtofile-pythonscript -- sh -c 'cat /opt/logs/sidecar.log | grep "Hello from python script!" | wc -l') = "16"
      - name: Verify sidecar files after update
        run: |
          kubectl exec sidecar -- sh -c "ls /tmp/" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/hello.world" && kubectl exec sidecar -- sh -c "test -e /tmp/change-hello.world" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/cm-kubelogo.png" && kubectl exec sidecar -- sh -c "test -e  /tmp/change-cm-kubelogo.png" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/secret-kubelogo.png" && kubectl exec sidecar -- sh -c "test -e /tmp/change-secret-kubelogo.png" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/absolute/absolute.txt" && kubectl exec sidecar -- sh -c "test -e /tmp/absolute/change-absolute.txt" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/relative/relative.txt" && kubectl exec sidecar -- sh -c "test -e /tmp/relative/change-relative.txt" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/orig-dir/change-dir.txt" && kubectl exec sidecar -- sh -c "test -e /tmp/new-dir/change-dir.txt" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/similar-configmap.txt" && kubectl exec sidecar -- sh -c "test -e /tmp/change-similar-configmap.txt" &&
          kubectl exec sidecar -- sh -c "! test -e /tmp/similar-secret.txt" && kubectl exec sidecar -- sh -c "test -e /tmp/change-similar-secret.txt"