ci: Add job for ES8 integration tests (#5297)

* Add job for ES8 integration tests

* Remove whitespace

* Fix filename

* Add tests.yml

* Revert "Add tests.yml"

This reverts commit ec12654.

.github/workflows/tests.yml

@@ -183,8 +183,8 @@ jobs:
         with:
           parallel-finished: true
 
-  integration-tests-elasticsearch:
-    name: Integration / Elasticsearch / ${{ matrix.os }}
+  integration-tests-elasticsearch7:
+    name: Integration / Elasticsearch7 / ${{ matrix.os }}
     needs:
       - unit-tests
     strategy:
@@ -194,12 +194,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     services:
       elasticsearch:
-        image: elasticsearch:8.7.1
+        image: elasticsearch:7.17.6
         env:
           discovery.type: "single-node"
-          xpack.security.enabled: "false"
           ES_JAVA_OPTS: "-Xms128m -Xmx256m"
-          ELASTIC_CLIENT_APIVERSIONING: 1
         ports:
           - 9200:9200
     steps:
@@ -247,6 +245,69 @@ jobs:
                 - "branch:${{ github.ref_name }}"
                 - "url:https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
 
+  integration-tests-elasticsearch8:
+    name: Integration / Elasticsearch8 / ${{ matrix.os }}
+    needs:
+      - unit-tests
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    services:
+      elasticsearch:
+        image: elasticsearch:8.8.0
+        env:
+          discovery.type: "single-node"
+          xpack.security.enabled: "false"
+          ES_JAVA_OPTS: "-Xms128m -Xmx256m"
+        ports:
+          - 9200:9200
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install Haystack
+        run: pip install .[elasticsearch8,dev,preprocessing,inference]
+
+      - name: Run tests
+        run: |
+          pytest --maxfail=5 -m "document_store and integration" test/document_stores/test_elasticsearch.py
+
+      - name: Calculate alert data
+        id: calculator
+        shell: bash
+        if: (success() || failure()) && github.ref_name == 'main'
+        run: |
+          if [ "${{ job.status }}" = "success" ]; then
+            echo "alert_type=success" >> "$GITHUB_OUTPUT";
+          else
+            echo "alert_type=error" >> "$GITHUB_OUTPUT";
+          fi
+
+      - name: Send event to Datadog
+        if: (success() || failure()) && github.ref_name == 'main'
+        uses: masci/datadog@v1
+        with:
+          api-key: ${{ secrets.CORE_DATADOG_API_KEY }}
+          api-url: https://api.datadoghq.eu
+          events: |
+            - title: "${{ github.workflow }} workflow"
+              text: "Job ${{ github.job }} in branch ${{ github.ref_name }}"
+              alert_type: "${{ steps.calculator.outputs.alert_type }}"
+              source_type_name: "Github"
+              host: ${{ github.repository_owner }}
+              tags:
+                - "project:${{ github.repository }}"
+                - "job:${{ github.job }}"
+                - "run_id:${{ github.run_id }}"
+                - "workflow:${{ github.workflow }}"
+                - "branch:${{ github.ref_name }}"
+                - "url:https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+
   integration-tests-sql:
     name: Integration / SQL / ${{ matrix.os }}
     needs:
@@ -761,7 +822,8 @@ jobs:
     # This way we'll be able to mark only this test as required
     # and skip it accordingly.
     needs:
-      - integration-tests-elasticsearch
+      - integration-tests-elasticsearch7
+      - integration-tests-elasticsearch8
       - integration-tests-sql
       - integration-tests-opensearch
       - integration-tests-dc