diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 4ffabf0a44..ba6e11f6f8 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -107,15 +107,22 @@ jobs:
         java-version: [11]
         es-major-version: [6, 7, 8]
         include:
-        - es-major-version: 6
-          es-version: 6.8.23
+        - es-distribution: elasticsearch
+          es-major-version: 6
+          es-image: elasticsearch:6.8.23
           es-config: elasticsearch.yml
-        - es-major-version: 7
-          es-version: 7.17.3
+        - es-distribution: elasticsearch
+          es-major-version: 7
+          es-image: elasticsearch:7.17.3
           es-config: elasticsearch.yml
-        - es-major-version: 8
-          es-version: 8.1.2
+        - es-distribution: elasticsearch
+          es-major-version: 8
+          es-image: elasticsearch:8.1.2
           es-config: elasticsearch-auth.yml
+        - es-distribution: opensearch
+          es-major-version: 2
+          es-image: opensearchproject/opensearch:2.0.1
+          es-config: elasticsearch.yml
     steps:
     - uses: actions/checkout@v2
 
@@ -125,31 +132,41 @@ jobs:
         docker run -d \
           --name elasticsearch \
           -p 9200:9200 \
-          -v $(pwd)/${{ matrix.es-config }}:/usr/share/elasticsearch/config/elasticsearch.yml \
           -e "discovery.type=single-node" \
           -e "ES_JAVA_OPTS=-Xms128m -Xmx256m" \
           --health-cmd="curl http://localhost:9200/_cluster/health" \
           --health-interval=5s \
           --health-timeout=2s \
           --health-retries=10 \
-          elasticsearch:${{ matrix.es-version }}
+          ${{ matrix.es-image }}
         echo -n "Waiting Elasticsearch "
         until [ $(docker inspect -f '{{.State.Health.Status}}' elasticsearch) == "healthy" ]; do
           sleep 1
           echo -n .
         done
+        echo "ELASTIC_URL=http://localhost:9200" >> $GITHUB_ENV
 
     - name: Setup Elasticsearch password
-      if: ${{ matrix.es-major-version >= 8 }}
+      if: matrix.es-distribution == 'elasticsearch' && matrix.es-major-version >= 8
       run: |
-        set -eux
+        set -eu
         ELASTIC_PASSWORD=$( \
           docker exec elasticsearch \
             /usr/share/elasticsearch/bin/elasticsearch-reset-password --batch -u elastic | \
           awk 'BEGIN { FS=": "; } /^New value:/ { print $2; }' \
         )
+        echo "ELASTIC_URL=https://localhost:9200" >> $GITHUB_ENV
+        echo "ELASTIC_USER=elastic" >> $GITHUB_ENV
         echo "ELASTIC_PASSWORD=$ELASTIC_PASSWORD" >> $GITHUB_ENV
 
+    - name: Opensearch settings
+      if: matrix.es-distribution == 'opensearch'
+      run: |
+        set -eu
+        echo "ELASTIC_URL=https://localhost:9200" >> $GITHUB_ENV
+        echo "ELASTIC_USER=admin" >> $GITHUB_ENV
+        echo "ELASTIC_PASSWORD=admin" >> $GITHUB_ENV
+
     - name: Setup
       uses: ./.github/setup
       with:
@@ -164,18 +181,26 @@ jobs:
     - name: Run integration tests
       run: |
         set -eux
+        # Allow self-signed certificates for JS engine: https://stackoverflow.com/a/66476468/473308
+        export NODE_TLS_REJECT_UNAUTHORIZED=0
+        export ELASTIC_URL='${{ env.ELASTIC_URL }}'
+        export ELASTIC_USER='${{ env.ELASTIC_USER }}'
         export ELASTIC_PASSWORD='${{ env.ELASTIC_PASSWORD }}'
         ./gradlew :integ-tests:check $GRADLE_ARGS
 
     - name: Run samples JVM
       run: |
         set -eux
+        export ELASTIC_URL='${{ env.ELASTIC_URL }}'
+        export ELASTIC_USER='${{ env.ELASTIC_USER }}'
         export ELASTIC_PASSWORD='${{ env.ELASTIC_PASSWORD }}'
         ./gradlew run -p samples $GRADLE_ARGS
 
     - name: Run samples native
       run: |
         set -eux
+        export ELASTIC_URL='${{ env.ELASTIC_URL }}'
+        export ELASTIC_USER='${{ env.ELASTIC_USER }}'
         export ELASTIC_PASSWORD='${{ env.ELASTIC_PASSWORD }}'
         ./gradlew runDebugExecutableNative -p samples $GRADLE_ARGS
 
diff --git a/elasticsearch-auth.yml b/elasticsearch-auth.yml
deleted file mode 100644
index 41e3e4963b..0000000000
--- a/elasticsearch-auth.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-cluster.name: "docker-cluster"
-network.host: 0.0.0.0
-
-# Enable security features
-xpack.security.enabled: true
-
-xpack.security.enrollment.enabled: true
-
-# Disable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents
-xpack.security.http.ssl.enabled: false
-
-# Disable encryption and mutual authentication between cluster nodes
-xpack.security.transport.ssl.enabled: false
diff --git a/elasticsearch.yml b/elasticsearch.yml
deleted file mode 100644
index dfba8ad60d..0000000000
--- a/elasticsearch.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-cluster.name: "docker-cluster"
-network.host: 0.0.0.0
-
-# Disable security features
-xpack.security.enabled: false