Publish snapshot Docker images (#7337)

.github/workflows/publish-docker.yaml

@@ -0,0 +1,63 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: publish-docker
+
+on:
+  push:
+    branches:
+      - master
+
+env:
+  SKIP_TEST: true
+  HUB: ghcr.io/apache/skywalking
+
+jobs:
+  build:
+    if: github.repository == 'apache/skywalking'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    timeout-minutes: 90
+    strategy:
+      fail-fast: true
+      matrix:
+        es: [es6, es7]
+    env:
+      ES_VERSION: ${{ matrix.es }}
+      TAG: ${{ github.sha }}-${{ matrix.es }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Cache local Maven repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1.10.0
+        with:
+          registry: ${{ env.HUB }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build docker image
+        run: |
+          make docker || make docker
+          make docker.push || make docker.push

CHANGES.md

@@ -11,6 +11,8 @@ Release Notes.
 * Add JDK 16 to test matrix.
 * DataCarrier consumer add a new event notification, call `nothingToConsume` method if the queue has no element to
   consume.
+* Build and push snapshot Docker images to GitHub Container Registry, this is only for people who want to help to test
+  the master branch codes, please don't use in production environments.
 
 #### Java Agent
 * Supports modifying span attributes in async mode.