feat: add shell to wait for services (#2157)

* feat: add shell to wait for services

* fix: add apache license

Author: starsz

.github/workflows/backend-e2e-test.yml

@@ -74,7 +74,10 @@ jobs:
         working-directory: ./api/test/docker
         run: |
           docker-compose up -d
-          sleep 5
+
+          # wait for services ready
+          ../shell/wait_for_services.sh
+
           docker logs docker_managerapi_1
           docker logs docker_apisix_1
 
@@ -106,7 +109,10 @@ jobs:
         working-directory: ./api/test/docker
         run: |
           docker-compose up -d --build
-          sleep 5
+
+          # wait for services ready
+          ../shell/wait_for_services.sh
+
           docker logs docker_managerapi_1
 
       - name: run test for plugin skywalking

api/test/shell/wait_for_services.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+#
+# 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.
+#
+
+i=1
+timeout=60
+while ! curl -s 127.0.0.1:12800 >/dev/null; do
+  if [[ "$i" -gt "$timeout" ]]; then
+    echo "timeout occurred after waiting $timeout seconds"
+    exit 1
+  fi
+  sleep 1
+  echo "waited skywalking for $i seconds.."
+  ((i++));
+done