analytics-setup/wait-for-elasticsearch

#!/bin/sh

# Copyright (C) 2019 GerritForge Ltd
#
# Licensed 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.

wait_for() {
  for i in `seq 30` ; do
	  curl -f ${ELASTICSEARCH_URL}:${ELASTICSEARCH_PORT}/_cluster/health > /dev/null 2>&1
    result=$?
    if [ $result -eq 0 ] ; then
      if [ $# -gt 0 ] ; then
        exec "$@"
      fi
      exit 0
    fi
    echo "* Waiting for Elasticsearch ${ELASTICSEARCH_URL}:${ELASTICSEARCH_PORT} ($i/30)"
    sleep 2
  done
  echo "Operation timed out" >&2
  exit 1
}

wait_for "$@"