ElasticSearch - backup production index from host (1) to host (2) with new index

es_backup_index_to_new_host.sh

#!/bin/sh

# Required: npm install elasticdump
# Usage: ./{script} {host-1} {index-to-backup} {host-2} {new-index}

ES_OLD_HOST=$1
ES_OLD_INDEX=$2

ES_NEW_HOST=$3
ES_NEW_INDEX=$4

MAP_FILE="`echo $ES_OLD_INDEX`_mapping.json"
DATA_FILE="`echo $ES_OLD_INDEX`_data.json"

MAP_FILE_CLEAN="`echo $MAP_FILE`_clean"
DATA_FILE_CLEAN="`echo $DATA_FILE`_clean"

ES_NEW_INDEX_PRODUCTION="`echo $ES_NEW_INDEX`_`date +"%Y_%m_%d"`_production_backup"

echo "# backup indices to json files"
./node_modules/.bin/elasticdump --input=$ES_OLD_HOST/$ES_OLD_INDEX --output=$MAP_FILE --type=mapping
./node_modules/.bin/elasticdump --input=$ES_OLD_HOST/$ES_OLD_INDEX --output=$DATA_FILE --type=data

echo "# rename old index to new index for importing mapping/data"
ES_OLD_R1="`echo $ES_OLD_INDEX`_\([0-9\_]\+\)"
cat $MAP_FILE | sed -e "s/\\\"$ES_OLD_R1\\\"/\\\"$ES_NEW_INDEX_PRODUCTION\\\\\"/g" > $MAP_FILE_CLEAN
cat $DATA_FILE | sed -e "s/\"_index\":\"$ES_OLD_R1\"/\"_index\":\"$ES_NEW_INDEX_PRODUCTION\"/g" > $DATA_FILE_CLEAN

echo "# import entities mapping"
./node_modules/.bin/elasticdump --bulk=true --input=$MAP_FILE_CLEAN --output=$ES_NEW_HOST

echo "# import entities data"
./node_modules/.bin/elasticdump --bulk=true --input=$DATA_FILE_CLEAN --output=$ES_NEW_HOST

echo "# create alias: $ES_NEW_INDEX_PRODUCTION -> $ES_NEW_INDEX"
POST_JSON="{\"actions\":[{\"add\":{\"index\":\"$ES_NEW_INDEX_PRODUCTION\",\"alias\":\"$ES_NEW_INDEX\"}}]}"
curl -XPOST "$ES_NEW_HOST/_aliases" -d "$POST_JSON"

echo "# removing json files"
rm *.json*

From any box inside the vpn, how to run script (example):

mkdir /tmp/es_dump && cd $_
npm install elasticdump
time ./es_backup_index_to_new_host.sh {host-1} {index-to-backup} {host-2} {new-index}