restore_snapshot.sh

#/bin/bash

TIMESTAMP=$(date +%s)
ES_HOST=$1
REPOSITORY=$2
INDEX_NAME=$3
SNAPSHOT_ID=$4
NEW_INDEX_NAME=$5


RESULT=$(curl -XPOST -s http://$ES_HOST/_snapshot/$REPOSITORY\/$SNAPSHOT_ID\/_restore -d "{
    \"indices\": \"$INDEX_NAME\",
    \"ignore_unavailable\": \"true\",
    \"include_global_state\": false,
    \"rename_pattern\": \"$INDEX_NAME\",
    \"rename_replacement\": \"$NEW_INDEX_NAME\"
}")

if [ "$RESULT" == '{"accepted":true}' ]
then
    echo $(date) "Snapshot initiated. Restoring" $INDEX_NAME "into" $NEW_INDEX_NAME "from repository" $REPOSITORY ". Await completion."
    COUNT=0

    while [ $COUNT == 0 ]
    do
	    sleep 30  
        COUNT=$(curl -s http://$ES_HOST/_cat/indices | grep $NEW_INDEX_NAME | grep green | wc -l)

        if [ $COUNT == 1 ]
        then
            echo $(date) "Snapshot restoration of" $NEW_INDEX_NAME "has completed."
        else
        	echo $(date) "Snapshot restoration of" $NEW_INDEX_NAME "still not completed."
        fi
    done
else
    echo $(date) "Initiation of snapshot restoration for" $NEW_INDEX_NAME "FAILED."
fi