es_reroute_shards.sh

#!/bin/sh

if [ "$1" == "" ] || [ "$2" == ""] ;
then
	echo "\nUse: $0 <es_host> <node_name> [optional] <index_name>\n"
	exit;
fi

for index_shards in $(curl -s -XGET http://$1:9200/_cat/shards | grep UNASSIGNED | awk '{print $1"|"$2;}');
do
	index=$(echo $index_shards | cut -d'|' -f 1)
	shard=$(echo $index_shards | cut -d'|' -f 2)

	echo "\n - Rerouting $1->$index[$shard]"
    curl -XPOST "$1:9200/_cluster/reroute" -d "{
        \"commands\" : [ {
              \"allocate\" : {
                  \"index\" : \"$index\",
                  \"shard\" : \"$shard\",
				  \"node\" : \"$2\",
                  \"allow_primary\" : true
              }
            }
        ]
    }"
    sleep 2
	echo " ... done.\n"
done