Allocate unassiged shard in ES

allocate-shard.sh

#!/bin/bash
if [[ $# -ne 1 ]]
then
	echo "Allocate an unassigned shard to a node."
	echo
	echo "$0 destination_node_name"
	exit 1
fi

# The allow_primary parameter will force a new empty primary shard to be allocated without any data.
# If a node which has a copy of the original shard (including data) rejoins the cluster later on,
# that data will be deleted: the old shard copy will be replaced by the new live shard copy.
allow_primary=false

export NODE=$1
export IFS=$'\n'
for line in $(curl -s 'localhost:9200/_cat/shards' | fgrep UNASSIGNED); do
  INDEX=$(echo $line | (awk '{print $1}'))
  SHARD=$(echo $line | (awk '{print $2}'))

  curl -XPOST 'localhost:9200/_cluster/reroute' -d '{
     "commands": [
        {
            "allocate": {
                "index": "'$INDEX'",
                "shard": '$SHARD',
                "node": "'$NODE'",
								"allow_primary": "'$allow_primary'"
          }
        }
    ]
  }'
done