In case your Elasticsearch cluster goes red and refuses to assign some shards anymore...

elasticsearchreallocator.sh

# Seems you have 2 solutions left:
# - either you trash the whole index and reindex. Good luck, have fun
# - or you manually reallocate the whole thing
#
# Guess what I'll pick up

curl -XPOST 'localhost:9200/_cluster/reroute' -d '{
    "commands": [
        {
            "allocate": {
                "index": "YOURFUCKINGINDEX",
                "shard": YOURBLOODYSHARD,
                "node": "ANYFUCKINGDATANODE",
                "allow_primary": 1
            }
        }
    ]
}'