Split Amazon Kinesis shard using aws-cli

split-kinesis-shard.sh

# Get list of streams
aws kinesis list-streams --region {region: us-east-1}
# Get list of shards for a stream
aws kinesis describe-stream --region {region: us-east-1} --stream-name {stream_name}

# Split
aws kinesis split-shard --region {region: us-east-1} --stream-name {stream_name} --shard-to-split {shard_id_to_split} --new-starting-hash-key {new_starting_hash_key:(shard ending hashkey / 2)}

# Check that it worked
aws kinesis describe-stream --region {region: us-east-1} --stream-name {stream_name}