◇実行コマンド

$ sh ./main.sh rds_list.txt snapshot-dev-20180718

◇実行結果

$ sh ./main.sh rds_list.txt snapshot-dev-20180718
RDS_LIST: rds_list.txt
SNAPSHOT: snapshot-dev-20180718
======================================================
rds_instance: rds-dev-test-1
 snapshot-dev-20180718stance.sh rds-dev-test-1  ## ここがおかしい！！！

======================================================
rds_instance: rds-dev-test-2
 snapshot-dev-20180718stance.sh rds-dev-test-2  ## ここがおかしい！！！

◇引数に指定したファイル

rds_list.txt

rds_list.txt
1rds-dev-test-1
2rds-dev-test-2

◇シェルスクリプト

main.sh

#!/bin/bash

RDS_LIST=$1
SNAPSHOT=$2

echo "RDS_LIST: ${RDS_LIST}"
echo "SNAPSHOT: ${SNAPSHOT}"

while read rds_instance
do

  echo ======================================================
  echo "rds_instance: ${rds_instance}"

  cmd="sh ./create_cluster_instance.sh ${rds_instance} ${SNAPSHOT}" 
  echo ${cmd}  # ここのコマンドの挙動がおかしい！！
  ${cmd} # >> ${rds_instance}.log &

done < ${RDS_LIST}

create_cluster_instance.sh

#!/bin/bash

profile="aws-dev"

# set Cluster parameter
rds_cluster=`echo $1`-cluster
snapshot=$2
db_subnet_group_name="iotcld-dafdev-1"
vpc_security_group_ids="vpc_security_group_ids"
db_cluster_parameter_group_name="db_cluster_parameter_group"

# set Instance parameter
rds_instance=$1
db_instance_class="db.r3.2xlarge"
availability_zone="ap-northeast-1a"
db_parameter_group_name="db_parameter_group"
master_user_password="master_user_password"

# create the RDS cluster
cmd="aws --profile ${profile} rds restore-db-cluster-from-snapshot --engine aurora --db-cluster-identifier ${rds_cluster} --snapshot-identifier ${snapshot} --db-subnet-group-name ${db_subnet_group_name} --vpc-security-group-ids ${vpc_security_group_ids}"
echo ${cmd}
#${cmd}

#  # wait until the cluster's status changed into available.
#  while true
#  do
#
#    sleep 600
#
    cmd="aws --profile ${profile} rds describe-db-clusters --filters Name=db-cluster-id,Values=${rds_cluster}"
    echo ${cmd}
#    rds_status=`${_cmd} | jq -r '.DBClusters[0].Status'`
#    if [ ${rds_status} == "available" ];then
#        break
#    fi
#
#  done

# modify the cluster's parameter group
cmd="aws --profile ${profile} rds modify-db-cluster --db-cluster-identifier ${rds_cluster} --db-cluster-parameter-group-name ${db_cluster_parameter_group_name}"
echo ${cmd}
#${cmd}

# create an RDS instance
cmd="aws --profile ${profile} rds create-db-instance --engine aurora --db-cluster-identifier ${rds_cluster} --db-instance-identifier ${rds_instance} --db-instance-class ${db_instance_class} --availability-zone ${availability_zone} --db-parameter-group-name ${db_parameter_group_name} --no-multi-az --no-publicly-accessible --master-user-password 
 ${master_user_password}"
echo ${cmd}
#${cmd}