指令碼雛形思路：

#!/bin/bash


#叢集初始埠,遞增1
port=$1

#叢集的master個數
cluster_size=$2


function make_cluster_map()
{

[ -f master_slave_map ] && >master_slave_map

#當tag大於叢集cluster_size時用於退出迴圈
tag=0
#控制讀取的機器IP檔案的第幾行
i=1

#獲取機器IP檔案的最後一行內容,如果迴圈未結束,區分在等於master或slave時候，重置i的值
last_row=$(cat iplist | sed -n "$"p)
 
while true
do
    let tag=tag+1
    if [[ $tag -le $cluster_size ]];then
		master_instance=$(cat iplist | sed -n "$i"p)
		#如果master對應的是機器IP檔案的最後1行
		if [[ "$master_instance" == "$last_row" ]];then
			master_instance=$last_row
			#slave對應的就應該是機器IP檔案的第1行
			slave_instance=$(cat iplist | sed -n "1"p)
			echo "$master_instance:$port#$slave_instance:$port" >> master_slave_map
			#如果迴圈沒有退出，那麼下一次的master應該是對應機器IP檔案的第2行，即置i=2
			let i=2	
		else	
			let i=i+1
			slave_instance=$(cat iplist | sed -n "$i"p)
			#如果slave對應的機器IP檔案的最後1行
			if [[ "$slave_instance" == "$last_row" ]];then
				echo "$master_instance:$port#$slave_instance:$port" >> master_slave_map
				#如果迴圈沒有退出，那麼下一次的master應該是對應機器IP檔案的第1行，即置i=1
				let i=1
			else
				echo "$master_instance:$port#$slave_instance:$port" >> master_slave_map
				let i=i+1
			fi
		fi
		#迴圈未結束，下一批次的埠加1
		let port=port+1
	else
		#生成指定規模的叢集例項後退出迴圈
		break
	fi
done
}



function check_exists_port()
{
[ -f check_exists_port ] && >check_exists_port

cat master_slave_map | tr '#' '\n' > all_redis_instance
for line in $(cat all_redis_instance)
do
	{
	check_ip=$(echo $line | awk -F':' '{print $1}')
	check_port=$(echo $line | awk -F':' '{print $2}')
	nums=$(ssh $check_ip "ss -utp state listening sport == :${check_port} |wc -l")
	if [[ $nums -ge 2 ]];then
		echo "$check_ip機器上已存在埠$check_port" >> check_exists_port
	fi
	}&
done

wait

if [[ -s check_exists_port ]];then
	echo "存在埠衝突,退出部署,詳情請檢視check_exists_port檔案內容。"
	exit
fi
}



function create_user_copy_redis_soft()
{
[ -f "copy_hosts" ] && >copy_hosts

for i in `cat iplist`
do
	echo $i | tr '.' '_' | awk '{print "["$1"]"}' >> copy_hosts
	echo $i  >> copy_hosts
	echo >> copy_hosts
done


for ip in `cat iplist`
do
	ansible -i copy_hosts $ip -m user -a "name=redis home=/home/redis shell=/sbin/nologin" --become  --become-method=sudo --become-user=root
	ansible -i copy_hosts $ip -m copy -a "src=/usr/local/redis-5.0.3.tar dest=/usr/local/ owner=redis group=redis mode=0755"
	ansible -i copy_hosts $ip -m shell -a "cd /usr/local/; tar xf redis-5.0.3.tar"
	ansible -i copy_hosts $ip -m shell -a "chown -R redis:redis /usr/local/redis-5.0.3"
done
}


function make_ansible_inventory()
{
cat master_slave_map |tr '#' '\n' | awk '{print "ip_"$1}'| sort -t ':' -nk1 | tr ':' '_' | tr '.' '_' > all_instance

[ -f "ip.list" ] && >ip.list

for i in `cat all_instance`
do
	echo "[$i]" >> ip.list
	myip=$(grep $i all_instance | awk -F'_' '{print $2"."$3"."$4"."$5}')
	myport=$(grep $i all_instance | awk -F['_'] '{print $NF}')
	echo "$myip redis_port=$myport" >> ip.list
	echo >> ip.list
done
}



function make_dirs_copy_cnf_change_cnf()
{
for i in `cat all_instance`
do
	myip=$(grep $i all_instance | awk -F'_' '{print $2"."$3"."$4"."$5}')
	myport=$(grep $i all_instance | awk -F['_'] '{print $NF}')
	ansible -i ip.list ${myip} -m shell -a "mkdir -pv /etc/redis/;mkdir -pv /dbdata/redis/redis5.0.3/$myport/{data,conf,log};chown -R redis:redis /dbdata/redis/redis5.0.3/$myport"
	ansible -i ip.list ${myip} -m copy -a "src=/usr/local/redis.conf dest=/etc/redis owner=redis group=redis mode=0755"
	ansible -i ip.list ${myip} -m shell -a "cd /etc/redis;mv redis.conf redis_$myport.conf;sed -i 's/27008/'$myport'/g' redis_$myport.conf"
done
}



function start_all_redis_instance()
{
for i in `cat all_instance`
do
	myip=$(grep $i all_instance | awk -F'_' '{print $2"."$3"."$4"."$5}')
	myport=$(grep $i all_instance | awk -F['_'] '{print $NF}')
	ansible -i ip.list ${myip} -m shell -a "/usr/local/redis-5.0.3/src/redis-server /etc/redis/redis_$myport.conf"
done
}


function make_redis_cluster_only_master()
{
cat master_slave_map  | awk -F'#' '{print $1}' | tr '\n' ' '  > create_cluster_strings
command="/usr/local/redis-5.0.3/src/redis-cli --cluster create `cat create_cluster_strings`"

/usr/bin/expect <<-EOF
spawn $command
expect "yes"
send "yes\r"
expect eof
EOF

sleep 30
#這裡執行完畢後需要等待一會，否則可能會出現Nodes don't agree about configuration!的提示
}


function add_slave_of_matched_master()
{
for i in `cat master_slave_map`
do
	master_ip=$(echo $i | awk -F['#'] '{print $1}'| awk -F[':'] '{print $1}')
	master_port=$(echo $i | awk -F['#'] '{print $1}'| awk -F[':'] '{print $2}')
	slave_ip=$(echo $i | awk -F['#'] '{print $2}'| awk -F[':'] '{print $1}')
	slave_port=$(echo $i | awk -F['#'] '{print $2}'| awk -F[':'] '{print $2}')
	existing_ip_port=$master_ip:$master_port
	master_id=$(/usr/local/redis-5.0.3/src/redis-cli -h $master_ip -p $master_port cluster nodes | awk '/'$master_ip':'$master_port'/{print $1}')
	/usr/local/redis-5.0.3/src/redis-cli --cluster add-node $slave_ip:$slave_port $existing_ip_port --cluster-slave --cluster-master-id $master_id   
done
}

#if [[ $? -eq 0 ]];then
#	rm -rf all_instance
#	rm -rf copy_hosts
#	rm -rf create_cluster_strings
#	rm -rf hosts
#	rm -rf ip.list	
#fi

function main()
{
# 1、根據主機列表生成待部署的叢集例項對應關係
make_cluster_map

# 2、在目標機器上檢查對應的埠是否被佔用
check_exists_port

# 3、在目標主機上建立redis使用者組和使用者,拷貝redis二進位制包
create_user_copy_redis_soft

# 4、根據master_slave_map檔案生成ansible的inventory檔案
make_ansible_inventory

# 5、呼叫ansible建立redis相關例項的目錄，配置檔案並修改配置檔案
make_dirs_copy_cnf_change_cnf

# 6、呼叫ansible批量啟動所有redis例項
start_all_redis_instance

# 7、建立redis cluster叢集，只新增master角色
make_redis_cluster_only_master

# 8、根據master_slave_map檔案的對應關係，分別master新增對應的slave例項
add_slave_of_matched_master
}

main $@