一：免交互式初始化集群
echo "yes"|redis-cli --cluster create 10.0.0.101:6380 10.0.0.102:6380 10.0.0.103:6380 10.0.0.101:6381 10.0.0.102:6381 10.0.0.103:6381 --cluster-replicas 1
二：免交互式扩容
##删除目录下相关文件并重启
rm -rf /data/redis_6390/*
rm -rf /data/redis_6391/*
redis-server /opt/redis_6391/conf/redis_6391.conf
redis-server /opt/redis_6390/conf/redis_6390.conf
1添加主节点
redis-cli --cluster add-node 10.0.0.101:6390 10.0.0.101:6380
2添加从节点
redis-cli --cluster add-node 10.0.0.101:6391 10.0.0.101:6380 --cluster-slave --cluster-master-id $(redis-cli -c -h 10.0.0.101 -p 6380 cluster nodes|awk ‘/101:6390/{print $1}‘)
3重新分配槽
redis-cli --cluster reshard 10.0.0.101:6380 --cluster-from all --cluster-to $(redis-cli -c -h 10.0.0.101 -p 6380 cluster nodes|awk ‘/101:6390/{print $1}‘) --cluster-slots 4096 --cluster-yes
4查看
redis-cli --cluster info 10.0.0.101:6380
三：免交互式缩容
迁移槽
redis-cli --cluster rebalance 10.0.0.101:6380 --cluster-weight $(redis-cli -c -h 10.0.0.101 -p 6390 cluster nodes|awk ‘/101:6390/{print $1}‘)=0
##
--cluster-weight $(redis-cli -c -h 10.0.0.101 -p 6390 cluster nodes|awk ‘/101:6390/{print $1}‘)=0 #将下线节点ID设置为0
下线节点
redis-cli --cluster del-node 10.0.0.101:6391 $(redis-cli -c -h 10.0.0.101 -p 6380 cluster nodes|awk ‘/101:6391/{print $1}‘)
redis-cli --cluster del-node 10.0.0.101:6390 $(redis-cli -c -h 10.0.0.101 -p 6380 cluster nodes|awk ‘/101:6390/{print $1}‘)