redis cluster concept:
A group of redis services, to provide services to the outside world (originally a person to work, now a group of people to work together).
The characteristics of redis cluster:

1. Each redis service in the redis cluster is a node (node) in the cluster.
2. In redis cluster, redis services are divided into many groups, one of which is the main node.
   The rest are slave nodes, which are used to back up data in the master node.
3. The main node s in redis communicate with each other to inform each other of their own information.
4. When a primary node in the cluster is suspended, one of its slaves will become the primary node.

Configuration master

python@ubuntu:~$ ifconfig
ens33     Link encap:Ethernet hardware address 00:50:56:3a:f9:a8  
          inet address:192.168.78.53  Radio broadcast:192.168.78.255  Mask:255.255.255.0
          inet6 address: fe80::537a:9f77:a5e9:c86f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          //Receiving Packet: 1511270 Error: 0 Drop: 2 Overload: 0 Frames: 0
          //Sending Packet: 2098 Error: 0 Drop: 0 Overload: 0 Carrier: 0
          //Collision: 0 Send queue length: 1000 
          //Receive bytes: 160435514 (160.4 MB) Send bytes: 228472 (228.4 KB)

lo        Link encap:Local loopback  
          inet address:127.0.0.1  Mask:255.0.0.0
          inet6 address: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          //Receiving Packet: 6146 Error: 0 Drop: 0 Overload: 0 Frames: 0
          //Sending Packet: 6146 Error: 0 Drop: 0 Overload: 0 Carrier: 0
          //Collision: 0 Send queue length: 1 
          //Receive bytes: 1175883 (1.1 MB) Send bytes: 1175883 (1.1 MB)

Modify the/etc/redis/redis.conf file

python@ubuntu:~$ sudo vi /etc/redis/redis.conf
bind 127.0.0.1 192.168.78.53

Restart redis service

python@ubuntu:~$ sudo service redis stop
python@ubuntu:~$ redis-server /etc/redis/redis.conf

Configuration from

Copy/etc/redis/redis.conf file

sudo cp  /etc/redis/redis.conf  /etc/redis/slave.conf

Modify redis/slave.conf file

sudo vi slave.conf

Editorial content

bind 192.168.78.53
slaveof 192.168.78.53
port 6378

redis services

sudo redis-server slave.conf

View master-slave relationships

redis-cli info Replication

Logged in

redis-cli -p 6379

Login from

redis-cli -p 6378