Redis Sentinel physical structure diagram
| Role | IP | Port | alias |
| master | 127.0.01 | 6379 | master node |
| slave-1 | 127.0.01 | 6380 | slave-1 node |
| slave-2 | 127.0.01 | 6381 | slave-2 node |
| sentinel-1 | 127.0.01 | 26379 | sentinel-1 node |
| sentinel-2 | 127.0.01 | 26380 | sentinel-2 node |
| sentinel-3 | 127.0.01 | 26381 | sentinel-3 node |
1. Start the master node
Configuration:
port 6379
daemonize yes
logfile “6379.log”
dbfilename “dump-6379.rdb”
dir “/opt/soft/redis/data/”
Start the master node, and use the following command to verify that the master node has started successfully:
redis-cli -h 127.0.0.1 -p 6379 ping
The topology diagram at this time is as follows:
2. Start two slave nodes
Configuration:
Same as the master node, just add one: slaveof 127.0.0.1 6379
Start two slave nodes and verify that the startup is successful.
3. Confirm the master-slave relationship
Master node perspective, use the info command to view
From the node perspective, use the info command to view
The topology diagram at this time is as follows:
4. Configure the sentinel node
Configuration:
port 26379
daemonize yes
dir /opt/soft/redis/data
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
1). The default port of Sentinel node is 26379.
2). Sentinel monitor mymaster 127.0.0.1 6379 2 configuration means that the sentinel-1 node needs to monitor the master node 127.0.0.1:6379, 2 means that at least 2 sentinel nodes are required to judge the failure of the master node, and mymaster is the alias of the master node.
5. Start the sentinel node
Configure the remaining two sentinel nodes as described above, and then start them separately
redis-sentinel redis-sentinel-26379.conf
6. Confirm
redis-cli -h 127.0.0.1 -p 26379 info sentinel
7. The final topology diagram is as follows:
8. Verification