[CentOS 7] Redis HA 구성 - Redis Sentinel

server 2개, sentinel 3개로 구성.

 

 

Redis server

# vi redis-master.conf
bind 127.0.0.1
port 6379
masterauth password
requirepass password
daemonize yes

# vi redis-slave.conf
bind 127.0.0.1
port 6380
replicaof 127.0.0.1 6379
masterauth password
requirepass password
daemonize yes

 

Redis sentinel

# vi sentinel-6379.conf
port 16379
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel auth-pass mymaster password
sentinel down-after-milliseconds mymaster 30000
sentinel failover-timeout mymaster 180000
sentinel parallel-syncs mymaster 1

# vi sentinel-6380.conf
port 16380
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel auth-pass mymaster password
sentinel down-after-milliseconds mymaster 30000
sentinel failover-timeout mymaster 180000
sentinel parallel-syncs mymaster 1

# vi sentinel-6381.conf
port 16381
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel auth-pass mymaster password
sentinel down-after-milliseconds mymaster 30000
sentinel failover-timeout mymaster 180000
sentinel parallel-syncs mymaster 1

 

Redis server 시작

redis-server redis-master.conf

redis-server redis-slave.conf

 

Redis sentinel 시작

redis-sentinel sentinel-6379.conf

redis-sentinel sentinel-6380.conf

redis-sentinel sentinel-6381.conf

 

 

---

Failover Test

# master server shutdown

redis-cli -p 6379 -a password

Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.

127.0.0.1:6379> shutdown

not connected>

 

# 감지 후 vote, switch master

14414:X 09 Apr 2021 17:29:53.103 # +sdown master mymaster 127.0.0.1 6379

14414:X 09 Apr 2021 17:29:53.196 # +new-epoch 1

14414:X 09 Apr 2021 17:29:53.196 # +vote-for-leader 7dca29a1696028dfa0ca8f9856e244c27e008c46 1

14414:X 09 Apr 2021 17:29:53.950 # +config-update-from sentinel 7dca29a1696028dfa0ca8f9856e244c27e008c46 127.0.0.1 16379 @ mymaster 127.0.0.1 6379

14414:X 09 Apr 2021 17:29:53.950 # +switch-master mymaster 127.0.0.1 6379 127.0.0.1 6380

 

# screenshots

Sentinel (port 16379) log

Sentinel (port 16380) log

Sentinel (port 16381) log

 

 

### 

server와 sentinel의 port 번호는

    master : 6379, slave : 6380

    sentinel 1 : 16379, sentinel 2 : 16380, sentinel 3 : 16381

각기 다르게 줄 것.

 

 

 

 

 

참고 :
https://coding-start.tistory.com/127
https://coding-start.tistory.com/126