Redis Sentinel Mode

Server IP	Host Role
192.168.10.13	Redis Master
192.168.10.14	Redis Slave1
192.168.10.15	Redis Slave2

Redis Master

Download the Redis installation package

Internet-accessible server
Non-Internet-accessible server

wget https://pdpublic.mingdao.com/private-deployment/offline/common/redis-8.0.4-glibc2.17-amd64.tar.gz

# Redis installation package download link; upload to the deployment server once downloaded
https://pdpublic.mingdao.com/private-deployment/offline/common/redis-8.0.4-glibc2.17-amd64.tar.gz

Extract to the installation directory

tar -zxvf redis-8.0.4-glibc2.17-amd64.tar.gz
mv redis-8.0.4-glibc2.17-amd64 /usr/local/redis

Adjust kernel parameters

echo 'net.core.somaxconn = 32768' >> /etc/sysctl.d/99-sysctl.conf
echo 'vm.overcommit_memory = 1' >> /etc/sysctl.d/99-sysctl.conf
sysctl -p

Create Redis data directory
```
mkdir /data/redis
```

Modify the configuration file

cat > /usr/local/redis/redis.conf <<'EOF'
bind 0.0.0.0
protected-mode yes
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /usr/local/redis/redis.pid
loglevel notice
logfile /usr/local/redis/redis.log
databases 16
save 900 1
save 300 10
save 60 100000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /data/redis
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 0 0 0
hz 10
requirepass 123456
masterauth 123456
maxmemory 16gb
maxmemory-policy allkeys-lru
maxclients 100000
rename-command KEYS ""
EOF

The password for Redis authentication and master-slave authentication is 123456; it must be changed to a strong password in actual deployment.
If the password contains special characters, only - or _ are allowed; characters like @ ! # & are prohibited to avoid compatibility issues.

Create Redis user authorization

useradd -U -M -s /sbin/nologin redis
chown -R redis:redis /usr/local/redis/ /data/redis

Configure systemd management

cat > /etc/systemd/system/redis.service <<'EOF'
[Unit]
Description=Redis
[Service]
User=redis
Group=redis
TasksMax=infinity
LimitNOFILE=102400
LimitNPROC=infinity
LimitCORE=0
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/redis.conf
ExecStop=/usr/bin/kill $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

Start Redis service and enable it on system boot
```
systemctl start redis
systemctl enable redis
```

Redis Slave-01

Download the Redis installation package

Internet-accessible server
Non-Internet-accessible server

wget https://pdpublic.mingdao.com/private-deployment/offline/common/redis-8.0.4-glibc2.17-amd64.tar.gz

# Redis installation package download link; upload to the deployment server once downloaded
https://pdpublic.mingdao.com/private-deployment/offline/common/redis-8.0.4-glibc2.17-amd64.tar.gz

Extract to the installation directory

tar -zxvf redis-8.0.4-glibc2.17-amd64.tar.gz
mv redis-8.0.4-glibc2.17-amd64 /usr/local/redis

Adjust kernel parameters

echo 'net.core.somaxconn = 32768' >> /etc/sysctl.d/99-sysctl.conf
echo 'vm.overcommit_memory = 1' >> /etc/sysctl.d/99-sysctl.conf
sysctl -p

Create Redis data directory
```
mkdir /data/redis
```

Modify the configuration file

cat > /usr/local/redis/redis.conf <<'EOF'
bind 0.0.0.0
protected-mode yes
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /usr/local/redis/redis.pid
loglevel notice
logfile /usr/local/redis/redis.log
databases 16
save 900 1
save 300 10
save 60 100000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /data/redis
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 0 0 0
hz 10
requirepass 123456
masterauth 123456
maxmemory 16gb
maxmemory-policy allkeys-lru
maxclients 100000
rename-command KEYS ""
slaveof 192.168.1.13 6379
EOF

The password for Redis authentication and master-slave authentication is 123456; it must be changed to a strong password in actual deployment.
If the password contains special characters, only - or _ are allowed; characters like @ ! # & are prohibited to avoid compatibility issues.
Replace the master IP in the slaveof parameter during actual deployment.

Create Redis user authorization

useradd -U -M -s /sbin/nologin redis
chown -R redis:redis /usr/local/redis/ /data/redis

Configure systemd management

cat > /etc/systemd/system/redis.service <<'EOF'
[Unit]
Description=Redis
[Service]
User=redis
Group=redis
TasksMax=infinity
LimitNOFILE=102400
LimitNPROC=infinity
LimitCORE=0
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/redis.conf
ExecStop=/usr/bin/kill $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

Start Redis service and enable it on system boot
```
systemctl start redis
systemctl enable redis
```

Redis Slave-02

Download the Redis installation package

Internet-accessible server
Non-Internet-accessible server

wget https://pdpublic.mingdao.com/private-deployment/offline/common/redis-8.0.4-glibc2.17-amd64.tar.gz

# Redis installation package download link; upload to the deployment server once downloaded
https://pdpublic.mingdao.com/private-deployment/offline/common/redis-8.0.4-glibc2.17-amd64.tar.gz

Extract to the installation directory

tar -zxvf redis-8.0.4-glibc2.17-amd64.tar.gz
mv redis-8.0.4-glibc2.17-amd64 /usr/local/redis

Adjust kernel parameters

echo 'net.core.somaxconn = 32768' >> /etc/sysctl.d/99-sysctl.conf
echo 'vm.overcommit_memory = 1' >> /etc/sysctl.d/99-sysctl.conf
sysctl -p

Create Redis data directory
```
mkdir /data/redis
```

Modify the configuration file

cat > /usr/local/redis/redis.conf <<EOF
bind 0.0.0.0
protected-mode yes
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /usr/local/redis/redis.pid
loglevel notice
logfile /usr/local/redis/redis.log
databases 16
save 900 1
save 300 10
save 60 100000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /data/redis
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 0 0 0
hz 10
requirepass 123456
masterauth 123456
maxmemory 16gb
maxmemory-policy allkeys-lru
maxclients 100000
rename-command KEYS ""
slaveof 192.168.1.13 6379
EOF

The password for Redis authentication and master-slave authentication is 123456; it must be changed to a strong password in actual deployment.
If the password contains special characters, only - or _ are allowed; characters like @ ! # & are prohibited to avoid compatibility issues.
Replace the master IP in the slaveof parameter during actual deployment.

Create Redis user authorization

useradd -U -M -s /sbin/nologin redis
chown -R redis:redis /usr/local/redis/ /data/redis

Configure systemd management

cat > /etc/systemd/system/redis.service <<'EOF'
[Unit]
Description=Redis
[Service]
User=redis
Group=redis
TasksMax=infinity
LimitNOFILE=102400
LimitNPROC=infinity
LimitCORE=0
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/redis.conf
ExecStop=/usr/bin/kill $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

Start Redis service and enable it on system boot
```
systemctl start redis
systemctl enable redis
```

Check Master-Slave Synchronization Status of Each Node

/usr/local/redis/bin/redis-cli -a 123456 info replication

Sentinel Configuration

Perform operations on all three Redis servers

Configure the sentinel configuration file

cat > /usr/local/redis/sentinel.conf <<'EOF'
port 26379
daemonize yes
sentinel deny-scripts-reconfig yes
sentinel monitor mymaster 192.168.10.13 6379 2
sentinel auth-pass mymaster 123456
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 30000
pidfile "/usr/local/redis/redis-sentinel.pid"
logfile "/usr/local/redis/redis-sentinel.log"
dir "/data/redis/sentinel"
maxclients 100000
EOF

Note to replace 192.168.10.13 with the actual current Redis Master node IP address.
123456 is a sample password; please change it to a strong password consistent with the Redis node upon deployment.
If the password contains special characters, only - or _ are allowed; characters like @ ! # & are prohibited to avoid compatibility issues.

Create the directory and authorize Redis-related directory permissions

mkdir -p /data/redis/sentinel
chown -R redis:redis /data/redis /usr/local/redis

Configure systemd management

cat > /etc/systemd/system/sentinel.service <<'EOF'
[Unit]
Description=Redis-sentinel
[Service]
User=redis
Group=redis
Type=forking
TasksMax=infinity
LimitNOFILE=102400
LimitNPROC=infinity
LimitCORE=0
ExecStart=/usr/local/redis/bin/redis-sentinel /usr/local/redis/sentinel.conf
ExecStop=/usr/bin/kill $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

Start the sentinel

systemctl start sentinel
systemctl enable sentinel

Check Status

View Sentinel Status

/usr/local/redis/bin/redis-cli -a 123456 -p 26379 info sentinel

Get Current Master Information

/usr/local/redis/bin/redis-cli -a 123456 -p 26379 SENTINEL get-master-addr-by-name mymaster

View Monitored Slave Databases

/usr/local/redis/bin/redis-cli -a 123456 -p 26379 SENTINEL slaves mymaster

Redis Master​

Redis Slave-01​

Redis Slave-02​

Check Master-Slave Synchronization Status of Each Node​

Sentinel Configuration​

Check Status​

Redis Master

Redis Slave-01

Redis Slave-02

Check Master-Slave Synchronization Status of Each Node

Sentinel Configuration

Check Status