redis哨兵模式 （本测试用的是redis-6.2.5.tar.gz）
要求：
三台机器 192.168.1.41 （主） 192.168.1.42 （从） 192.168.1.43 （从）
systemctl stop firewalld systemctl disable firewalld
setenforce 0 sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/selinux/config
1.首先配置redis的主从配置
安装依赖(主节点安装) yum -y install gcc gcc-c++
tar -zxvf redis-6.2.5.tar.gz -C /usr/local/ cd /usr/local/redis-6.2.5 make MALLOC=libc make&&make install cd .. scp -r redis-6.2.5/ root@192.168.1.42:/usr/local/ scp -r redis-6.2.5/ root@192.168.1.43:/usr/local/
配置文件redis.conf （主库一台）
#vi /usr/local/redis-6.2.5/redis.conf
#删除里面配置文件，填入下面配置文件在主节点上
protected-mode yes
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
loglevel notice
databases 16
always-show-logo no
set-proc-title yes
proc-title-template "{title} {listen-addr} {server-mode}"
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
rdb-del-sync-files no
dir "/usr/local/redis-6.2.5"
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-diskless-load disabled
repl-disable-tcp-nodelay no
replica-priority 100
acllog-max-len 128
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
lazyfree-lazy-user-del no
lazyfree-lazy-user-flush no
oom-score-adj no
oom-score-adj-values 0 200 800
disable-thp yes
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
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
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
jemalloc-bg-thread yes
bind 0.0.0.0
port 6379
daemonize yes
pidfile /var/run/redis_6379.pid
requirepass 123456
masterauth 123456 #密码自己搞
logfile "/var/log/redis-6379.log"
从库配置文件redis.conf （从库两台）
protected-mode yes
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
loglevel notice
databases 16
always-show-logo no
set-proc-title yes
proc-title-template "{title} {listen-addr} {server-mode}"
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
rdb-del-sync-files no
dir "/usr/local/redis-6.2.5"
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-diskless-load disabled
repl-disable-tcp-nodelay no
replica-priority 100
acllog-max-len 128
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
lazyfree-lazy-user-del no
lazyfree-lazy-user-flush no
oom-score-adj no
oom-score-adj-values 0 200 800
disable-thp yes
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
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
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
jemalloc-bg-thread yes
bind 0.0.0.0
port 6379
daemonize yes
pidfile /var/run/redis_6379.pid
requirepass 123456
masterauth 123456 #密码自己搞
logfile "/var/log/redis-6379.log"
slaveof 192.168.1.41 6379 #写上自己主库的ip
依次启动redis
先启动master 节点 然后依次启动slave节点
可以把redis的命令 cd /usr/local/redis-6.2.5/src cp redis-cli /usr/local/bin/ 这样子就可以全局调用命令了
cd /usr/local/redis-6.2.5/src ./redis-server /usr/local/redis-6.2.5/redis.conf ss -anlp |grep 6379
可以在 tail -100f /var/log/redis-6379.log中 看到3台机子连接成功的信息
测试 主从
（1）主节点创建key（192.168.1.41）
redis-cli -p 6379 auth 123456 set name test exit
（2）从节点查询key（jzcgweb02）
redis-cli -p 8000 auth 123456 get name exit
能获取到name‘test’就代表成功，成功如下图：
测试完后删除测试数据 （主节点上删除就可以）
2. 配置sentinel 哨兵
三台一样就可以
#cd /usr/local/redis-6.2.5 #vi sentinel.conf 删除原有配置 protected-mode no sentinel deny-scripts-reconfig yes sentinel monitor mymaster 192.168.1.42 6379 2 sentinel down-after-milliseconds mymaster 5000 sentinel failover-timeout mymaster 15000 sentinel auth-pass mymaster 123456 port 26379 dir "/usr/local/redis-6.2.5" sentinel config-epoch mymaster 2 sentinel leader-epoch mymaster 2 sentinel known-slave mymaster 192.168.1.42 6379 sentinel known-slave mymaster 192.168.1.43 6379 sentinel current-epoch 2 sentinel announce-ip "192.168.1.41"
全部启动Sentinel
启动顺序 sentinel 1/2/3
#cd /usr/local/redis-6.2.5/src ./redis-sentinel /usr/local/redis-6.2.5/sentinel.conf & ss -anlp|grep 26379
[root@redis1 src]# ./redis-cli -p 26379 INFO Sentinel # Sentinel sentinel_masters:1 sentinel_tilt:0 sentinel_running_scripts:0 sentinel_scripts_queue_length:0 sentinel_simulate_failure_flags:0 master0:name=mymaster,status=ok,address=192.168.1.41:6379,slaves=2,sentinels=3
测试主从切换
192.168.1.41上面 （主上面）
日志输出 其他节点上看日志
tail -100f /var/log/redis-6379.log
