redis sentinel作用 redis的sentinel配置

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mob64ca140761a4 2023-08-08 21:51:44
文章标签 redis sentinel作用数据库网络 lua redis 文章分类 Redis 数据库
在这里我们搭建的是一个1主3从的redis+3个哨兵集群的环境，由于是在一台物理机上，所有我们用端口区分。
物理机IP：192.168.0.12
主节点master端口：6301
从节点slave1端口：6315
从节点slave2端口：6316
从节点slave3端口：6317
哨兵sentinel1端口：26301
哨兵sentinel2端口：26302
哨兵sentinel3端口：26303
一、下载安装 
 
$ wget http://download.redis.io/releases/redis-3.0.0.tar.gz 
 
$ tar xzf redis-3.0.0.tar.gz 
 
$ cd redis-3.0.0 
 
$ make 
 
二、复制文件 
 
cp redis-benchmark redis-cli redis-server redis-sentinel /usr/bin/ #这个倒是很有用，这样就不用再执行时加上./了，而且可以在任何地方执行 
 
三、设置内存分配策略（可选，根据服务器的实际情况进行设置） 
 
/proc/sys/vm/overcommit_memory 
 
可选值：0、1、2。 
 
0， 表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；否则，内存申请失败，并把错误返回给应用进程。 
 
1， 表示内核允许分配所有的物理内存，而不管当前的内存状态如何。 
 
2， 表示内核允许分配超过所有物理内存和交换空间总和的内存 
 
四、开启redis端口，修改防火墙配置文件 
 
    vi /etc/sysconfig/iptables  
 
加入端口配置 
 
    -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6379 -j ACCEPT  
 
重新加载规则 
 
    service iptables restart  
 
五、配置redis.config文件 
 
1、主节点master的配置文件redis_master_6301.config： 
 
# Redis configuration file example 
 
################################## INCLUDES ################################### 
 
# include /path/to/local.conf 
 
# include /path/to/other.conf 
 
################################ GENERAL  ##################################### 
 
daemonize yes 
 
pidfile ./run/redis_slaver1_6315.pid 
 
port 6301 
 
tcp-backlog 511 
 
# bind 192.168.1.100 10.0.0.1 
 
# bind 127.0.0.1 
 
# unixsocket /tmp/redis.sock 
 
# unixsocketperm 700 
 
timeout 0 
 
tcp-keepalive 0 
 
loglevel notice 
 
l 
 ogfile "./run/logs/log_master_6301.log" 
 
databases 16 
 
################################ SNAPSHOTTING  ################################ 
 
save "" 
 
# save 900 1 
 
# save 300 10 
 
# save 60 10000 
 
stop-writes-on-bgsave-error yes 
 
rdbcompression yes 
 
rdbchecksum no 
 
dbfilename dump_6301.rdb 
 
dir ./run/data 
 
################################# REPLICATION ################################# 
 
slave-serve-stale-data yes 
 
slave-read-only yes 
 
repl-diskless-sync no 
 
repl-diskless-sync-delay 5 
 
# repl-ping-slave-period 10 
 
# repl-timeout 60 
 
repl-disable-tcp-nodelay no 
 
# repl-backlog-size 1mb 
 
# repl-backlog-ttl 3600 
 
slave-priority 100 
 
# min-slaves-to-write 3 
 
# min-slaves-max-lag 10 
 
################################## SECURITY ################################### 
 
# rename-command CONFIG "" 
 
################################### LIMITS #################################### 
 
# maxclients 10000 
 
# maxmemory <bytes> 
 
# maxmemory-policy noeviction 
 
# maxmemory-samples 5 
 
############################## APPEND ONLY MODE ############################### 
 
appendonly no 
 
appendfilename "appendonly_6301.aof" 
 
appendfsync no 
 
no-appendfsync-on-rewrite no 
 
auto-aof-rewrite-percentage 100 
 
auto-aof-rewrite-min-size 64mb 
 
aof-load-truncated yes 
 
################################ LUA SCRIPTING  ############################### 
 
lua-time-limit 5000 
 
################################ REDIS CLUSTER  ############################### 
 
# cluster-enabled yes 
 
# cluster-config-file nodes-6379.conf 
 
# cluster-node-timeout 15000 
 
# cluster-slave-validity-factor 10 
 
# cluster-migration-barrier 1 
 
# cluster-require-full-coverage yes 
 
################################## SLOW LOG ################################### 
 
slowlog-log-slower-than 10000 
 
slowlog-max-len 128 
 
################################ LATENCY MONITOR ############################## 
 
latency-monitor-threshold 0 
 
############################# EVENT NOTIFICATION ############################## 
 
notify-keyspace-events "" 
 
############################### ADVANCED CONFIG ############################### 
 
hash-max-ziplist-entries 512 
 
hash-max-ziplist-value 64 
 
list-max-ziplist-entries 512 
 
list-max-ziplist-value 64 
 
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 32mb 8mb 60 
 
hz 10 
 
aof-rewrite-incremental-fsync yes 
 
2、从节点slave1的配置文件redis_slave_6315.config： 
 
# Redis configuration file example 
 
################################## INCLUDES ################################### 
 
# include /path/to/local.conf 
 
# include /path/to/other.conf 
 
################################ GENERAL  ##################################### 
 
daemonize yes 
 
pidfile ./run/redis_slaver1_6315.pid 
 
port 6315 
 
tcp-backlog 511 
 
# bind 192.168.1.100 10.0.0.1 
 
# bind 127.0.0.1 
 
# unixsocket /tmp/redis.sock 
 
# unixsocketperm 700 
 
timeout 0 
 
tcp-keepalive 0 
 
loglevel notice 
 
logfile "./run/logs/log_slaver1_6315.log" 
 
databases 16 
 
################################ SNAPSHOTTING  ################################ 
 
save "" 
 
# save 900 1 
 
# save 300 10 
 
# save 60 10000 
 
stop-writes-on-bgsave-error yes 
 
rdbcompression yes 
 
rdbchecksum no 
 
dbfilename dump_6315.rdb 
 
dir ./run/data 
 
################################# REPLICATION ################################# 
 
slaveof 192.168.0.12 6301 
 
slave-serve-stale-data yes 
 
slave-read-only yes 
 
repl-diskless-sync no 
 
repl-diskless-sync-delay 5 
 
# repl-ping-slave-period 10 
 
# repl-timeout 60 
 
repl-disable-tcp-nodelay no 
 
# repl-backlog-size 1mb 
 
# repl-backlog-ttl 3600 
 
slave-priority 80 
 
# min-slaves-to-write 3 
 
# min-slaves-max-lag 10 
 
################################## SECURITY ################################### 
 
# rename-command CONFIG "" 
 
################################### LIMITS #################################### 
 
# maxclients 10000 
 
# maxmemory <bytes> 
 
# maxmemory-policy noeviction 
 
# maxmemory-samples 5 
 
############################## APPEND ONLY MODE ############################### 
 
appendonly no 
 
appendfilename "appendonly_6315.aof" 
 
appendfsync no 
 
no-appendfsync-on-rewrite no 
 
auto-aof-rewrite-percentage 100 
 
auto-aof-rewrite-min-size 64mb 
 
aof-load-truncated yes 
 
################################ LUA SCRIPTING  ############################### 
 
lua-time-limit 5000 
 
################################ REDIS CLUSTER  ############################### 
 
# cluster-enabled yes 
 
# cluster-config-file nodes-6379.conf 
 
# cluster-node-timeout 15000 
 
# cluster-slave-validity-factor 10 
 
# cluster-migration-barrier 1 
 
# cluster-require-full-coverage yes 
 
################################## SLOW LOG ################################### 
 
slowlog-log-slower-than 10000 
 
slowlog-max-len 128 
 
################################ LATENCY MONITOR ############################## 
 
latency-monitor-threshold 0 
 
############################# EVENT NOTIFICATION ############################## 
 
notify-keyspace-events "" 
 
############################### ADVANCED CONFIG ############################### 
 
hash-max-ziplist-entries 512 
 
hash-max-ziplist-value 64 
 
list-max-ziplist-entries 512 
 
list-max-ziplist-value 64 
 
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 32mb 8mb 60 
 
hz 10 
 
aof-rewrite-incremental-fsync yes 
 
3、从节点slave2的配置文件redis_slave_6316.config： 
 
与上面slave1配置文件需要修改的地方 
 
pidfile ./run/redis_slaver1_6316.pid 
 
port 6316 
 
logfile "./run/logs/log_slaver1_6316.log" 
 
dbfilename dump_6316.rdb 
 
appendfilename "appendonly_6316.aof" 
 
4、从节点slave3的配置文件redis_slave_6317.config： 
 
与上面slave1配置文件需要修改的地方 
 
pidfile ./run/redis_slaver1_6317.pid 
 
port 6317 
 
logfile "./run/logs/log_slaver1_6317.log" 
 
dbfilename dump_6317.rdb 
 
appendfilename "appendonly_6317.aof" 
 
5、哨兵sentinel1的配置文件sentinel_26301.config: 
 
# Example sentinel.conf 
 
port 26301 
 
# sentinel announce-ip 1.2.3.4 
 
dir ./run/tmp 
 
sentinel monitor master1 192.168.0.12 6301 2 
 
# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd 
 
# sentinel down-after-milliseconds <master-name> <milliseconds> 
 
sentinel down-after-milliseconds master1 30000 
 
sentinel parallel-syncs master1 1 
 
sentinel failover-timeout master1 180000 
 
# sentinel notification-script mymaster /var/redis/notify.sh 
 
# sentinel client-reconfig-script mymaster /var/redis/reconfig.sh 
 
# sentinel can-failover master1 yes 
 
logfile "/redis-3.0.0/run/logs/sentinellog_m1_26301.log" 
 
6、哨兵sentinel2的配置文件sentinel_26302.config: 
 
# Example sentinel.conf 
 
port 26302 
 
# sentinel announce-ip 1.2.3.4 
 
dir ./run/tmp 
 
sentinel monitor master1 192.168.0.12 6301 2 
 
# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd 
 
# sentinel down-after-milliseconds <master-name> <milliseconds> 
 
sentinel down-after-milliseconds master1 30000 
 
sentinel parallel-syncs master1 1 
 
sentinel failover-timeout master1 180000 
 
# sentinel notification-script mymaster /var/redis/notify.sh 
 
# sentinel client-reconfig-script mymaster /var/redis/reconfig.sh 
 
# sentinel can-failover master1 yes 
 
logfile "/redis-3.0.0/run/logs/sentinellog_m1_26302.log" 
 
7、哨兵sentinel3的配置文件sentinel_26303.config: 
 
# Example sentinel.conf 
 
port 26303 
 
# sentinel announce-ip 1.2.3.4 
 
dir ./run/tmp 
 
sentinel monitor master1 192.168.0.12 6301 2 
 
# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd 
 
# sentinel down-after-milliseconds <master-name> <milliseconds> 
 
sentinel down-after-milliseconds master1 30000 
 
sentinel parallel-syncs master1 1 
 
sentinel failover-timeout master1 180000 
 
# sentinel notification-script mymaster /var/redis/notify.sh 
 
# sentinel client-reconfig-script mymaster /var/redis/reconfig.sh 
 
# sentinel can-failover master1 yes 
 
logfile "/redis-3.0.0/run/logs/sentinellog_m1_26303.log" 
 
六、启动redis和哨兵服务 
 
注意：第一次要先启动redis主服务、从服务，然后才能启动哨兵服务 
 
1、进入redis安装目录的根目录 
 
2、启动redis主节点 
 
[root@localhost redis-3.0.0]# redis-server  
 redis_master_6301.config 
  & 
 
3、启动redis从节点 
 
[root@localhost redis-3.0.0]# redis-server  
 redis_slave_6315.config 
  & 
 
[root@localhost redis-3.0.0]# redis-server  
 redis_slave_6316.config 
  & 
 
[root@localhost redis-3.0.0]# redis-server  
 redis_slave_6317.config 
  & 
 
4、启动哨兵 
 
[root@localhost redis-3.0.0]# redis-sentinel  
 sentinel_26301.config 
  & 
 
[root@localhost redis-3.0.0]# redis-sentinel  
 sentinel_26302.config 
  & 
 
[root@localhost redis-3.0.0]# redis-sentinel  
 sentinel_26303.config 
  & 
 

到目前为止整个redis+sentinel的安装搭建环境就算完成 
 

七、一些常用命令 
 
进入redis的安装目录 
 
启动redis-server： 
 
./redis-server redis_6305.conf & 
 
启动redis-sentinel  
 
./redis-sentinel sentinel_6301.config 
 
./redis-server sentinel_6316.conf --sentinel & 
 
查看某个端口信息： 
 
./redis-cli -p 6301 info 
 
./redis-cli -p 6301 info Replication 
 
./redis-cli -p 6301 info Sentinel 
 
查看某个主机上的信息redis信息 
 
./redis-cli -h 10.16.41.52 -p 6316 info 
 
./redis-cli -h 10.16.41.52 -p 6316 info Replication 
 
./redis-cli -h 10.16.41.52 -p 6316 info Sentinel 
 
关闭本机redis服务 
 
./redis-cli -p 6379 shutdown 
 
关闭远程主机redis服务 
 
./redis-cli -h 192.168.9.18 -p 6379 shutdown 
 
客户端连接本机 
 
./redis-cli -p 6301 
 
客户端连接远程机 
 
./redis-cli -h 10.16.41.53 -p 6301 
 
切换连接 
 
ssh app@10.16.41.52 
 

使用命令关闭RDB持久化：在客户端执行127.0.0.1:6316> config set save ""
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