redis配置哨兵模式

环境:
redis版本:4.0.14
os:Centos7

主:  192.168.1.85:8001
从:  192.168.1.85:8002
哨兵:192.168.1.85:8999

1.主节点安装部署
[root@localhost src]# cd /soft/redis-4.0.14/src
[root@localhost src]# make PREFIX=/opt/redis-shaobing/master install
[root@localhost src]# cp redis-trib.rb /opt/redis-shaobing/master/

[root@localhost src]# mkdir -p /opt/redis-shaobing/master/conf
[root@localhost src]# mkdir -p /opt/redis-shaobing/master/logs
[root@localhost src]# mkdir -p /opt/redis-shaobing/master/run
[root@localhost src]# mkdir -p /opt/redis-shaobing/master/data


2.从节点安装部署
[root@localhost src]# cd /soft/redis-4.0.14/src
[root@localhost src]# make PREFIX=/opt/redis-shaobing/slave install
[root@localhost src]# cp redis-trib.rb /opt/redis-shaobing/slave/

[root@localhost src]# mkdir -p /opt/redis-shaobing/slave/conf
[root@localhost src]# mkdir -p /opt/redis-shaobing/slave/logs
[root@localhost src]# mkdir -p /opt/redis-shaobing/slave/run
[root@localhost src]# mkdir -p /opt/redis-shaobing/slave/data


3.哨兵节点安装
[root@localhost src]# cd /soft/redis-4.0.14/src
[root@localhost src]# make PREFIX=/opt/redis-shaobing/sentinel install
[root@localhost src]# cp redis-trib.rb /opt/redis-shaobing/sentinel/
[root@localhost src]# mkdir -p /opt/redis-shaobing/sentinel/conf
[root@localhost src]# mkdir -p /opt/redis-shaobing/sentinel/logs

[root@localhost src]# mkdir -p /opt/redis-shaobing/sentinel/data

4.主节点配置文件(8001.conf)

 

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[root@localhost conf]# more 8001.conf bind 192.168.1.85 daemonize yes pidfile "/opt/redis-shaobing/master/run/redis-8001.pid" port 8001 tcp-backlog 511 timeout 300 tcp-keepalive 300 loglevel notice logfile "/opt/redis-shaobing/master/logs/redis-8001.log" databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename "dump.rdb" dir "/opt/redis-shaobing/master/data" 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 appendonly yes 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 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-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 # Generated by CONFIG REWRITE masterauth "hxlpasswd" requirepass "hxlpasswd" protected-mode yes

 

 

5.从节点配置文件

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[root@localhost conf]# more 8002.conf bind 192.168.1.85 daemonize yes pidfile "/opt/redis-shaobing/slave/run/redis-8002.pid" port 8002 tcp-backlog 511 timeout 300 tcp-keepalive 300 loglevel notice logfile "/opt/redis-shaobing/slave/logs/redis-8002.log" databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename "dump.rdb" dir "/opt/redis-shaobing/slave/data" 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 appendonly yes 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 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-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 # Generated by CONFIG REWRITE masterauth "hxlpasswd" requirepass "hxlpasswd" protected-mode yes slaveof 192.168.1.85 8001

 

注意这里slaveof

slaveof 192.168.1.85 8001

 

 

6.哨兵节点配置文件sentinel.conf

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port 8999 daemonize yes dir /opt/redis-shaobing/sentinel/data sentinel myid 3154c22b52f5fdca833d7a972bb0104e11e63b82 ##myid可以自己定义 sentinel monitor mymaster 192.168.1.85 8001 1  ##主节点信息 sentinel config-epoch mymaster 1 sentinel leader-epoch mymaster 1 sentinel down-after-milliseconds mymaster 15000 sentinel auth-pass mymaster hxlpasswd ##若是有密码验证的 这里必须加上该项 否则主从无法切换 logfile "/opt/redis-shaobing/sentinel/logs/sentinel.log" protected-mode no   # Generated by CONFIG REWRITE ##下面的选择项是系统切换后自动生成的,开始配置的时候不需要 sentinel leader-epoch mymaster 6 sentinel known-slave mymaster 192.168.1.85 8002 sentinel current-epoch 6

 

7.启动主从节点
主节点
/opt/redis-shaobing/master/bin/redis-server /opt/redis-shaobing/master/conf/8001.conf
从节点
/opt/redis-shaobing/slave/bin/redis-server /opt/redis-shaobing/slave/conf/8002.conf


验证主从节点的正确性
主库设置key
/opt/redis-shaobing/master/bin/redis-cli -h 192.168.1.85 -p 8001 -a hxlpasswd
192.168.1.85:7001> set name hxl

从库读取key
/opt/redis-shaobing/slave/bin/redis-cli -h 192.168.1.85 -p 8002 -a hxlpasswd
192.168.1.85:7002> get name
"hxl"

 

8.启动哨兵
/opt/redis-shaobing/sentinel/bin/redis-sentinel /opt/redis-shaobing/sentinel/conf/sentinel.conf

登陆哨兵
/opt/redis-shaobing/sentinel/bin/redis-cli -h 192.168.1.85 -p 8999
查看信息

 

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[root@localhost logs]# /opt/redis-shaobing/sentinel/bin/redis-cli -h 192.168.1.85 -p 8999 192.168.1.85:8999> info # Server redis_version:4.0.14 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:4af9eba2e02c1ef9 redis_mode:sentinel os:Linux 3.10.0-862.el7.x86_64 x86_64 arch_bits:64 multiplexing_api:epoll atomicvar_api:atomic-builtin gcc_version:4.8.5 process_id:17899 run_id:1b23616c45b7e0ff82aad6d5ea34f5065827c301 tcp_port:8999 uptime_in_seconds:12 uptime_in_days:0 hz:15 lru_clock:7441241 executable:/opt/redis-shaobing/sentinel/bin/redis-sentinel config_file:/opt/redis-shaobing/sentinel/conf/sentinel.conf   # Clients connected_clients:1 client_longest_output_list:0 client_biggest_input_buf:0 blocked_clients:0   # CPU used_cpu_sys:0.02 used_cpu_user:0.01 used_cpu_sys_children:0.00 used_cpu_user_children:0.00   # Stats total_connections_received:1 total_commands_processed:0 instantaneous_ops_per_sec:0 total_net_input_bytes:31 total_net_output_bytes:60 instantaneous_input_kbps:0.00 instantaneous_output_kbps:0.00 rejected_connections:0 sync_full:0 sync_partial_ok:0 sync_partial_err:0 expired_keys:0 expired_stale_perc:0.00 expired_time_cap_reached_count:0 evicted_keys:0 keyspace_hits:0 keyspace_misses:0 pubsub_channels:0 pubsub_patterns:0 latest_fork_usec:0 migrate_cached_sockets:0 slave_expires_tracked_keys:0 active_defrag_hits:0 active_defrag_misses:0 active_defrag_key_hits:0 active_defrag_key_misses:0   # 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=192.168.1.85:8001,slaves=0,sentinels=1

 

 

9.模拟主节点down掉
/opt/redis-shaobing/master/bin/redis-cli  -h 192.168.1.85 -p 8001 -a hxlpasswd shutdown


再次登陆哨兵查看信息,发现现在的主节点完成了切换
[root@localhost logs]# /opt/redis-shaobing/sentinel/bin/redis-cli -h 192.168.1.85 -p 8999
192.168.1.85:8999> info
.
.
.
前面输出省略
# 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=192.168.1.85:8002,slaves=1,sentinels=1

10.原来down掉的节点重启启动
启动后发现原来停掉的节点不会重新成为主节点,而是成为从节点

 

11.python程序连接哨兵模式

# !/usr/bin/env python
# -*- coding:utf-8 -*-
import redis
from redis.sentinel import Sentinel

# 连接哨兵服务器(主机名也可以用域名)
sentinel = Sentinel([('192.168.1.85', 8999)],socket_timeout=0.5)

# 获取主服务器地址
master = sentinel.discover_master('mymaster')
print(master)
# 获取从服务器地址
slave = sentinel.discover_slaves('mymaster')
print(slave)
# 获取主服务器进行写入
master = sentinel.master_for('mymaster', socket_timeout=0.5, password='hxlpasswd')
w_ret = master.set('foo', 'bar')
# 输出：True
# # 获取从服务器进行读取（默认是round-roubin）
slave = sentinel.slave_for('mymaster', socket_timeout=0.5, password='hxlpasswd')
r_ret = slave.get('foo')
print(r_ret)
# # 输出：bar