redis主从复制|redis主从复制,哨兵以及集群搭建部署 redis主从复制|哨兵以及集群搭

redis主从复制 1.redis支持多实例的功能,一台机器上,可以运行多个单个的redis数据库

环境准备,运行3个redis数据库,达到1主 2从的配置主库6379.conf port 6379 daemonize yes pidfile /data/6379/redis.pid loglevel notice logfile "/data/6379/redis.log" dbfilename dump.rdb dir /data/6379从库 6380 port 6380 daemonize yes pidfile /data/6380/redis.pid loglevel notice logfile "/data/6380/redis.log" dbfilename dump.rdb dir /data/6380 slaveof127.0.0.16379 从库 6381 port 6381 daemonize yes pidfile /data/6381/redis.pid loglevel notice logfile "/data/6381/redis.log" dbfilename dump.rdb dir /data/6381 slaveof127.0.0.16379 [root@mcw01 ~/msRedis]$ ls [root@mcw01 ~/msRedis]$ tree /data/ /data/ ├── 6379 ├── 6380 └── 63813 directories, 0 files [root@mcw01 ~/msRedis]$ vim 6379.conf [root@mcw01 ~/msRedis]$ vim 6380.conf [root@mcw01 ~/msRedis]$ vim 6381.conf [root@mcw01 ~/msRedis]$ cat 6379.conf port 6379 daemonize yes pidfile /data/6379/redis.pid loglevel notice logfile "/data/6379/redis.log" dbfilename dump.rdb dir /data/6379 [root@mcw01 ~/msRedis]$ cat 6380.conf port 6380 daemonize yes pidfile /data/6380/redis.pid loglevel notice logfile "/data/6380/redis.log" dbfilename dump.rdb dir /data/6380 [root@mcw01 ~/msRedis]$ redis-server 6379.conf [root@mcw01 ~/msRedis]$ redis-server 6380.conf#创建三个配置文件，并启动redis服务 [root@mcw01 ~/msRedis]$ redis-server 6381.conf [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis root2527010 11:43 ?00:00:00 redis-server *:6379 root2527510 11:43 ?00:00:00 redis-server *:6380 root2528010 11:43 ?00:00:00 redis-server *:6381 [root@mcw01 ~/msRedis]$ redis-cli 127.0.0.1:6379> keys * (empty list or set) 127.0.0.1:6379> set name1 mcw1 OK 127.0.0.1:6379> keys * 1) "name1" 127.0.0.1:6379> [root@mcw01 ~/msRedis]$ redis-cli -p 6380 #6379上创建的key，在6380和6381上都看不到，三者没有关系 127.0.0.1:6380> get name1 (nil) 127.0.0.1:6380> keys * (empty list or set) 127.0.0.1:6380> [root@mcw01 ~/msRedis]$ redis-cli -p 6381 127.0.0.1:6381> keys * (empty list or set) 127.0.0.1:6381> [root@mcw01 ~/msRedis]$ redis-cli -p 6379 get name1#连接进入的后面加命令，像MySQL一样的免交互执行命令 "mcw1" [root@mcw01 ~/msRedis]$ tree /data/#查看目录结构 /data/ ├── 6379 │├── redis.log │└── redis.pid ├── 6380 │├── redis.log │└── redis.pid └── 6381 ├── redis.log └── redis.pid3 directories, 6 files [root@mcw01 ~/msRedis]$

2.开启主从复制功能

redis-cli info#查看数据库信息，查出所有 redis-cli info replication#快速查看复制信息。只查info里的Replication部分在6380 和6381数据库上 ,配置主从信息,通过参数形式修改配置,临时生效,注意要写入配置文件 redis-cli -p 6380 slaveof 127.0.0.1 6379 redis-cli -p 6381 slaveof 127.0.0.1 6379此时检查6379的复制信息,以及6380 6381的复制信息redis-cli -p 6380 info replication redis-cli -p 6381 info replication主从复制是读写分离的,master可写,slave只读[root@mcw01 ~/msRedis]$ redis-cli -p 6379 info # Server redis_version:4.0.10 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:279e3e51d6e7969b redis_mode:standalone os:Linux 3.10.0-693.el7.x86_64 x86_64 arch_bits:64 multiplexing_api:epoll atomicvar_api:atomic-builtin gcc_version:4.8.5 process_id:25270 run_id:29d570833f783120fd9e884ea8d4108384abaeae tcp_port:6379 uptime_in_seconds:466 uptime_in_days:0 hz:10 lru_clock:2371478 executable:/root/msRedis/redis-server config_file:/root/msRedis/6379.conf# Clients connected_clients:1 client_longest_output_list:0 client_biggest_input_buf:0 blocked_clients:0# Memory used_memory:849456 used_memory_human:829.55K used_memory_rss:7688192 used_memory_rss_human:7.33M used_memory_peak:849456 used_memory_peak_human:829.55K used_memory_peak_perc:100.12% used_memory_overhead:836206 used_memory_startup:786504 used_memory_dataset:13250 used_memory_dataset_perc:21.05% total_system_memory:1911832576 total_system_memory_human:1.78G used_memory_lua:37888 used_memory_lua_human:37.00K maxmemory:0 maxmemory_human:0B maxmemory_policy:noeviction mem_fragmentation_ratio:9.05 mem_allocator:jemalloc-4.0.3 active_defrag_running:0 lazyfree_pending_objects:0# Persistence loading:0 rdb_changes_since_last_save:1 rdb_bgsave_in_progress:0 rdb_last_save_time:1646538180 rdb_last_bgsave_status:ok rdb_last_bgsave_time_sec:-1 rdb_current_bgsave_time_sec:-1 rdb_last_cow_size:0 aof_enabled:0 aof_rewrite_in_progress:0 aof_rewrite_scheduled:0 aof_last_rewrite_time_sec:-1 aof_current_rewrite_time_sec:-1 aof_last_bgrewrite_status:ok aof_last_write_status:ok aof_last_cow_size:0# Stats total_connections_received:3 total_commands_processed:5 instantaneous_ops_per_sec:0 total_net_input_bytes:131 total_net_output_bytes:10197 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:1 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# Replication role:master connected_slaves:0 master_replid:e3784eb64085052e7107d06d1fc605ae6dbb5b59 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:0 second_repl_offset:-1 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0# CPU used_cpu_sys:0.32 used_cpu_user:0.11 used_cpu_sys_children:0.00 used_cpu_user_children:0.00# Cluster cluster_enabled:0# Keyspace db0:keys=1,expires=0,avg_ttl=0 [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ redis-cli -p 6379 info replication#现在6379是master，但是连接的从为0 # Replication role:master connected_slaves:0 master_replid:e3784eb64085052e7107d06d1fc605ae6dbb5b59 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:0 second_repl_offset:-1 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0 [root@mcw01 ~/msRedis]$ redis-cli -p 6379 info keyspace#info加上后面这个keyspace，就是info里被注释的英文 # Keyspace db0:keys=1,expires=0,avg_ttl=0 [root@mcw01 ~/msRedis]$ redis-cli -p 6379 info cluster # Cluster cluster_enabled:0 [root@mcw01 ~/msRedis]$ 开启主从复制功能[root@mcw01 ~/msRedis]$redis-cli -p 6380 slaveof 127.0.0.1 6379#开启6380为6379的从 OK [root@mcw01 ~/msRedis]$ redis-cli -p 6381 slaveof 127.0.0.1 6379#开启6381为6379的从 OK [root@mcw01 ~/msRedis]$ redis-cli -p 6379 info replication#查看主6379的信息，角色是主，连接的从有两个，从0和从1的ip端口等信息 # Replication role:master connected_slaves:2 slave0:ip=127.0.0.1,port=6381,state=online,offset=28,lag=0 slave1:ip=127.0.0.1,port=6380,state=online,offset=28,lag=0 master_replid:99b8b1b5d61e13152f4025821626574ed7f92ac9 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:28 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:28 [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication#查看从6380的复制信息。角色是从，主的ip端口是什么，主的连接状态，是否只读等信息 # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:up master_last_io_seconds_ago:2 master_sync_in_progress:0 slave_repl_offset:56 slave_priority:100 slave_read_only:1 connected_slaves:0 master_replid:99b8b1b5d61e13152f4025821626574ed7f92ac9 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:56 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:56 [root@mcw01 ~/msRedis]$ 再来查看刚刚主上创建的数据，现在已经复制到从库上去了 [root@mcw01 ~/msRedis]$ redis-cli -p 6379 127.0.0.1:6379> keys * 1) "name1" 127.0.0.1:6379> [root@mcw01 ~/msRedis]$ redis-cli -p 6380 keys * (error) ERR wrong number of arguments for 'keys' command [root@mcw01 ~/msRedis]$ redis-cli -p 6380 127.0.0.1:6380> keys * 1) "name1" 127.0.0.1:6380> [root@mcw01 ~/msRedis]$ redis-cli -p 6381 127.0.0.1:6381> keys * 1) "name1" 127.0.0.1:6381> [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ redis-cli -p 6379#在主上创建一个新的数据，也很快同步到从上去了，说明主从复制正常运行 127.0.0.1:6379> set name2 mcw2 OK 127.0.0.1:6379> [root@mcw01 ~/msRedis]$ redis-cli -p 6381 127.0.0.1:6381> keys * 1) "name1" 2) "name2" 127.0.0.1:6381> 127.0.0.1:6381> set name3 mcw3#然后在从上写入一个数据，发现从是只读的。这也是实现了读写分离的 (error) READONLY You can't write against a read only slave. 127.0.0.1:6381> [root@mcw01 ~/msRedis]$ 如果命令行设置了主从复制了，但是没有写进配置文件，需要记得把执行过的命令加进去，这样即使重启redis，也会自动加载上。 slaveof127.0.0.16379

3.模拟主从复制故障,手动切换master-slave身份

1.杀死6379进程 ,干掉主库 2.手动切换 6381为新的主库,需要先关闭它的从库身份 redis-cli -p 6381slaveof no one 3.修改6380的新主库是 6381 redis-cli -p 6380 slaveof127.0.0.1 63811.杀死6379进程 ,干掉主库 [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis root2527010 11:43 ?00:00:02 redis-server *:6379 root2527510 11:43 ?00:00:02 redis-server *:6380 root2528010 11:43 ?00:00:02 redis-server *:6381 [root@mcw01 ~/msRedis]$ kill 25270 [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis root2527510 11:43 ?00:00:02 redis-server *:6380 root2528010 11:43 ?00:00:02 redis-server *:6381 [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication#虽然主库已经杀掉了，但是现在还是连接的6379 # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:down .......... [root@mcw01 ~/msRedis]$ redis-cli -p 6381 info replication # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:down master_last_io_seconds_ago:-1 master_sync_in_progress:0 ........ [root@mcw01 ~/msRedis]$ 2.手动切换 6381为新的主库,需要先关闭它的从库身份 redis-cli -p 6381slaveof no one [root@mcw01 ~/msRedis]$ redis-cli -p 6381slaveof no one# OK [root@mcw01 ~/msRedis]$ redis-cli -p 6381 127.0.0.1:6381> keys * 1) "name1" 2) "name2" 127.0.0.1:6381> set name3 mcw3 #取消它从库身份，就可以写入数据了 OK 127.0.0.1:6381> [root@mcw01 ~/msRedis]$ redis-cli -p 6381 info replication#查看自己的复制信息，是主了，现在还没有从 # Replication role:master connected_slaves:0 ........ [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication#查看6380，现在的从不是新的主6381的从，需要手动修改 # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:down ...... [root@mcw01 ~/msRedis]$ 3.修改6380的新主库是 6381 redis-cli -p 6380 slaveof127.0.0.1 6381[root@mcw01 ~/msRedis]$ redis-cli -p 6380 slaveof127.0.0.1 6381 OK [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication#上面是修改新的主，下面是查看已经修改成功，连接状态up # Replication role:slave master_host:127.0.0.1 master_port:6381 master_link_status:up ......... [root@mcw01 ~/msRedis]$ redis-cli -p 6380#从上面可以看到刚刚主上创建的name3了 127.0.0.1:6380> keys * 1) "name2" 2) "name3" 3) "name1" 127.0.0.1:6380> [root@mcw01 ~/msRedis]$ redis-cli -p 6381 #主上创建一条数据name4 127.0.0.1:6381> set name4 mcw4 OK 127.0.0.1:6381> [root@mcw01 ~/msRedis]$ redis-cli -p 6380 #从上能查到新建的数据集name4.并且从不能写入数据，是只读的。 127.0.0.1:6380> keys * 1) "name2" 2) "name3" 3) "name1" 4) "name4" 127.0.0.1:6380> set name5 mcw5 (error) READONLY You can't write against a read only slave. 127.0.0.1:6380> [root@mcw01 ~/msRedis]$

哨兵搭建 redis哨兵高可用
redis-sentinel功能
环境准备:redis主从复制集群部署

三个redis数据库实例 ,配置好 1主 2从的配置6379.conf port 6379 daemonize yes logfile "6379.log" dbfilename "dump-6379.rdb" dir "/var/redis/data/"6380.conf port 6380 daemonize yes logfile "6380.log" dbfilename "dump-6380.rdb" dir "/var/redis/data/" slaveof 127.0.0.1 63796381.conf port 6381 daemonize yes logfile "6381.log" dbfilename "dump-6381.rdb" dir "/var/redis/data/" slaveof 127.0.0.1 6379[root@mcw01 ~/msRedis]$ ps -ef|grep redis root2527510 11:43 ?00:00:08 redis-server *:6380 root2528010 11:43 ?00:00:07 redis-server *:6381 root45901251540 13:51 pts/000:00:00 grep --color=auto redis [root@mcw01 ~/msRedis]$ kill 25275 [root@mcw01 ~/msRedis]$ kill 25280 [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ ps -ef|grep redis root45903251540 13:51 pts/000:00:00 grep --color=auto redis [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ ls 6379.conf6380.conf6381.conf [root@mcw01 ~/msRedis]$ vim 6380.conf [root@mcw01 ~/msRedis]$ vim 6381.conf [root@mcw01 ~/msRedis]$ cat 6379.conf port 6379 daemonize yes pidfile /data/6379/redis.pid loglevel notice logfile "/data/6379/redis.log" dbfilename dump.rdb dir /data/6379 [root@mcw01 ~/msRedis]$ cat 6380.conf#我这里直接写进配置文件，这样用配置文件启动redis，就不需要执行相关命令了 port 6380 daemonize yes pidfile /data/6380/redis.pid loglevel notice logfile "/data/6380/redis.log" dbfilename dump.rdb dir /data/6380 slaveof 127.0.0.1 6379 [root@mcw01 ~/msRedis]$ redis-server 6379.conf [root@mcw01 ~/msRedis]$ redis-server 6380.conf [root@mcw01 ~/msRedis]$ redis-server 6381.conf [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis#启动三个服务 root4594910 13:53 ?00:00:00 redis-server *:6379 root4595410 13:53 ?00:00:00 redis-server *:6380 root4596010 13:53 ?00:00:00 redis-server *:6381 [root@mcw01 ~/msRedis]$ redis-cli -p 6379 info replication#查看主从复制情况，一主两从正常 # Replication role:master connected_slaves:2 slave0:ip=127.0.0.1,port=6380,state=online,offset=84,lag=1 slave1:ip=127.0.0.1,port=6381,state=online,offset=84,lag=0 ........ [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:up ....... [root@mcw01 ~/msRedis]$

环境准备:redis三个redis哨兵进程部署

三个redis哨兵进程,指定好,检测着谁也是准备三个配置文件,内容如下sentinel-26379.conf port 26379 dir /var/redis/data/ logfile "26379.log"// 当前Sentinel节点监控 192.168.182.130:6379 这个主节点 // 2代表判断主节点失败至少需要2个Sentinel节点节点同意 // mymaster是主节点的别名 sentinel monitor s21ms0.0.0.0 6379 2//每个Sentinel节点都要定期PING命令来判断Redis数据节点和其余Sentinel节点是否可达，如果超过30000毫秒30s且没有回复，则判定不可达 sentinel down-after-milliseconds s21ms20000//当Sentinel节点集合对主节点故障判定达成一致时，Sentinel领导者节点会做故障转移操作，选出新的主节点，原来的从节点会向新的主节点发起复制操作，限制每次向新的主节点发起复制操作的从节点个数为1 sentinel parallel-syncs mymaster 1//故障转移超时时间为180000毫秒 sentinel failover-timeout mymaster 180000#三个哨兵的配置文件,一模一样,仅仅是端口的区别 #三个哨兵的配置文件,一模一样,仅仅是端口的区别 #三个哨兵的配置文件,一模一样,仅仅是端口的区别 #三个哨兵的配置文件,一模一样,仅仅是端口的区别 sentinel-26380.confsentinel-26381.conf2.分别启动三个redis数据库,以及三个哨兵进程 ,注意 ,哨兵第一次启动后,会修改配置文件,如果错了,得删除配置文件,重新写 2.分别启动三个redis数据库,以及三个哨兵进程 ,注意 ,哨兵第一次启动后,会修改配置文件,如果错了,得删除配置文件,重新写 2.分别启动三个redis数据库,以及三个哨兵进程 ,注意 ,哨兵第一次启动后,会修改配置文件,如果错了,得删除配置文件,重新写 2.分别启动三个redis数据库,以及三个哨兵进程 ,注意 ,哨兵第一次启动后,会修改配置文件,如果错了,得删除配置文件,重新写配置文件在这里,这里用的是127.0.0.1 sentinel-26379.conf port 26379 dir /var/redis/data/ logfile "26379.log" sentinel monitor s21ms127.0.0.16379 2 sentinel down-after-milliseconds s21ms20000 sentinel parallel-syncs s21ms 1 sentinel failover-timeout s21ms 180000 #加一个后台运行 daemonize yes #仅仅是端口的不同 sentinel-26380.conf sentinel-26381.conf #启动 1244redis-sentinel sentinel-26379.conf 1245redis-sentinel sentinel-26380.conf 1246redis-sentinel sentinel-26381.conf sentinel-26379.conf port 26379 dir /data/sentinel logfile "26379.log" sentinel monitor mcw127.0.0.16379 2 sentinel down-after-milliseconds mcw20000 sentinel parallel-syncs mcw1 sentinel failover-timeout mcw180000 daemonize yes[root@mcw01 ~/msRedis]$ ss -lntup|grep 6379 tcpLISTEN0511*:6379*:*users:(("redis-server",pi tcpLISTEN0511:::6379:::*users:(("redis-server",pi [root@mcw01 ~/msRedis]$ ss -anp|grep 6379 tcpLISTEN0511*:6379*:*users:(("redis-server",pi tcpESTAB00127.0.0.1:6379127.0.0.1:39093users:(("redis- tcpESTAB00127.0.0.1:6379127.0.0.1:39091users:(("redis- tcpESTAB00127.0.0.1:39093127.0.0.1:6379users:(("redis- tcpESTAB00127.0.0.1:39091127.0.0.1:6379users:(("redis- tcpLISTEN0511:::6379:::*users:(("redis-server",pi [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ ls /data/63 6379/ 6380/ 6381/ [root@mcw01 ~/msRedis]$ mkdir /data/sentinel [root@mcw01 ~/msRedis]$ vim 26379.conf [root@mcw01 ~/msRedis]$ sed "s#26379#26380#g" 26379.conf >26380.conf [root@mcw01 ~/msRedis]$ sed "s#26379#26381#g" 26379.conf >26381.conf [root@mcw01 ~/msRedis]$ cat 26379.conf port 26379 dir /data/sentinel logfile "26379.log" sentinel monitor mcw127.0.0.16379 2 sentinel down-after-milliseconds mcw20000 sentinel parallel-syncs mcw1 sentinel failover-timeout mcw180000 daemonize yes [root@mcw01 ~/msRedis]$ cat 26380.conf port 26380 dir /data/sentinel logfile "26380.log" sentinel monitor mcw127.0.0.16379 2 sentinel down-after-milliseconds mcw20000 sentinel parallel-syncs mcw1 sentinel failover-timeout mcw180000 daemonize yes [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ ls 26379.conf26380.conf26381.conf6379.conf6380.conf6381.conf [root@mcw01 ~/msRedis]$ mv 26379.confsentinel-26379.conf#起个方便看的名字把 [root@mcw01 ~/msRedis]$ mv 26380.confsentinel-26380.conf [root@mcw01 ~/msRedis]$ mv 26381.confsentinel-26381.conf [root@mcw01 ~/msRedis]$ ls 6379.conf6380.conf6381.confsentinel-26379.confsentinel-26380.confsentinel-26381.conf [root@mcw01 ~/msRedis]$ 报错： [root@mcw01 ~/msRedis]$ redis-server sentinel-26379.conf*** FATAL CONFIG FILE ERROR *** Reading the configuration file, at line 4 >>> 'sentinel monitor mcw127.0.0.16379 2' sentinel directive while not in sentinel mode [root@mcw01 ~/msRedis]$部署哨兵模式的时候，使用的命令不对造成的，正确的命令如下： ./redis-server.sh sentinel.conf --sentinel为了避免把后面的--sentinel竟然给忘了类似的事情发生，建议使用redis-sentinel sentinel.conf代替redis-server命令[root@mcw01 ~/msRedis]$ redis-sentinel sentinel-26379.conf [root@mcw01 ~/msRedis]$ redis-sentinel sentinel-26380.conf [root@mcw01 ~/msRedis]$ redis-sentinel sentinel-26381.conf [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis#启动了三个哨兵 root4594910 13:53 ?00:00:01 redis-server *:6379 root4595410 13:53 ?00:00:02 redis-server *:6380 root4596010 13:53 ?00:00:02 redis-server *:6381 root4606111 14:27 ?00:00:00 redis-sentinel *:26379 [sentinel] root4606610 14:28 ?00:00:00 redis-sentinel *:26380 [sentinel] root4607110 14:28 ?00:00:00 redis-sentinel *:26381 [sentinel] [root@mcw01 ~/msRedis]$ ls 6379.conf6380.conf6381.confsentinel-26379.confsentinel-26380.confsentinel-26381.conf [root@mcw01 ~/msRedis]$ cat 6379.conf port 6379 daemonize yes pidfile /data/6379/redis.pid loglevel notice logfile "/data/6379/redis.log" dbfilename dump.rdb dir /data/6379 [root@mcw01 ~/msRedis]$ cat sentinel-26379.conf#查看配置，启动后配置被重写了，添加了部分配置 port 26379 dir "/data/sentinel" logfile "26379.log" sentinel myid 750ea6253069388e5897651086d50af8fc604a7f sentinel monitor mcw 127.0.0.1 6379 2 sentinel down-after-milliseconds mcw 20000 sentinel config-epoch mcw 0 daemonize yes # Generated by CONFIG REWRITE sentinel leader-epoch mcw 0 sentinel known-slave mcw 127.0.0.1 6380 sentinel known-slave mcw 127.0.0.1 6381 sentinel known-sentinel mcw 127.0.0.1 26380 3098a36a80a4d1f1b3f01f9a332c8abdf21ee56a sentinel known-sentinel mcw 127.0.0.1 26381 50aa98a452708c83334286a9a8e2f06cef1f9fd2 sentinel current-epoch 0 [root@mcw01 ~/msRedis]$

3.验证哨兵是否正常

redis-cli -p 26379 info sentinelmaster0:name=s21ms,status=ok,address=127.0.0.1:6379,slaves=2,sentinels=3 哨兵的名字，状态，监控的地址，监控的从的数量，以及哨兵的个数。查看到哨兵的信息，就说明哨兵的部署是正常的[root@mcw01 ~/msRedis]$ 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=mcw,status=ok,address=127.0.0.1:6379,slaves=2,sentinels=3 [root@mcw01 ~/msRedis]$

4.干掉主库 ,检查主从切换状态

1253kill -9 12749 1254ps -ef|grep redis 1255redis-cli -p 6380 info replication 1256redis-cli -p 6381 info replication 1257redis-cli -p 6380 info replication 1258redis-cli -p 6381 info replication [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis root4594910 13:53 ?00:00:02 redis-server *:6379 root4595410 13:53 ?00:00:03 redis-server *:6380 root4596010 13:53 ?00:00:02 redis-server *:6381 root4606110 14:27 ?00:00:02 redis-sentinel *:26379 [sentinel] root4606610 14:28 ?00:00:01 redis-sentinel *:26380 [sentinel] root4607110 14:28 ?00:00:01 redis-sentinel *:26381 [sentinel] [root@mcw01 ~/msRedis]$ kill 45949#杀掉主服务 [root@mcw01 ~/msRedis]$ ps -ef|grep -v grep |grep redis root4595410 13:53 ?00:00:03 redis-server *:6380 root4596010 13:53 ?00:00:03 redis-server *:6381 root4606110 14:27 ?00:00:02 redis-sentinel *:26379 [sentinel] root4606610 14:28 ?00:00:02 redis-sentinel *:26380 [sentinel] root4607110 14:28 ?00:00:02 redis-sentinel *:26381 [sentinel] [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication#迅速查看80和81，发现主从复制链接down了，但是还是指向79的 # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:down ....... [root@mcw01 ~/msRedis]$ redis-cli -p 6381 info replication # Replication role:slave master_host:127.0.0.1 master_port:6379 master_link_status:down ........ [root@mcw01 ~/msRedis]$ [root@mcw01 ~/msRedis]$ redis-cli -p 6380 info replication#过一会再看，大约20秒。发现81已经自动成为主了，80已经成为81的从了，实现了自动故障转移 # Replication role:slave master_host:127.0.0.1 master_port:6381 master_link_status:up ....... [root@mcw01 ~/msRedis]$ redis-cli -p 6381 info replication # Replication role:master connected_slaves:1 slave0:ip=127.0.0.1,port=6380,state=online,offset=166686,lag=0 ........ [root@mcw01 ~/msRedis]$

redis-cluster搭建环境准备

1.准备好6个redis节点的配置文件 redis-7000.conf port 7000 daemonize yes dir "/opt/redis/data" logfile "7000.log" dbfilename "dump-7000.rdbcluster-enabled yes#开启集群模式 cluster-config-file nodes-7000.conf#集群内部的配置文件 cluster-require-full-coverage no #redis cluster需要16384个slot都正常的时候才能对外提供服务，换句话说，只要任何一个slot异常那么整个cluster不对外提供服务。因此生产环境一般为no#6个配置文件,仅仅是端口的区别 redis-7000.conf port 7000 daemonize yes dir "/opt/redis/data" logfile "7000.log" dbfilename "dump-7000.rdb" cluster-enabled yes cluster-config-file nodes-7000.conf cluster-require-full-coverage noredis-7001.conf redis-7002.conf redis-7003.conf redis-7004.conf redis-7005.conf [root@mcw01 ~/msRedis]$ cd cluster/ [root@mcw01 ~/msRedis/cluster]$ ls 7000.conf7001.conf7002.conf7003.conf7004.conf [root@mcw01 ~/msRedis/cluster]$ cat 7000.conf port 7000 daemonize yes dir "/opt/redis/data" logfile "7000.log" dbfilename "dump-7000.rdb cluster-enabled yes cluster-config-file nodes-7000.conf cluster-require-full-coverage no [root@mcw01 ~/msRedis/cluster]$ sed "s#7000#7005#g" 7000.conf >7005.conf [root@mcw01 ~/msRedis/cluster]$ ls 7000.conf7001.conf7002.conf7003.conf7004.conf7005.conf [root@mcw01 ~/msRedis/cluster]$ cat 7005.conf port 7005 daemonize yes dir "/opt/redis/data" logfile "7005.log" dbfilename "dump-7005.rdb cluster-enabled yes cluster-config-file nodes-7005.conf cluster-require-full-coverage no [root@mcw01 ~/msRedis/cluster]$

2.根据配置文件启动6个节点

1288redis-server 7000.conf 1290redis-server 7001.conf 1291redis-server 7002.conf 1292redis-server 7003.conf 1293redis-server 7004.conf 1294redis-server 7005.conf 如下，6个集群的结点7000-7005已经起来了，并且显示是cluster [root@mcw01 ~/msRedis/cluster]$ ls 7000.conf7001.conf7002.conf7003.conf7004.conf7005.conf [root@mcw01 ~/msRedis/cluster]$ mkdir /opt/redis/data mkdir: cannot create directory ‘/opt/redis/data’: No such file or directory [root@mcw01 ~/msRedis/cluster]$ mkdir -p/opt/redis/data [root@mcw01 ~/msRedis/cluster]$ ps -ef|grep -v grep|grep redis root4595410 13:53 ?00:00:06 redis-server *:6380 root4596010 13:53 ?00:00:06 redis-server *:6381 root4606110 14:27 ?00:00:07 redis-sentinel *:26379 [sentinel] root4606610 14:28 ?00:00:07 redis-sentinel *:26380 [sentinel] root4607110 14:28 ?00:00:07 redis-sentinel *:26381 [sentinel] [root@mcw01 ~/msRedis/cluster]$ [root@mcw01 ~/msRedis/cluster]$ redis-se redis-sentinelredis-server [root@mcw01 ~/msRedis/cluster]$ redis-server 7000.conf [root@mcw01 ~/msRedis/cluster]$ redis-server 7001.conf [root@mcw01 ~/msRedis/cluster]$ redis-server 7002.conf [root@mcw01 ~/msRedis/cluster]$ redis-server 7003.conf [root@mcw01 ~/msRedis/cluster]$ redis-server 7004.conf [root@mcw01 ~/msRedis/cluster]$ redis-server 7005.conf [root@mcw01 ~/msRedis/cluster]$ ps -ef|grep -v grep|grep redis root4595410 13:53 ?00:00:06 redis-server *:6380 root4596010 13:53 ?00:00:06 redis-server *:6381 root4606110 14:27 ?00:00:08 redis-sentinel *:26379 [sentinel] root4606610 14:28 ?00:00:07 redis-sentinel *:26380 [sentinel] root4607110 14:28 ?00:00:07 redis-sentinel *:26381 [sentinel] root4629310 15:17 ?00:00:00 redis-server *:7000 [cluster] root4629810 15:17 ?00:00:00 redis-server *:7001 [cluster] root4630310 15:18 ?00:00:00 redis-server *:7002 [cluster] root4630810 15:18 ?00:00:00 redis-server *:7003 [cluster] root4631310 15:18 ?00:00:00 redis-server *:7004 [cluster] root4631811 15:18 ?00:00:00 redis-server *:7005 [cluster] [root@mcw01 ~/msRedis/cluster]$

3.分配redis slot 槽位

-手动写c语言分配 -使用ruby大神写的一个redis模块,自动分配现在登录上去，添加一个数据，显示槽位没有被提供。意思是，7000这个节点没有分配槽位，而数据是放到槽位里的。 [root@mcw01 ~/msRedis/cluster]$ redis-cli -p 7000 127.0.0.1:7000> keys * (empty list or set) 127.0.0.1:7000> set name1 mcw1 (error) CLUSTERDOWN Hash slot not served 127.0.0.1:7000> [root@mcw01 ~/msRedis/cluster]$

4.配置ruby脚本环境

1.yum安装最简单 yum installruby2.自动配置好 PATH环境变量 ruby和gem的环境变量3.下载ruby操作redis的模块 wget http://rubygems.org/downloads/redis-3.3.0.gem4.用ruby的包管理工具 gem 安装这个模块gem install -l redis-3.3.0.gemruby和python一样的解释型语言，gem相当于pip[root@mcw01 ~/msRedis/cluster]$ wget http://rubygems.org/downloads/redis-3.3.0.gem --2022-03-06 16:10:28--http://rubygems.org/downloads/redis-3.3.0.gem Resolving rubygems.org (rubygems.org)... 151.101.193.227, 151.101.1.227, 151.101.65.227, ... Connecting to rubygems.org (rubygems.org)|151.101.193.227|:80... failed: Connection timed out. Connecting to rubygems.org (rubygems.org)|151.101.1.227|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 92160 (90K) [application/octet-stream] Saving to: ‘redis-3.3.0.gem’100%[===============================================================>] 92,160--.-K/sin 0.08s2022-03-06 16:10:31 (1.12 MB/s) - ‘redis-3.3.0.gem’ saved [92160/92160][root@mcw01 ~/msRedis/cluster]$ ls 7000.conf7001.conf7002.conf7003.conf7004.conf7005.confredis-3.3.0.gem [root@mcw01 ~/msRedis/cluster]$ gem install -l redis-3.3.0.gem Successfully installed redis-3.3.0 Parsing documentation for redis-3.3.0 Installing ri documentation for redis-3.3.0 1 gem installed

5.通过ruby一键分配redis-cluster集群的槽位

找到机器上的redis-trib.rb命令,用绝对命令创建开启集群,分配槽位 /opt/redis-4.0.10/src/redis-trib.rbcreate --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005如下已经分配好槽位了 [root@mcw01 ~/msRedis/cluster]$ /opt/redis-4.0.10/src/redis-trib.rbcreate --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 >>> Creating cluster >>> Performing hash slots allocation on 6 nodes... Using 3 masters: #三个主，三个复制的从 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 Adding replica 127.0.0.1:7004 to 127.0.0.1:7000 Adding replica 127.0.0.1:7005 to 127.0.0.1:7001 Adding replica 127.0.0.1:7003 to 127.0.0.1:7002 >>> Trying to optimize slaves allocation for anti-affinity [WARNING] Some slaves are in the same host as their master M: 2d2654b26e43f6245b41dc2cae44f7bb6ec846bb 127.0.0.1:7000#三个主上分别分配了槽位区间 slots:0-5460 (5461 slots) master M: 102d887feee9b5d2db0284ecff83d893f4736aef 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: c2ba927b42526110a7f840643a1c653057c6b811 127.0.0.1:7002 slots:10923-16383 (5461 slots) master S: 22bcee4dc0439600aae268b9de093db39d73e2cf 127.0.0.1:7003 replicates c2ba927b42526110a7f840643a1c653057c6b811 S: fb7ed8949b7ab36351aabe72a9cb1ae8f859d6d8 127.0.0.1:7004 replicates 2d2654b26e43f6245b41dc2cae44f7bb6ec846bb S: cc0da6e5df726d65df53849dd92e2edd6ef66760 127.0.0.1:7005 replicates 102d887feee9b5d2db0284ecff83d893f4736aef Can I set the above configuration? (type 'yes' to accept): yes #接受分配 >>> Nodes configuration updated >>> Assign a different config epoch to each node >>> Sending CLUSTER MEET messages to join the cluster Waiting for the cluster to join..... >>> Performing Cluster Check (using node 127.0.0.1:7000) M: 2d2654b26e43f6245b41dc2cae44f7bb6ec846bb 127.0.0.1:7000 slots:0-5460 (5461 slots) master 1 additional replica(s) M: 102d887feee9b5d2db0284ecff83d893f4736aef 127.0.0.1:7001 slots:5461-10922 (5462 slots) master 1 additional replica(s) S: 22bcee4dc0439600aae268b9de093db39d73e2cf 127.0.0.1:7003 slots: (0 slots) slave replicates c2ba927b42526110a7f840643a1c653057c6b811 S: fb7ed8949b7ab36351aabe72a9cb1ae8f859d6d8 127.0.0.1:7004 slots: (0 slots) slave replicates 2d2654b26e43f6245b41dc2cae44f7bb6ec846bb M: c2ba927b42526110a7f840643a1c653057c6b811 127.0.0.1:7002 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: cc0da6e5df726d65df53849dd92e2edd6ef66760 127.0.0.1:7005 slots: (0 slots) slave replicates 102d887feee9b5d2db0284ecff83d893f4736aef [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.#分配槽位成功 [root@mcw01 ~/msRedis/cluster]$

6.分配好集群后,可以向集群内写入数据了

redis-cli -c指定集群模式,登录数据库登录redis写入数据,发现槽位分配,且重定向之后,集群搭建成功集群模式登录redis。 [root@mcw01 ~/msRedis/cluster]$ redis-cli -c -p 7000 127.0.0.1:7000> keys * (empty list or set) 127.0.0.1:7000> set name1 mcw1#7000上设置数据，分配的槽位是12933，它在10923-16383之间，也就是7002服务上 -> Redirected to slot [12933] located at 127.0.0.1:7002 OK 127.0.0.1:7002> keys *#添加之后，自动切换到7002服务了 1) "name1" 127.0.0.1:7002> get name1 "mcw1" 127.0.0.1:7002> [root@mcw01 ~/msRedis/cluster]$ redis-cli -c -p 7000#退出重新登录7000服务 127.0.0.1:7000> keys *#key不在7000上 (empty list or set) 127.0.0.1:7000> get name1#7000上能get到其它节点上的数据，数据存储在其它节点上的槽位， -> Redirected to slot [12933] located at 127.0.0.1:7002 "mcw1" 127.0.0.1:7002> keys *#get到之后，命令行切换到这个数据所在节点上 1) "name1" 127.0.0.1:7002> [root@mcw01 ~/msRedis/cluster]$

【redis主从复制|redis主从复制,哨兵以及集群搭建部署】