设备环境
每个redis 节点采用相同的相同的redis版本、相同的密码、硬件配置
所有redis服务器必须没有任何数据
10.0.0.17 centos7 redis5.0
10.0.0.27 centos7 redis5.0
10.0.0.37 centos7 redis5.0
10.0.0.47 centos7 redis5.0
10.0.0.57 centos7 redis5.0
10.0.0.67 centos7 redis5.0
1、配置文件修改
redis配置文件修改，redis.conf
手动修改
[root@centos7-liyj ~]#vim /etc/redis.conf bind 0.0.0.0 masterauth 123456 #建议配置，否则后期的master和slave主从复制无法成功，还需再配置 requirepass 123456 cluster-enabled yes #取消此行注释,必须开启集群，开启后redis 进程会有cluster标识 cluster-config-file nodes-6379.conf #取消此行注释,此为集群状态文件,记录主从关系及 slot范围信息,由redis cluster 集群自动创建和维护 cluster-require-full-coverage no #默认值为yes,设为no可以防止一个节点不可用导致整 个cluster不可能
复制到其他节点上
[root@centos7-liyj ~]#scp /apps/redis/etc/redis.conf 10.0.0.27:/apps/redis/etc/ The authenticity of host '10.0.0.27 (10.0.0.27)' can't be established. ECDSA key fingerprint is SHA256:a8HZZS4TTvzQbF1/XJKDZvry1Lwa+9/jYIYXRPwqfIk. ECDSA key fingerprint is MD5:41:d8:d4:69:09:2c:35:d3:0a:91:79:cd:0e:e5:10:14. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '10.0.0.27' (ECDSA) to the list of known hosts. root@10.0.0.27's password: redis.conf 100% 60KB 18.5MB/s 00:00 [root@centos7-liyj ~]#scp /apps/redis/etc/redis.conf 10.0.0.37:/apps/redis/etc/ The authenticity of host '10.0.0.37 (10.0.0.37)' can't be established. ECDSA key fingerprint is SHA256:a8HZZS4TTvzQbF1/XJKDZvry1Lwa+9/jYIYXRPwqfIk. ECDSA key fingerprint is MD5:41:d8:d4:69:09:2c:35:d3:0a:91:79:cd:0e:e5:10:14. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '10.0.0.37' (ECDSA) to the list of known hosts. root@10.0.0.37's password: redis.conf 100% 60KB 27.3MB/s 00:00 [root@centos7-liyj ~]#scp /apps/redis/etc/redis.conf 10.0.0.47:/apps/redis/etc/ The authenticity of host '10.0.0.47 (10.0.0.47)' can't be established. ECDSA key fingerprint is SHA256:a8HZZS4TTvzQbF1/XJKDZvry1Lwa+9/jYIYXRPwqfIk. ECDSA key fingerprint is MD5:41:d8:d4:69:09:2c:35:d3:0a:91:79:cd:0e:e5:10:14. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '10.0.0.47' (ECDSA) to the list of known hosts. root@10.0.0.47's password: redis.conf 100% 60KB 29.3MB/s 00:00 [root@centos7-liyj ~]#scp /apps/redis/etc/redis.conf 10.0.0.57:/apps/redis/etc/ The authenticity of host '10.0.0.57 (10.0.0.57)' can't be established. ECDSA key fingerprint is SHA256:a8HZZS4TTvzQbF1/XJKDZvry1Lwa+9/jYIYXRPwqfIk. ECDSA key fingerprint is MD5:41:d8:d4:69:09:2c:35:d3:0a:91:79:cd:0e:e5:10:14. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '10.0.0.57' (ECDSA) to the list of known hosts. root@10.0.0.57's password: Permission denied, please try again. root@10.0.0.57's password: redis.conf 100% 60KB 23.3MB/s 00:00 [root@centos7-liyj ~]#scp /apps/redis/etc/redis.conf 10.0.0.67:/apps/redis/etc/ The authenticity of host '10.0.0.67 (10.0.0.67)' can't be established. ECDSA key fingerprint is SHA256:a8HZZS4TTvzQbF1/XJKDZvry1Lwa+9/jYIYXRPwqfIk. ECDSA key fingerprint is MD5:41:d8:d4:69:09:2c:35:d3:0a:91:79:cd:0e:e5:10:14. Are you sure you want to continue connecting (yes/no)? yte^H^H^H Please type 'yes' or 'no': yes Warning: Permanently added '10.0.0.67' (ECDSA) to the list of known hosts. root@10.0.0.67's password: Permission denied, please try again. root@10.0.0.67's password: redis.conf 100% 60KB 42.1MB/s 00:00
所有所有节点启动或重启redis服务
systemctl enable --now redis #redis未启动，执行此行 systemctl restart redis #redis已经启动，重启即可
redis集群配置
创建集群
#命令redis-cli的选项 –cluster-replicas 1 表示每个master对应一个slave节点
[root@centos7-liyj ~]#redis-cli -a 123456 --cluster create 10.0.0.17:6379 10.0.0.27:6379 10.0.0.37:6379 10.0.0.47:6379 10.0.0.57:6379 10.0.0.67:6379 --cluster-replicas 1 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. >>> Performing hash slots allocation on 6 nodes... Master[0] -> Slots 0 - 5460 Master[1] -> Slots 5461 - 10922 Master[2] -> Slots 10923 - 16383 Adding replica 10.0.0.57:6379 to 10.0.0.17:6379 Adding replica 10.0.0.67:6379 to 10.0.0.27:6379 Adding replica 10.0.0.47:6379 to 10.0.0.37:6379 M: 97b46220a05f4ec75a07ee0a468dc0a871d715a3 10.0.0.17:6379 #带M的为master slots:[0-5460] (5461 slots) master #当前master的槽位起始 和结束位 M: ec6ec291571a8d16629897b3aa0628ac5c161820 10.0.0.27:6379 slots:[5461-10922] (5462 slots) master M: bd51f66ca1a1b07be2f0f0fd7ae1f829475a6809 10.0.0.37:6379 slots:[10923-16383] (5461 slots) master S: 0f63f38aa1cf2f330a7d2f96c647f3d96533ea9a 10.0.0.47:6379 #带S的slave replicates bd51f66ca1a1b07be2f0f0fd7ae1f829475a6809 S: 04db5ec527aa1c3b62a8a743b145bb3e1467249d 10.0.0.57:6379 replicates 97b46220a05f4ec75a07ee0a468dc0a871d715a3 S: 32e7a2cd069a3fbff823ac9661dd20bdc9fcc012 10.0.0.67:6379 replicates ec6ec291571a8d16629897b3aa0628ac5c161820 Can I set the above configuration? (type 'yes' to accept): yes #输入yes自动创建集群 >>> 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 10.0.0.17:6379) M: 97b46220a05f4ec75a07ee0a468dc0a871d715a3 10.0.0.17:6379 slots:[0-5460] (5461 slots) master #已经分配的槽位 1 additional replica(s) #分配了一个slave S: 0f63f38aa1cf2f330a7d2f96c647f3d96533ea9a 10.0.0.47:6379 slots: (0 slots) slave #slave没有分配槽位 replicates bd51f66ca1a1b07be2f0f0fd7ae1f829475a6809 #对应的master的10.0.0.37的 ID S: 32e7a2cd069a3fbff823ac9661dd20bdc9fcc012 10.0.0.67:6379 slots: (0 slots) slave replicates ec6ec291571a8d16629897b3aa0628ac5c161820 #对应的master的10.0.0.27的ID S: 04db5ec527aa1c3b62a8a743b145bb3e1467249d 10.0.0.57:6379 slots: (0 slots) slave replicates 97b46220a05f4ec75a07ee0a468dc0a871d715a3 #对应的master的10.0.0.17的 ID M: ec6ec291571a8d16629897b3aa0628ac5c161820 10.0.0.27:6379 slots:[5461-10922] (5462 slots) master 1 additional replica(s) M: bd51f66ca1a1b07be2f0f0fd7ae1f829475a6809 10.0.0.37:6379 slots:[10923-16383] (5461 slots) master 1 additional replica(s) [OK] All nodes agree about slots configuration. #所有节点槽位分配完成 >>> Check for open slots... #检查打开的槽位 >>> Check slots coverage... #检查插槽覆盖范围 [OK] All 16384 slots covered. #所有槽位(16384个)分配完成
查看主从状态
10.0.0.17 节点 [root@centos7-liyj ~]#redis-cli -a 123456 -c INFO replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:1 slave0:ip=10.0.0.57,port=6379,state=online,offset=1204,lag=1 master_replid:7b55e11479093abac4b63c965839dbcff729a016 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:1218 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:1218
10.0.0.27节点 [root@centos7-liyj ~]#redis-cli -a 123456 -c INFO replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:1 slave0:ip=10.0.0.67,port=6379,state=online,offset=1204,lag=0 master_replid:a45fc1d876fcd29a7f9877b60b7228102e8abb38 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:1218 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:1218
10.0.0.37节点 [root@centos7-liyj ~]#redis-cli -a 123456 -c INFO replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:1 slave0:ip=10.0.0.47,port=6379,state=online,offset=1204,lag=1 master_replid:f226151c30ebce938d03e773f544b43b6fcbfe13 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:1218 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:1218
10.0.0.47节点 [root@centos7-liyj ~]#redis-cli -a 123456 -c INFO replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:10.0.0.37 master_port:6379 master_link_status:up master_last_io_seconds_ago:0 master_sync_in_progress:0 slave_repl_offset:1218 slave_priority:100 slave_read_only:1 connected_slaves:0 master_replid:f226151c30ebce938d03e773f544b43b6fcbfe13 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:1218 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:1218
10.0.0.57节点 [root@centos7-liyj ~]#redis-cli -a 123456 -c INFO replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:10.0.0.17 master_port:6379 master_link_status:up master_last_io_seconds_ago:1 master_sync_in_progress:0 slave_repl_offset:1218 slave_priority:100 slave_read_only:1 connected_slaves:0 master_replid:7b55e11479093abac4b63c965839dbcff729a016 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:1218 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:1218
10.0.0.67节点 [root@centos7-lyj ~]#redis-cli -a 123456 -c INFO replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:10.0.0.27 master_port:6379 master_link_status:up master_last_io_seconds_ago:1 master_sync_in_progress:0 slave_repl_offset:1218 slave_priority:100 slave_read_only:1 connected_slaves:0 master_replid:a45fc1d876fcd29a7f9877b60b7228102e8abb38 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:1218 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:1218
验证集群状态
[root@centos7-lyj ~]#redis-cli -a 123456 cluster info Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. cluster_state:ok cluster_slots_assigned:16384 cluster_slots_ok:16384 cluster_slots_pfail:0 cluster_slots_fail:0 cluster_known_nodes:6 cluster_size:3 cluster_current_epoch:6 cluster_my_epoch:2 cluster_stats_messages_ping_sent:1284 cluster_stats_messages_pong_sent:1228 cluster_stats_messages_meet_sent:5 cluster_stats_messages_sent:2517 cluster_stats_messages_ping_received:1228 cluster_stats_messages_pong_received:1289 cluster_stats_messages_received:2517
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