Redis - 手动故障转移有效，但自动故障转移无效

2024-5-31 • tag-icon

我有一个节点 Redis 集群，有 1 个主节点和 2 个从节点。Sentinel 在所有节点上运行。

master 172.29.245.6
slave1 172.29.240.163
slave2 172.29.225.104

随着我的主服务器启动，这是我的集群的状态。

版本 --> redis-3.2.10-2.el7.x86_64

掌握

# Replication
role:master
connected_slaves:2
slave0:ip=172.29.225.104,port=6379,state=online,offset=486,lag=1
slave1:ip=172.29.240.163,port=6379,state=online,offset=633,lag=0
master_repl_offset:925
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:924

从属1

# Replication
role:slave
master_host:172.29.245.6
master_port:6379
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_repl_offset:17719
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0

从站2

# Replication
role:slave
master_host:172.29.245.6
master_port:6379
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_repl_offset:20367
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0

我的目标是，当我关闭主 redis 进程时，其中一个从属进程应该成为主进程。

但是，当我尝试进行自动故障转移时，它会显示以下消息。

Oct 27 14:18:22 redis-2 redis-sentinel[4866]: 4866:X 27 Oct 14:18:22.175 # +new-epoch 27
Oct 27 14:18:22 redis-2 redis-sentinel[4866]: 4866:X 27 Oct 14:18:22.175 # +try-failover master redis-master 172.29.245.6 6379
Oct 27 14:18:22 redis-2 redis-sentinel[4866]: 4866:X 27 Oct 14:18:22.185 # +vote-for-leader 61c51a37f2db1673ddcf5dc3fe6816c9ba83a408 27
Oct 27 14:18:33 redis-2 redis-sentinel[4866]: 4866:X 27 Oct 14:18:33.142 # -failover-abort-not-elected master redis-master 172.29.245.6 6379
Oct 27 14:18:33 redis-2 redis-sentinel[4866]: 4866:X 27 Oct 14:18:33.218 # Next failover delay: I will not start a failover before Fri Oct 27 14:20:23 2017

但是，当我使用该方法手动进行故障转移时，它就起作用了。

[root@redis-1 ~]# redis-cli -p 26379 SENTINEL failover redis-master
OK

Oct 27 14:19:40 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:19:40.503 # -sdown master redis-master 172.29.245.6 6379
Oct 27 14:19:40 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:19:40.503 # -odown master redis-master 172.29.245.6 6379
Oct 27 14:24:56 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:24:56.982 # +new-epoch 28
Oct 27 14:24:57 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:24:57.851 # +config-update-from sentinel 5080eb7a0e27f9fb6ea6a197bf1abd334608943f 172.29.245.6 26379 @ redis-master 172.29.245.6 6379
Oct 27 14:24:57 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:24:57.852 # +switch-master redis-master 172.29.245.6 6379 172.29.225.104 6379
Oct 27 14:24:57 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:24:57.852 * +slave slave 172.29.240.163:6379 172.29.240.163 6379 @ redis-master 172.29.225.104 6379
Oct 27 14:24:57 redis-3 redis-sentinel[1211]: 1211:X 27 Oct 14:24:57.852 * +slave slave 172.29.245.6:6379 172.29.245.6 6379 @ redis-master 172.29.225.104 6379

我已阅读文档并严格遵循，但自动故障转移功能对我不起作用。有什么想法吗？

我的sentinel.conf所有节点上的样子如下：

掌握

port 26379
sentinel myid 5080eb7a0e27f9fb6ea6a197bf1abd334608943f
sentinel monitor redis-master 172.29.245.6 6379 1
sentinel down-after-milliseconds redis-master 5000
sentinel failover-timeout redis-master 60000
sentinel auth-pass redis-master XXXXXXXXXXXXXXXXX
# Generated by CONFIG REWRITE
dir "/"
sentinel config-epoch redis-master 29
sentinel leader-epoch redis-master 29
sentinel known-slave redis-master 172.29.225.104 6379
sentinel known-slave redis-master 172.29.240.163 6379
sentinel known-sentinel redis-master 172.29.240.163 26379 61c51a37f2db1673ddcf5dc3fe6816c9ba83a408
sentinel known-sentinel redis-master 172.29.225.104 26379 85e2ce3707304f7b3b4d0f7281dcd6932094c8b6
sentinel current-epoch 29

从属1

port 26379
sentinel myid 61c51a37f2db1673ddcf5dc3fe6816c9ba83a408
sentinel monitor redis-master 172.29.245.6 6379 1
sentinel down-after-milliseconds redis-master 5000
sentinel failover-timeout redis-master 60000
sentinel auth-pass redis-master XXXXXXXXXXXXXXXX

# Generated by CONFIG REWRITE
dir "/"
sentinel config-epoch redis-master 29
sentinel leader-epoch redis-master 27
sentinel known-slave redis-master 172.29.225.104 6379
sentinel known-slave redis-master 172.29.240.163 6379
sentinel known-sentinel redis-master 172.29.245.6 26379 5080eb7a0e27f9fb6ea6a197bf1abd334608943f
sentinel known-sentinel redis-master 172.29.225.104 26379 85e2ce3707304f7b3b4d0f7281dcd6932094c8b6
sentinel current-epoch 29

从站2

port 26379
sentinel myid 85e2ce3707304f7b3b4d0f7281dcd6932094c8b6
sentinel monitor redis-master 172.29.245.6 6379 1
sentinel down-after-milliseconds redis-master 5000
sentinel failover-timeout redis-master 60000
sentinel auth-pass redis-master XXXXXXXXXXXX

# Generated by CONFIG REWRITE
dir "/"
sentinel config-epoch redis-master 29
sentinel leader-epoch redis-master 26
sentinel known-slave redis-master 172.29.225.104 6379
sentinel known-slave redis-master 172.29.240.163 6379
sentinel known-sentinel redis-master 172.29.245.6 26379 5080eb7a0e27f9fb6ea6a197bf1abd334608943f
sentinel known-sentinel redis-master 172.29.240.163 26379 61c51a37f2db1673ddcf5dc3fe6816c9ba83a408
sentinel current-epoch 29

我的 Sentinel 配置也看起来不错：

[root@redis-1 ~]# 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=redismaster,status=ok,address=172.29.245.6:6379,slaves=2,sentinels=3

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