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社区首页 >问答首页 >sentinel不能在故障转移后将初始主服务器提升回主模式。

问sentinel不能在故障转移后将初始主服务器提升回主模式。
EN

Stack Overflow用户
提问于 2019-11-05 07:23:33
回答 1查看 1.8K关注 0票数 2

我在哨兵模式下运行红星，有一个主节点，两个副本节点和三个哨兵节点。我在码头群环境中运行所有的节点。所有节点都启动正常。开始时，我们有以下用于节点的IP

代码语言：javascript
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master      10.0.20.2 
replica-1   10.0.20.5
replica-2   10.0.20.10

接下来，我将停止主容器以使主节点下降，以便哨兵应该选择一个副本节点作为新的主节点。这样做很好，并选择replica-1节点作为新的主节点。

同时，码头商群为master建立了新的容器，并将其作为从站加入到redis哨兵网络中。

接下来，我将replica-1节点恢复为另一个故障转移。现在，当哨兵试图将master节点从从节点升级到主节点时，就会发生实际的问题。

下面是master节点redis配置文件，当哨兵试图使其成为主程序时。当这个节点是新的主节点并且IP是同一个节点时，我想知道为什么这个文件是用replicaof 10.0.20.2 6379更新的。主节点redis.conf

代码语言：javascript
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root@0fd67f6ceb37:/data# tail -f /etc/redis/redis.conf
replica-announce-ip "redis-master"
#replica-announce-port 6379
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error no
rdbchecksum yes
# Generated by CONFIG REWRITE

replicaof 10.0.20.2 6379

这是错误的配置，因此它有时会失败，sentinel会选择replica-2节点作为新的主节点，这就是当master节点日志(下面是详细的日志文件) Master is currently unable to PSYNC but should be in the future: -NOMASTERLINK Can't SYNC while not connected with my master时所看到的错误，最后replica-2充当master和replica-1，而主节点充当两个从站。

主节点记录(这是在主节点作为从节点和哨兵试图将其提升到主模式之后)

代码语言：javascript
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[docker@chopswarm1 redis-failover]$ d logs 0fd67f6ceb37
1:C 05 Nov 2019 06:43:49.360 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 05 Nov 2019 06:43:49.360 # Redis version=5.0.5, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 05 Nov 2019 06:43:49.360 # Configuration loaded
1:M 05 Nov 2019 06:43:49.361 * Running mode=standalone, port=6379.
1:M 05 Nov 2019 06:43:49.361 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:M 05 Nov 2019 06:43:49.361 # Server initialized
1:M 05 Nov 2019 06:43:49.361 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
1:M 05 Nov 2019 06:43:49.361 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
1:M 05 Nov 2019 06:43:49.361 * DB loaded from disk: 0.000 seconds
1:M 05 Nov 2019 06:43:49.361 * Ready to accept connections
1:S 05 Nov 2019 06:43:59.817 * Before turning into a replica, using my master parameters to synthesize a cached master: I may be able to synchronize with the new master with just a partial transfer.
1:S 05 Nov 2019 06:43:59.817 * REPLICAOF 10.0.20.5:6379 enabled (user request from 'id=5 addr=10.0.20.7:60534 fd=10 name=sentinel-38a1e461-cmd age=10 idle=0 flags=x db=0 sub=0 psub=0 multi=3 qbuf=148 qbuf-free=32620 obl=36 oll=0 omem=0 events=r cmd=exec')
1:S 05 Nov 2019 06:43:59.817 # CONFIG REWRITE executed with success.
1:S 05 Nov 2019 06:44:00.386 * Connecting to MASTER 10.0.20.5:6379
1:S 05 Nov 2019 06:44:00.387 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:00.387 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:44:00.387 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:44:00.387 * Trying a partial resynchronization (request 0b1ed09c8d497744632c93cab960c4ca4ee9a11e:1).
1:S 05 Nov 2019 06:44:00.388 * Full resync from master: f3c311652d8860c93048eba075521df7033cab2f:38645
1:S 05 Nov 2019 06:44:00.388 * Discarding previously cached master state.
1:S 05 Nov 2019 06:44:00.486 * MASTER <-> REPLICA sync: receiving 178 bytes from master
1:S 05 Nov 2019 06:44:00.486 * MASTER <-> REPLICA sync: Flushing old data
1:S 05 Nov 2019 06:44:00.486 * MASTER <-> REPLICA sync: Loading DB in memory
1:S 05 Nov 2019 06:44:00.486 * MASTER <-> REPLICA sync: Finished with success
1:S 05 Nov 2019 06:44:35.367 # Connection with master lost.
1:S 05 Nov 2019 06:44:35.367 * Caching the disconnected master state.
1:S 05 Nov 2019 06:44:35.464 * Connecting to MASTER 10.0.20.5:6379
1:S 05 Nov 2019 06:44:35.465 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:35.465 # Error condition on socket for SYNC: Connection refused
1:S 05 Nov 2019 06:44:36.466 * Connecting to MASTER 10.0.20.5:6379
1:S 05 Nov 2019 06:44:36.466 * MASTER <-> REPLICA sync started
1:M 05 Nov 2019 06:44:40.748 # Setting secondary replication ID to f3c311652d8860c93048eba075521df7033cab2f, valid up to offset: 46004. New replication ID is 77213f07383dd307e4b6d917b6a8789de42cad20
1:M 05 Nov 2019 06:44:40.748 * Discarding previously cached master state.
1:M 05 Nov 2019 06:44:40.748 * MASTER MODE enabled (user request from 'id=16 addr=10.0.20.7:60576 fd=17 name=sentinel-38a1e461-cmd age=31 idle=0 flags=x db=0 sub=0 psub=0 multi=3 qbuf=140 qbuf-free=32628 obl=36 oll=0 omem=0 events=r cmd=exec')
1:M 05 Nov 2019 06:44:40.748 # CONFIG REWRITE executed with success.
1:M 05 Nov 2019 06:44:41.881 * Replica redis-replica-2:6379 asks for synchronization
1:M 05 Nov 2019 06:44:41.881 * Partial resynchronization request from redis-replica-2:6379 accepted. Sending 881 bytes of backlog starting from offset 46004.
1:S 05 Nov 2019 06:44:43.132 # Connection with replica redis-replica-2:6379 lost.
1:S 05 Nov 2019 06:44:43.132 * Before turning into a replica, using my master parameters to synthesize a cached master: I may be able to synchronize with the new master with just a partial transfer.
1:S 05 Nov 2019 06:44:43.132 * REPLICAOF 10.0.20.2:6379 enabled (user request from 'id=24 addr=10.0.20.7:60636 fd=15 name=sentinel-38a1e461-cmd age=3 idle=0 flags=x db=0 sub=0 psub=0 multi=3 qbuf=291 qbuf-free=32477 obl=36 oll=0 omem=0 events=r cmd=exec')
1:S 05 Nov 2019 06:44:43.133 # CONFIG REWRITE executed with success.
1:S 05 Nov 2019 06:44:43.484 * Connecting to MASTER 10.0.20.2:6379
1:S 05 Nov 2019 06:44:43.484 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:43.484 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:44:43.484 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:44:43.484 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).
1:S 05 Nov 2019 06:44:43.484 * Master is currently unable to PSYNC but should be in the future: -NOMASTERLINK Can't SYNC while not connected with my master
1:S 05 Nov 2019 06:44:44.489 * Connecting to MASTER 10.0.20.2:6379
1:S 05 Nov 2019 06:44:44.489 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:44.489 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:44:44.489 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:44:44.490 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).
1:S 05 Nov 2019 06:44:44.490 * Master is currently unable to PSYNC but should be in the future: -NOMASTERLINK Can't SYNC while not connected with my master
1:S 05 Nov 2019 06:44:45.489 * Connecting to MASTER 10.0.20.2:6379
1:S 05 Nov 2019 06:44:45.490 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:45.490 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:44:45.490 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:44:45.490 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).
1:S 05 Nov 2019 06:44:45.490 * Master is currently unable to PSYNC but should be in the future: -NOMASTERLINK Can't SYNC while not connected with my master
1:S 05 Nov 2019 06:44:46.493 * Connecting to MASTER 10.0.20.2:6379
1:S 05 Nov 2019 06:44:46.493 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:46.493 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:44:46.493 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:44:46.493 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).
1:S 05 Nov 2019 06:44:46.494 * Master is currently unable to PSYNC but should be in the future: -NOMASTERLINK Can't SYNC while not connected with my master
1:S 05 Nov 2019 06:44:47.493 * Connecting to MASTER 10.0.20.2:6379
1:S 05 Nov 2019 06:44:47.494 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:44:47.494 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:44:47.494 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:44:47.494 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).

<-- omitted few entries for the same errors as above for better readability -->

1:S 05 Nov 2019 06:45:21.575 * Connecting to MASTER 10.0.20.2:6379
1:S 05 Nov 2019 06:45:21.575 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:45:21.575 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:45:21.575 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:45:21.575 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).
1:S 05 Nov 2019 06:45:21.575 * Master is currently unable to PSYNC but should be in the future: -NOMASTERLINK Can't SYNC while not connected with my master
1:S 05 Nov 2019 06:45:22.456 * REPLICAOF 10.0.20.10:6379 enabled (user request from 'id=113 addr=10.0.20.7:60950 fd=12 name=sentinel-38a1e461-cmd age=5 idle=0 flags=x db=0 sub=0 psub=0 multi=3 qbuf=150 qbuf-free=32618 obl=36 oll=0 omem=0 events=r cmd=exec')
1:S 05 Nov 2019 06:45:22.456 # CONFIG REWRITE executed with success.
1:S 05 Nov 2019 06:45:22.577 * Connecting to MASTER 10.0.20.10:6379
1:S 05 Nov 2019 06:45:22.577 * MASTER <-> REPLICA sync started
1:S 05 Nov 2019 06:45:22.577 * Non blocking connect for SYNC fired the event.
1:S 05 Nov 2019 06:45:22.577 * Master replied to PING, replication can continue...
1:S 05 Nov 2019 06:45:22.577 * Trying a partial resynchronization (request 77213f07383dd307e4b6d917b6a8789de42cad20:46885).
1:S 05 Nov 2019 06:45:22.577 * Successful partial resynchronization with master.
1:S 05 Nov 2019 06:45:22.577 # Master replication ID changed to 3235720aad34423d6f82f9db4a953042c1f16d58
1:S 05 Nov 2019 06:45:22.577 * MASTER <-> REPLICA sync: Master accepted a Partial Resynchronization.

前哨日志文件(在故障转移启动时添加了额外的换行)

代码语言：javascript
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root@3708cf05eca4:/data# cat sentinel.log
1:X 05 Nov 2019 06:40:49.116 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:X 05 Nov 2019 06:40:49.116 # Redis version=5.0.5, bits=64, commit=00000000, modified=0, pid=1, just started
1:X 05 Nov 2019 06:40:49.116 # Configuration loaded
1:X 05 Nov 2019 06:40:49.117 * Running mode=sentinel, port=26379.
1:X 05 Nov 2019 06:40:49.117 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:X 05 Nov 2019 06:40:49.119 # Sentinel ID is 38a1e461910e17fb7be79e695040074df2dde2df
1:X 05 Nov 2019 06:40:49.119 # +monitor master eaas-redis-master 10.0.20.2 6379 quorum 2
1:X 05 Nov 2019 06:40:49.120 * +slave slave redis-replica-1:6379 10.0.20.5 6379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:40:51.183 * +sentinel sentinel 3b0831ce9f6aff70f9bf45f4211d66ebfd1c6a21 10.0.20.33 26379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:40:59.150 * +slave slave redis-replica-2:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:40:59.202 * +fix-slave-config slave redis-replica-1:6379 10.0.20.5 6379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:41:01.362 * +sentinel sentinel 464f3750404b419fccf513784f40baf7f6622cba 10.0.20.41 26379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:41:09.249 * +fix-slave-config slave redis-replica-2:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.2 6379



1:X 05 Nov 2019 06:43:48.513 # +sdown master eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:43:48.594 # +new-epoch 1
1:X 05 Nov 2019 06:43:48.595 # +vote-for-leader 464f3750404b419fccf513784f40baf7f6622cba 1
1:X 05 Nov 2019 06:43:48.613 # +odown master eaas-redis-master 10.0.20.2 6379 #quorum 2/2
1:X 05 Nov 2019 06:43:48.613 # Next failover delay: I will not start a failover before Tue Nov  5 06:43:59 2019
1:X 05 Nov 2019 06:43:49.732 # +config-update-from sentinel 464f3750404b419fccf513784f40baf7f6622cba 10.0.20.41 26379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:43:49.732 # +switch-master eaas-redis-master 10.0.20.2 6379 10.0.20.5 6379
1:X 05 Nov 2019 06:43:49.732 * +slave slave 10.0.20.10:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:43:49.732 * +slave slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:43:49.785 * +slave slave redis-replica-2:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:43:59.816 * +convert-to-slave slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:09.832 * +slave slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379



1:X 05 Nov 2019 06:44:40.453 # +sdown master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:40.524 # +odown master eaas-redis-master 10.0.20.5 6379 #quorum 2/2
1:X 05 Nov 2019 06:44:40.524 # +new-epoch 2
1:X 05 Nov 2019 06:44:40.524 # +try-failover master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:40.525 # +vote-for-leader 38a1e461910e17fb7be79e695040074df2dde2df 2
1:X 05 Nov 2019 06:44:40.525 # 3b0831ce9f6aff70f9bf45f4211d66ebfd1c6a21 voted for 3b0831ce9f6aff70f9bf45f4211d66ebfd1c6a21 2
1:X 05 Nov 2019 06:44:40.528 # 464f3750404b419fccf513784f40baf7f6622cba voted for 38a1e461910e17fb7be79e695040074df2dde2df 2
1:X 05 Nov 2019 06:44:40.580 # +elected-leader master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:40.580 # +failover-state-select-slave master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:40.681 # +selected-slave slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:40.681 * +failover-state-send-slaveof-noone slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:40.748 * +failover-state-wait-promotion slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:41.003 # +promoted-slave slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:41.003 # +failover-state-reconf-slaves master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:41.101 * +slave-reconf-sent slave 10.0.20.10:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:41.598 # -odown master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:42.050 * +slave-reconf-inprog slave 10.0.20.10:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:42.050 * +slave-reconf-done slave 10.0.20.10:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:42.107 * +slave-reconf-sent slave redis-replica-2:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:43.056 * +slave-reconf-inprog slave redis-replica-2:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:43.056 * +slave-reconf-done slave redis-replica-2:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:43.132 * +slave-reconf-sent slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:44.111 * +slave-reconf-inprog slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:46.056 # +failover-end-for-timeout master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:46.056 # +failover-end master eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:46.056 * +slave-reconf-sent-be slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:46.056 * +slave-reconf-sent-be slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.5 6379
1:X 05 Nov 2019 06:44:46.056 # +switch-master eaas-redis-master 10.0.20.5 6379 10.0.20.2 6379
1:X 05 Nov 2019 06:44:46.057 * +slave slave 10.0.20.10:6379 10.0.20.10 6379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:44:46.057 * +slave slave 10.0.20.5:6379 10.0.20.5 6379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:44:51.062 # +sdown slave 10.0.20.5:6379 10.0.20.5 6379 @ eaas-redis-master 10.0.20.2 6379


1:X 05 Nov 2019 06:45:11.226 # +sdown master eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:45:16.233 # +new-epoch 3
1:X 05 Nov 2019 06:45:16.234 # +vote-for-leader 464f3750404b419fccf513784f40baf7f6622cba 3
1:X 05 Nov 2019 06:45:16.535 # +odown master eaas-redis-master 10.0.20.2 6379 #quorum 3/2
1:X 05 Nov 2019 06:45:16.535 # Next failover delay: I will not start a failover before Tue Nov  5 06:45:26 2019
1:X 05 Nov 2019 06:45:17.285 # +config-update-from sentinel 464f3750404b419fccf513784f40baf7f6622cba 10.0.20.41 26379 @ eaas-redis-master 10.0.20.2 6379
1:X 05 Nov 2019 06:45:17.285 # +switch-master eaas-redis-master 10.0.20.2 6379 10.0.20.10 6379
1:X 05 Nov 2019 06:45:17.285 * +slave slave 10.0.20.5:6379 10.0.20.5 6379 @ eaas-redis-master 10.0.20.10 6379
1:X 05 Nov 2019 06:45:17.285 * +slave slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.10 6379
1:X 05 Nov 2019 06:45:22.456 * +fix-slave-config slave 10.0.20.2:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.10 6379
1:X 05 Nov 2019 06:45:26.347 * +slave slave redis-replica-1:6379 10.0.20.5 6379 @ eaas-redis-master 10.0.20.10 6379
1:X 05 Nov 2019 06:45:26.348 * +slave slave redis-master:6379 10.0.20.2 6379 @ eaas-redis-master 10.0.20.10 6379
root@3708cf05eca4:/data#

因此，我想知道为什么哨兵只为主节点用replicaof重写配置文件(当master节点提升到主模式时，只对master节点进行重写，而不是对副本节点进行重写)，我如何改进这个场景，以便如果sentinel在故障转移期间接收到主节点，那么master节点可以在主模式下再次运行。

如果需要更多的信息，请告诉我。

下面是启动码头群堆栈时主节点和副本节点的redis配置文件。redis.conf(master)

代码语言：javascript
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dir /data/

replica-announce-ip {{REDIS_MASTER}}

save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error no
rdbchecksum yes

redis.conf(replica)

代码语言：javascript
复制
replicaof {{REDIS_MASTER}} 6379
dir /data/

replica-announce-ip {{REDIS_REPLICA}}

save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error no
rdbchecksum yes
redis
docker-swarm
redis-sentinel
docker
EN

回答 1

Stack Overflow用户

发布于 2020-06-15 13:54:12

与码头集装箱IP相比，码头服务有一些特定的问题：https://github.com/moby/moby/issues/30963

因此，当您设置REDIS_MASTER_HOST: redis-master (例如)环境时，它指向停靠服务IP，而不是实际的redis-主容器IP -而这种行为违反了哨位逻辑。

我在docker中使用了这种配置(注意dnsrr endpoint_mode)：

代码语言：javascript
复制
redis-master:
 image: bitnami/redis:5.0.9
 environment:
   REDIS_REPLICATION_MODE: master
   ALLOW_EMPTY_PASSWORD: 'yes'
   REDIS_AOF_ENABLED: 'no'
 deploy:
   endpoint_mode: dnsrr

此配置为redis主DNS服务记录和容器本身提供了一个IP。但在这种情况下，在redis-主容器重新启动后，IP地址将发生变化，因此在失败后，我使用命令重新创建了哨兵配置：

代码语言：javascript
复制
# on redis-master
redis-cli SLAVEOF <new IP master> 6379
# on all sentinel nodes
redis-cli -p 26379 SENTINEL REMOVE mymaster
redis-cli -p 26379 SENTINEL monitor mymaster <new IP redis-master> 6379 2

在此操作之后，redis-master将正确地更改角色。

另一种选择：

我要求在码头群环境中为redis获得正确的IP：https://github.com/bitnami/bitnami-docker-redis/issues/174。

我创建了https://github.com/tartemov/bitnami-docker-redis ( dns_lookup函数有一个变化)

在本例中，docker-组合文件如下所示：

代码语言：javascript
复制
services:
 redis-master:
  image: ndocker-registry/redis:5.0.9
  hostname: "redis-master"
   environment:
     REDIS_REPLICATION_MODE: master
     ALLOW_EMPTY_PASSWORD: 'yes'
     REDIS_AOF_ENABLED: 'no'
 redis-slave-1:
   image: docker-registry/redis:5.0.9
   environment:
     REDIS_REPLICATION_MODE: slave
     REDIS_MASTER_HOST: redis-master
     ALLOW_EMPTY_PASSWORD: 'yes'
     REDIS_AOF_ENABLED: 'no'
sentinel:
  image: bitnami/redis-sentinel:5.0.9-debian-10-r49
  environment:
    REDIS_MASTER_HOST: redis-master
    ALLOW_EMPTY_PASSWORD: 'yes'
    REDIS_AOF_ENABLED: 'no'
    REDIS_SENTINEL_DOWN_AFTER_MILLISECONDS: 5000
    REDIS_SENTINEL_FAILOVER_TIMEOUT: 60000
  deploy:
    mode: replicated
    replicas: 3

注主机名属性-使用此属性和新的dns_lookup函数，redis可以注释IP地址。

而且您不需要运行任何手动操作-服务地址不会更改，哨兵将正确设置任何redis节点的角色。

票数 3
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/58706332

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