Redis-Sentinel在每个节点上都使用了slaveof

时间：2013-09-17 17:08:16

标签： redis master-slave redis-sentinel

我使用2.8 RC5 redis中的redis-sentinel来监控和故障转移我的redis节点。设置如下：

Sentinel节点

  • 服务器A
  • 服务器B
  • 服务器C

Redis节点

  • 服务器A（主）
  • 服务器B（服务器A的从属 - 在redis配置中使用slaveof）

在每个Sentinel节点上，我使用相同的配置：

sentinel monitor serverA serverA.mydomain.tld 6379 2
sentinel auth-pass serverA "MYAUTHPASS"
sentinel down-after-milliseconds serverA 10000
sentinel failover-timeout serverA 20000
sentinel can-failover serverA yes
sentinel parallel-syncs serverA 1

sentinel monitor serverB serverB.mydomain.tld 6379 4
sentinel auth-pass serverB "MYAUTHPASS"
sentinel down-after-milliseconds serverB 10000
sentinel failover-timeout serverB 20000
sentinel can-failover serverB yes
sentinel parallel-syncs serverB 5

我正在进行此测试：

  1. 启动两个redis-nodes
  2. 启动每个前哨节点（全部三个）
  3. 停止服务器A（主服务器）
  4. 服务器B成为主服务器
  5. 再次启动服务器A（主服务器）
  6. 停止服务器B（从属）
  7. 再次启动服务器B（从属）

    8. 现在，服务器A是服务器B的从属服务器，服务器A是服务器B的从属服务器。

    这是一个错误还是错误的配置？

    这些是步骤3（在服务器A上停止主服务器）后的标记日志

    [19569] 17 Sep 18:33:28.873 # +sdown master serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:28.873 # +sdown master serverB serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:29.073 # +odown master serverA serverA.mydomain.tld 6379 #quorum 3/2
[19569] 17 Sep 18:33:29.073 # +failover-triggered master serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:29.073 # +failover-state-wait-start master serverA serverA.mydomain.tld 6379 #starting in 6543 milliseconds
[19569] 17 Sep 18:33:35.700 # +failover-state-select-slave master serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:35.800 # +selected-slave slave serverB.mydomain.tld:6379 serverB.mydomain.tld 6379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:35.800 * +failover-state-send-slaveof-noone slave serverB.mydomain.tld:6379 serverB.mydomain.tld 6379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:35.900 * +failover-state-wait-promotion slave serverB.mydomain.tld:6379 serverB.mydomain.tld 6379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:36.204 # +promoted-slave slave serverB.mydomain.tld:6379 serverB.mydomain.tld 6379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:36.204 # +failover-state-reconf-slaves master serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:36.302 # +failover-end master serverA serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:36.302 # +switch-master serverA serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:37.196 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:38.107 # +failover-detected master serverB serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:38.206 # +failover-end master serverB serverA.mydomain.tld 6379
[19569] 17 Sep 18:33:38.206 # +switch-master serverB serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:41.322 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:41.322 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:42.105 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:46.329 # +sdown slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:33:48.233 # +sdown slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverB serverB.mydomain.tld 6379

    CONFIG GET slaveof

    概述
    • 服务器A：不在线
    • 服务器B：""

    这些是再次启动服务器A（主服务器）后的日志（步骤5）：

    [19569] 17 Sep 18:53:08.305 * +demote-old-slave slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:53:08.306 * +demote-old-slave slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 18:53:08.506 # -sdown slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:53:08.506 # -sdown slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 18:53:18.319 * +slave slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:53:18.319 * +slave slave serverA.mydomain.tld:6379 serverA.mydomain.tld 6379 @ serverB serverB.mydomain.tld 6379

    CONFIG GET slaveof

    概述
    • 服务器A："serverB.mydomain.tld"
    • 服务器B：""

    这些是停止服务器B（从属）后的日志：

    [19569] 17 Sep 18:58:38.375 # +sdown master serverB serverB.mydomain.tld 6379
[19569] 17 Sep 18:58:38.675 # +sdown master serverA serverB.mydomain.tld 6379
[19569] 17 Sep 18:58:38.876 # +odown master serverA serverB.mydomain.tld 6379 #quorum 3/2

    CONFIG GET slaveof

    概述
    • 服务器A："serverB.mydomain.tld"（此时似乎错了！）
    • 服务器B：不在线

    这些是再次启动服务器B（从属）后的日志：

    [19569] 17 Sep 19:00:59.892 * +reboot master serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:00:59.892 # +redirect-to-master serverB serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:00:59.892 * +reboot master serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:00:59.892 # +redirect-to-master serverA serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:00.012 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:00.012 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:05.008 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:05.008 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:09.907 # +redirect-to-master serverA serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:09.907 # +redirect-to-master serverB serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:10.029 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:10.029 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:10.046 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:10.046 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:19.925 # +redirect-to-master serverA serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:19.925 # +redirect-to-master serverB serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:20.096 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:20.096 * +sentinel sentinel serverC.mydomain.tld:263
[19569] 17 Sep 19:01:20.096 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:20.096 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:20.143 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:20.143 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:29.943 # +redirect-to-master serverA serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:29.943 # +redirect-to-master serverB serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:30.037 - Reading from client: Connection reset by peer
[19569] 17 Sep 19:01:30.140 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:30.140 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:30.156 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:30.156 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:39.962 # +redirect-to-master serverA serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:39.962 # +redirect-to-master serverB serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:40.169 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:40.169 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:40.191 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:40.191 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:49.980 # +redirect-to-master serverA serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:49.980 # +redirect-to-master serverB serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:50.180 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:50.180 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:50.256 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:50.256 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:01:59.999 # +redirect-to-master serverA serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:01:59.999 # +redirect-to-master serverB serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:02:00.193 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:02:00.193 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:02:00.313 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:02:00.313 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:02:10.013 # +redirect-to-master serverA serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:02:10.013 # +redirect-to-master serverB serverA.mydomain.tld 6379 serverB.mydomain.tld 6379
[19569] 17 Sep 19:02:10.209 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:02:10.209 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379
[19569] 17 Sep 19:02:10.450 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverB.mydomain.tld 6379
[19569] 17 Sep 19:02:10.450 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverB.mydomain.tld 6379

    CONFIG GET slaveof

    概述
    • 服务器A："serverB.mydomain.tld"（现在这是错的！）
    • 服务器B："serverA.mydomain.tld"（现在这是错的！）

    另外，这部分每5秒重复一次（无休止地）：

    [19569] 17 Sep 19:05:40.351 # +redirect-to-master serverA serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:05:40.351 # +redirect-to-master serverB serverB.mydomain.tld 6379 serverA.mydomain.tld 6379
[19569] 17 Sep 19:05:40.723 - Accepted serverB.mydomain.tld:38423
[19569] 17 Sep 19:05:40.724 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:05:40.724 - Accepted serverB.mydomain.tld:38424
[19569] 17 Sep 19:05:40.724 * +sentinel sentinel serverB.mydomain.tld:26379 serverB.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379
[19569] 17 Sep 19:05:41.514 - Client closed connection
[19569] 17 Sep 19:05:41.515 - Client closed connection
[19569] 17 Sep 19:05:42.112 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverA serverA.mydomain.tld 6379
[19569] 17 Sep 19:05:42.112 * +sentinel sentinel serverC.mydomain.tld:26379 serverC.mydomain.tld 26379 @ serverB serverA.mydomain.tld 6379

2 个答案:

答案 0 :(得分：2)

您必须在Sentinel配置中仅指定主服务器（仅指定主服务器），因为Sentinel本身应自动发现从服务器。

由于这两者都被认为是你的哨兵配置中的主人，所以它很难受。

我建议您阅读redis-sentinel文档以获取更多信息及其工作原理

答案 1 :(得分：0)

我会按如下方式修改您的测试程序（添加粗线）：

  1. 启动两个redis-nodes
  2. 启动每个sentinel节点（全部三个）
  3. 停止服务器A（主服务器）
  4. 服务器B成为主服务器
  5. 再次启动服务器A（主服务器）
  6. 在A上，运行slaveof（B）
  7. 等待前哨群集检测A
  8. 停止服务器B（从属）
  9. 再次启动服务器B（从属）
  10. 在B上，运行slaveof（A）

    11. 如果您专门尝试测试堕落案例，请务必忽视我的建议。但是，如果您正在尝试模拟真实的恢复方案，那么粗体线应该告诉哨兵群集了什么。

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