{"id":1172,"date":"2019-01-08T06:39:53","date_gmt":"2019-01-08T06:39:53","guid":{"rendered":"http:\/\/www.ipcpu.com\/?p=1172"},"modified":"2019-03-08T06:47:22","modified_gmt":"2019-03-08T06:47:22","slug":"redis-sentinel","status":"publish","type":"post","link":"https:\/\/c.ipcpu.com\/2019\/01\/redis-sentinel\/","title":{"rendered":"Redis Sentinel(\u54e8\u5175)\u539f\u7406"},"content":{"rendered":"

Redis Sentinel(\u54e8\u5175)\u539f\u7406.md<\/p>\n

\u4e00\u3001Redis Sentinel\u6982\u8ff0<\/h2>\n

Redis-Sentinel\u662fRedis\u5b98\u65b9\u63a8\u8350\u7684\u9ad8\u53ef\u7528\u6027(HA)\u89e3\u51b3\u65b9\u6848\uff0c\u5f53\u7528Redis\u505aMaster-slave\u7684\u9ad8\u53ef\u7528\u65b9\u6848\u65f6\uff0c\u5047\u5982master\u5b95\u673a\u4e86\uff0cRedis\u672c\u8eab(\u5305\u62ec\u5b83\u7684\u5f88\u591a\u5ba2\u6237\u7aef)\u90fd\u6ca1\u6709\u5b9e\u73b0\u81ea\u52a8\u8fdb\u884c\u4e3b\u5907\u5207\u6362\uff0c\u800cRedis-sentinel\u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u72ec\u7acb\u8fd0\u884c\u7684\u8fdb\u7a0b\uff0c\u5b83\u80fd\u76d1\u63a7\u591a\u4e2amaster-slave\u96c6\u7fa4\uff0c\u53d1\u73b0master\u5b95\u673a\u540e\u80fd\u8fdb\u884c\u81ea\u52a8\u5207\u6362\u3002<\/p>\n

\u4e8c\u3001Sentinel\u4e3b\u8981\u529f\u80fd<\/h2>\n

sentinel\u7684\u4e3b\u8981\u529f\u80fd\uff1a<\/p>\n

\n

\u76d1\u63a7(Monitoring): sentinel \u4f1a\u4e0d\u65ad\u5730\u68c0\u67e5Master\u548cSlave\u662f\u5426\u8fd0\u4f5c\u6b63\u5e38\u3002<\/p>\n

\u901a\u77e5(Notification):\u5f53\u88ab\u76d1\u63a7\u7684\u67d0\u4e2aRedis\u5b9e\u4f8b\u51fa\u73b0\u95ee\u9898\u65f6, \u54e8\u5175(sentinel) \u53ef\u4ee5\u901a\u8fc7 API \u5411\u7ba1\u7406\u5458\u6216\u8005\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u53d1\u9001\u901a\u77e5\u3002<\/p>\n

\u81ea\u52a8\u6545\u969c\u8fc1\u79fb(Automatic failover):\u5f53\u4e00\u4e2aMaster\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\u65f6\uff0csentinel)\u4f1a\u5f00\u59cb\u4e00\u6b21\u81ea\u52a8\u6545\u969c\u8fc1\u79fb\u64cd\u4f5c,\u5b83\u4f1a\u5c06\u5931\u6548Master\u7684\u5176\u4e2d\u4e00\u4e2aSlave\u5347\u7ea7\u4e3a\u65b0\u7684Master, \u5e76\u8ba9\u5931\u6548Master\u7684\u5176\u4ed6Slave\u6539\u4e3a\u590d\u5236\u65b0\u7684Master; \u5f53\u5ba2\u6237\u7aef\u8bd5\u56fe\u8fde\u63a5\u5931\u6548\u7684Master\u65f6,\u96c6\u7fa4\u4e5f\u4f1a\u5411\u5ba2\u6237\u7aef\u8fd4\u56de\u65b0Master\u7684\u5730\u5740,\u4f7f\u5f97\u96c6\u7fa4\u53ef\u4ee5\u4f7f\u7528Master\u4ee3\u66ff\u5931\u6548Master\u3002<\/p>\n

\u914d\u7f6e\u4e2d\u5fc3(Configuration provider)\uff1a\u5982\u679c\u6545\u969c\u8f6c\u79fb\u53d1\u751f\u4e86\uff0csentinel\u4f1a\u8fd4\u56de\u65b0\u7684master\u5730\u5740\u3002<\/p>\n<\/blockquote>\n

\u5f88\u663e\u7136\uff0c\u53ea\u4f7f\u7528\u5355\u4e2asentinel\u8fdb\u7a0b\u6765\u76d1\u63a7redis\u96c6\u7fa4\u662f\u4e0d\u53ef\u9760\u7684\uff0c\u5f53sentinel\u8fdb\u7a0b\u5b95\u6389\u540e(sentinel\u672c\u8eab\u4e5f\u6709\u5355\u70b9\u95ee\u9898\uff0csingle-point-of-failure)\u6574\u4e2a\u96c6\u7fa4\u7cfb\u7edf\u5c06\u65e0\u6cd5\u6309\u7167\u9884\u671f\u7684\u65b9\u5f0f\u8fd0\u884c\u3002\u6240\u4ee5\u6709\u5fc5\u8981\u5c06sentinel\u96c6\u7fa4\u3002<\/p>\n

\u5982\u4e0b\u56fe\uff0c\u5c31\u662f\u6700\u5e38\u89c1\u7684Sentinel\u7684\u4f7f\u7528\u65b9\u5f0f\u3002
\n<\/p>\n

\u4e09\u3001Sentinel\u539f\u7406<\/h2>\n

\u5728Sentinel\u54e8\u5175\u7684\u8fd0\u884c\u9636\u6bb5\uff0c\u5176\u4f1a\u5411\u5176\u4ed6\u7684Sentinel\u54e8\u5175\u3001master\u548cslave\u53d1\u9001\u6d88\u606f\u786e\u8ba4\u5176\u662f\u5426\u5b58\u6d3b\uff0c\u5982\u679c\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u5185\u672a\u6536\u5230\u6b63\u5e38\u56de\u5e94\uff0c\u6682\u65f6\u8ba4\u4e3a\u5bf9\u65b9\u6302\u8d77\u4e86\uff08\u88ab\u6807\u8bb0\u4e3a\u4e3b\u89c2\u5b95\u673a\u2013SDOWN\uff09
\n\u5f53\u591a\u4e2aSentinel\u54e8\u5175(\u6570\u91cf\u7531quorum \u53c2\u6570\u8bbe\u5b9a)\u90fd\u62a5\u544a\u540c\u4e00\u4e2amaster\u6ca1\u6709\u54cd\u5e94\u4e86\uff0c\u901a\u8fc7\u6295\u7968\u7b97\u6cd5(Raft\u7b97\u6cd5)\uff0c\u7cfb\u7edf\u5224\u65ad\u5176\u5df2\u6b7b\u4ea1\uff08\u88ab\u6807\u8bb0\u4e3a\u5ba2\u89c2\u5b95\u673a\u2013ODOWN\uff09\u3002<\/p>\n

\u6b64\u65f6Sentinel\u96c6\u7fa4\u4f1a\u9009\u53d6\u9886\u5934\u7684\u54e8\u5175\uff08leader\uff09\u8fdb\u884c\u6545\u969c\u6062\u590d\uff0c\u4ece\u73b0\u6709slave\u8282\u70b9\u4e2d\u9009\u51fa(\u7b97\u6cd5\u540e\u7eed\u6709\u4ecb\u7ecd)\u4e00\u4e2a\u63d0\u5347\u4e3aMaster\uff0c\u5e76\u628a\u5269\u4f59Slave\u90fd\u6307\u5411\u65b0\u7684Master\uff0c\u7ee7\u7eed\u7ef4\u62a4\u4e3b\u4ece\u5173\u7cfb\u3002<\/p>\n

\u56db\u3001Sentinel\u96c6\u7fa4<\/h2>\n

redis\u7684sentinel\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u53ef\u4ee5\u5728\u4e00\u4e2a\u67b6\u6784\u4e0b\u8fd0\u884c\u591a\u4e2asentinel\u8fdb\u7a0b\uff0c\u8fd9\u4e9b\u8fdb\u7a0b\u4e4b\u95f4\u901a\u8fc7\u6d41\u8a00\u534f\u8bae\uff08gossip protocols)\u6765\u63a5\u6536\u5173\u4e8e\u4e3b\u670d\u52a1\u5668\u662f\u5426\u4e0b\u7ebf\u7684\u4fe1\u606f\uff0c \u5e76\u4f7f\u7528\u6295\u7968\u534f\u8bae\uff08agreement protocols\uff09\u6765\u51b3\u5b9a\u662f\u5426\u6267\u884c\u81ea\u52a8\u6545\u969c\u8fc1\u79fb\uff0c \u4ee5\u53ca\u9009\u62e9\u54ea\u4e2a\u4eceslave\u670d\u52a1\u5668\u4f5c\u4e3a\u65b0\u7684\u4e3b\u670d\u52a1\u5668\u3002<\/p>\n

\u90a3\u4e48\uff0cSentinel\u96c6\u7fa4\u7684 \u673a\u5668\u662f\u5982\u4f55\u53d1\u73b0\u96c6\u7fa4\u4e2d\u7684\u5176\u4ed6\u673a\u5668\u5462\uff1f
\n\u4f7f\u7528\u5e7f\u64ad\uff1f\u5f88\u663e\u7136\u4e0d\u5408\u9002\uff0c\u65e2\u7136\u662fredis\u7684\u4ea7\u54c1\uff0c\u81ea\u7136\u8981\u5145\u5206\u8fd0\u7528redis\u529f\u80fd\uff0cSentinel\u96c6\u7fa4\u8282\u70b9\u5229\u7528\u4e86Redis master\u7684\u53d1\u5e03\/\u8ba2\u9605\u673a\u5236\u53bb\u81ea\u52a8\u53d1\u73b0\u5176\u5b83\u8282\u70b9\u3002<\/p>\n

\u6bcf\u4e2aSentinel\u4f7f\u7528\u53d1\u5e03\/\u8ba2\u9605\u7684\u65b9\u5f0f\u6301\u7eed\u5730\u4f20\u64admaster\u7684\u914d\u7f6e\u7248\u672c\u4fe1\u606f\uff0c\u914d\u7f6e\u4f20\u64ad\u7684\u53d1\u5e03\/\u8ba2\u9605\u7ba1\u9053\u662f\uff1asentinel<\/strong>:hello\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8ba2\u9605\u5176\u9891\u9053\u67e5\u770b\u9891\u9053\u4e2d\u7684\u6d88\u606f\uff0c\u5982\u4e0b\uff1a
\n<\/p>\n

snetinel\u7684\u72b6\u6001\u4f1a\u88ab\u6301\u4e45\u5316\u5730\u5199\u5165sentinel\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u3002\u6bcf\u6b21\u5f53\u6536\u5230\u4e00\u4e2a\u65b0\u7684\u914d\u7f6e\u65f6\uff0c\u6216\u8005\u65b0\u521b\u5efa\u4e00\u4e2a\u914d\u7f6e\u65f6\uff0c\u914d\u7f6e\u4f1a\u88ab\u6301\u4e45\u5316\u5230\u786c\u76d8\u4e2d\uff0c\u5e76\u5e26\u4e0a\u914d\u7f6e\u7684\u7248\u672c\u6233\u3002\u8fd9\u610f\u5473\u7740\uff0c\u53ef\u4ee5\u5b89\u5168\u7684\u505c\u6b62\u548c\u91cd\u542fsentinel\u8fdb\u7a0b\u3002<\/p>\n

\u4e94\u3001redis sentinel\u7684\u4e3b\u89c2\u4e0b\u7ebf\u548c\u5ba2\u89c2\u4e0b\u7ebf<\/h2>\n

redis sentinel\u5173\u4e8e\u88ab\u76d1\u63a7\u7684redis\u5b9e\u4f8b\u51fa\u73b0\u4e0d\u54cd\u5e94\u7684\u5224\u65ad\uff0c\u5185\u90e8\u6709\u4e24\u79cd\u4e0d\u540c\u7684\u6982\u5ff5\uff1a\u4e3b\u89c2\u4e0b\u7ebf\u548c\u5ba2\u89c2\u4e0b\u7ebf<\/p>\n

\n

\u4e3b\u89c2\u4e0b\u7ebf(SDOWN)\uff1a\u5f53\u53ea\u6709\u5355\u4e2asentinel\u5b9e\u4f8b\u5bf9redis\u5b9e\u4f8b\u505a\u51fa\u65e0\u54cd\u5e94\u7684\u5224\u65ad\uff0c\u6b64\u65f6\u8fdb\u5165\u4e3b\u89c2\u5224\u65ad\uff0c\u4e0d\u4f1a\u89e6\u53d1\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\u7b49\u64cd\u4f5c\u3002
\n \u4e00\u4e2a\u670d\u52a1\u5668\u5fc5\u987b\u5728 master-down-after-milliseconds \u6beb\u79d2\u5185\uff0c \u4e00\u76f4\u8fd4\u56de\u65e0\u6548\u56de\u590d\u624d\u4f1a\u88ab Sentinel \u6807\u8bb0\u4e3a\u4e3b\u89c2\u4e0b\u7ebf\u3002<\/p>\n

\u5ba2\u89c2\u4e0b\u7ebf(ODOWN) \uff1a\u591a\u4e2a Sentinel \u5b9e\u4f8b\u5728\u5bf9\u540c\u4e00\u4e2a\u670d\u52a1\u5668\u505a\u51fa SDOWN \u5224\u65ad\uff0c \u5e76\u4e14\u901a\u8fc7 SENTINEL is-master-down-by-addr \u547d\u4ee4\u4e92\u76f8\u4ea4\u6d41\u4e4b\u540e\uff0c \u5f97\u51fa\u7684\u670d\u52a1\u5668\u4e0b\u7ebf\u5224\u65ad\u3002 \uff08\u4e00\u4e2a Sentinel \u53ef\u4ee5\u901a\u8fc7\u5411\u53e6\u4e00\u4e2a Sentinel \u53d1\u9001 SENTINEL is-master-down-by-addr \u547d\u4ee4\u6765\u8be2\u95ee\u5bf9\u65b9\u662f\u5426\u8ba4\u4e3a\u7ed9\u5b9a\u7684\u670d\u52a1\u5668\u5df2\u4e0b\u7ebf\uff09<\/p>\n<\/blockquote>\n

\u4ece\u4e3b\u89c2\u4e0b\u7ebf\u72b6\u6001\u5207\u6362\u5230\u5ba2\u89c2\u4e0b\u7ebf\u72b6\u6001\u5e76\u6ca1\u6709\u4f7f\u7528\u4e25\u683c\u7684\u6cd5\u5b9a\u4eba\u6570\u7b97\u6cd5\uff08strong quorum algorithm\uff09\uff0c \u800c\u662f\u4f7f\u7528\u4e86\u6d41\u8a00\u534f\u8bae\uff1a \u5982\u679c Sentinel \u5728\u7ed9\u5b9a\u7684\u65f6\u95f4\u8303\u56f4\u5185\uff0c \u4ece\u5176\u4ed6 Sentinel \u90a3\u91cc\u63a5\u6536\u5230\u4e86\u8db3\u591f\u6570\u91cf\u7684\u4e3b\u670d\u52a1\u5668\u4e0b\u7ebf\u62a5\u544a\uff0c \u90a3\u4e48 Sentinel \u5c31\u4f1a\u5c06\u4e3b\u670d\u52a1\u5668\u7684\u72b6\u6001\u4ece\u4e3b\u89c2\u4e0b\u7ebf\u6539\u53d8\u4e3a\u5ba2\u89c2\u4e0b\u7ebf\u3002 \u5982\u679c\u4e4b\u540e\u5176\u4ed6 Sentinel \u4e0d\u518d\u62a5\u544a\u4e3b\u670d\u52a1\u5668\u5df2\u4e0b\u7ebf\uff0c \u90a3\u4e48\u5ba2\u89c2\u4e0b\u7ebf\u72b6\u6001\u5c31\u4f1a\u88ab\u79fb\u9664\u3002<\/p>\n

\u5ba2\u89c2\u4e0b\u7ebf\u6761\u4ef6\u53ea\u9002\u7528\u4e8e\u4e3b\u670d\u52a1\u5668\uff1a \u5bf9\u4e8e\u4efb\u4f55\u5176\u4ed6\u7c7b\u578b\u7684 Redis \u5b9e\u4f8b\uff0c Sentinel \u5728\u5c06\u5b83\u4eec\u5224\u65ad\u4e3a\u4e0b\u7ebf\u524d\u4e0d\u9700\u8981\u8fdb\u884c\u534f\u5546\uff0c \u6240\u4ee5\u4ece\u670d\u52a1\u5668Slave\u6216\u8005\u5176\u4ed6 Sentinel \u6c38\u8fdc\u4e0d\u4f1a\u8fbe\u5230\u5ba2\u89c2\u4e0b\u7ebf\u6761\u4ef6\u3002<\/p>\n

\u516d\u3001\u9886\u5934\u54e8\u5175\u9009\u4e3e<\/h2>\n

\u3000\u3000\u5728\u539f\u7406\u4e2d\u63d0\u53ca\u5230\u4e86\uff0c\u5f53sentinel\u53d1\u73b0\u4e3b\u5e93\u5ba2\u89c2\u4e0b\u7ebf\u65f6\u5019\u4f1a\u8fdb\u884c\u9886\u5934\u54e8\u5175\u9009\u4e3e\u8fdb\u884c\u6545\u969c\u6062\u590d\uff0c\u5176\u9009\u4e3e\u7b97\u6cd5\u91c7\u7528Raft\u7b97\u6cd5\uff0c\u8fd9\u4e5f\u4e3a\u4ec0\u4e48\u8bf4\u5176\u8bbe\u8ba1\u601d\u60f3\u7c7b\u4f3c\u4e0ezookpeer\uff0c\u9009\u4e3e\u8fc7\u7a0b\u5927\u4f53\u5982\u4e0b\uff1a<\/p>\n

6.1 \u53d1\u73b0\u4e3b\u5e93\u5ba2\u89c2\u4e0b\u7ebf\u7684\u54e8\u5175\u8282\u70b9\uff08\u8fd9\u91cc\u79f0\u4e3aA\uff09\u5411\u6bcf\u4e2a\u54e8\u5175\u8282\u70b9\u53d1\u9001\u547d\u4ee4\u8981\u6c42\u5bf9\u65b9\u9009\u4e3e\u81ea\u5df1\u4e3a\u9886\u5934\u54e8\u5175\uff08leader\uff09\uff1b
\n6.2 \u5982\u679c\u76ee\u6807\u54e8\u5175\u6ca1\u6709\u9009\u4e3e\u8fc7\u5176\u4ed6\u4eba\uff0c\u5219\u540c\u610f\u5c06A\u9009\u4e3e\u4e3a\u9886\u5934\u54e8\u5175\uff1b
\n6.3 \u5982\u679cA\u53d1\u73b0\u6709\u8d85\u8fc7\u534a\u6570\u4e14\u8d85\u8fc7quorum\u53c2\u6570\u503c\u7684\u54e8\u5175\u8282\u70b9\u540c\u610f\u9009\u81ea\u5df1\u6210\u4e3a\u9886\u5934\u54e8\u5175\uff0c\u5219A\u54e8\u5175\u6210\u529f\u9009\u4e3e\u4e3a\u9886\u5934\u54e8\u5175\u3002
\n6.4 \u5f53\u6709\u591a\u4e2a\u54e8\u5175\u8282\u70b9\u540c\u65f6\u53c2\u4e0e\u9886\u5934\u54e8\u5175\u9009\u4e3e\u65f6\uff0c\u51fa\u73b0\u6ca1\u6709\u4efb\u4f55\u8282\u70b9\u5f53\u9009\u53ef\u80fd\uff0c\u6b64\u65f6\u6bcf\u4e2a\u53c2\u9009\u8282\u70b9\u7b49\u5f85\u4e00\u4e2a\u968f\u673a\u65f6\u95f4\u8fdb\u884c\u4e0b\u4e00\u8f6e\u9009\u4e3e\uff0c\u76f4\u5230\u9009\u51fa\u9886\u5934\u54e8\u5175\u3002<\/p>\n

\u4e03\u3001\u6545\u969c\u6062\u590d\u65f6\u4eceSlave\u4e2d\u95f4\u9009\u51faMaster\u7684\u7b97\u6cd5<\/h2>\n

7.1 \u6309\u7167slave\u4f18\u5148\u7ea7\u8fdb\u884c\u6392\u5e8f\uff0cslave-priority\u8d8a\u4f4e\uff0c\u4f18\u5148\u7ea7\u5c31\u8d8a\u9ad8\uff1b
\n7.2 \u5982\u679cslave priority\u76f8\u540c\uff0c\u90a3\u4e48\u6bd4\u8f83\u590d\u5236\u504f\u79fb\u91cf\uff0coffset\u8d8a\u9760\u540e\uff08\u8d8a\u5927\uff09\u5219\u8868\u660e\u548c\u65e7\u7684\u4e3b\u5e93\u6570\u636e\u540c\u6b65\u8d8a\u63a5\u8fd1\uff0c\u4f18\u5148\u7ea7\u5c31\u8d8a\u9ad8 \uff1b
\n7.3 \u5982\u679c\u4e0a\u9762\u4e24\u4e2a\u6761\u4ef6\u90fd\u76f8\u540c\uff0c\u90a3\u4e48\u9009\u62e9\u4e00\u4e2arun id\u6700\u5c0f\u7684\u4ece\u5e93\uff1b<\/p>\n

\u516b\u3001Sentinel\u96c6\u7fa4\u90e8\u7f72<\/h2>\n

Sentinel\u90e8\u7f72\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u8981\u914d\u7f6e\u4e00\u4e0b\/etc\/redis-sentinel.conf\u914d\u7f6e\u6587\u4ef6\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\u4e0b<\/p>\n

\n
#\u5de5\u4f5c\u7aef\u53e3\r\nport 26379\r\n#\u5de5\u4f5c\u76ee\u5f55\r\ndir \"\/var\/lib\/redis\/sentinel\"\r\n#sentinel id \uff0c\u5efa\u8bae\u6ce8\u91ca\u6389\uff0c\u4f1a\u81ea\u52a8\u751f\u6210\r\n#sentinel myid 827f0104ad153f34db5a29b8cbb51ef21a31d6d5\r\n#\u914d\u7f6e\u8981\u76d1\u63a7\u7684master\u540d\u5b57\u548c\u5730\u5740\uff0c\u6700\u540e\u4e00\u4e2a2\u4ee3\u8868\u5f53sentinel\u96c6\u7fa4\u4e2d\u67092\u4e2asentinel\u8ba4\u4e3amaster\u6545\u969c\u65f6\u5019\u624d\u5224\u5b9amaster\u771f\u6b63\u4e0d\u53ef\u7528\u3002\u5b98\u65b9\u628a\u8be5\u53c2\u6570\u79f0\u4e3aquorum\uff0c\u5728\u540e\u7eed\u9009\u4e3e\u9886\u5934\u54e8\u5175\u65f6\u5019\u4f1a\u7528\u5230\r\nsentinel monitor mymaster 10.130.2.155 6379 2\r\n#\u914d\u7f6emaster\u5bc6\u7801\r\nsentinel auth-pass mymaster Password\r\n#\u65e5\u5fd7\r\nlogfile \"\/var\/log\/redis\/sentinel.log\"<\/code><\/pre>\n<\/div>\n
\u914d\u7f6e\u5b8c\u6210\u540e\uff0c\u4f7f\u7528systemctl start redis-sentinel\u542f\u52a8\u5373\u53ef\u3002<\/p>\n
Sentinel\u53ef\u4ee5\u8c03\u6574\u7684\u76f8\u5173\u53c2\u6570<\/p>\n
\n
#\u4e3b\u89c2SDOWN\u65f6\u95f4\uff0c\u5355\u4f4d\u6beb\u79d2\uff0c\u9ed8\u8ba430\u79d2\u3002\r\nsentinel down-after-milliseconds mymaster 30000\r\n\r\n#\u5728\u53d1\u751ffailover\u4e3b\u5907\u5207\u6362\u65f6\u5019\uff0c\u6700\u591a\u5141\u8bb8\u591a\u5c11\u4e2aslave\u540c\u65f6\u540c\u6b65\u65b0\u7684master\u3002\u8fd9\u4e2a\u6570\u5b57\u8d8a\u5c0f\uff0c\u5b8c\u6210failover\u6240\u9700\u7684\u65f6\u95f4\u5c31\u8d8a\u957f\uff0c\u4f46\u662f\u5982\u679c\u8fd9\u4e2a\u6570\u5b57\u8d8a\u5927\uff0c\u5c31\u610f\u5473\u7740\u8d8a\u591a\u7684slave\u56e0\u4e3areplication\u800c\u4e0d\u53ef\u7528\u3002\u53ef\u4ee5\u901a\u8fc7\u5c06\u8fd9\u4e2a\u503c\u8bbe\u4e3a 1 \u6765\u4fdd\u8bc1\u6bcf\u6b21\u53ea\u6709\u4e00\u4e2aslave\u5904\u4e8e\u4e0d\u80fd\u5904\u7406\u547d\u4ee4\u8bf7\u6c42\u7684\u72b6\u6001\u3002\r\nsentinel parallel-syncs mymaster 1\r\n\r\n\r\n#failover-time\u8d85\u65f6\u65f6\u95f4\uff0c\u5f53failover\u5f00\u59cb\u540e\uff0c\u5728\u6b64\u65f6\u95f4\u5185\u4ecd\u7136\u6ca1\u6709\u89e6\u53d1\u4efb\u4f55failover\u64cd\u4f5c\uff0c\u5f53\u524dsentinel\u5c06\u4f1a\u8ba4\u4e3a\u6b64\u6b21failover\u5931\u8d25\uff0c\u5355\u4f4d\u6beb\u79d2\u3002\u9ed8\u8ba43\u5206\u949f\u3002\r\nsentinel failover-timeout mymaster 180000<\/code><\/pre>\n<\/div>\n
\u53c2\u8003\u8d44\u6599<\/h2>\n
https:\/\/minichou.github.io\/2016\/03\/25\/Redis%20Sentinel%E5%8E%9F%E7%90%86\/<\/a> 
\nhttp:\/\/weizijun.cn\/2015\/04\/30\/Raft%E5%8D%8F%E8%AE%AE%E5%AE%9E%E6%88%98%E4%B9%8BRedis%20Sentinel%E7%9A%84%E9%80%89%E4%B8%BELeader%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90\/<\/a> 
\nhttp:\/\/blog.fnil.net\/blog\/255ccfae971d6d30b0921120d327490b\/<\/a> 
\nhttp:\/\/mdba.cn\/2015\/05\/04\/redis-sentinel%E5%9F%BA%E6%9C%AC%E5%91%BD%E4%BB%A4%E4%B8%8E%E5%8F%82%E6%95%B0\/<\/a> 
\nhttps:\/\/www.cnblogs.com\/ivictor\/p\/9755065.html<\/a> 
\nhttps:\/\/www.cnblogs.com\/starlion\/p\/9091337.html<\/a> 
\nhttps:\/\/throwsnew.com\/2017\/11\/21\/%E5%9B%BE%E8%A7%A3redis%20sentinel\/<\/a> 
\nhttps:\/\/www.cnblogs.com\/wdliu\/p\/9555620.html<\/a><\/p>\n
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<\/wiz_tmp_tag><\/p>\n
\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aIPCPU-\u7f51\u7edc\u4e4b\u8def<\/a> » Redis Sentinel(\u54e8\u5175)\u539f\u7406<\/a><\/p>","protected":false},"excerpt":{"rendered":"
Redis Sentinel(\u54e8\u5175)\u539f\u7406.md \u4e00\u3001Redis Sentinel\u6982\u8ff0 Redis-Sentinel\u662fRedis\u5b98\u65b9\u63a8\u8350\u7684\u9ad8\u53ef\u7528\u6027(HA)\u89e3\u51b3\u65b9\u6848\uff0c\u5f53\u7528Redis\u505aMaster-slave\u7684\u9ad8\u53ef\u7528\u65b9\u6848\u65f6\uff0c\u5047\u5982master\u5b95\u673a\u4e86\uff0cRedis\u672c\u8eab(\u5305\u62ec\u5b83\u7684\u5f88\u591a\u5ba2\u6237\u7aef)\u90fd\u6ca1\u6709\u5b9e\u73b0\u81ea\u52a8\u8fdb\u884c\u4e3b\u5907\u5207\u6362\uff0c\u800cRedis-sentinel\u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u72ec\u7acb\u8fd0\u884c\u7684\u8fdb\u7a0b\uff0c\u5b83\u80fd\u76d1\u63a7\u591a\u4e2amaster-slave\u96c6\u7fa4\uff0c\u53d1\u73b0master\u5b95\u673a\u540e\u80fd\u8fdb\u884c\u81ea\u52a8\u5207\u6362\u3002 \u4e8c\u3001Sentinel\u4e3b\u8981\u529f\u80fd sentinel\u7684\u4e3b\u8981\u529f\u80fd\uff1a \u76d1\u63a7(Monitoring): sentinel \u4f1a\u4e0d\u65ad\u5730\u68c0\u67e5Master\u548cSlave\u662f\u5426\u8fd0\u4f5c\u6b63\u5e38\u3002 \u901a\u77e5(Notification):\u5f53\u88ab\u76d1\u63a7\u7684\u67d0\u4e2aRedis\u5b9e\u4f8b\u51fa\u73b0\u95ee\u9898\u65f6, \u54e8\u5175(sentinel) \u53ef\u4ee5\u901a\u8fc7 API \u5411\u7ba1\u7406\u5458\u6216\u8005\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u53d1\u9001\u901a\u77e5\u3002 \u81ea\u52a8\u6545\u969c\u8fc1\u79fb(Automatic failover):\u5f53\u4e00\u4e2aMaster\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\u65f6\uff0csentinel)\u4f1a\u5f00\u59cb\u4e00\u6b21\u81ea\u52a8\u6545\u969c\u8fc1\u79fb\u64cd\u4f5c,\u5b83\u4f1a\u5c06\u5931\u6548Master\u7684\u5176\u4e2d\u4e00\u4e2aSlave\u5347\u7ea7\u4e3a\u65b0\u7684Master, \u5e76\u8ba9\u5931\u6548Master\u7684\u5176\u4ed6Slave\u6539\u4e3a\u590d\u5236\u65b0\u7684Master; \u5f53\u5ba2\u6237\u7aef\u8bd5\u56fe\u8fde\u63a5\u5931\u6548\u7684Master\u65f6,\u96c6\u7fa4\u4e5f\u4f1a\u5411\u5ba2\u6237\u7aef\u8fd4\u56de\u65b0Master\u7684\u5730\u5740,\u4f7f\u5f97\u96c6\u7fa4\u53ef\u4ee5\u4f7f\u7528Master\u4ee3\u66ff\u5931\u6548Master\u3002 \u914d\u7f6e\u4e2d\u5fc3(Configuration provider)\uff1a\u5982\u679c\u6545\u969c\u8f6c\u79fb\u53d1\u751f\u4e86\uff0csentinel\u4f1a\u8fd4\u56de\u65b0\u7684master\u5730\u5740\u3002 \u5f88\u663e\u7136\uff0c\u53ea\u4f7f\u7528\u5355\u4e2asentinel\u8fdb\u7a0b\u6765\u76d1\u63a7redis\u96c6\u7fa4\u662f\u4e0d\u53ef\u9760\u7684\uff0c\u5f53sentinel\u8fdb\u7a0b\u5b95\u6389\u540e(sentinel\u672c\u8eab\u4e5f\u6709\u5355\u70b9\u95ee\u9898\uff0csingle-point-of-failure)\u6574\u4e2a\u96c6\u7fa4\u7cfb\u7edf\u5c06\u65e0\u6cd5\u6309\u7167\u9884\u671f\u7684\u65b9\u5f0f\u8fd0\u884c\u3002\u6240\u4ee5\u6709\u5fc5\u8981\u5c06sentinel\u96c6\u7fa4\u3002 \u5982\u4e0b\u56fe\uff0c\u5c31\u662f\u6700\u5e38\u89c1\u7684Sentinel\u7684\u4f7f\u7528\u65b9\u5f0f\u3002 \u4e09\u3001Sentinel\u539f\u7406 \u5728Sentinel\u54e8\u5175\u7684\u8fd0\u884c\u9636\u6bb5\uff0c\u5176\u4f1a\u5411\u5176\u4ed6\u7684Sentinel\u54e8\u5175\u3001master\u548cslave\u53d1\u9001\u6d88\u606f\u786e\u8ba4\u5176\u662f\u5426\u5b58\u6d3b\uff0c\u5982\u679c\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u5185\u672a\u6536\u5230\u6b63\u5e38\u56de\u5e94\uff0c\u6682\u65f6\u8ba4\u4e3a\u5bf9\u65b9\u6302\u8d77\u4e86\uff08\u88ab\u6807\u8bb0\u4e3a\u4e3b\u89c2\u5b95\u673a\u2013SDOWN\uff09 \u5f53\u591a\u4e2aSentinel\u54e8\u5175(\u6570\u91cf\u7531quorum \u53c2\u6570\u8bbe\u5b9a)\u90fd\u62a5\u544a\u540c\u4e00\u4e2amaster\u6ca1\u6709\u54cd\u5e94\u4e86\uff0c\u901a\u8fc7\u6295\u7968\u7b97\u6cd5(Raft\u7b97\u6cd5)\uff0c\u7cfb\u7edf\u5224\u65ad\u5176\u5df2\u6b7b\u4ea1\uff08\u88ab\u6807\u8bb0\u4e3a\u5ba2\u89c2\u5b95\u673a\u2013ODOWN\uff09\u3002 \u6b64\u65f6Sentinel\u96c6\u7fa4\u4f1a\u9009\u53d6\u9886\u5934\u7684\u54e8\u5175\uff08leader\uff09\u8fdb\u884c\u6545\u969c\u6062\u590d\uff0c\u4ece\u73b0\u6709slave\u8282\u70b9\u4e2d\u9009\u51fa(\u7b97\u6cd5\u540e\u7eed\u6709\u4ecb\u7ecd)\u4e00\u4e2a\u63d0\u5347\u4e3aMaster\uff0c\u5e76\u628a\u5269\u4f59Slave\u90fd\u6307\u5411\u65b0\u7684Master\uff0c\u7ee7\u7eed\u7ef4\u62a4\u4e3b\u4ece\u5173\u7cfb\u3002 \u56db\u3001Sentinel\u96c6\u7fa4 redis\u7684sentinel\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u53ef\u4ee5\u5728\u4e00\u4e2a\u67b6\u6784\u4e0b\u8fd0\u884c\u591a\u4e2asentinel\u8fdb\u7a0b\uff0c\u8fd9\u4e9b\u8fdb\u7a0b\u4e4b\u95f4\u901a\u8fc7\u6d41\u8a00\u534f\u8bae\uff08gossip protocols)\u6765\u63a5\u6536\u5173\u4e8e\u4e3b\u670d\u52a1\u5668\u662f\u5426\u4e0b\u7ebf\u7684\u4fe1\u606f\uff0c \u5e76\u4f7f\u7528\u6295\u7968\u534f\u8bae\uff08agreement protocols\uff09\u6765\u51b3\u5b9a\u662f\u5426\u6267\u884c\u81ea\u52a8\u6545\u969c\u8fc1\u79fb\uff0c \u4ee5\u53ca\u9009\u62e9\u54ea\u4e2a\u4eceslave\u670d\u52a1\u5668\u4f5c\u4e3a\u65b0\u7684\u4e3b\u670d\u52a1\u5668\u3002 \u90a3\u4e48\uff0cSentinel\u96c6\u7fa4\u7684 \u673a\u5668\u662f\u5982\u4f55\u53d1\u73b0\u96c6\u7fa4\u4e2d\u7684\u5176\u4ed6\u673a\u5668\u5462\uff1f \u4f7f\u7528\u5e7f\u64ad\uff1f\u5f88\u663e\u7136\u4e0d\u5408\u9002\uff0c\u65e2\u7136\u662fredis\u7684\u4ea7\u54c1\uff0c\u81ea\u7136\u8981\u5145\u5206\u8fd0\u7528redis\u529f\u80fd\uff0cSentinel\u96c6\u7fa4\u8282\u70b9\u5229\u7528\u4e86Redis master\u7684\u53d1\u5e03\/\u8ba2\u9605\u673a\u5236\u53bb\u81ea\u52a8\u53d1\u73b0\u5176\u5b83\u8282\u70b9\u3002 \u6bcf\u4e2aSentinel\u4f7f\u7528\u53d1\u5e03\/\u8ba2\u9605\u7684\u65b9\u5f0f\u6301\u7eed\u5730\u4f20\u64admaster\u7684\u914d\u7f6e\u7248\u672c\u4fe1\u606f\uff0c\u914d\u7f6e\u4f20\u64ad\u7684\u53d1\u5e03\/\u8ba2\u9605\u7ba1\u9053\u662f\uff1asentinel:hello\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8ba2\u9605\u5176\u9891\u9053\u67e5\u770b\u9891\u9053\u4e2d\u7684\u6d88\u606f\uff0c\u5982\u4e0b\uff1a snetinel\u7684\u72b6\u6001\u4f1a\u88ab\u6301\u4e45\u5316\u5730\u5199\u5165sentinel\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u3002\u6bcf\u6b21\u5f53\u6536\u5230\u4e00\u4e2a\u65b0\u7684\u914d\u7f6e\u65f6\uff0c\u6216\u8005\u65b0\u521b\u5efa\u4e00\u4e2a\u914d\u7f6e\u65f6\uff0c\u914d\u7f6e\u4f1a\u88ab\u6301\u4e45\u5316\u5230\u786c\u76d8\u4e2d\uff0c\u5e76\u5e26\u4e0a\u914d\u7f6e\u7684\u7248\u672c\u6233\u3002\u8fd9\u610f\u5473\u7740\uff0c\u53ef\u4ee5\u5b89\u5168\u7684\u505c\u6b62\u548c\u91cd\u542fsentinel\u8fdb\u7a0b\u3002 \u4e94\u3001redis sentinel\u7684\u4e3b\u89c2\u4e0b\u7ebf\u548c\u5ba2\u89c2\u4e0b\u7ebf redis sentinel\u5173\u4e8e\u88ab\u76d1\u63a7\u7684redis\u5b9e\u4f8b\u51fa\u73b0\u4e0d\u54cd\u5e94\u7684\u5224\u65ad\uff0c\u5185\u90e8\u6709\u4e24\u79cd\u4e0d\u540c\u7684\u6982\u5ff5\uff1a\u4e3b\u89c2\u4e0b\u7ebf\u548c\u5ba2\u89c2\u4e0b\u7ebf \u4e3b\u89c2\u4e0b\u7ebf(SDOWN)\uff1a\u5f53\u53ea\u6709\u5355\u4e2asentinel\u5b9e\u4f8b\u5bf9redis\u5b9e\u4f8b\u505a\u51fa\u65e0\u54cd\u5e94\u7684\u5224\u65ad\uff0c\u6b64\u65f6\u8fdb\u5165\u4e3b\u89c2\u5224\u65ad\uff0c\u4e0d\u4f1a\u89e6\u53d1\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\u7b49\u64cd\u4f5c\u3002 \u4e00\u4e2a\u670d\u52a1\u5668\u5fc5\u987b\u5728 master-down-after-milliseconds \u6beb\u79d2\u5185\uff0c \u4e00\u76f4\u8fd4\u56de\u65e0\u6548\u56de\u590d\u624d\u4f1a\u88ab Sentinel \u6807\u8bb0\u4e3a\u4e3b\u89c2\u4e0b\u7ebf\u3002 \u5ba2\u89c2\u4e0b\u7ebf(ODOWN) \uff1a\u591a\u4e2a Sentinel \u5b9e\u4f8b\u5728\u5bf9\u540c\u4e00\u4e2a\u670d\u52a1\u5668\u505a\u51fa 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