搭建高可用mongodb集群（二）――副本 - 数据库编程

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搭建高可用mongodb集群（二）――副本(三)

2014-11-24 07:50:36 来源: 作者: 【大中小】浏览:12次

data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongo 192.168.1.136:27017

#使用test 数据库。

repset:SECONDARY> use test;

repset:SECONDARY> show tables;

Sun Dec 29 21:50:48.590 error: { "$err" : "not master and slaveOk=false", "code" : 13435 } at src/mongo/shell/query.js:128

#mongodb默认是从主节点读写数据的，副本节点上不允许读，需要设置副本节点可以读。

repset:SECONDARY> db.getMongo().setSlaveOk();

#可以看到数据已经复制到了副本集。

repset:SECONDARY> db.testdb.find();

{ "_id" : ObjectId("52c028460c7505626a93944f"), "test1" : "testval1" }

7、测试副本集故障转移功能

先停掉主节点mongodb 138，查看136、137的日志可以看到经过一系列的投票选择操作，137 当选主节点，136从137同步数据过来。

1 2 3 4 5 6 7 8 9 10 11 12 13 14	Sun Dec 29 22:03:05.351 [rsBackgroundSync] replSet sync source problem: 10278 dbclient error communicating with server: 192.168.1.138:27017 Sun Dec 29 22:03:05.354 [rsBackgroundSync] replSet syncing to: 192.168.1.138:27017 Sun Dec 29 22:03:05.356 [rsBackgroundSync] repl: couldn't connect to server 192.168.1.138:27017 Sun Dec 29 22:03:05.356 [rsBackgroundSync] replSet not trying to sync from 192.168.1.138:27017, it is vetoed for 10 more seconds Sun Dec 29 22:03:05.499 [rsHealthPoll] DBClientCursor::init call() failed Sun Dec 29 22:03:05.499 [rsHealthPoll] replset info 192.168.1.138:27017 heartbeat failed, retrying Sun Dec 29 22:03:05.501 [rsHealthPoll] replSet info 192.168.1.138:27017 is down (or slow to respond): Sun Dec 29 22:03:05.501 [rsHealthPoll] replSet member 192.168.1.138:27017 is now in state DOWN Sun Dec 29 22:03:05.511 [rsMgr] not electing self, 192.168.1.137:27017 would veto with '192.168.1.136:27017 is trying to elect itself but 192.168.1.138:27017 is already primary and more up-to-date' Sun Dec 29 22:03:07.330 [conn393] replSet info voting yea for 192.168.1.137:27017 (1) Sun Dec 29 22:03:07.503 [rsHealthPoll] replset info 192.168.1.138:27017 heartbeat failed, retrying Sun Dec 29 22:03:08.462 [rsHealthPoll] replSet member 192.168.1.137:27017 is now in state PRIMARY Sun Dec 29 22:03:09.359 [rsBackgroundSync] replSet syncing to: 192.168.1.137:27017 Sun Dec 29 22:03:09.507 [rsHealthPoll] replset info 192.168.1.138:27017 heartbeat failed, retrying

查看整个集群的状态，可以看到138为状态不可达。

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52	/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongo 192.168.1.136:27017 repset:SECONDARY> rs.status(); #输出 { "set" : "repset", "date" : ISODate("2013-12-29T14:28:35Z"), "myState" : 2, "syncingTo" : "192.168.1.137:27017", "members" : [ { "_id" : 0, "name" : "192.168.1.136:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 9072, "optime" : Timestamp(1388324934, 1), "optimeDate" : ISODate("2013-12-29T13:48:54Z"), "self" : true }, { "_id" : 1, "name" : "192.168.1.137:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 7329, "optime" : Timestamp(1388324934, 1), "optimeDate" : ISODate("2013-12-29T13:48:54Z"), "lastHeartbeat" : ISODate("2013-12-29T14:28:34Z"), "lastHeartbeatRecv" : ISODate("2013-12-29T14:28:34Z"), "pingMs" : 1, "syncingTo" : "192.168.1.138:27017" }, { "_id" : 2, "name" : "192.168.1.138:27017", "health" : 0, "state" : 8, "stateStr" : "(not reachable/healthy)", "uptime" : 0, "optime" : Timestamp(1388324934, 1), "optimeDate" : ISODate("2013-12-29T13:48:54Z"), "lastHeartbeat" : ISODate("2013-12-29T14:28:35Z"), "lastHeartbeatRecv" : ISODate("2013-12-29T14:28:23Z"), "pingMs" : 0

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