Shulou(Shulou.com)06/01 Report--

一、删除副本集成员

spock:PRIMARY> rs.config() { "_id" : "spock", "version" : 1, "members" : [ { "_id" : 0, "host" : "192.168.1.112:27017" }, { "_id" : 1, "host" : "192.168.1.113:27017" } ] } spock:PRIMARY> rs.remove("192.168.1.113:27017") { "errmsg" : "exception: can't find self in new replset config", "code" : 13433, "ok" : 0 } spock:PRIMARY> rs.remove("192.168.1.112:27017") 2015-02-02T21:59:13.303+0800 DBClientCursor::init call() failed 2015-02-02T21:59:13.304+0800 Error: error doing query: failed at src/mongo/shell/query.js:81 2015-02-02T21:59:13.305+0800 trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed 2015-02-02T21:59:13.308+0800 reconnect 127.0.0.1:27017 (127.0.0.1) ok spock:PRIMARY> rs.config() { "_id" : "spock", "version" : 2, "members" : [ { "_id" : 1, "host" : "192.168.1.113:27017" } ] }

二、添加副本集成员

spock:PRIMARY> rs.add("192.168.1.112:27017") { "ok" : 1 } spock:PRIMARY> rs.config() { "_id" : "spock", "version" : 3, "members" : [ { "_id" : 1, "host" : "192.168.1.113:27017" }, { "_id" : 2, "host" : "192.168.1.112:27017" } ] }

从上述过程来看，配置文档中version字段都会自增，它的初始值为1;

三、或者通过rs.reconfig()函数修改副本集

例如，将host用主机名来替代ip地址

[root@localhost ~]# ping host113 PING host113 (192.168.1.113) 56(84) bytes of data. 64 bytes from host113 (192.168.1.113): icmp_seq=1 ttl=64 time=0.060 ms 64 bytes from host113 (192.168.1.113): icmp_seq=2 ttl=64 time=0.030 ms 64 bytes from host113 (192.168.1.113): icmp_seq=3 ttl=64 time=0.026 ms 64 bytes from host113 (192.168.1.113): icmp_seq=4 ttl=64 time=1.04 ms --- host113 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = 0.026/0.289/1.041/0.434 ms [root@localhost ~]# mongo MongoDB shell version: 2.6.7 connecting to: test spock:PRIMARY> rs.config() { "_id" : "spock", "version" : 3, "members" : [ { "_id" : 1, "host" : "192.168.1.113:27017"}, { "_id" : 2, "host" : "192.168.1.112:27017"} ] } spock:PRIMARY> var config=rs.config() spock:PRIMARY> config.members[0].host="host113:27017" host113:27017 spock:PRIMARY> rs.reconfig(config) 2015-02-02T22:21:22.793+0800 DBClientCursor::init call() failed 2015-02-02T22:21:22.795+0800 trying reconnect to 127.0.0.1:27017 (127.0.0.1) faile2015-02-02T22:21:22.797+0800 reconnect 127.0.0.1:27017 (127.0.0.1) ok reconnected to server after rs command (which is normal)spock:PRIMARY> rs.config() { "_id" : "spock", "version" : 4, "members" : [ { "_id" : 1,"host" : "host113:27017"}, { "_id" : 2, "host" : "192.168.1.112:27017"} ] } spock:PRIMARY>

对于复杂的副本集配置，rs.reconfig函数修改比rs.add和rs.remove更有用;

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