mongo副本集常用命令

mongo查看状态

rs.status()

mongo启动程序

mongod --port 27017 --dbpath /srv/mongodb/rs0-0 --replSet rs0 --smallfiles --oplogSize 128

初始化副本集

rs.initiate()

初始化副本集配置

rsconf = {

           _id: "rs0",

           members: [

                      {

                       _id: 0,

                       host: "<hostname>:27017"

                      }

                    ]

         }

rs.initiate( rsconf )

验证副本集配置

rs.conf()

{

   "_id" : "rs0",

   "version" : 1,

   "members" : [

      {

         "_id" : 1,

         "host" : "mongodb0.example.net:27017"

      }

   ]

}

增加副本集成员

rs.add("mongodb1.example.net")

rs.add("mongodb2.example.net")

增加副本集成员，并且设置成优先级0

rs.add({_id: 1, host: "mongodb3.example.net:27017", priority: 0, hidden: true})

查看副本集状态

rs.status()

配置成员优先级0

cfg = rs.conf()

cfg.members[2].priority = 0

rs.reconfig(cfg)

增加副本集arbiter

rs.addArb("mongodb4.example.net")

副本集删除成员

rs.remove("mongod3.example.net:27017")

rs.remove("mongod3.example.net")

change the hostname to mongo2.example.net for the replica set member configured at members[0], issue the following sequence of commands:

cfg = rs.conf()

cfg.members[0].host = "mongo2.example.net"

rs.reconfig(cfg)

改变成员变量的优先级

cfg = rs.conf()

cfg.members[0].priority = 3

cfg.members[1].priority = 1

cfg.members[2].priority = 2

rs.reconfig(cfg)

Configure a Hidden Replica Set Member

cfg = rs.conf()

cfg.members[0].priority = 0

cfg.members[0].hidden = true

rs.reconfig(cfg)

配置延迟副本集

cfg = rs.conf()

cfg.members[0].priority = 0

cfg.members[0].hidden = true

cfg.members[0].slaveDelay = 3600

rs.reconfig(cfg)

Configure Non-Voting Replica Set Member

cfg = rs.conf()

cfg.members[3].votes = 0

cfg.members[4].votes = 0

cfg.members[5].votes = 0

rs.reconfig(cfg)