mongo副本集常用命令
来自：www.cookqq.com/blog/8a10a5f3513de4790151433e656202a9

mongo启动程序
mongod --port 27017 --d
bp
ath /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.members[0].priority = 0.5
cfg.members[1].priority = 2
cfg.members[2].priority = 2
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)