部署

无安全认证三节点复制集合

replication:
   replSetName: "rs0"
net:
   bindIp: localhost, mongodbX.example.com

sudo mkdir -p /data/db
sudo chown mongod:mongod /data/db/
sudo mongod --config mongod.conf

rs.initiate( {
   _id : "rs0",
   members: [
      { _id: 0, host: "mongodb0.example.com:27017" },
      { _id: 1, host: "mongodb1.example.com:27017" },
      { _id: 2, host: "mongodb2.example.com:27017" }
   ]
})

mongo --host 'rs0/mongodb0.example.com:27017,mongodb1.example.com:27017.mongodb2.example.com:27017'
rs.conf()
rs.status()

复制集合中添加一个仲裁节点

sudo mkdir /data/arb
sudo chown mongod:mongod /data/arb
mongod --port 27017 --dbpath /data/arb --replSet rs0 --bind_ip 0.0.0.0

rs.addArb("mongodb3.example.com:27017")

调整复制集中节点的优先级

cfg = rs.conf()

cfg.members[0].priority = 0.5
cfg.members[1].priority = 2
cfg.members[2].priority = 2

rs.reconfig(cfg)

阻止一个节点变为主节点

cfg = rs.conf()

cfg.members[2].priority = 0

rs.reconfig(cfg)

配置一个隐藏节点

cfg = rs.conf()

cfg.members[2].priority = 0
cfg.members[2].hidden=true

rs.reconfig(cfg)

配置一个延迟从节点

cfg = rs.conf()

cfg.members[2].priority = 0
cfg.members[2].hidden = true
cfg.members[2].slaveDelay = 3600

rs.reconfig(cfg)

复制集中移除一个节点

1. 停止要移除的节点

cfg = rs.conf()

cfg.members.splice(2,1)

rs.reconfig(cfg)

添加一个节点

rs.add( { host: "mongodb2.example.net:27017", priority: 1, votes: 1 } )

TODO