mongodb 3.4 学习 (五）备份&恢复

备份恢复命令

mongodump -h 127.0.0.1 -p 27017 -o /opt/backup -u app -p '@app' --collection demo --db app --oplog
mongorestore -h 127.0.0.1 -p 27017 -u app -p '@app' /opt/backup/mongodump-2013-10-24 --oplogReplay

配置Hidden Secondary用于备份

conf = rs.conf()
{
......
    "members" : [
        {
            "_id" : 0,
            "host" : "10.0.70.105:27021",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {

            },
            "slaveDelay" : NumberLong(0),
            "votes" : 1
        },
        {
            "_id" : 1,
            "host" : "10.0.70.105:27022",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {

            },
            "slaveDelay" : NumberLong(0),
            "votes" : 1
        },
        {
            "_id" : 2,
            "host" : "10.0.70.105:27023",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {

            },
            "slaveDelay" : NumberLong(0),
            "votes" : 1
        }
    ],
......
}

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

conf
{
    ......
        "members" : [
        {
            "_id" : 0,
            "host" : "10.0.70.105:27021",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {

            },
            "slaveDelay" : NumberLong(0),
            "votes" : 1
        },
        {
            "_id" : 1,
            "host" : "10.0.70.105:27022",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {

            },
            "slaveDelay" : NumberLong(0),
            "votes" : 1
        },
        {
            "_id" : 2,
            "host" : "10.0.70.105:27023",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : true,
            "priority" : 0,
            "tags" : {

            },
            "slaveDelay" : NumberLong(0),
            "votes" : 1
        }
    ],
    ......
}

rs.reconfig(conf)

# 锁写
use admin
db.fsyncLock()

# 查看锁状态
use admin
db.currentOp()

# 解锁
use admin
db.fsyncUnlock()

备份shard群集

# 1 关闭balancer
use config
sh.stopBalancer()

# 2 锁定所有shard的复制集
db.fsyncLock()

# 3 修改CSRS的复制集配置
use config
db.BackupControl.findAndModify(
   {
     query: { _id: 'BackupControlDocument' },
     update: { $inc: { counter : 1 } },
     new: true,
     upsert: true,
     writeConcern: { w: 'majority', wtimeout: 15000 }
   }
)

# 验证CSRS
rs.slaveOk()
use config

db.BackupControl.find(
   { "_id" : "BackupControlDocument", "counter" : 1 }
).readConcern('majority');

# 4 锁定CSRS的复制集
db.fsyncLock()

# 5 备份CSRS
mongodump --oplog

# 6 解锁CSRS
db.fsyncUnlock()

# 7 备份所有的shard
mongodump --oplog

# 8 解锁备份所有的shard
db.fsyncUnlock()

# 9 启动balancer
use config
sh.setBalancerState(true)

在新shard群集恢复数据

# 1 部署新shard复制集

# 2 部署新CSRS服务器

# 3 启动mongos服务

# 4 加入shard到群集

# 5 关闭mongs服务

# 6 恢复shard数据
mongorestore --drop --oplogReplay /data/dump/shardA --port 27021

# 7 恢复CSRS服务器
mongorestore --drop --oplogReplay /data/dump/configData

# 8 启动mongs服务

# 9 重启CSRS服务

# 10 重启shard服务

# 11 重启其他mongs服务

# 12 校验群集
db.printShardingStatus()
show collections