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MongoDB Backup and Restore

2015-03-17 @ Databases, MongoDB

Backup

mongodump --db test --out /tmp/dump

Restore

mongorestore --db test /tmp/dump/test/

Full Cluster Backup

  • Pick one shard+configserver
  • Stop Balancer via mongos
  • Lock Shardserver
  • Lock Configserver
  • LVM Snapshot
  • Unlock Shardserver
  • Unlock Configserver
  • mount snapshot
  • tar content
  • unmount snapshot
  • delete lvm snapshot

Full Cluster Restore

There are multiple scenarios of backing up

Shard Cluster Full Restore

  • Shutdown mongos
  • Shutdown configservers
  • Shutdown shardservers
  • extract shardserver dbpath to every server
  • extract configserver dbpath to every configserver
  • start up shard servers
  • start up config servers
  • start up mongos

Temp MongoDB Instance

if you have a fully sharded cluster and have backup from data dir of shard servers you can

mkdir /data/mongo1/testrestore
cd /data/mongo1/testrestore
tar xfvz /tmp/mongo04-2015-03-13.tar.gz ./mongodb
mongod --bind_ip 127.0.0.1 --port 30000 --dbpath mongodb/
mongodump --host 127.0.0.1 --port 30000 --db Project1_Test --out dump

Fun part is that you acutally import the dumped data into the mongos

mongorestore --host 127.0.0.1 --port 27017 --username admin -pxxx --authenticationDatabase admin --db Project1RESTORE dump/Project1_Test/

Dump oplog

Obacht, –oplog does not dump the oplog collection.

mongodump --db local --host localhost:27018 --username xxx -pxxx --collection oplog.rs --authenticationDatabase admin --out /tmp/