In CentOS, Mongodb automatically backs up and deletes the backup that was created several days ago.

Note:

Mongodb database server

Operating system: CentOS

Mongodb database version: mongodb-linux-x86_64-2.6.x

Specific operations:

1. Create a Mongodb database backup directory

Mkdir-p/home/backup/mongod_bak/mongod_bak_now

Mkdir-p/home/backup/mongod_bak/mongod_bak_list

2. Create a Mongodb database backup script

Vi/home/crontab/cmdd_bak.sh # Create a file and enter the following code:

#! /Bin/sh

DUMP =/usr/local/mongodb/bin/mongodump # mongodump backup file execution path

OUT_DIR =/home/backup/mongod_bak/mongod_bak_now # temporary backup directory

TAR_DIR =/home/backup/mongod_bak/mongod_bak_list # backup storage path

DATE = 'date + % Y _ % m _ % d' # obtain the current system time

DB_USER = username # Database account

DB_PASS = 123456 # database password

DAYS = 7 # DAYS = 7 indicates that the backup created seven DAYS ago is deleted, that is, only the backup of the last seven DAYS is retained.

TAR_BAK = "mongod_bak_mongodate.tar.gz" # Name of the final database backup file

Cd $ OUT_DIR

Rm-rf $ OUT_DIR /*

Mkdir-p $ OUT_DIR/$ DATE

$ DUMP-u $ DB_USER-p $ DB_PASS-o $ OUT_DIR/$ DATE # back up all databases

Tar-zcvf $ TAR_DIR/$ TAR_BAK $ OUT_DIR/$ DATE compressed into .tar.gz format

Find $ TAR_DIR/-mtime + $ DAYS-delete # delete the backup file seven DAYS ago

: Wq! # Save and exit

3. Modify file attributes to make them executable.

Chmod + x/home/crontab/mongod_bak.sh

4. Modify/etc/crontab # Add a scheduled task

Vi/etc/crontab # Add

30 1 * root/home/crontab/mongod_bak.sh # indicates that backup is performed at every day.

5. Restart crond to make the settings take effect.

/Etc/rc. d/init. d/crond restart

Chkconfig crond on # set to boot

Service crond start # start

In the/home/backup/mongod_bak/mongod_bak_listdirectory every day, you can see the contents such as mongod_bak_2015_02_28.tar.gz.

Compressed file.

Now, the Mongodb database is automatically backed up in Linux and the backup is completed several days ago.

Appendix: Mongodb database restoration

Restore all databases:

Mongorestore -- drop -- directoryperdb/home/backup/mongod_bak/mongod_bak_now/2015_02_28/

Recover a single database:

Mongorestore -- drop-d dataname -- directoryperdb/home/backup/mongod_bak/mongod_bak_now/2015_02_28/dataname

-- Drop parameter: delete the original database data before restoring data to avoid data duplication.

-- Directoryperdb parameter: database backup directory

-D parameter: name of the database to be restored