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Backup and restore a mysql database from a running Docker mysql container
# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql
# Restore
cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE
@ambrosiora
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Can someone please tell me, how I get the database dump out of the docker container on my host? The command
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql
seems to dump the file inside the docker container, but I need it on my host. Thanks!

I think, you may use this command to get the files in host from container: docker cp :/file/path/within/container /host/path/target

have you tried to map a volume to your host?
For example, if you dump the .sql file INSIDE the container on /home/dump (or whatever folder you want)
just map this folder as a volume on you host.

I can give you an example with docker-compose.yml. With pure docker I don't know how to map a volume (never needed since I always worked with docker-compose hahaha)

version: '3'
services:
  mydb:
    container_name: mydb
    image: mariadb:latest
    ports:
      - 3306:3306
    environment:
      MYSQL_DATABASE: mydb
      MYSQL_USER: user
      MYSQL_PASSWORD: 123
      MYSQL_ROOT_PASSWORD: 123456
    volumes:
      - /home/host_folder_dump:/home/container_folder_dump

Since you take a mysql dump, automatically the .sql file will appear in your host folder.
Tell me what you think?

@blu-IT
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blu-IT commented Jul 19, 2022

Can someone please tell me, how I get the database dump out of the docker container on my host? The command
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql
seems to dump the file inside the docker container, but I need it on my host. Thanks!

I think, you may use this command to get the files in host from container: docker cp :/file/path/within/container /host/path/target

@nhossaincse

Thanks! I already solved its (inside my script) this way:

docker cp <container_id>:/file/path/within/container /host/path/target

@blu-IT
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blu-IT commented Jul 19, 2022

Since you take a mysql dump, automatically the .sql file will appear in your host folder. Tell me what you think?

@ambrosiora

Thanks! I already solved its (inside my script) this way:

docker cp <container_id>:/file/path/within/container /host/path/target

@behai-nguyen
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Very sweet. Thank you very much.

@echanobe
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Thank you!

@Tipset
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Tipset commented Aug 17, 2022

This helped a bunch, thank you!

@hkanizawa
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Thanks

@tomaszroot
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:-*

@botosdavid
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thank you so much!

@dorimusz
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Thanks a lot!

@ttcosta11
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Thank you!

@tgiovanella87
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Great! Thanks!

@paulovnas
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Very nice... Thank you so much.

@samplec0de
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Exactly what I looking for, thanks!

@nnearobot
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Exactly what I needed. Thank you so much!

@sukruaydinlik
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Thank you so much. Restore command worked like a charm. Unbelieveable to see that instructions on official Docker image page fail.

@razavistag
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this works thank you

@meng7171
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meng7171 commented Jan 8, 2023

good, bro. THANKS.

@paulograbin
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This is awesome, thank you!

@canuk99
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canuk99 commented Jan 26, 2023

Anybody figure out this socket issue?
docker exec zabbix-docker-62_zabbix-server_1 /usr/bin/mysqldump -u root --password=secret -S /var/run/mysqd/mysqld.socket zabbix > ~/zabbix.dump

mysqldump: Got error: 2002: "Can't connect to local server through socket '/var/run/mysqd/mysqld.socket' (2)" when trying to connect
"Can't connect to local server through socket '/var/run/mysqd/"Can't connect to local server through socket '/var/run/mysqd/mysqld.socket' (2)" when trying to connect

mysqld.socket' (2)" when trying to connect

mysql> show variables like 'socket';
+---------------+-----------------------------+
| Variable_name | Value |
+---------------+-----------------------------+
| socket | /var/run/mysqld/mysqld.sock |
+---------------+-----------------------------+
1 row in set (0.01 sec)

mysql> quit
Bye

bash-4.4# ls -l /var/run/mysqld
total 12
-rw-r----- 1 mysql mysql 2 Jan 24 20:28 mysqld.pid
srwxrwxrwx 1 mysql mysql 0 Jan 24 20:28 mysqld.sock
-rw------- 1 mysql mysql 2 Jan 24 20:28 mysqld.sock.lock
srwxrwxrwx 1 mysql mysql 0 Jan 24 20:28 mysqlx.sock

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