Docker Volume

 Docker volume: Theory

https://muhammadbasirbaig.medium.com/types-of-volumes-in-docker-9ddc84d6f5d9#:~:text=%20Types%20Of%20Volumes%20In%20Docker%20%201,if%20the%20data%20is%20only%20going...%20More%20

[root@ip-172-31-39-133 ~]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED        SIZE

mysql        latest    70325c69f1fe   3 days ago     447MB

----

docker image inspect mysql

            "Image": "sha256:70085967b5e8a570f801bad787ac3551abe82bd06aeeae4acc402c5f8f706948",

            "Volumes": {

                "/var/lib/mysql": {}

=---------------

[root@ip-172-31-39-133 ~]# docker container run -d --name mysql_demo -e  MYSQL_ALLOW_EMPTY_PASSWORD=true mysql

fc9adc908367882debb884010f4093c56071df898924b21c1b187a36f253f731

[root@ip-172-31-39-133 ~]# docker ps

CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS                 NAMES

fc9adc908367   mysql     "docker-entrypoint.s…"   6 seconds ago   Up 5 seconds   3306/tcp, 33060/tcp   mysql_demo

2ba149181b54   nginx     "/docker-entrypoint.…"   14 hours ago    Up 14 hours    80/tcp                elegant_cray

[root@ip-172-31-39-133 ~]#

[root@ip-172-31-39-133 ~]# docker volume ls

DRIVER    VOLUME NAME

local     83a13c22bec37287e671d8654b8fb8b19c48cbcc338a7f7ea54772ce1b71dd33

[root@ip-172-31-39-133 ~]#

[root@ip-172-31-39-133 _data]# pwd

/var/lib/docker/volumes/83a13c22bec37287e671d8654b8fb8b19c48cbcc338a7f7ea54772ce1b71dd33/_data

[root@ip-172-31-39-133 dockerdemo]# docker container exec -it fc9adc908367 bash

bash-4.4# mysql

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 8.0.30 MySQL Community Server - GPL

Copyright (c) 2000, 2022, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| sys                |

+--------------------+

4 rows in set (0.01 sec)

mysql> create database kishor

    -> ;

Query OK, 1 row affected (0.01 sec)

mysql> create database satish

    -> ;

Query OK, 1 row affected (0.01 sec)

mysql> create database satish

    -> ;

ERROR 1007 (HY000): Can't create database 'satish'; database exists

mysql> create database ganesh;

Query OK, 1 row affected (0.01 sec)

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| ganesh             |

| information_schema |

| kishor             |

| mysql              |

| performance_schema |

| satish             |

| sys                |

+--------------------+

7 rows in set (0.00 sec)

-------------

created new container:

[root@ip-172-31-39-133 dockerdemo]# docker container run -d --name mysql_demo -e  MYSQL_ALLOW_EMPTY_PASSWORD=true mysql

54e7eace755057e125576b84098cbcd1eb2b44e878d932b8e8221dc23cbab6d2

[root@ip-172-31-39-133 dockerdemo]# docker exec -it 54e bash

bash-4.4# mysql

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 8.0.30 MySQL Community Server - GPL

Copyright (c) 2000, 2022, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| sys                |

+--------------------+

4 rows in set (0.00 sec)

mysql>

================

[root@ip-172-31-39-133 dockerdemo]# docker run -itd -v 83a13c22bec37287e671d8654b8fb8b19c48cbcc338a7f7ea54772ce1b71dd33:/var/lib/mysql mysql

85901506b9ae2bab09c8a104b49d63db0a083e3dac5674c464d88d526e00ad69

[root@ip-172-31-39-133 dockerdemo]# docker ps

CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS          PORTS                 NAMES

85901506b9ae   mysql     "docker-entrypoint.s…"   5 seconds ago    Up 4 seconds    3306/tcp, 33060/tcp   elated_jemison

54e7eace7550   mysql     "docker-entrypoint.s…"   10 minutes ago   Up 10 minutes   3306/tcp, 33060/tcp   mysql_demo

[root@ip-172-31-39-133 dockerdemo]# docker exec -it 85901506b9ae bash

bash-4.4# mysql

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 8.0.30 MySQL Community Server - GPL

Copyright (c) 2000, 2022, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| ganesh             |

| information_schema |

| kishor             |

| mysql              |

| performance_schema |

| satish             |

| sys                |

+--------------------+

7 rows in set (0.15 sec)

mysql>

=============

[root@ip-172-31-39-133 ~]# docker volume create myvol

myvol

[root@ip-172-31-39-133 ~]# cd /var/lib/docker/volumes/

[root@ip-172-31-39-133 volumes]# ls -l

total 24

drwx-----x 3 root root     19 Aug 30 18:30 83a13c22bec37287e671d8654b8fb8b19c48cbcc338a7f7ea54772ce1b71dd33

drwx-----x 3 root root     19 Aug 30 18:36 8db408011f86a213df2975039da6177698f5cfcd9a8451d9b3bf54003fae502b

brw------- 1 root root 202, 1 Aug 30 18:58 backingFsBlockDev

-rw------- 1 root root  32768 Aug 30 18:59 metadata.db

drwx-----x 3 root root     19 Aug 30 18:59 myvol

drwx-----x 3 root root     19 Aug 30 18:50 test

[root@ip-172-31-39-133 volumes]# docker volume create myvol1

myvol1

[root@ip-172-31-39-133 volumes]# docker volume create myvol2

myvol2

[root@ip-172-31-39-133 volumes]# docker volume ls

DRIVER    VOLUME NAME

local     8db408011f86a213df2975039da6177698f5cfcd9a8451d9b3bf54003fae502b

local     83a13c22bec37287e671d8654b8fb8b19c48cbcc338a7f7ea54772ce1b71dd33

local     myvol

local     myvol1

local     myvol2

local     test

-----------

Remove Volume:

[root@ip-172-31-39-133 volumes]# docker volume rm myvol2

myvol2

Prune Volume: Remove un used volume:

[root@ip-172-31-39-133 volumes]# docker volume prune

WARNING! This will remove all local volumes not used by at least one container.

Are you sure you want to continue? [y/N] y

Deleted Volumes:

myvol

myvol1

Total reclaimed space: 0B

[root@ip-172-31-39-133 volumes]#

==================

https://dockerlabs.collabnix.com/beginners/volume/create-a-volume-mount-from-dockerfile.html

==============

Bind Mount:

[root@ip-172-31-39-133 volumes]# cd /dockerdemo/

[root@ip-172-31-39-133 dockerdemo]# ls -l

total 114296

-rw-r--r-- 1 root root        34 Aug 30 04:36 Dockerfile

-rw-r--r-- 1 root root 117034496 Aug 30 03:53 mycon.tar

[root@ip-172-31-39-133 dockerdemo]# pwd

/dockerdemo

[root@ip-172-31-39-133 dockerdemo]# docker run -it -v /dockerdemo:/tmp/test ubuntu bash

root@5d3b1c485eb1:/# ls -l /tmp/test/

total 114296

-rw-r--r-- 1 root root        34 Aug 30 04:36 Dockerfile

-rw-r--r-- 1 root root 117034496 Aug 30 03:53 mycon.tar

root@5d3b1c485eb1:/#

---------------

Docker Network:

https://docs.docker.com/engine/reference/commandline/network/

https://monkelite.com/introduction-to-docker-networking/