-d, -e, -v, --link, inspect, --type, volume, prune

Stateless : Store the data externally, design the container running with external data. Therefore, data will be stored if container deletes. 

 

• docker run -d 

Lets create mysql:5.7 container. And then let my host directory to share with container(mysql:5.7 ) directory.

docker run -d --name wordpressdb_hostvolume -e MYSQL_ROOT_PASSWORD=password -e MYSQL_DATABASE=wordpress -v /Users/joohyunyoon/wordpress_db:/var/lib/mysql mysql:5.7
fa11c38fc73e12370c6363b37bded225b78bd901adf180ddcce03051d6e78b1a

-d : Detached, opposite to -i -t in other words, it estabilished running the application on the foreground, unlike interactive mode -i -t. It executes the container without input and output. It doesnt receive user's input

 

-e : Environment, establish inner environment variable

 

-v or --volume : Volume, share the each containers, seperated by colon characters(:).

/Users/joohyunyoon/wordpress_db:/var/lib/mysql 

                                                     host:container

                                                     -->sharing host directory and container directory

 

And then let two containers link together(wordpress, mysql).

Create wordpress container which name is wordpress_hostvolume.

The 80 port is exposed, it can be accessible with host port.

docker run -d -e WORDPRESS_DB_PASSWORD=password --name wordpress_hostvolume --link wordpressdb_hostvolume:mysql -p 80 wordpress
2751e54411bde98cc979569a0bad77cb3be875c56695b182fba9b101fcd2dcf4

ls /Users/joohyunyoon/wordpress_db/
auto.cnf		client-key.pem		ibdata1			private_key.pem		sys
ca-key.pem		ib_buffer_pool		ibtmp1			public_key.pem		wordpress
ca.pem			ib_logfile0		mysql			server-cert.pem
client-cert.pem		ib_logfile1		performance_schema	server-key.pem

There are all sorts of mysql files shared in /Users/joohyunyoon/wordpress_db

 

After remove all of them, let's check them out whether they are still there or not.

docker stop wordpress_hostvolume wordpressdb_hostvolume
wordpress_hostvolume
wordpressdb_hostvolume

docker rm wordpress_hostvolume wordpressdb_hostvolume
wordpress_hostvolume
wordpressdb_hostvolume

ls /Users/joohyunyoon/wordpress_db/
auto.cnf		client-key.pem		ibdata1			public_key.pem		wordpress
ca-key.pem		ib_buffer_pool		mysql			server-cert.pem
ca.pem			ib_logfile0		performance_schema	server-key.pem
client-cert.pem		ib_logfile1		private_key.pem		sys
//there are still here alive!

 

• docker volume create --name myvolume

Create volume which name is myvolume.

docker volume create --name myvolume
myvolume

docker volume ls
DRIVER    VOLUME NAME
local     myvolume

docker run -i -t --name myvolume_1 -v myvolume:/Users/joohyunyoon/ ubuntu:14.04 //myvolume has been mounted to Users/joohyunyoon/
root@1973b8bfb876:/# echo hello
hello

docker volume ls : check the volume list

 

• docker inspect --type volume myvolume

docker inspect --type volume myvolume
[
    {
        "CreatedAt": "2021-02-17T09:06:49Z",
        "Driver": "local",
        "Labels": {},
        "Mountpoint": "/var/lib/docker/volumes/myvolume/_data",
        "Name": "myvolume",
        "Options": {},
        "Scope": "local"
    }
]

inspect : return low-level informatino on docker objects

 

--type : return JSON for specified type

 

• docker system prune --volumes

To remove all unused volumes.