Docker commands

Images

Using the docker pull <image> you get access to any software container.

$ docker pull redis
$ docker pull neo4j
$ docker pull mysql/mysql-server
$ docker pull cassandra
$ docker pull postgres

Miscelaneous

Shows several useful commands for a daily job usage.

$ docker images
$ docker ps

If you need to search for available Docker Hub images, you can use the following command.

$ docker search mariadb

This command will give you the names of images that are related to the 'mariadb' item.

$ docker stop --time=30 mariadbtest (1)
$ docker kill mariadbtest (2)
$ docker rm mariadbtest (3)
$ docker rm -v mariadbtest (4)
$ docker logs mariadbtest (5)
$ docker exec -it mariadbtest bash (6)

1	Stop the container, the time of 30 will tell the daemon to wait this time to actually stop the container, if this parameter is not set, it stops immediately.
2	Kill the container.
3	Remove the container (any data is permanently lost).
4	Remove the internal volume data when the container was created.
5	Get container logs.
6	Accessing the container. This allows to see the internal folders, environment, etc.

Connecting Mariadb from outside the container.

$ docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' mariadbtest (1)

1	locate the IP the container uses.

Forcing a TCP Connection On the host, run the client and set the server address ("-h") to the container’s IP address that you found in the previous step:

$ mysql -h 172.17.0.2 -u root -p
$ mysql -h 172.17.0.2 -P 3306 --protocol=TCP -u root -p

When you need to create an image using the 'DockerFile' script, use the following command.

$ docker build -t [image-name]:[versiontag] . (1)

1	The dot indicates the folder where the 'DockerFile' resides.

If you need to explore the image files, use

$ docker exec -it [container-name-or-id] bash