Docker Storage

This is my second attempt at making a docker and even an automated-build one. This is mostly a Cheatsheet for myself but if it helps you I'm glad

It creates a debian/jessie storage container. I created it to work with my Apache2/Php5 container but I'm sure I will use it in many other ways (e.g. the one I made - GitHub : t4keo/apache-php - Docker : t4keo/apache-php).

How to launch it

To launch this docker you just have to use one command in order to make it work in background. Since it's a storage container, make sure that you launch it before the apache-php container and even before any container that needs data from it :

$ docker run -id --name storage t4keo/storage bash

• The -id is used to launch the container in interactive and detached mode
• the --name option is used to give a comprehensive name to the container

If you want to enter in the container to work on it, just use the command below :

$ docker exec -it storage bash

• -it is used to enter interactive mode and show the terminal

How it works ?

The volume linked to the others is the /home so if you want to use the datas that you put in in an other folder you just have to create a symbolic link.

E.g. I want my website in my apache-php container but how can I do it ? First I place my website in a folder called "html"

$ docker exec -it storage bash
$ mkdir /home/html
$ exit

• Enter in the storage container
• Create the html folder
• Exit the container

Then I locate where is this created folder

$ docker inspect storage

Which tells me something like

...
 "Volumes": {
        "/home": "/var/lib/docker/volumes/803a45ba......e6c52d947/_data"
    },
    "VolumesRW": {
        "/home": true
    },
...

I then enter in this folder using WinSCP (or any FTP client) in SFTP and place all the files and folders of my website.

And voila

How to remove this container

First make sure that you have stopped all the other running container linked to this one (safety's first) and stop it

$ docker stop [linkded-container name]
...
$ docker stop storage

Then remove it using the -v option which will delete the associated volume so it clears up the space it tooks at creation and with all the stored data in this basic storage container

$ docker rm -v storage