Docker101-Volumenes

docker pull nginx

docker volume create --name barcelona

docker volumen ls

//running the container with the volume
docker run -it -v barcelona:/barcelona --name volumeslab nginx /bin/bash

//whithin the container go to the volume mounted
cd /barcelona

// create a file 
touch file.txt

//exit the container
Ctrl+P and Ctrl+Q

//Inspect the volume
docker volume inspect barcelona

//go to the location of the volumen in you SO directory
cd /var/lib/docker/volumes/barcelona/_data

//for docker beta for mac https://forums.docker.com/t/host-path-of-volume/12277/2
// screen ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/tty  
//#user: root
//#password: <none>
//$ ls -ltrh /var/lib/docker/volumes

//create another file
touche file2.txt

//return to your running container
docker exec -it volumeslab /bin/bash

//list the container mointed directory
ls /barcelona

/// deleting the container
docker stop container-name

//check for the location of the volumen data at you SO
ls /volumes...

//list volumenes
docker volume ls


//remove the volume 
docker volume rm volumename 

docker volume ls

// create a Directory
mkdir webapp
cd webapp

//create a simple page 
echo '<h1>Hola Dockerers!</h1>' > index.html

//run a container attaching your local folder to you container, at the nginx server directory
// take care of mapping your webapp folder
//check parameters like -d (run containers as daemon, -p use the port 80)
docker run -d -v ~/webapp:/usr/share/nginx/html --name mywebserver -p 80:80 nginx

//test your web app
culr http://localhost  // for mac users
curl http://the-container-ip  //use docker inspect continaerid | grep -i ip

//modified the html page
//and reload the page


/// ****** using a volume to share data amount containers
// create the volume to be shared
docker volume create --name shared-data

//raise one containers using the volume
docker run -it -v shared-data:/foo --name foo nginx /bin/bash

//create a file in the directory mapped to the volume 
echo 'Tu dices "hola"' > /foo/file.txt

//Press Ctrl-P and then Ctrl-Q on you keyboard.
//This exits the container shell but leaves the container running.

//create other container using the same volume
docker run -it -v shared-data:/bar --name bar nginx /bin/bash

//modify the same file, check that for this continaer mounted volume is in /bar